Hi all,
I'm attempting to get CCP1 working on WTIMER5 (pin PD7 on this product). Currently the counter sits at zero, it should be counting a 0 - 3.3V 10MHz crystal with the system clock running at 50MHz. I'm running TivaWare 2.1.4.178 and CCS 7.2.0.
Looking at the registers, the unlock procedure for PD7 is working and both timer A and B are enabled, I believe this is correct even though it's just timer B I want? If I'm running just timer B, do I still get a 32 bit timer and 16 bit prescaler? I've attached register values at the point I'm trying to read WTIMER5 TIMER_B value.
I've also tested using this setup with TIMER_CFG_B_PERIODIC_UP instead of TIMER_CFG_B_CAP_COUNT_UP and the periodic timer mode works fine.
// *****************
// Crystal counter
// *****************
// UNLOCK PD7
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
for(i=0; i < 50; i++);
HWREG(GPIO_PORTD_BASE + GPIO_O_LOCK) = 0x4C4F434B;
HWREG(GPIO_PORTD_BASE + GPIO_O_CR) |= GPIO_PIN_7;
for(i=0; i < 50; i++);
SysCtlPeripheralEnable(SYSCTL_PERIPH_WTIMER5);
TimerDisable(WTIMER5_BASE, TIMER_BOTH);
GPIOPinConfigure(GPIO_PD7_WT5CCP1);
GPIOPinTypeTimer(GPIO_PORTD_BASE, GPIO_PIN_7);
TimerConfigure(WTIMER5_BASE, TIMER_CFG_SPLIT_PAIR | TIMER_CFG_B_CAP_COUNT_UP);
TimerControlEvent(WTIMER5_BASE, TIMER_B, TIMER_EVENT_POS_EDGE);
TimerPrescaleSet(WTIMER5_BASE, TIMER_B, 0xFFFF);
TimerLoadSet(WTIMER5_BASE, TIMER_B, 0xFFFFFFFF);
TimerPrescaleMatchSet(WTIMER5_BASE, TIMER_B,0x0);
TimerMatchSet(WTIMER5_BASE, TIMER_B, 0x0);
TimerEnable(WTIMER5_BASE, TIMER_BOTH);
