Solved
G431 Config of input interrupt prevents timer 8 from working.
This is one that baffles me:
I set up Timer 8, and everything haasworking perfect. Then i did set up interrupt on some pins, and then the PWM signal on timer 8 stopped working.
This is what i did, so the Timer 8 stopped working:
Edit: Only with the pull UP resistor the problem does not appear.
my_GPIO_InitStruct.Pin = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2;
my_GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING_FALLING;
my_GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOC, &my_GPIO_InitStruct);
This is how i setup Timer 8:
// **************** PWM *********************
// PC6-8
// PC10-12
my_GPIO_InitStruct.Pin = GPIO_PIN_6 |
GPIO_PIN_7 |
GPIO_PIN_8 |
GPIO_PIN_10 |
GPIO_PIN_11 |
GPIO_PIN_12;
my_GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
my_GPIO_InitStruct.Pull = GPIO_NOPULL;
my_GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
HAL_GPIO_Init(GPIOC, &my_GPIO_InitStruct);
// Alternative function HIGH register
GPIOC->AFR[0] |= ( GPIO_AFRL_AFSEL6_2 | // AF4 (all)
GPIO_AFRL_AFSEL7_2);
// Alternative function LOW register
GPIOC->AFR[1] |= ( GPIO_AFRH_AFSEL8_2 | // AF4 (all)
GPIO_AFRH_AFSEL10_2 |
GPIO_AFRH_AFSEL11_2 |
GPIO_AFRH_AFSEL12_2);
SET_BIT(RCC->APB2ENR, RCC_APB2ENR_TIM8EN); // Enable TIM8 clock
CLEAR_REG(TIM8->AF1); // Disable BKIN input
CLEAR_REG(TIM8->AF2);
SET_BIT(TIM8->CR1, TIM_CR1_ARPE | // preload enable
TIM_CR1_CMS_1 // center aligned up/down (interrupt on counting up - for ADC trigger only?)
);
//TODO: check entries again for pwm
SET_BIT(TIM8->CR2, TIM_CR2_MMS2_3 | TIM_CR2_MMS2_2); // tim_oc4refc or tim_oc6refc rising edges generate pulses on tim_trgo2 for ADC trigger
//TIMx_ARR -1 ist max counter
WRITE_REG(TIM8->ARR, PWM_WIDTH); // Counter TOP
// Prescaler TIMx_PSC
WRITE_REG(TIM8->CCR1, DUTY_TO_PWM(15)); // compare value 1
WRITE_REG(TIM8->CCR2, DUTY_TO_PWM(30)); // compare value 2
WRITE_REG(TIM8->CCR3, DUTY_TO_PWM(80)); // compare value 3
WRITE_REG(TIM8->CCR4, PWM_WIDTH - ADC_TRIG_PRE_COUNT); // compare value 4 (ADC trigger)
//The UEV update event can be disabled by software by setting the UDIS bit in the TIMx_CR1
SET_BIT(TIM8->CCMR1, TIM_CCMR1_OC1M_2 | TIM_CCMR1_OC1M_1 | // pwm output compare polarity channel 1 and 2 (pwm mode 1)
TIM_CCMR1_OC2M_2 | TIM_CCMR1_OC2M_1 );
SET_BIT(TIM8->CCMR1, TIM_CCMR1_OC1PE | TIM_CCMR1_OC2PE); // preload enable ccr 1 + 2
// Default is OUTPUT !!!
// CC1S = 0 > channel output (CC1 as OUTPUT)
SET_BIT(TIM8->CCMR2, TIM_CCMR2_OC3M_2 | TIM_CCMR2_OC3M_1 | // pwm output compare polarity channel 3 and 4 (pwm mode 1)
TIM_CCMR2_OC4M_2 | TIM_CCMR2_OC4M_1 );
SET_BIT(TIM8->CCMR2, TIM_CCMR2_OC3PE | TIM_CCMR2_OC4PE); // preload enable ccr 3 + 4
SET_BIT(TIM8->CCER, TIM_CCER_CC1E | TIM_CCER_CC2E | TIM_CCER_CC3E); // compare 1 + 2 + 3 output enable
SET_BIT(TIM8->CCER, TIM_CCER_CC1NE | TIM_CCER_CC2NE | TIM_CCER_CC3NE); // compare 1 + 2 + 3 complementary output enable
// TODO: CC1P: Capture/compare 1 output polarity ????
// Load all register via Update event
SET_BIT(TIM8->EGR , 1); // (UG)
SET_BIT(TIM8->CR1, TIM_CR1_CEN); //Counter enable
SET_BIT(TIM8->BDTR, TIM_BDTR_MOE); // Connect signals to outputs (When CCxE and CCxNE are set - see also OSSR and OSSI)
WRITE_REG(TIM8->SR, 0); // Clear any int flags
I think it has something to do with the interrupt. But i dont have set up the interrupt for it yet. But when debugging, it wont go into an error handler. When i activate the pullup, then it works fine, or if i change it to just input mode.
When debugging, it does NOT get stuck somewhere in the code.