I am trying to use Timer2 (1:2) in 32-bit unchained mode to do a one-time count up to the period register value, after which I want to generate a hardware interrupt to the DSP. However, as soon as I release the counter from reset the PRDINTSTAT12 triggers and the TIM12 counter never increments from 0x00000000. What could I be doing wrong?
Here's my code.
void MyTIMER_trigger(uint32_t in_time)
{
CLRBIT(TMR2->TGCR, TIM12RS); //hold timer in reset
SETBIT(TMR2->INTCTLSTAT, PRDINTSTAT12); //clear prd int status
SETBIT(TMR2->TCR, ENAMODE12_ONETIME); //enable timer for one-time
TMR2->TIM12 = 0x00000001; //clear timer counter
TMR2->PRD12 = TICKS23_12_PER_US * in_time; //load timer period
TMR2->INTCTLSTAT = 1; //enable PRD12 interrupt
SETBIT(TMR2->TGCR, TIM12RS); //release from reset
}
And here is a snapshot of the timer registers immediately after the last step above.
TIMER64P2DSP
REVID = 0x4472020C
EMUMGT = 0x00000003
GPINTGPEN = 0x00000000
GPDATGPDIR = 0x00000000
TIM12 = 0x00000000
TIM34 = 0x10406A4E
PRD12 = 65400
PRD34 = 0xFFFFFFFF
TCR = 0x00800040
_RSVD = **
CAPEVTMODE34 = RISE (0x0)
CAPMODE34 = DISABLE (0x0)
READRSTMODE34 = CONTINUE (0x0)
TIEN34 = NOTGATED (0x0)
CLKSRC34 = INTERNAL (0x0)
ENAMODE34 = EN_CONT (0x2)
PWID34 = ONE_CLK (0x0)
CP34 = PULSE (0x0)
INVINP34 = NON_INVERTED (0x0)
INVOUTP34 = NON_INVERTED (0x0)
TSTAT34 = LOW (0x0)
_RSVD = **
CAPEVTMODE12 = RISE (0x0)
CAPMODE12 = DISABLE (0x0)
READRSTMODE12 = CONTINUE (0x0)
TIEN12 = NOTGATED (0x0)
CLKSRC12 = INTERNAL (0x0)
ENAMODE12 = EN_ONCE (0x1)
PWID12 = ONE_CLK (0x0)
CP12 = PULSE (0x0)
INVINP12 = NON_INVERTED (0x0)
INVOUTP12 = NON_INVERTED (0x0)
TSTAT12 = LOW (0x0)
TGCR = 0x0000AF07
_RSVD = ****************
TDDR34 = 0xa
PSC34 = 0xf
_RSVD = ***
PLUSEN = DISABLE (0x0)
TIMMODE = 32BIT_UNCHAIN (0x1)
TIM34RS = NO_RESET (0x1)
TIM12RS = NO_RESET (0x1)
WDTCR = 0x00000000
REL12 = 0x00000000
REL34 = 0x00000000
CAP12 = 0x00000000
CAP34 = 0x00000000
INTCTLSTAT = 0x00000003
_RSVD = *
_RSVD = *
_RSVD = **********
EVTINTSTAT34 = NOPEND (0x0)
EVTINTEN34 = DISABLE (0x0)
PRDINTSTAT34 = NOPEND (0x0)
PRDINTEN34 = DISABLE (0x0)
_RSVD = *
_RSVD = *
_RSVD = **********
EVTINTSTAT12 = NOPEND (0x0)
EVTINTEN12 = DISABLE (0x0)
PRDINTSTAT12 = PEND (0x1)
PRDINTEN12 = ENABLE (0x1)
CMP0 = 0xFFFFFFFF
CMP1 = 0xFFFFFFFF
CMP2 = 0xFFFFFFFF
CMP3 = 0xFFFFFFFF
CMP4 = 0xFFFFFFFF
CMP5 = 0xFFFFFFFF
CMP6 = 0xFFFFFFFF
CMP7 = 0xFFFFFFFF
