Changeset 10109 for firmware/FSC/src


Ignore:
Timestamp:
01/19/11 15:44:25 (14 years ago)
Author:
lutz
Message:
niculin & dom debugged quite some stuff
Location:
firmware/FSC/src
Files:
2 added
12 edited

Legend:

Unmodified
Added
Removed

  • firmware/FSC/src/FSC.c

    r10106 r10109  
    22#include "typedefs.h"
    33#include "application.h"
    4 #include "spare_outs.h"
    54#include "spi_master.h"
    6 #include "ad7719_adc.h"   
     5#include "ad7719_adc.h"
     6#include "atmega_adc.h"   
    77#include "usart.h"
    88#include "macros.h"
    … …  
    1313#include <stdlib.h>
    1414
    15 #include "tests.h"
     15
    1616//-----------------------------------------------------------------------------
    17 
     17// definition of some functions:
     18// these function are implemented below the main()
     19// here in FSC.c
     20//
     21// sooner or later, they will be moved into more apropriate files.
     22U08     increase_adc (U08 channel);
     23U08     increase_ad7719 (U08 channel);
     24void Set_V_Muxer (U08 channel);
     25void Set_T_Muxer(U08 channel);
     26void talk(void);// never used up to now.
     27void ad7719_output(U08 channel, U32 data);
     28void adc_output(U08 channel, U08 data);
     29void adc_output_all();
     30void parse(); //doesn't do anything at the moment
     31void check_if_measured_all() ;
     32// end of function definition:
     33//-----------------------------------------------------------------------------
     34
     35// MAIN WORKFLOW GLOBAL VARIABLES
     36        bool verbose;
     37        bool heartbeat_enable;
     38
     39// USART global variables
     40        U08 usart_rx_buffer[USART_RX_BUFFER_SIZE];
     41        U08 usart_tx_buffer[USART_TX_BUFFER_SIZE];
     42        U08 usart_rx_buffer_index = 0;
     43        U08 usart_tx_buffer_index = 0;
     44        U08 usart_last_char;                                    // last received char
     45
     46// USART FLAGS
     47        bool usart_tx_buffer_overflow = false;  // true if usart_tx_buffer was full.
     48        bool usart_rx_ready = false;                    // EOL was received, parser needs to be called
     49       
     50// TIMER global variable
     51        volatile U32 local_ms = 0;
     52
     53// AD7719 global variables
     54        #define TEMP_CHANNELS 64
     55        #define CHANNEL_BITMAP 8
     56        #define AD7719_READINGS_UNTIL_SETTLED 1 // bei3:480ms
     57        U32 ad7719_values[TEMP_CHANNELS];
     58        U08 ad7719_enables[CHANNEL_BITMAP];
     59        U08 ad7719_channels_ready[CHANNEL_BITMAP];
     60        U08 ad7719_readings_since_last_muxing = 0;
     61        U08 ad7719_current_channel = 0;
     62        U32 ad7719_current_reading = 0;
     63        bool ad7719_measured_all = false;
     64       
     65// ATMEGA ADC global variables
     66        #define V_CHANNELS 40
     67        #define I_CHANNELS 40
     68        #define H_CHANNELS 4
     69        #define V_BITMAP 5
     70        #define I_BITMAP 5
     71        #define H_BITMAP 1
     72        #define ADC_READINGS_UNTIL_SETTLED 1
     73        U32 adc_values[V_CHANNELS + I_CHANNELS + H_CHANNELS]; // stores measured voltage in steps of 16mV
     74        U08 adc_enables[V_BITMAP + I_BITMAP + H_BITMAP];
     75        U08 adc_channels_ready[V_BITMAP + I_BITMAP + H_BITMAP];
     76        U08 adc_readings_since_last_muxing = 0;
     77        U08 adc_current_channel = 0;
     78        U08 adc_current_reading = 0;
     79        bool adc_measured_all = false;
     80
     81//-----------------------------------------------------------------------------
     82//   M A I N    ---   M A I N    ---   M A I N    ---   M A I N    ---  M A I N   
     83//-----------------------------------------------------------------------------
    1884int main(void)
    1985{
    20 // U08 IDN_STR[] = "16ch Pt1000 logger; firmware version of 07.11.10. DN"; // Identity string
    21 
    22         spare_outs_init(); //set spare out pin I/O modes
    23     app_init();           // Setup software modules
    24     usart_init();               // Initialize serial interface   
     86        app_init();               // Setup: Watchdog and I/Os
     87        usart_init();           // Initialize serial interface   
    2588        spi_init();             // Initialize SPI interface as master
    26         adc_init();             // Initialize AD7719 ADC as SPI slave
    27         //  usart_write_crlf();
    28         //  usart_writeln_flash_str(IDN_STR); // Write string to USART interface
    29         //  usart_write_crlf();
     89        ad7719_init();          // Initialize AD7719 ADC as SPI slave
     90        atmega_adc_init();
     91
     92// TIMER2 is used as local clock:
     93// configure timer 2
     94        TCCR2 = (1<<WGM21); // CTC Modus
     95        TCCR2 |= (1<<CS21) | (1<<CS20); // Prescaler 64 --> counts up every 8us
     96        OCR2 = 125-1;                                   // --> output compare interrupt occurs every 125 x 8us = 1ms
     97        // Compare Interrupt erlauben
     98        TIMSK |= (1<<OCIE2);
    3099
    31100  //  Enable interrupts
    32101  sei();             
    33  
    34 
    35         // temperature muxer pins init:
    36         // SA - pins
    37         DDRA |= 0x3F; // set all SA-pins as outputs
    38        
    39 
    40         // voltage, current, humidity - muxer pins:
    41         // SB - pins
    42         DDRC |= 0x7F; // set all SB - pins as outputs
    43        
    44         // SB - muxer test
    45 //      DDRA |= 1<<PA6 ; // set D0-0 lina as output. for tests only !!!
    46 //      PORTA |= 1<<PA6; // set D0-0 line high. for tests only !!!
    47 DDRA &= ~(1<<PA6);
    48 
    49 //ADC einschalten
    50   ADMUX = 0x26;  //0010.0110     // interne Referenzspannung nutzen
    51   ADCSRA = (1<<ADPS1) | (1<<ADPS0);     // Frequenzvorteiler
    52   ADCSRA |= (1<<ADEN);                  // ADC aktivieren
    53   ADCSRA |= (1<<ADSC);
    54 
    55 
    56 
    57 // Main loop
    58 //float temperature;
     102
     103for ( U08 i=0; i<CHANNEL_BITMAP; ++i ) {
     104        ad7719_enables[i]=0xFF;
     105        ad7719_channels_ready[i]=0;
     106        }
     107for ( U08 i=0; i<V_BITMAP + I_BITMAP + H_BITMAP; ++i ) {
     108        adc_enables[i]=0xFF;
     109        adc_channels_ready[i]=0;
     110}
     111        static U08 welcome[]="\n\nwelcome to FACT FSC commandline interface v0.1\nready?";
     112        usart_write_str(welcome);
     113
     114
     115//MAIN LOOP
     116while (1)
     117{
     118        if (heartbeat_enable) PORTB ^= (1<<PB3); // toggle Out2_spare --> heartbeat
     119//----------------------------------------------------------------------------
     120        //IF we need to send away one byte, and ready to send
     121
     122        if ( (usart_tx_buffer_index > 0) && (UCSRA & (1<<UDRE)) ) {
     123                UDR = usart_tx_buffer[0];
     124                // THis is shit
     125                for (U08 i=0 ; i < USART_TX_BUFFER_SIZE; ++i) {
     126                        usart_tx_buffer[i] = usart_tx_buffer[i+1];
     127                }
     128                usart_tx_buffer_index--;
     129        }
     130//----------------------------------------------------------------------------
     131
     132        //IF we just received one byte, and there is enough space in the RX_buffer
     133        if ( (UCSRA & (1<<RXC)) && (usart_rx_buffer_index < USART_RX_BUFFER_SIZE) ){
     134                usart_last_char = UDR;
     135                if (usart_last_char == '\n'){ // if EOL was received
     136                        usart_rx_ready = true;
     137                }else {
     138                usart_rx_buffer[usart_rx_buffer_index] = usart_last_char;
     139                usart_rx_buffer_index++;
     140                }
     141                // here is still something strange .... better send an enter automatically
     142        } else if (UCSRA & (1<<RXC)) { // if there is no scace in the buffer; read anyway.
     143                usart_last_char = UDR;
     144                usart_rx_buffer_index =0;
     145        }
     146//----------------------------------------------------------------------------
     147
     148        //IF USART DOR bit is set, PC is sending data to fast!!!
     149        if ( UCSRA & (1<<DOR) ){
     150                // flush TX_buffer and write warning message in
     151                // maybe even switch off every measurement. ?
     152        }
     153//----------------------------------------------------------------------------
     154
     155        //IF TX_BUFFER was overrun.     
     156        if (usart_tx_buffer_overflow) {
     157                // flash TX_buffer and write warning message in
     158                // maybe even switch off every measurement. ?
     159                //
     160                // this should only happen, in verbose mode and with low baudrates.
     161        }
     162//----------------------------------------------------------------------------
     163       
     164        //IF one command was received.
     165        //      -It is not allowed to send more than one command between two '\n'
