ATSAMC21 with Harmony 3 using timers...

• ATSAMC21 with Harmony 3 using timers...
  Posted by NivagSwerdna on 17 May, 2021 23:59
• I'm trying to use TC2 to time an interval...
  
  The idea was...
  

  Code: [Select]

      TC2_Compare16bitCounterSet(0);
    TC2_CompareStart();

  // do stuff

    TC2_CompareStop();

    uint16_t timer_count = TC2_Compare16bitCounterGet();
  
  But this always gives me ZERO! 
  
  I did some experimentation and TC2_Compare16bitCounterGet always gives zero when the timer is stopped... that seems a bit weird.. could it be a silicon flaw?  I cannot see it listed in the errata.
  
  PS
  Start is essentially... TC2_REGS->COUNT16.TC_CTRLA |= TC_CTRLA_ENABLE_Msk;
  Stop is essentially.... TC2_REGS->COUNT16.TC_CTRLA &= ~TC_CTRLA_ENABLE_Msk;
  CounterGet is TC2_REGS->COUNT16.TC_CTRLBSET |= (uint8_t)TC_CTRLBSET_CMD_READSYNC; return TC2_REGS->COUNT16.TC_COUNT
  
• #1 Reply
  Posted by ataradov on 18 May, 2021 00:27
• Enabling and stopping are two separate operations. Stopping is done through the CTRLBSET.CMD = STOP (0x2).