Posted on July 09, 2013 at 10:52Hello everyone,I am the new user and I need your help about an example Stm32f4- Discovery.I use TIM10 register for to get pwm.And I want to be increase duty ratio with user button.I try to change TIM10->CCR1 but its not working.What should I do for this problem??;Here is my code:
/* TIM10_PWM
* main.c
*
* Created on: 12 Agu 2012
* Author: m2k
*/
&sharpinclude ''stm32f4xx.h''
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
uint16_t PrescalerValue = 0;
void GPIO_Conf(void) {
/* GPIOB ve TIM10 CLK Kaynagi etkinlestiriliyor */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM10,ENABLE);
/* PB8 Ek �zellikler i�in ayarlaniyor */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/*Pin Y�nlendirme Islemi*/
GPIO_PinAFConfig(GPIOB,GPIO_PinSource8,GPIO_AF_TIM10);
}
void TIM_Conf(void) {
int val=0;
PrescalerValue = 140;
/* TIM10 Ayarlari Yapiliyor */
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
/* TIM10 I�in CounterMode_UP Gereksizdir. Fakat Kodu degistirip
* diger sayicilar i�in kullanma ihtimaline karsi silmiyorum */
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period = 10;
TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue;
TIM_TimeBaseInit(TIM10, &TIM_TimeBaseStructure);
/* PWM Ayarlari yapiliyor. 32KHz @ %50 */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM10->CCR1=val;
TIM_OC1Init(TIM10, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM10, TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(TIM10, ENABLE);
}
int main(void) {
int val=0;
TIM10->CCR1=val;
if(GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_0)) {
val++;
}
GPIO_Conf();
TIM_Conf();
/* TIM10 Baslatiliyor */
TIM_Cmd(TIM10, ENABLE);
while(1){
}
}
#stm32f4-discovery-timer10-duty
