Posted on November 10, 2017 at 09:52hi
i have a problem in pwm.
i want to generate a pwm signal by nucleo stm32f103rb board,i use keil for the compiling,
and i don't get the pwm.
this is my code :
&sharpinclude <stm32f10x.h>
TIM_TimeBaseInitTypeDef TIM_structure;
TIM_OCInitTypeDef pwm_structure;
void hse_config(void);
void timer_config(void);
void pwm_config(void);
void rcc_config(void);
void gpio_config(void);
int main() {
hse_config();
rcc_config();
gpio_config();
timer_config();
pwm_config();
while(1){
}
}
void hse_config(void) {
RCC_HSEConfig(RCC_HSE_ON);
RCC_WaitForHSEStartUp();
RCC_PLLConfig(RCC_PLLSource_HSE_Div1,RCC_PLLMul_9);
RCC_PLLCmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY==RESET));
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
}
void timer_config(void) {
TIM_structure.TIM_Prescaler=71;
TIM_structure.TIM_CounterMode=TIM_CounterMode_Up;
TIM_structure.TIM_Period=99;
TIM_structure.TIM_ClockDivision=0;
TIM_structure.TIM_RepetitionCounter=0;
TIM_TimeBaseInit(TIM2,&TIM_structure);
}
void pwm_config(void) {
pwm_structure.TIM_OCMode=TIM_OCMode_PWM1;
pwm_structure.TIM_OutputState=TIM_OutputState_Enable;
pwm_structure.TIM_Pulse=48;
pwm_structure.TIM_OCNPolarity=TIM_OCPolarity_High;
TIM_OC2Init(TIM2,&pwm_structure);
TIM_OC2PreloadConfig(TIM2,TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(TIM2,ENABLE);
TIM_Cmd(TIM2,ENABLE);
}
void rcc_config(void){
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_AFIO,ENABLE);
}
void gpio_config(void){
GPIO_InitTypeDef GPIO_structure;
GPIO_structure.GPIO_Pin=GPIO_Pin_3;
GPIO_structure.GPIO_Mode=GPIO_Mode_AF_PP;
GPIO_structure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOB,&GPIO_structure);
GPIO_PinRemapConfig(GPIO_FullRemap_TIM2,ENABLE);
}
please help me in this case.
thank you.
#pwm #nucleo-f103rb #stm32f103
