STM32f013RCT6 TIM4 PWM Output Error

[kyle young]

Posted on August 15, 2017 at 07:55

Hi,every,

i want to use the TIM4 to output PWM signal,but the PB_6 always keep low.Here is the code:

********************************************************************************************

GPIO_InitTypeDef GPIO_InitStructure;

TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;

TIM_OCInitTypeDef  TIM_OCInitStructure;RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4,ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 ;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOB, &GPIO_InitStructure);TIM_TimeBaseStructure.TIM_Period = 255;

TIM_TimeBaseStructure.TIM_Prescaler = 1999; 

TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;

TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

TIM_OCInitStructure.TIM_Pulse = 125;

TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

TIM_OC1Init(TIM4, &TIM_OCInitStructure);

TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Enable);

TIM_CtrlPWMOutputs(TIM4,ENABLE);

TIM_ARRPreloadConfig(TIM4, ENABLE);

TIM_Cmd(TIM4, ENABLE); 

************************************************************************************

Any idea why?How to solve it?

Thinks.

#stm32f103 #pwm #tim4

[kyle young]

Posted on August 15, 2017 at 09:32

i think i solved it.

SET 'GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;'

[Khouloud GARSI]

Posted on August 15, 2017 at 11:20

Hi

carlose

‌,

Thanks for sharing the solution, this will be helpful for other users on our STM32 MCUs forum.

I advise you to have a look on TIM examples available after downloading the

http://www.st.com/content/st_com/en/products/embedded-software/mcus-embedded-software/stm32-embedded-software/stm32cube-embedded-software/stm32cubef0.html

package. They will help you to have a deeper understanding about the timer peripheral.

Examples are found under the path below:

STM32Cube\Repository\STM32Cube_FW_F0_V1.8.0\Projects\...\Examples\TIM

Have a nice day

Khouloud.