     166        if (usart_rx_ready){
     167                parse();
     168                usart_rx_buffer_index = 0;
     169                usart_rx_ready = false;
     170        }
     171//----------------------------------------------------------------------------
     172
     173        //IF ATmega internal ADC did finish a conversion --every 200us
     174        if ( (ADCSRA & (1<<ADIF)) && !adc_measured_all) {
     175                adc_current_reading = ADCH;
     176                if (adc_readings_since_last_muxing == ADC_READINGS_UNTIL_SETTLED) {
     177                        adc_values[adc_current_channel] = adc_current_reading;
     178                        adc_readings_since_last_muxing=0;
     179                        // note that this channel is ready, now and
     180                        adc_output(adc_current_channel, adc_current_reading);
     181                        // proceed to the next enabled channel.
     182                        adc_channels_ready[adc_current_channel/8] |= (1<<(adc_current_channel%8));
     183                        adc_current_channel = increase_adc (adc_current_channel);
     184                        Set_V_Muxer(adc_current_channel);
     185                } else { // the ADC did not settle yet, we discard the reading
     186                        ++adc_readings_since_last_muxing;
     187                        // current reading is not used for anything else
     188                }
     189        }
     190//----------------------------------------------------------------------------
     191
     192        //IF AD7719 ADC just finished a conversion -- every 60ms
     193       
     194        if (AD7719_IS_READY()) {
     195                        ad7719_current_reading = read_adc(); // --takes at 4MHz SCLK speed about 6us
     196                // AD7719 is only read out if settled. saves time.     
     197                if (ad7719_readings_since_last_muxing == AD7719_READINGS_UNTIL_SETTLED) {
     198                        ad7719_values[ad7719_current_channel] = ad7719_current_reading;
     199                        ad7719_readings_since_last_muxing=0;
     200                        // now prepare the data to be send away via USART.
     201                        //ad7719_output(ad7719_current_channel, ad7719_current_reading);
     202                        // note that this channel is ready, now and
     203                        // proceed to the next enabled channel.
     204                        ad7719_channels_ready[ad7719_current_channel/8] |= (1<<(ad7719_current_channel%8));
     205                        ad7719_current_channel = increase_ad7719 (ad7719_current_channel);
     206                        Set_T_Muxer(ad7719_current_channel);
     207                } else { // the AD7719 did not settle yet, we discard the reading
     208                        ++ad7719_readings_since_last_muxing;
     209
     210                        // current reading is not used for anything else
     211                }
     212        }
     213//----------------------------------------------------------------------------
     214        //IF one of the ADC measured all channels, we wanted to know.
     215        check_if_measured_all();
     216       
     217        if (ad7719_measured_all && adc_measured_all)
     218                adc_output_all();
     219
     220//----------------------------------------------------------------------------
     221/*
     222        if (verbose == true)
     223                // talk() was just defined so the
     224                // code is not at this place ... look down.
     225                talk();
     226*/
     227
     228} // end of MAIN LOOP
     229//-----------------------------------------------------------------------------
     230//    E N D     E N D     E N D     E N D     E N D     E N D     E N D     
     231//-----------------------------------------------------------------------------
     232
     233
     234
    59235float resistance;
    60 BOOL heartbeat_enable = TRUE;
    61 
    62 U08 SA_mux_val = 0x16;
     236
     237U08 SA_mux_val = 0x00;
    63238U08 SB_mux_val = 0x00;
    64239
    … …  
    69244while (TRUE)
    70245         {
    71                 // this heartbeat shows how long one single run of this while loop takes
    72                 // measure with a scope.
    73                 if (heartbeat_enable) PORTB ^= (1<<PB3); // toggle Out2_spare --> heartbeat
    74                 adc_init();
     246
    75247
    76248  ++Res_or_Volt;
    … …  
    121293
    122294
    123                 startconv();
    124 
    125        
    126                 while (!ADC_IS_READY())
     295                startconv(0);
     296
     297       
     298                while (!AD7719_IS_READY())
    127299                {
    128300                // just wait until ADC is redy -- really bad code here!
    … …  
    141313                //_delay_ms(200);
    142314
    143                 startconv();
    144 
    145                 while (!ADC_IS_READY())
     315                startconv(0);
     316
     317                while (!AD7719_IS_READY())
    146318                {
    147319                // just wait until ADC is redy -- really bad code here!
    … …  
    255427
    256428for (U08 counter = 0; counter < 1; ++counter) {
    257         ADCSRA |= (1<<ADSC);
    258429        while (ADCSRA & (1<<ADSC) );    // wait until internal ADC is ready
    259430        float voltage;
    … …  
    362533
    363534
    364 
     535ISR (TIMER2_COMP_vect)
     536{
     537 ++local_ms;
     538}
     539
     540
     541U08     increase_adc (U08 channel){
     542bool valid_ch_found = false;
     543        while (!valid_ch_found){
     544       
     545                // just increase 'channel' or turnover to zero.
     546                ++channel;
     547                if (channel == V_CHANNELS + I_CHANNELS + H_CHANNELS)
     548                        channel = 0;
     549       
     550                // check if this channel is enabled in the bitmap
     551                if (adc_enables[channel/8] & (1<<channel%8))
     552                        valid_ch_found = true;
     553        } // end of while loop
     554        return channel;
     555} // end if increase_adc;
     556
     557U08     increase_ad7719 (U08 channel){
     558bool valid_ch_found = false;
     559        while (!valid_ch_found){
     560       
     561                // just increase 'channel' or turnover to zero.
     562                ++channel;
     563                if (channel == TEMP_CHANNELS)
     564                        channel = 0;
     565       
     566                // check if this channel is enabled in the bitmap
     567                if (ad7719_enables[channel/8] & (1<<channel%8))
     568                        valid_ch_found = true;
     569        } // end of while loop
     570        return channel;
     571} // end if increase_adc;
     572
     573
     574// Sets voltage Muxer to current channel
     575// this is a Muxing, and therefor the adc might need some time to settle.
     576// Since there are:
     577//      - 40 voltage monitor channels
     578//      - 40 current monitor channels
     579//      - 4 humidity monitor channels
     580// the muxer is set as follows.
     581// channel 00..39 --> looking at the voltage channels
     582// channel 40..79 --> looking at the current channels
     583// channel 80..83 --> looking at the humidities
     584void Set_V_Muxer (U08 channel){
     585U08 SB = 0;
     586        // voltages
     587        if (channel < 40) {
     588                if (channel < 36)
     589                        SB = channel*2;
     590                else
     591                        SB = (channel+1)*2;
     592        }
     593        // currents
     594        else if (channel < 80) {
     595                channel -= 40;
     596                if (channel < 36)
     597                        SB = channel*2+1;
     598                else
     599                        SB = (channel+1)*2+1;
     600        }
     601        // humidities
     602        else if (channel < 84) {
     603                channel -= 80;
     604                switch (channel) {
     605                        case 0:
     606                                SB = 0x48; //0100.1000
     607                                break;
     608                        case 1:
     609                                SB = 0x49; //0100.1001
     610                                break;
     611                        case 2:
     612                                SB = 0x58; //0101.0010
     613                                break;
     614                        case 3:
     615                                SB = 0x58; //0101.0011
     616                                break;
     617                } // end of switch-case
     618        } // end of if (channel < some_number)
     619
     620        PORTC = (PORTC & 0x80) | (0x7F & SB); // Here the muxer is switched.
     621}
     622
     623void Set_T_Muxer(U08 channel) {
     624U08 SA = 0x00;
     625
     626        switch (channel/16) {
     627                case 0:
     628                        SA |= 1<<4; // 0001.0000
