STM32F4 Timer pinE5

[remco]

Posted on March 21, 2015 at 15:28

Dear stm community,

I'm struggling with a problem that i can't get a timer to work. Im trying to get the PINE5 Timer to work.

If I read everything well it has the TIM9_CH1 timer as alternating function.

So I wrote this code: </colgroup>

PE5 P2.14

(64) 4 PE5     FT PE5 TRACED2 FSMC_A21 TIM9_CH1 DCMI_D6 void InitializeTimer() {     int period = 500;     RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM9, ENABLE);     TIM_TimeBaseInitTypeDef timerInitStructure;     timerInitStructure.TIM_Prescaler = 40000;     timerInitStructure.TIM_CounterMode = TIM_CounterMode_Up;     timerInitStructure.TIM_Period = period;     timerInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;     timerInitStructure.TIM_RepetitionCounter = 0;     TIM_TimeBaseInit(TIM9, &timerInitStructure);     TIM_Cmd(TIM9, ENABLE); } void InitializePWMChannel() {     TIM_OCInitTypeDef outputChannelInit = {0,};     outputChannelInit.TIM_OCMode = TIM_OCMode_PWM1;     outputChannelInit.TIM_Pulse = 400;     outputChannelInit.TIM_OutputState = TIM_OutputState_Enable;     outputChannelInit.TIM_OCPolarity = TIM_OCPolarity_High;     TIM_OC1Init(TIM9, &outputChannelInit);     TIM_OC1PreloadConfig(TIM9, TIM_OCPreload_Enable);     GPIO_PinAFConfig(GPIOE, GPIO_PinSource5, GPIO_AF_TIM9); } void Initializepin() {     RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE);     GPIO_InitTypeDef gpioStructure;     gpioStructure.GPIO_Pin = GPIO_Pin_5;     gpioStructure.GPIO_Mode = GPIO_Mode_AF;     gpioStructure.GPIO_Speed = GPIO_Speed_50MHz;     GPIO_Init(GPIOE, &gpioStructure); } Can someone tell me where im making a mistake, or help me in the right direction? any help would be appreciated. Greetings

[Tesla DeLorean]

Posted on March 21, 2015 at 17:34

A cursory scan suggests it's not unreasonable. The order in which you call these functions would be important, and I'd probably double check if TIM9 supports PWM or not.

[waclawek.jan]

Posted on March 23, 2015 at 07:39

Isn't the GPIOE_AFRL.AFRL5 setting missing?

[EDIT] No, I can see it now, did expect it with other GPIO-related code. JW