Index: firmware/InterlockArduino/webserver/webserver.ino =================================================================== --- firmware/InterlockArduino/webserver/webserver.ino (revision 14159) +++ firmware/InterlockArduino/webserver/webserver.ino (revision 14159) @@ -0,0 +1,355 @@ + +/* + Arduino Ethernet for FACT Interlock + + Written by Dominik Neise + June 2012 + TU Dortmund + + The FACT Camera as well as the bias voltage supply for its G-APDs + may only be switched on, if the dedicated cooling systems are running. + This arduino is connected via optocouplers to some status LEDs, + and other coolings system output signals, which show + the status of both cooling systems: + * water cooling pump + - flow meter + - level meter + * bias crate fans + - rotation frequency + A simple WebServer is implemented for showing the + status and access the actual switches. + + In order to switch on the camera one needs to switch on + the water pump first. In case this pump is running, the + Camera power suplly (51VDC Agilent) gets an enable signal + and will power the camera. + In order to enable the bias voltage supply, one needs to swtich on + the Bias Crate Fans. + + Circuit: + IL_ON : Interlock on : digital input D1 + FL_OK : level ok : digital input D2 + FC_OK : current ok : digital input D3 + FP_EN : pump enabled : digital input D4 + + FC_ON : enable pump : digital output D5 + FC_OFF: disable pump : digital output D6 + */ + +#include +#include +#define BUF_LEN 256 + +// inputs +int IL_ON = 4; +int FL_OK = 5; +int FC_OK = 6; +int FP_EN = 7; + // outputs +int FC_ON = 2; +int FC_OFF = 3; + +unsigned long last_time = millis(); +unsigned long current_time = millis(); +unsigned int fc_on_time = 0; // time in ms, for FC_ON to be HIGH +unsigned int fc_off_time = 0;// time in ms, for FC_OFF to be HIGH + +byte mac[] = { 0xFA, 0xC7, 0xFC, 0xB1, 0x00, 0x01 }; +IPAddress ip(129,217,160,65); + +// Initialize the Ethernet server library +// with the IP address and port you want to use +// (port 80 is default for HTTP): +EthernetServer server(80); + +// ethernet receive buffer + +char eth_rx_buf[BUF_LEN]; +unsigned int eth_rd = 0; +unsigned int eth_wr = 0; +byte eth_buff_full = false; + + + + +void setup() { + // Open serial communications and wait for port to open: + Serial.begin(9600); + while (!Serial) { + ; // wait for serial port to connect. Needed for Leonardo only + } + + + // start the Ethernet connection and the server: + Ethernet.begin(mac, ip); + server.begin(); + Serial.print("server is at "); + Serial.println(Ethernet.localIP()); + + pinMode( IL_ON, INPUT ); + pinMode( FL_OK, INPUT ); + pinMode( FC_OK, INPUT ); + pinMode( FP_EN, INPUT ); + + pinMode( FC_ON, OUTPUT ); + pinMode( FC_OFF,OUTPUT ); + +} + + +void loop() { + Check_n_Set_FC_ON_OFF(); + unsigned long before = millis(); + if (Check_for_clients() ) + { + unsigned long duration = millis() - before; + + Serial.println( duration, DEC); + } + + delay(300); +} +///////////////////////////////////////////////////////////////////////////////////////////// +int Check_for_clients() +{ + + int got_client = 0; + // listen for incoming clients + EthernetClient client = server.available(); + if (client) { + got_client = 1; + Serial.println("new client"); + // an http request ends with a blank line + boolean currentLineIsBlank = true; + boolean get_http_found = false; + String eth = ""; + + while (client.connected()) { + if (client.available()) { + char c = client.read(); + if (!get_http_found) + { + eth += c; +// Serial.write(c); + //Serial.println(eth.length(), DEC); + if ( eth.indexOf('\n') != -1 ) + { + if (eth.indexOf(String("GET /")) !=-1 && eth.indexOf(String("HTTP")) !=-1 ) + { + get_http_found = true; + if (eth.indexOf(String("D2on=")) !=-1){ + Serial.println("found D2on"); + digitalWrite( 2, HIGH); + fc_on_time = 3000; + } + + if (eth.indexOf(String("D2off=")) !