Posted on May 03, 2013 at 11:15Hi
I'm having a problem with clearing the OC1, 2 and 3 references. I'm using the following code for configuring PE7 as the external trigger and for enabling the OCrefs clear:
/* Configure PE7 as External Trigger Input for clearing OCrefs of Timer 1 */
/* and enable OCref Clear for each channel */
RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_GPIOE, ENABLE);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
GPIO_Init(GPIOE, &GPIO_InitStructure);
TIM_ETRConfig(TIM1, TIM_ExtTRGPSC_OFF, TIM_ExtTRGPolarity_NonInverted, 0);
TIM_ClearOC1Ref (TIM1, TIM_OCClear_Enable);
TIM_ClearOC2Ref (TIM1, TIM_OCClear_Enable);
TIM_ClearOC3Ref (TIM1, TIM_OCClear_Enable);
Do I have something missing please?
I'm using Center-aligned Mode 2 as counter mode and PWM Mode 2 as output compare mode, to control my 3 phase motor. I need to clear the three pwm channel references when PE7 goes high.
Thanks in advance,
Terence