     629                        break;
     630                case 1:
     631                        break;          // 0000.0000
     632                case 2:
     633                        SA |= (1<<4)|(1<<5); // 0011.0000
     634                        break;
     635                case 3:
     636                        SA |= 1<<5;  // 0010.0000
     637                        break;
     638        }
     639       
     640        SA =  SA | (channel%16);
     641       
     642        PORTA = (PORTA & 0xC0) | (0x3F & SA); // Here the muxer is switched.
     643}
     644
     645void talk(void){
     646
     647/*
     648// makes no sense to declare the 'new_measurement' vars here
     649// but maybe the whole function will be deleted, anyway ...
     650// I'm thinking about it.
     651bool ad7719_new_measurement;
     652bool atmega_adc_new_measurement;
     653        if (verbose == true) {
     654                // somebody wants to read every new measured value, even if it is trash!
     655                        // do not actually send away data !
     656                        // just prepare the data to be send away.
     657                if ( ad7719_new_measurement  == true ) {
     658                        add_str_to_output_stream("ad7719: reading:");
     659                        add_dec_to_output_stream(reading_since_last_muxer_switch,1);
     660                        add_str_to_output_stream(" temperature channel:");
     661                        add_dec_to_output_stream(current_temperature_channel,2);
     662                        add_str_to_output_stream(" = ");
     663                        add_float_to_output_stream(current_ad7719_value,4,3);
     664                        add_str_to_output_stream("\n");
     665                }
     666                if (atmega_adc_new_measurement == true) {
     667                        add_str_to_output_stream("atmega_adc: reading:");
     668                        add_dec_to_output_stream(reading_since_last_muxer_switch,1);
     669                        add_str_to_output_stream(" voltage channel:");
     670                        add_dec_to_output_stream(current_voltage_channel,2);
     671                        add_str_to_output_stream(" = ");
     672                        add_float_to_output_stream(current_atmega_adc_value,4,3);
     673                        add_str_to_output_stream("\n");
     674                }
     675        } // end of: if verbose
     676*/
     677} // end of talk()
     678
     679// this function generates some output.
     680void ad7719_output(U08 channel, U32 data) {
     681        usart_write_str((pU08)"R:"); //R for resistance
     682        usart_write_char('A'+channel/8); // Letters A,B,C,D,E,F,G,H
     683        usart_write_char(' ');
     684        usart_write_U08(channel%8+1,1); // Numbers 1...8
     685        usart_write_char(':');
     686        usart_write_U32_hex(data); //data
     687        usart_write_char('\n');
     688}
     689
     690void adc_output(U08 channel, U08 data) {
     691
     692        if (channel < 40)
     693                usart_write_str((pU08)"V:"); //V for Vendetta
     694        else if (channel < 80)
     695                usart_write_str((pU08)"I:"); //I for Irregular verbs
     696        else if (channel < 84)
     697                usart_write_str((pU08)"H:"); //H for Huurrray!!!
     698
     699        switch (channel/16) {
     700                case 0:
     701                        usart_write_char('A'); //V for Vendetta
     702                case 1:
     703                        usart_write_char('B'); //V for Vendetta
     704                case 2:
     705                        usart_write_char('D'); //V for Vendetta
     706                case 3:
     707                        usart_write_char('C'); //V for Vendetta
     708                case 4:
     709                        usart_write_char('EF'); //V for Vendetta
     710        }
     711        usart_write_char(' ');
     712        usart_write_U08((channel/2)%8+1,1); // Numbers 1...8
     713        usart_write_char(':');
     714        usart_write_U16((U16)data*16,5); //data
     715        usart_write_char('\n');
     716
     717
     718}
     719
     720
     721void adc_output_all() {
     722        // output all values, which are enabled
     723        for (U08 i=0 ; i<40; ++i){
     724                if (i==0) usart_write_str((pU08)"voltages:(in units of 16mV)\n");
     725                if (i==40) usart_write_str((pU08)"currents:\n");
     726                if (i==80) usart_write_str((pU08)"humidities:\n");
     727                if (adc_enables[i/8] & i%8){
     728                        usart_write_U08(adc_values[i],3);
     729                        usart_write_char('\t');
     730                }
     731                if (i%8==7) usart_write_char('\n');
     732                if (i==83) usart_write_char('\n');
     733        }
     734}
     735
     736
     737// this method parses the data,
     738// which came in via USART
     739// later it might as well parse the data from ethernet.
     740void parse() {
     741U08 command = usart_rx_buffer[0];
     742// look at first byte
     743// I hope, I can manage to use one byte commands
     744        usart_rx_buffer[USART_RX_BUFFER_SIZE-1] = 0;
     745        usart_write_str((pU08)"got:");
     746        usart_write_str(usart_rx_buffer);
     747       
     748       
     749
     750        switch (command) {
     751                case 'E':                       // AD7719 enable bitmaps may be set
     752                        for ( U08 i=0; i<CHANNEL_BITMAP; ++i ) {
     753                                ad7719_enables[i]=usart_rx_buffer[i+1];
     754                                ad7719_channels_ready[i]=0;
     755                        }
     756                        break;
     757                case 'e':                       // ATmega internal ADC enable bitmaps may be set
     758                        for ( U08 i=0; i<V_BITMAP + I_BITMAP + H_BITMAP; ++i ) {
     759                                adc_enables[i]=usart_rx_buffer[i+1];
     760                                adc_channels_ready[i]=0;
     761                        }
     762                        break;
     763                case 'h':
     764                        usart_write_str((pU08)"\nheartbeat ");
     765                        heartbeat_enable = true;
     766                        if (usart_rx_buffer[1] == '0'){
     767                                heartbeat_enable = false;
     768                                usart_write_str((pU08)"off\n");
     769                        } else {
     770                                usart_write_str((pU08)"on\n");
     771                        }
     772                        break;
     773                case 'G':                       // GET the Temperature channels, which are enabled
     774                        for ( U08 i=0; i<CHANNEL_BITMAP; ++i ) {
     775                                ad7719_channels_ready[i]=0;
     776                        }
     777                        break;
     778                case 'g':                       // GET the voltage/current/humidity channels, which are enabled
     779                        for ( U08 i=0; i<V_BITMAP + I_BITMAP + H_BITMAP; ++i ) {
     780                                adc_channels_ready[i]=0;
     781                        }
     782                        break;
     783                case 's':
     784                        usart_write_char('\n');
     785                        for (U08 i=0; i< CHANNEL_BITMAP;++i) {
     786                                usart_write_U08_bin(ad7719_enables[i]);
     787                                usart_write_char('\t');
     788                        }
     789                        usart_write_char('\n');
     790                        for (U08 i=0; i< CHANNEL_BITMAP;++i){
     791                                usart_write_U08_bin(ad7719_channels_ready[i]);
     792                                usart_write_char('\t');
     793                        }
     794                        usart_write_char('\n');
     795                                usart_write_U32_hex(local_ms);
     796                        break;                 
     797        }
     798        usart_write_str((pU08)"\nready?");
     799        for (U08 i=0; i<USART_RX_BUFFER_SIZE; ++i)
     800                usart_rx_buffer[i] = 0;
     801}
     802
     803void check_if_measured_all() {
     804        adc_measured_all = true;
     805        for ( U08 i=0; i<V_BITMAP + I_BITMAP + H_BITMAP; ++i ) {
     806                if ((adc_enables[i] ^ adc_channels_ready[i]) != 0x00) {
     807                        adc_measured_all = false;
     808                        break;
     809                }
     810        }
     811        ad7719_measured_all = true;
     812        for ( U08 i=0; i<CHANNEL_BITMAP; ++i ) {
     813                if ((ad7719_enables[i] ^ ad7719_channels_ready[i]) != 0x00) {
     814                        ad7719_measured_all = false;
     815                        break;
     816                }
     817        }
     818
     819
     820}

