I have been using a PWM to power a light, switching off the pwm when the light needs to be off.
I found that using FTM2 module with output on PORTA_PCR10, I have a problem switching off the pwm and leaving the output in a known state. Sometimes it works sometimes it does not. The issue ***appears*** to be mainly present when using the debugger and not in standalone code.
Has anyone any idea what the source of the issue is? My main concern is that there might be a conflict between the trace_d0 output on the same pin (although I de-selected it). Its the only correlation I could think of between the debugger and the issue.
If another pin would be better I may have to change the hardware (yuk..)
all input appreciated,
this is part of the init code:
/* added polarity set register for inactive state*/
FTM2_POL = (uint32_t) 0x01UL;
The following code is used to switch off the light:
/*force output to inactive state*/
FTM2_OUTMASK = 1;
/*shut off counter (set source to none)*/
FTM2_SC &= ~((uint32_t)0x10UL);
/* removed - was not effective
FTM2_MODE |= (uint32_t)0x02UL;
FTM2_MODE |= (uint32_t)0x02UL;*/