=-1) + { + Serial.println("found D2off"); + digitalWrite( 3, HIGH); + fc_off_time = 500; + } + + Serial.println("found it"); + } + } + } + + // if you've gotten to the end of the line (received a newline + // character) and the line is blank, the http request has ended, + // so you can send a reply + if (c == '\n' && currentLineIsBlank) { + // send a standard http response header + html_header( &client ); + html_page( &client ); + html_footer( &client ); + break; // this breaks out of the while loop!!! + } + if (c == '\n') { + // you're starting a new line + currentLineIsBlank = true; + } + else if (c != '\r') { + // you've gotten a character on the current line + currentLineIsBlank = false; + } + } + } + // give the web browser time to receive the data + delay(1); + // close the connection: + client.stop(); + Serial.println("client disonnected"); + } + return got_client; +} +///////////////////////////////////////////////////////////////////////////////////////////// + +//////////// HTML Generators //////////////////////////////////////////////////////////////// +void html_header(EthernetClient *client) +{ + // send a standard http response header + client->println("HTTP/1.1 200 OK"); + client->println("Content-Type: text/html"); + client->println("Connnection: close"); + client->println(); + client->println(""); + client->println(""); + + // add a meta refresh tag, so the browser pulls again every 5 seconds: + client->print(""); + + client->println("FACT camera power interlock control"); + client->println("
"); +} + +void send_ana_outs_example( EthernetClient *client) { + // output the value of each analog input pin + for (int analogChannel = 0; analogChannel < 6; analogChannel++) + { + client->print("analog input "); + client->print(analogChannel); + client->print(" is "); + client->print(analogRead(analogChannel)); + client->println("
"); + } +} + +void send_dig_ins( EthernetClient *client) +{ + for (int ch = 4; ch < 9; ch++) + { + client->print("digital input "); + client->print(ch); + client->print(" is "); + if (digitalRead(ch)) + { + client->print("HIGH"); + } + else + { + client->print("LOW"); + } + + + + client->println("
"); + } + +} + +void html_page( EthernetClient *client) +{ + client->println("

Switches D2 HIGH for 3 seconds
"); + client->println("

Switches D3 HIGH for 0.5 seconds
"); + + send_dig_ins( client ); + + //send_ana_outs_example( client ); +} + +void html_footer(EthernetClient *client) +{ + client->print("
\n"); +} + + +//////////// HTML Generators ---- END ///////////////////////////////////////////////////////// + +void +Check_n_Set_FC_ON_OFF() +{ + Serial.print("FC ON TIME"); + Serial.println(fc_on_time); + Serial.print("FC OFF TIME"); + Serial.println(fc_off_time); + + unsigned long since_last = millis() - last_time; + + if (since_last == 0) + { + // not even a milisecond passed by + // strange, should not happen + } + else if (since_last >= fc_on_time) + { + // FC_ON was long enough HIGH + fc_on_time = 0; + } + else if (since_last < fc_on_time) + { + // fc_on_time is decreased + fc_on_time -= since_last; + } + + if (fc_on_time == 0) + { + digitalWrite( FC_ON, LOW); + } + else + { + //digitalWrite( FC_ON, HIGH); + } + + if (since_last == 0) + { + // not even a milisecond passed by + // strange, should not happen + } + else if (since_last >= fc_off_time) + { + // FC_OFF was long enough HIGH + fc_off_time = 0; + } + else if (since_last < fc_off_time) + { + // fc_on_time is decreased + fc_off_time -= since_last; + } + + if (fc_off_time == 0) + { + digitalWrite( FC_OFF, LOW); + } + else + { + //digitalWrite( FC_OFF, HIGH); + } + + last_time = millis(); +} +///////////////////////////////////////////////////////////////////////////////////////////// + + +///////////////Ethernet input buffer//////////////////////////////////////////////////////// +int eth_buf_add(char c) +{ + if (!eth_buff_full) + { + eth_rx_buf[eth_wr] = c; + eth_wr = (eth_wr+1)%BUF_LEN; + if (eth_wr == eth_rd) // buffer full + { + eth_buff_full = true; + } + return true; + } + else + { + return false; + } +} + +inline int eth_len() +{ + return (eth_wr-eth_rd) % BUF_LEN; +} + +char * buf[16]; + + + + + +///////////////////////////////////////////////////////////////////////////////////////////// +