  • firmware/FSC/src/ad7719_adc.c

    r10106 r10109  
    66//-----------------------------------------------------------------------------
    77
    8 void adc_init(void)
     8void ad7719_init(void)
    99{
    10 
    11   SET_BIT(ADC_DDR,DDD4);                // ADC_RST is uP Output
    12   CLR_BIT(ADC_PRT,ADC_RST);             // Reset ADC (active low)       
    13   SET_BIT(ADC_PRT,ADC_RST);             // Stop Reset ADC
    14 
    15 
    16         //Init Configure and Initialize AD7719
    17         //http://designtools.analog.com/dt/adc/codegen/ad7719.html
    18 
    19   U8  IOCON1 = 0xC3;    // power switches P1 and P2 switch to PWRGND. I-sources I1 and I2 are switched on.
    20   U8  IOCON2 = 0x08;    // 0x08 makes no sense... P4 is set HIGH, but is no output.
    21 //  U8  FILTER = 0x45;  //0x45 global use 50Hz = -66dB and 60Hz = -117dB Rejectjon
    22   U8  FILTER = 0x52;    //0x52 euro use 50Hz = -171dB and 60Hz = -58dB Rejectjon Updaterate = 4Hz
    23 
    24   U8  AD1CON = 0x51;   
    25         // ARN bit is set->AUS ADC range is: +-REFIN2
    26         // ACHo and ACH2 are set --> not defined. ???
    27         // AD1EN is not set. so aux ADC is not enabled anyway.
    28 
    29   U8  AD0CON = 0x8E;
    30         // AD0EN is set. main ADC operates according to content of mode register
    31         // U/#B is set. unipolar encoding. zero is 0x000000. both full scales will be 0xFFFFFF
    32         // RN2..0 = 1 ,1 ,0 --> multiplication factor 8, maybe ??
    33 
    34   U8  MODE   = 0x02;    // single conversion
    3510
    3611        // ADC communiaction works like this:
    … …  
    4621        // A3-A0 denote the address of the next register.
    4722
    48   const U8 WR_TO_IOCON = 0x07;
    49   const U8 WR_TO_FILTER = 0x04;
    50   const U8 WR_TO_AD1CON = 0x03;
    51   const U8 WR_TO_AD0CON = 0x02;
    52   const U8 WR_TO_MODE = 0x01;
    53   const U8 RD_FROM_FILTER = 0x44;
     23 
     24  CLR_BIT(ADC_PRT,ADC_RST);             // Reset ADC (active low)       
     25  SET_BIT(ADC_PRT,ADC_RST);             // Stop Reset ADC
     26
     27
     28  CLR_BIT(PORTD,SPI_AD_CS);                     // Set CS low
     29  spi_transfer_byte(FILTER_RD); // Next Operation is write to IOCON
     30  SET_BIT(PORTD,SPI_AD_CS);
     31
     32_delay_us(50);
     33
     34  CLR_BIT(PORTD,SPI_AD_CS);                     // Set CS low
     35  spi_transfer_byte(0); // Next Operation is write to IOCON
     36  SET_BIT(PORTD,SPI_AD_CS);
     37
     38_delay_us(50);
     39
     40  CLR_BIT(PORTD,SPI_AD_CS);                     // Set CS low
     41  spi_transfer_byte(IOCON_WR); // Next Operation is write to IOCON
     42  SET_BIT(PORTD,SPI_AD_CS);
     43 
     44  _delay_us(50);
     45
     46  CLR_BIT(PORTD,SPI_AD_CS);
     47  spi_transfer_byte(IOCON_INIT_HIGH);   // Write to IOCON1
     48  SET_BIT(PORTD,SPI_AD_CS);
     49_delay_us(50);
     50  CLR_BIT(PORTD,SPI_AD_CS);
     51  spi_transfer_byte(IOCON_INIT_LOWBYTE);        // Write to IOCON2
     52  SET_BIT(PORTD,SPI_AD_CS);     // Set CS high
     53
     54_delay_us(50);
    5455
    5556  CLR_BIT(PORTD,SPI_AD_CS);     // Set CS low
    56   spi_transfer_byte(RD_FROM_FILTER);            // Next Operation is write to IOCON1 and IOCON2  Start SPI
    57   spi_transfer_byte(0xFF);      // Next Operation is write to IOCON1 and IOCON2  Start SPI
     57  spi_transfer_byte(FILTER_WR);         // Next Operation is write to FILTER  Start SPI
     58  SET_BIT(PORTD,SPI_AD_CS);
     59
     60_delay_us(50);
     61  CLR_BIT(PORTD,SPI_AD_CS);
     62
     63  spi_transfer_byte(FILTER_INIT);       // Write to FILTER
     64  SET_BIT(PORTD,SPI_AD_CS);     // Set CS high
     65_delay_us(50);
     66  CLR_BIT(PORTD,SPI_AD_CS);     // Set CS low
     67  spi_transfer_byte(AD1CON_WR);         // Next Operation is write to AD1CON  Start SPI
     68  SET_BIT(PORTD,SPI_AD_CS);
     69
     70_delay_us(50);
     71
     72  CLR_BIT(PORTD,SPI_AD_CS);
     73  spi_transfer_byte(AD1CON_INIT);       // Write to AD1CON
    5874  SET_BIT(PORTD,SPI_AD_CS);     // Set CS high
    5975
     76_delay_us(50);
     77
     78  CLR_BIT(PORTD,SPI_AD_CS);     // Set CS low
     79  spi_transfer_byte(AD0CON_WR);         // Next Operation is write to AD0CON  Start SPI
     80  SET_BIT(PORTD,SPI_AD_CS);
     81
     82_delay_us(50);
     83
     84  CLR_BIT(PORTD,SPI_AD_CS);
     85  spi_transfer_byte(AD0CON_INIT);       // Write to AD0CON
     86  SET_BIT(PORTD,SPI_AD_CS);     // Set CS high
     87
     88_delay_us(50);
     89
     90  CLR_BIT(PORTD,SPI_AD_CS);     // Set CS low
     91  spi_transfer_byte(MODE_WR);           // Next Operation is write to MODE Start SPI
     92  SET_BIT(PORTD,SPI_AD_CS);
     93
     94_delay_us(50);
     95
     96  CLR_BIT(PORTD,SPI_AD_CS);
     97  spi_transfer_byte(MODE_CONT);         // Write to MODE
     98  SET_BIT(PORTD,SPI_AD_CS);     // Set CS high
     99
     100_delay_us(50);
     101
     102  CLR_BIT(PORTD,SPI_AD_CS);                     // Set CS low
     103  spi_transfer_byte(FILTER_RD); // Next Operation is write to IOCON
