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- 2016-6-2
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6金钱
参考萝卜哥的(http://www.openedv.com/forum.php ... ighlight=TIM1%2BPWM)写的,就是不出波形
如果不重映射PE9的话,PA8可以出波形,用的示波器。希望各位大神能帮我看看,万分感激,下面是代码
void tim1_pwmconfig(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_DeInit(TIM1);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource9, GPIO_AF_TIM1);//完全重映射
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOE, &GPIO_InitStructure);
TIM_TimeBaseStructure.TIM_Period = 999;
TIM_TimeBaseStructure.TIM_Prescaler = 59;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Down;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0x0;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 500;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init(TIM1, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(TIM1, ENABLE);
TIM_Cmd(TIM1, ENABLE);
TIM_CtrlPWMOutputs(TIM1, ENABLE);
}
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最佳答案
查看完整内容[请看2#楼]
问题找出来了
少了这2行代码
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; //这个对高级定时器很重要
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;//这个对高级定时器很重要
通用和高级配PWM波主要相差这3行
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set; //这个对高级定时器很重要
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;//这 ...
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