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PWM输出至电机 使用逻辑分析仪得到的方波波形不稳定
- 2019-09-23
void Moter_IOs_Init(void) { GPIO_InitTypeDef GPIO_InitStructure; RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA ENABLE); GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7; GPIO_Init(GPIOA &GPIO_InitStructure); GPIO_ResetBits(GPIOAGPIO_Pin_7); } void TIM13_PWM_Init(u32 arru32 psc) { GPIO_InitTypeDef GPIO_InitStructure; TIM_TimebaseInitTypeDef TIM_TimebaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM13ENABLE); RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA ENABLE); GPIO_PinAFConfig(GPIOAGPIO_PinSource6GPIO_AF_TIM13); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; GPIO_Init(GPIOA&GPIO_InitStructure); TIM_TimebaseStructure.TIM_Prescaler=psc; TIM_TimebaseStructure.TIM_CounterMode=TIM_CounterMode_Up; TIM_TimebaseStructure.TIM_Period=arr; TIM_TimebaseStructure.TIM_ClockDivision=TIM_CKD_DIV1; TIM_TimebaseInit(TIM13&TIM_TimebaseStructure); TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; TIM_OCInitStructure.TIM_Pulse = 0; TIM_OC1Init(TIM13 &TIM_OCInitStructure); TIM_OC1PreloadConfig(TIM13 TIM_OCPreload_Enable); TIM_ARRPreloadConfig(TIM13ENABLE); TIM_Cmd(TIM13 ENABLE); } u8 key; int main (void) { delay_init(72); Moter_IOs_Init(); TIM13_PWM_Init(1999941); PS2_Init(); PS2_SetInit(); while(1) { PS2_ClearData(); PS2_ReadData(); k = (((PS2_AnologData(PSS_LY))/5)*400); if(k>20000) { k=20000; } TIM_SetCompare1(TIM13k); delay_ms(50); } }