     104  SET_BIT(PORTD,SPI_AD_CS);
     105
     106_delay_us(50);
     107
     108  CLR_BIT(PORTD,SPI_AD_CS);                     // Set CS low
     109  spi_transfer_byte(0); // Next Operation is write to IOCON
     110  SET_BIT(PORTD,SPI_AD_CS);
     111
     112_delay_us(50);
    60113
    61114
    62 
    63   CLR_BIT(PORTD,SPI_AD_CS);     // Set CS low
    64   spi_transfer_byte(WR_TO_IOCON);       // Next Operation is write to IOCON1 and IOCON2  Start SPI
    65   SET_BIT(PORTD,SPI_AD_CS);     // Set CS high
    66 
    67   CLR_BIT(PORTD,SPI_AD_CS);     // Set CS low
    68   spi_transfer_byte(IOCON1);    // Write to IOCON1
    69   spi_transfer_byte(IOCON2);    // Write to IOCON2
    70   SET_BIT(PORTD,SPI_AD_CS);     // Set CS high
    71 
    72   CLR_BIT(PORTD,SPI_AD_CS);     // Set CS low
    73   spi_transfer_byte(WR_TO_FILTER);      // Next Operation is write to FILTER  Start SPI
    74   SET_BIT(PORTD,SPI_AD_CS);     // Set CS high
    75  
    76   CLR_BIT(PORTD,SPI_AD_CS);     // Set CS low
    77   spi_transfer_byte(FILTER);    // Write to FILTER
    78   SET_BIT(PORTD,SPI_AD_CS);     // Set CS high
    79 
    80   CLR_BIT(PORTD,SPI_AD_CS);     // Set CS low
    81   spi_transfer_byte(WR_TO_AD1CON);      // Next Operation is write to AD1CON  Start SPI
    82   SET_BIT(PORTD,SPI_AD_CS);     // Set CS high
    83  
    84   CLR_BIT(PORTD,SPI_AD_CS);     // Set CS low
    85   spi_transfer_byte(AD1CON);    // Write to AD1CON
    86   SET_BIT(PORTD,SPI_AD_CS);     // Set CS high
    87 
    88   CLR_BIT(PORTD,SPI_AD_CS);     // Set CS low
    89   spi_transfer_byte(WR_TO_AD0CON);      // Next Operation is write to AD0CON  Start SPI
    90   SET_BIT(PORTD,SPI_AD_CS);     // Set CS high
    91  
    92   CLR_BIT(PORTD,SPI_AD_CS);     // Set CS low
    93   spi_transfer_byte(AD0CON);    // Write to AD0CON
    94   SET_BIT(PORTD,SPI_AD_CS);     // Set CS high
    95 
    96   CLR_BIT(PORTD,SPI_AD_CS);     // Set CS low
    97   spi_transfer_byte(WR_TO_MODE);        // Next Operation is write to MODE Start SPI
    98   SET_BIT(PORTD,SPI_AD_CS);     // Set CS high
    99  
    100   CLR_BIT(PORTD,SPI_AD_CS);     // Set CS low
    101   spi_transfer_byte(MODE);      // Write to MODE
    102   SET_BIT(PORTD,SPI_AD_CS);     // Set CS high
    103115}
    104116         
    105  void startconv(void)
    106   {
    107     U8 COM = 0x01;
    108         U8 SERIAL = 0x02;
     117void startconv(U08 continuous)
     118{
    109119        CLR_BIT(PORTD,SPI_AD_CS);       // Set CS low
    110         spi_transfer_byte(COM);        // Next Operation is write to Mode Register
    111         spi_transfer_byte(SERIAL);       // Start new A/D conversion
     120        spi_transfer_byte(MODE_WR);        // Next Operation is write to Mode Register
     121  SET_BIT(PORTD,SPI_AD_CS);
     122  CLR_BIT(PORTD,SPI_AD_CS);
     123        if (continuous) spi_transfer_byte(MODE_SINGLE);  // Start new A/D conversion
     124        else spi_transfer_byte(MODE_CONT);       // Start continous conversion mode
    112125        SET_BIT(PORTD,SPI_AD_CS); 
    113         COM = 0x45;
     126}
     127
     128void stopconv(void)
     129{
    114130        CLR_BIT(PORTD,SPI_AD_CS);       // Set CS low
    115         spi_transfer_byte(COM);        // Next Operation is read from Main ADC Data Register
    116         SET_BIT(PORTD,SPI_AD_CS);        // Set CS high
    117   }
     131        spi_transfer_byte(MODE_WR);        // Next Operation is write to Mode Register
     132    SET_BIT(PORTD,SPI_AD_CS);
     133    CLR_BIT(PORTD,SPI_AD_CS);
     134        spi_transfer_byte(MODE_IDLE);
     135        SET_BIT(PORTD,SPI_AD_CS); 
     136}
    118137
    119  U32 read_adc(void)
    120  { CLR_BIT(PORTD,SPI_AD_CS);    // Set CS low
    121    U32 value=0;                                         // actually a 24bit value is returned
    122    value |= spi_transfer_byte(0) ;
    123    value =value<<8;
    124    value |= spi_transfer_byte(0) ;
    125    value =value<<8;
    126    value |= spi_transfer_byte(0) ;
    127    SET_BIT(PORTD,SPI_AD_CS);    // Set CS high
    128    return value;                                                                                                 
    129  }   
     138
     139U32 read_adc(void)
     140{
     141        CLR_BIT(PORTD,SPI_AD_CS);       // Set CS low
     142        spi_transfer_byte(AD0DAT_RD);   // Next Operation is read from Main ADC Data Register
     143    SET_BIT(PORTD,SPI_AD_CS);
     144        _delay_us(50);
     145
     146    CLR_BIT(PORTD,SPI_AD_CS);
     147        U32 value=0;                                    // actually a 24bit value is returned
     148        value |= spi_transfer_byte(0) ;
     149        value =value<<8;
     150        value |= spi_transfer_byte(0) ;
     151        value =value<<8;
     152        value |= spi_transfer_byte(0) ;
     153        SET_BIT(PORTD,SPI_AD_CS);       // Set CS high
     154        return value;                                                                                                 
     155}   
    130156 
    131157 

