Changeset 9939 for firmware/FTU/counter

Timestamp:

09/22/10 18:08:06 (14 years ago)

Author:

weitzel

Message:

FTU RS485 interface is now connected to main control

File:

• firmware/FTU/counter/FTU_rate_counter.vhd (modified) (1 diff)

firmware/FTU/counter/FTU_rate_counter.vhd

@@ -119 +119 @@
   begin
     if rising_edge(cntr_reset) then
-      --formula to calculate counting period from prescaling value
+      --calculate counting period from prescaling value
+      --default is 0.5s - 128s if CNTR_FREQ_DIVIDER = 1
       if (prescaling = "00000000") then
         counting_period <= COUNTER_FREQUENCY / (2 * CNTR_FREQ_DIVIDER);
+      elsif (prescaling = "11111111") then
+        counting_period <= 128 * (COUNTER_FREQUENCY / CNTR_FREQ_DIVIDER);
       else
         counting_period <= ((conv_integer(unsigned(prescaling)) + 1) / 2) * (COUNTER_FREQUENCY / CNTR_FREQ_DIVIDER);