time3和time4的参数之间会影响啊？初始化完四定时器三的参数就变成了四的参数

wmh19910511 · 发表于 2015-10-23 00:23:20

[mw_shl_code=c,true]

[mw_shl_code=c,true]void TIM4_Int_Init(u16 arr,u16 psc) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE); //?±?????? //?¨?±?÷TIM4?????? TIM_TimeBaseStructure.TIM_Period = arr; //?è???????????ü??????×°????????×?????×°???????÷???????? TIM_TimeBaseStructure.TIM_Prescaler =psc; //?è??????×÷??TIMx?±?????????????¤·????? TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //?è???±??·???:TDTS = Tck_tim TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM?ò?????????? TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //?ù?????¨????????????TIMx???±???ù?????? TIM_ITConfig(TIM4,TIM_IT_Update,ENABLE ); //???????¨??TIM4????,???í?ü?????? //??????????NVIC?è?? NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn; //TIM3???? NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //??????????0?? NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //????????3?? NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ?¨??±????? NVIC_Init(&NVIC_InitStructure); //??????NVIC?????÷ TIM_Cmd(TIM4, DISABLE); //????TIMx } void TIM3_Int_Init(u16 arr,u16 psc) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //?±?????? //?¨?±?÷TIM3?????? TIM_TimeBaseStructure.TIM_Period = arr; //?è???????????ü??????×°????????×?????×°???????÷???????? TIM_TimeBaseStructure.TIM_Prescaler =psc; //?è??????×÷??TIMx?±?????????????¤·????? TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //?è???±??·???:TDTS = Tck_tim TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM?ò?????????? TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //?ù?????¨????????????TIMx???±???ù?????? TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE ); //???????¨??TIM3????,???í?ü?????? //??????????NVIC?è?? NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; //TIM3???? NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //??????????0?? NVIC_InitStructure.NVIC_IRQChannelSubPriority = 4; //????????3?? NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ?¨??±????? NVIC_Init(&NVIC_InitStructure); //??????NVIC?????÷ TIM_Cmd(TIM3, ENABLE); //????TIMx }[/mw_shl_code]

定时器四是在定时器三之后初始化的 [/mw_shl_code] [mw_shl_code=c,true]定时器四初始化完以后定时器三里面的arr和pse就变成了四的值了[/mw_shl_code]

[mw_shl_code=c,true]void TIM3_Int_Init(u16 arr,u16 psc) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //?±?????? //?¨?±?÷TIM3?????? TIM_TimeBaseStructure.TIM_Period = arr; //?è???????????ü??????×°????????×?????×°???????÷???????? TIM_TimeBaseStructure.TIM_Prescaler =psc; //?è??????×÷??TIMx?±?????????????¤·????? TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //?è???±??·???:TDTS = Tck_tim TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM?ò?????????? TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //?ù?????¨????????????TIMx???±???ù?????? TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE ); //???????¨??TIM3????,???í?ü?????? //??????????NVIC?è?? NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; //TIM3???? NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //??????????0?? NVIC_InitStructure.NVIC_IRQChannelSubPriority = 4; //????????3?? NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ?¨??±????? NVIC_Init(&NVIC_InitStructure); //??????NVIC?????÷ TIM_Cmd(TIM3, ENABLE); //????TIMx }[/mw_shl_code]

[mw_shl_code=c,true]void TIM3_Int_Init(u16 arr,u16 psc) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //?±?????? //?¨?±?÷TIM3?????? TIM_TimeBaseStructure.TIM_Period = arr; //?è???????????ü??????×°????????×?????×°???????÷???????? TIM_TimeBaseStructure.TIM_Prescaler =psc; //?è??????×÷??TIMx?±?????????????¤·????? TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //?è???±??·???:TDTS = Tck_tim TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM?ò?????????? TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //?ù?????¨????????????TIMx???±???ù?????? TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE ); //???????¨??TIM3????,???í?ü?????? //??????????NVIC?è?? NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; //TIM3???? NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //??????????0?? NVIC_InitStructure.NVIC_IRQChannelSubPriority = 4; //????????3?? NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ?¨??±????? NVIC_Init(&NVIC_InitStructure); //??????NVIC?????÷ TIM_Cmd(TIM3, ENABLE); //????TIMx } void TIM4_Int_Init(u16 arr,u16 psc) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE); //?±?????? //?¨?±?÷TIM4?????? TIM_TimeBaseStructure.TIM_Period = arr; //?è???????????ü??????×°????????×?????×°???????÷???????? TIM_TimeBaseStructure.TIM_Prescaler =psc; //?è??????×÷??TIMx?±?????????????¤·????? TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //?è???±??·???:TDTS = Tck_tim TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIM?ò?????????? TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //?ù?????¨????????????TIMx???±???ù?????? TIM_ITConfig(TIM4,TIM_IT_Update,ENABLE ); //???????¨??TIM4????,???í?ü?????? //??????????NVIC?è?? NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn; //TIM3???? NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //??????????0?? NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //????????3?? NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ?¨??±????? NVIC_Init(&NVIC_InitStructure); //??????NVIC?????÷ TIM_Cmd(TIM4, DISABLE); //????TIMx }[/mw_shl_code]