  • firmware/FSC/src/ad7719_adc.h

    r10102 r10109  
    1010#define ADC_RDY PD6
    1111#define ADC_RST PD7
    12 #define ADC_IS_READY() !(PIND & (1<<PD6)) // TRUE if PD6=0 AD_RDY is inverted logic.
     12#define AD7719_IS_READY() (!(PIND & (1<<PD6))) // TRUE if PD6=0 AD_RDY is inverted logic.
    1313
    1414// Port Definitions
    … …  
    1717#define ADC_PIN PIND
    1818
    19 void adc_init(void);
    20 void startconv(void);
     19
     20// ON CHIP REGISTER ADDRESSES
     21#define STATUS_RD 0x40
     22
     23#define MODE_WR 0x01
     24#define MODE_RD 0x41
     25
     26#define AD0CON_WR 0x02
     27#define AD0CON_RD 0x42
     28
     29#define AD1CON_WR 0x03
     30#define AD1CON_RD 0x43
     31
     32#define FILTER_WR 0x04
     33#define FILTER_RD 0x44
     34
     35#define AD0DAT_RD 0x45
     36#define AD1DAT_RD 0x46
     37
     38#define IOCON_WR 0x07
     39#define IOCON_RD 0x47
     40
     41#define AD0OFS_WR 0x08
     42#define AD0OFS_RD 0x48
     43
     44#define AD1OFS_WR 0x09
     45#define AD1OFS_RD 0x49
     46
     47#define AD0GAIN_WR 0x0A
     48#define AD0GAIN_RD 0x4A
     49
     50#define AD1GAIN_WR 0x0B
     51#define AD1GAIN_RD 0x4B
     52
     53#define ID_RD 0x4F
     54
     55// REGISTER INIT VALUES
     56
     57        //Init Configure and Initialize AD7719
     58        //http://designtools.analog.com/dt/adc/codegen/ad7719.html
     59
     60#define IOCON_INIT_HIGH 0x03    //0000.0011 // I-sources I1 and I2 are switched on, thats all
     61#define IOCON_INIT_LOWBYTE 0x00
     62
     63#define FILTER_INIT 0x52        //0x52 euro use 50Hz = -171dB and 60Hz = -58dB Rejectjon Updaterate = 4Hz
     64                                                                                        // 0x52=82 decimal. f_ADC=16.6Hz; t_ADC=60ms; t_settle = 120ms
     65
     66#define AD1CON_INIT 0x31        //0011.0001     
     67        // AD1EN is set --> AUX ADc is used for Temp measurement.
     68        // ACH = 011 --> Tempsensor
     69        // U/#B = 0 --> bipolar, but i'm not entirely sure if this is correct.
     70        // ARN = 1 --> input range is REFIN2 , but when tempsensor is chosen, internal ref is used ...
     71
     72#define AD0CON_INIT 0x8E // 1000.1110
     73        // AD0EN is set
     74        // WL is cleared --> 24bit
     75        // CH = 00 --> AIN1 , AIN2 used
     76        // U/#B = 1 --> unipolar
     77        // RN=110 --> input range = +-1.28V --> whatever this means in ratiometric measurements.
     78
     79
     80#define MODE_IDLE 0x01
     81#define MODE_SINGLE 0x02
     82#define MODE_CONT 0x03
     83#define MODE_INTERNAL_ZERO_CAL 0x04             // not tested
     84#define MODE_INTERNAL_FULL_CAL 0x05             // not tested
     85
     86// since the ADC is chopped, one should wait 3 conversions
     87// after the muxer was switched, until the reading is okay.
     88#define READINGS_UNTIL_AD7719_SETTLED 3
     89
     90void ad7719_init(void);
     91void startconv(U08 continuous);
     92void stopconv(void);
    2193U32 read_adc(void);
    2294//-----------------------------------------------------------------------------

