I want to generate 6 PWMs using channel 1 of timers 1,8,2,3,4,5. All of them are set the same way except ARR, PSC and CCR1 registers. However, it turned out that timers 2 and 3 don't have PWM signal on their pins. The content of registers for those timers are the same (checked during debugging). I also tried to initialize timers by writing directly to registers, with no luck. MCU: STM32F103RCT6. Here is the the initialization for timer 3, for example:
// ------------------------- PA6 settings ------------------------- //
RCC->APB2ENR |= RCC_APB2ENR_IOPAEN; // Port A clock (PA6 - TIM3_CH1)
GPIOA->CRL |= GPIO_CRL_MODE6; // PA6 speed MAX
GPIOA->CRL &= ~GPIO_CRL_CNF6_0; // Alternate function Push-Pull
GPIOA->CRL |= GPIO_CRL_CNF6_1;
// ------------------------- TIM3 settings ------------------------- //
RCC->APB1ENR |= RCC_APB1ENR_TIM3EN; // TIM3 clock
TIM3->CCMR1 &= ~TIM_CCMR1_OC1M_0; // PWM mode 1
TIM3->CCMR1 |= TIM_CCMR1_OC1M_1;
TIM3->CCMR1 |= TIM_CCMR1_OC1M_2;
TIM3->CCMR1 |= TIM_CCMR1_OC1PE; // enable preload register
TIM3->CR1 |= TIM_CR1_ARPE; // enable auto-reload preload register
TIM3->EGR |= TIM_EGR_UG; // generate an update
TIM3->CCER &= ~TIM_CCER_CC1P; // polarity: active HIGH
TIM3->CCER |= TIM_CCER_CC1E; // Output signal enable
TIM3->ARR = 11999; // period
TIM3->CCR1 = 5999; // pulse %
TIM3->PSC = 1; // prescaler
TIM3->CR1 |= TIM_CR1_CEN; // PWM on
I tried another STM32F103RCT6, but behaviour is the same. Is that hardware issue inside the MCU?