  • firmware/FSC/src/application.c

    r10108 r10109  
    44 #include <avr/wdt.h>
    55
    6 //
    76
    87//-----------------------------------------------------------------------------
    … …  
    1615  MCUSR = 0x00; // Clear reset source for next reset cycle
    1716
     17
     18        // Dangerous here: I still do not know much about the watchdog.
     19        // This code is still from Udo Juerss.
     20
    1821  // The watchdog timer is disabled by default ("startup.asm")
    19 #ifdef USE_WATCHDOG
    20  WDTCSR = WDTOE | (1 << WDE); // Enable watchdog reset (~16ms)
    21 #endif
    22  
    23 #ifndef F_CPU
    24 #define F_CPU 8000000UL //cpu frequency
    25 #endif
     22        #ifdef USE_WATCHDOG
     23         WDTCSR = WDTOE | (1 << WDE); // Enable watchdog reset (~16ms)
     24        #endif
    2625
    27 //#ifdef (F_CPU == 16000000UL)
    28 /*#else
    29   #warning *** Compiling for _MCU_CLOCK_FREQUENCY_ Hz
    30   #error *** Invalid clock selected! ***
    31 #endif*/
    32  // Tell the user the operating frequency
    33 //#warning *** Compiling for DF_CPU Hz
    34 /*
    35   // Set selected CPU clock
    36 #if (_MCU_CLOCK_FREQUENCY_ == 16000000)
    37   CLKPR = CLKPCE; // Enable clock prescaler by writing 0x80 to CLKPR
    38   CLKPR = 0; // Set clock prescaler to division by 1 (16MHz clock with 16MHz crystal)
    39 #elif (_MCU_CLOCK_FREQUENCY_ == 8000000)
    40   CLKPR = CLKPCE; // Enable clock prescaler by writing 0x80 to CLKPR
    41   CLKPR = 1; // Set clock prescaler to division by 2 (8MHz clock with 16MHz crystal)
    42 #elif (_MCU_CLOCK_FREQUENCY_ == 4000000)
    43   CLKPR = CLKPCE; // Enable clock prescaler by writing 0x80 to CLKPR
    44   CLKPR = 2; // Set clock prescaler to division by 4 (4MHz clock with 16MHz crystal)
    45 #elif (_MCU_CLOCK_FREQUENCY_ == 2000000)
    46   CLKPR = CLKPCE; // Enable clock prescaler by writing 0x80 to CLKPR
    47   CLKPR = 3; // Set clock prescaler to division by 8 (2MHz clock with 16MHz crystal)
    48 #elif (_MCU_CLOCK_FREQUENCY_ == 1000000)
    49   CLKPR = CLKPCE; // Enable clock prescaler by writing 0x80 to CLKPR
    50   CLKPR = 4; // Set clock prescaler to division by 16 (1MHz clock with 16MHz crystal)
    51 #else
    52   #warning *** Compiling for _MCU_CLOCK_FREQUENCY_ Hz
    53   #error *** Invalid clock selected! ***
    54 #endif
     26        // define PORTS
     27        // USART
     28        DDRD &= ~(1<<PD0);                              // PD0 = RXD is input
     29        DDRD |= 1<<PD1;                                         // PD1 = TXD is output
     30       
    5531
    56   // Tell the user the operating frequency
    57 #warning *** Compiling for _MCU_CLOCK_FREQUENCY_ Hz
     32        // SPARE OUT/-INPUTS
     33        DDRB |= (1<<PB2) | (1<<PB3);    // set Out1_spare & out2_spare as outputs
     34        DDRA &= ~(1<<PA7);                              // set In1_spare as input
     35        DDRC &= ~(1<<PC7);                              // set In2_spare as input
     36        PORTA |= (1<<PA7);                              // swtich on pullup on In1_spare
     37        PORTC |= (1<<PC7);                              // swtich on pullup on In2_spare
    5838
    59 */
     39        // ATmega internal ADC input
     40        DDRA &= ~(1<<PA6);
    6041
    61 /* (ATmega32 has no prescaler)
    62   // Set selected CPU clock
    63 #if (F_CPU == 16000000)
    64   CLKPR = CLKPCE; // Enable clock prescaler by writing 0x80 to CLKPR
    65   CLKPR = 0; // Set clock prescaler to division by 1 (16MHz clock with 16MHz crystal)
    66 #elif (F_CPU == 8000000)
    67   CLKPR = CLKPCE; // Enable clock prescaler by writing 0x80 to CLKPR
    68   CLKPR = 1; // Set clock prescaler to division by 2 (8MHz clock with 16MHz crystal)
    69 #elif (F_CPU == 4000000)
    70   CLKPR = CLKPCE; // Enable clock prescaler by writing 0x80 to CLKPR
    71   CLKPR = 2; // Set clock prescaler to division by 4 (4MHz clock with 16MHz crystal)
    72 #elif (F_CPU == 2000000)
    73   CLKPR = CLKPCE; // Enable clock prescaler by writing 0x80 to CLKPR
    74   CLKPR = 3; // Set clock prescaler to division by 8 (2MHz clock with 16MHz crystal)
    75 #elif (F_CPU == 1000000)
    76   CLKPR = CLKPCE; // Enable clock prescaler by writing 0x80 to CLKPR
    77   CLKPR = 4; // Set clock prescaler to division by 16 (1MHz clock with 16MHz crystal)
    78 #else
    79   #warning *** Compiling for F_CPU Hz
    80   #error *** Invalid clock selected! ***
    81 #endif
     42        // MUXER ADDRESS OUTs
     43        DDRA |= 0x3F; // SA-pins -> output
     44        DDRC |= 0x7F; // SB-pins -> output
     45
     46        // SPI
     47        // set all CS's: output
     48        DDRB |= (1 << SPI_E_CS);
     49        DDRD |= (1 << SPI_AD_CS) |(1 << SPI_M_CS) |(1 << SPI_A_CS);
     50
     51        // set all Chips selects HIGH
     52        PORTB |= (1 << SPI_E_CS);
     53        PORTD |= (1 << SPI_AD_CS) |(1 << SPI_M_CS) |(1 << SPI_A_CS);
     54
     55        // set MOSI and SCK: output & // set MISO: input
     56        SPI_DDR |= (1 << SPI_MOSI);
     57        SPI_DDR |= (1 << SPI_SCLK);
     58        SPI_DDR &= ~(1 << SPI_MISO);
     59
     60        // set MOSI, SCK: HIGH. MISO leave alone.
     61        SPI_PRT |= (1 << SPI_MOSI);
     62        SPI_PRT |= (1 << SPI_SCLK);
     63        SPI_PRT |= (1 << SPI_MISO);
     64
     65        // ADC
     66        DDRD &= ~(1<<PD6);                                      // PD6 is AD_READY input
     67        DDRD |= 1<<PD7;                                                 // PD7 is AD_RESET output
     68
     69        // ACCELEROMETER
     70        DDRD &= ~(1<<PD2);                                      // PD2 is ACC_READY input
     71
     72        //MAX6662   <--- not assembled anymore
     73        // DDRB &= ~(1<<PB0);                   // PB0 is over temperature alert input
     74        // DDRB &= ~(1<<PB1);                           // PB1 is general temperature altert input
    8275
    8376
    84 
    85   // Tell the user the operating frequency
    86 #warning *** Compiling for F_CPU Hz
    87 
    88  
    89   // Turn off unused modules for this application
    90   PRR =
    91   (
    92 #ifndef USE_TWI
    93     TWEN // I2C module
    94   #warning *** Module "TWI" not enabled!
    95 #endif
    96 
    97  (ATmega32 Can't disable TIMER modules)
    98 #ifndef USE_TIMER2
    99     | PRTIM2 // Timer2
    100   #warning *** Module "TIMER2" not enabled!
    101 #endif
    102 #ifndef USE_TIMER1
    103     | PRTIM1 // Timer1
    104   #warning *** Module "TIMER1" not enabled!
    105 #endif
    106 #ifndef USE_TIMER0
    107     | PRTIM0 // Timer0
    108   #warning *** Module "TIMER0" not enabled!
    109 #endif
    110 
    111 #ifndef USE_USART0
    112     | PRUSART0 // USART0
    113   #warning *** Module "USART0" not enabled!
    114 #endif
    115 
    116 #ifndef USE_SPI
    117     | SPE // SPI
    118   #warning *** Module "SPI" not enabled!
    119 #endif
    120 
    121 #ifndef USE_ADC
    122     | ADEN // ADC
    123   #warning *** Module "ADC" not enabled!
    124 #endif
    125   );
    126 
    127 #ifndef USE_ACO // Analog comparator
    128   ACSR = ACME;
    129   #warning *** Module "ACO" not enabled!
    130 #endif
    131 
    132   PORTC |= PC6; // Enable pullup for PC6_RESET
    133 
    134   // Initialize switches S1, S2 and S3
    135   //S1_INIT(); // Set S1 pin to input
    136   //S2_INIT(); // Set S2 pin to input
    137   //S3_INIT(); // Set S3 pin to input
    138 */
    13977}
    14078

  • firmware/FSC/src/application.h

    r10102 r10109  
    66//-----------------------------------------------------------------------------
    77
    8 //#define F_CPU (_MCU_CLOCK_FREQUENCY_)
    9 #define F_CPU_KHZ (F_CPU / 1000)
    10 #define F_CPU_MHZ (F_CPU_KHZ / 1000)
    11 //-----------------------------------------------------------------------------
    12 
    13 // Definitions of hardware modules used by application
    14 // Comment out all unused hardware modules
    15 
    16 //#define USE_TWI // I2C module used?
    17 //#define USE_TIMER2 // Timer2 used?
    18 //#define USE_TIMER1 // Timer1 used?
    19 //#define USE_TIMER0 // Timer0 used?
    20 //#define USE_SPI // SPI used?
    21 //#define USE_USART // USART0 used?
    22 //#define USE_ADC // ADC used?
    23 //#define USE_ACO // Analog Comparator used?
    24 //#define USE_WATCHDOG // Comment out to disable watchdog timer
    25 //-----------------------------------------------------------------------------
    26 
    27 // USART0 definitions
    28 #define USART_RX_BUFFER_SIZE 64 // Receive buffer size
     8#define USART_RX_BUFFER_SIZE 32 // Receive buffer size
     9#define USART_TX_BUFFER_SIZE 255 // Receive buffer size. MUST not be larger 255
    2910
    3011#define USART_BAUDRATE 9600 // USART baudrate original
    31 
    3212#define USART_USE_TX // Transmitter used?
    3313#define USART_USE_RX // Receiver used?
    34 #define USART_USE_RX_IRQ // RX interrupt used?
     14//#define USART_USE_RX_IRQ // RX interrupt used?
    3515#define USART_USE_UPPERCASE // Convert received chars to uppercase?
    3616//-----------------------------------------------------------------------------
    3717
     18// SPI DEFINITIONS
     19// Port Definitions
     20#define SPI_PRT PORTB
     21#define SPI_DDR DDRB
     22
     23// Bit Definitions
     24#define SPI_SCLK PB7
     25#define SPI_MOSI PB5
     26#define SPI_MISO PB6
     27
     28#define SPI_E_CS PB4           
     29#define SPI_AD_CS PD3           
     30#define SPI_M_CS PD4           
     31#define SPI_A_CS PD5           
     32
     33
     34
     35
     36//-----------------------------------------------------------------------------
    3837extern volatile U08 app_reset_source;
    3938//-----------------------------------------------------------------------------

  • firmware/FSC/src/spare_outs.c

    r10094 r10109  
    1 #include "spare_outs.h"
    2 #include <avr/io.h>
    3 
    4 void spare_outs_init(void)
    5 {
    6         DDRB |= (1<<PB2) | (1<<PB3);    // set Out1_spare & out2_spare as outputs
    7 
    8         DDRA &= ~(1<<PA7);                              // set In1_spare as input
    9         DDRC &= ~(1<<PC7);                              // set In2_spare as input
    10         PORTA |= (1<<PA7);                              // swtich on pullup on In1_spare
    11         PORTC |= (1<<PC7);                              // swtich on pullup on In2_spare
    12 
    13 }

  • firmware/FSC/src/spare_outs.h

    r10094 r10109  
    1 #ifndef __SPARE_OUTS_H
    2 #define __SPARE_OUTS_H
    3 
    4 void spare_outs_init(void);
    5 
    6 #endif //__SPARE_OUTS_H

  • firmware/FSC/src/spi_master.c

    r10102 r10109  
    2020void spi_init(void)
    2121{
    22 
    23 // set all CS's: output
    24 DDRB |= (1 << SPI_E_CS);
    25 DDRD |= (1 << SPI_AD_CS) |(1 << SPI_M_CS) |(1 << SPI_A_CS);
    26 
    27 // set all Chips selects HIGH
    28 PORTB |= (1 << SPI_E_CS);
    29 PORTD |= (1 << SPI_AD_CS) |(1 << SPI_M_CS) |(1 << SPI_A_CS);
    30 
    31 // set MOSI and SCK: output & // set MISO: input
    32 SPI_DDR |= (1 << SPI_MOSI);
    33 SPI_DDR |= (1 << SPI_SCLK);
    34 SPI_DDR &= ~(1 << SPI_MISO);
    35 
    36 // set MOSI, SCK: HIGH. MISO leave alone.
    37 SPI_PRT |= (1 << SPI_MOSI);
    38 SPI_PRT |= (1 << SPI_SCLK);
    39 SPI_PRT |= (1 << SPI_MISO);
    40 
    41 
    42 
    43   spi_clock_index = 4;  // Set Clockindex for lowest clock speed (F_CPU / 128)
    44   spi_dord = 0;                                 // Data Order MSB first dord = 0
    45   spi_cpol = 1;                 
    46   spi_cpha = 1;                                 // mode=3 needed by ADC ... lets see whats next.
     22  // there are a total of 4 devices on the SPI bus:
     23        // 1.) Ethernet Modul WIZ812MJ
     24        // 2.) AD7719 24bit ADC
     25        // 3.) LIS3LV accelerometer
     26        // 4.) MAX6662 temp sensor <---- not assembled!
     27
     28        // We check if they all can live with the same SPI settings:
     29        // 1.) Ethernet modul:
     30        // supports spi mode=0 or mode=3 --> eighther cpol=cpha=0 or cpol=cpha=1
     31        // MSB first
     32        // SCLK time 70ns minimum --> 14.2MHz maximum
     33        //
     34        // 2.) AD7719
     35        // supports mode=3 --> cpol=cpha=1
     36        // MSB first
     37        // SCLK time 200ns minimum --> 5MHz maximum
     38        //
     39        // 3.) LIS3LV
     40        // SPI CLK idles high                           --> cpol=1
     41        // data valid at rising edge. --> cpha=1 as well
     42        // ==> mode 3 is supported only.
     43        // MSB first, but take take at multi byte transfers. LSbyte first
     44        // SCLK time - is not mentioned in the datasheet
     45        //
     46        // 4.) MAX6662 Tempsensor
     47        // since it is not assembled, this information is not necessary.
     48
     49        // fastes SPI CLK frequency can be                                      --> F_CPU/2     = 4MHz
     50        // slowest can be                                                                                                       --> F_CPU/128   = 62.5KHz
     51       
     52        // Lets try with the fastest!
     53        spi_clock_index = 0;  // Set Clockindex for lowest clock speed (F_CPU / 128)
     54
     55  spi_dord = 0;                                 // Data Order MSB first dord = 0  --> good for all devices
     56  spi_cpol = 1; spi_cpha = 1;                                   // SPI mode=3                   --> good for all devices
    4757  spi_setup();                                  // Setup SPI bits and clock speed
    4858

  • firmware/FSC/src/spi_master.h

    r10102 r10109  
    77#include "usart.h"
    88//-----------------------------------------------------------------------------
    9 
    10 // Port Definitions
    11 #define SPI_PRT PORTB
    12 #define SPI_DDR DDRB
    13 
    14 // Bit Definitions
    15 #define SPI_SCLK PB7
    16 #define SPI_MOSI PB5
    17 #define SPI_MISO PB6
    18 // #define SPI_SS        PB4  // not in this application!!! danger
    19 #define SPI_E_CS PB4            //device 0
    20 #define SPI_AD_CS PD3           //device 1
    21 #define SPI_M_CS PD4            //device 2
    22 #define SPI_A_CS PD5            //device 3
    23 
    249#define SPI_READ_BUFFER_SIZE 16
    2510#define SPI_WRITE_BUFFER_SIZE 16
    2611
    27 #define SPI_MAX_SLAVE_INDEX 2
    28 #define SPI_MAX_CLOCK_INDEX 6
    29 
     12#define SPI_MAX_SLAVE_INDEX 2 //?
     13#define SPI_MAX_CLOCK_INDEX 6 //?
    3014//-----------------------------------------------------------------------------
    31 
    3215extern volatile U08 spi_clock_index;
    3316extern volatile U08 spi_cpol;

  • firmware/FSC/src/typedefs.h

    r10094 r10109  
    9393typedef U08 BOOL;
    9494typedef BOOL *pBOOL;
     95typedef U08 bool;
    9596
    9697//typedef U08 __flash *fpU08; //geht nicht mit gcc

  • firmware/FSC/src/usart.c

    r10094 r10109  
    22
    33#include "usart.h"
    4 
    54#include <avr/interrupt.h>
    65//-----------------------------------------------------------------------------
    … …  
    4645void usart_write_char(U08 data)
    4746{
    48   while (!(UCSRA & (1 << UDRE))) ; // Wait until tx register is empty
    49 
    50   UDR = data;
     47//  while (!(UCSRA & (1 << UDRE))) ; // Wait until tx register is empty
     48//  UDR = data;
     49
     50        if ( usart_tx_buffer_index < USART_TX_BUFFER_SIZE-1){
     51                usart_tx_buffer[usart_tx_buffer_index] = data;
     52                ++usart_tx_buffer_index;
     53        } else {
     54                usart_tx_buffer_overflow = true;
     55        }
    5156}
    5257//-----------------------------------------------------------------------------
    … …  
    167172ISR(SIG_USART_RECV)
    168173{
    169         if (ISR_toggle_out) PORTB ^= (1<<PB3); // toggle Out2_spare when starting ISR
     174  if (ISR_toggle_out) PORTB ^= (1<<PB3); // toggle Out2_spare when starting ISR
    170175
    171176  usart_receive_char = UDR;
    … …  
    227232    usart_writeln_str(usart_rx_buffer);
    228233  }
    229 #endif
     234
    230235  //usart_write_char(usart_rx_buffer[usart_rx_buffer_index]);
    231236 //usart_writeln_str(usart_rx_buffer);
    … …  
    235240 //usart_write_char(usart_rx_buffer);
    236241} 
    237 
     242#endif
    238243/*
    239244#define uart_maxstrlen 64

  • firmware/FSC/src/usart.h

    r10094 r10109  
    2020                                ((U32)br * 16) - 1))
    2121//-----------------------------------------------------------------------------
    22 
     22/*
    2323extern U08 usart_rx_buffer[];
    2424extern volatile BOOL usart_rx_ready;
    2525extern volatile BOOL ISR_toggle_out;
    2626extern U08 usart_received_chars;
     27*/
     28extern bool usart_tx_buffer_overflow;
     29extern U08 usart_tx_buffer_index;
     30extern U08 usart_tx_buffer[USART_TX_BUFFER_SIZE];
    2731//-----------------------------------------------------------------------------
    2832
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