TIM1_CH1N，TIM1_CH2N 和TIM1_CH3N 如何同时配置成输入捕获？TIM1_CH2已经配置成外部输入脉冲计数模式，求助原子哥和各位大神？

青玉更落星雨 · 发表于 2015-3-27 12:12:54

TIM1_CH1N，TIM1_CH2N 和TIM1_CH3N 如何 同时 配置成 输入捕获？TIM1_CH2已经配置成外部输入脉冲计数模式，求助原子哥和各位大神？
[/mw_shl_code]
下面是配置（TIM1_CH2）：
TIM_TimeBaseInitTypeDef   TIM_TimeBaseStructure;
	
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; 
	GPIO_Init(GPIOA, &GPIO_InitStructure); [/mw_shl_code]
TIM_DeInit(TIM1);
	TIM_TimeBaseStructure.TIM_Period = 0xFFFF;
	TIM_TimeBaseStructure.TIM_Prescaler = 0x00;
	TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;
	TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
	TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); 
	TIM_TIxExternalClockConfig(TIM1,TIM_TIxExternalCLK1Source_TI2,TIM_ICPolarity_Rising,0);
	TIM_SetCounter(TIM1, 0);
	TIM_Cmd(TIM1, ENABLE);[/mw_shl_code]

正点原子 · 发表于 2015-3-27 23:23:45

这几个通道不能设置成输入补货吧.
既然CH2已经用作脉冲计数了,你还用定时器1的通道干嘛?
换其他定时器了.

青玉更落星雨 · 发表于 2015-3-28 15:00:05

回复【2楼】正点原子:
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那TIM8_ch1、2、3、4的4个通道可以同时设置成输入捕获模式么？

正点原子 · 发表于 2015-3-28 23:11:32

回复【3楼】青玉更落星雨:
---------------------------------
可以

青玉更落星雨 · 发表于 2015-3-29 11:49:54

回复【2楼】正点原子:
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TIM1_CH1，TIM1_CH1N，TIM1_CH2N，TIM1_CH3N我是要这几个管脚都设置成对外部脉冲计数模式，TIM1_CH2已经是这样设置了（按照我说的），这四个管脚不能再用定时器设置成脉冲计数模式么？，如果不行，那用外部中断做可以么？

正点原子 · 发表于 2015-3-29 23:10:38

回复【5楼】青玉更落星雨:
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我说的是CH1,CH2,CH3,CH4
不是CH1N,CH2N,CH3N,带N的这些你得自己测试下,能不能成..

青玉更落星雨 · 发表于 2015-3-30 14:24:53

我的TIM8_ch1,2,3,4同时配置成输入捕获，出现错误，输出数据不错，跳的很快，如果只单独一路捕获，是对的，请教原子哥。。。，
ch1的输入时是1hz的方波，ch2是2hz，ch3是4hz，ch4是8hz
TIM_ICInitTypeDef  TIM1_ICInitStructure;

void TIM8_Cap_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM8, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);

GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_ResetBits(GPIOC, GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9);

TIM_TimeBaseStructure.TIM_Period = arr;
TIM_TimeBaseStructure.TIM_Prescaler = psc;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM8, &TIM_TimeBaseStructure);

TIM1_ICInitStructure.TIM_Channel = TIM_Channel_1 | TIM_Channel_2 | TIM_Channel_3 | TIM_Channel_4;
TIM1_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
TIM1_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
TIM1_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
TIM1_ICInitStructure.TIM_ICFilter = 0x00;
TIM_ICInit(TIM8, &TIM1_ICInitStructure);

NVIC_InitStructure.NVIC_IRQChannel = TIM8_CC_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

TIM_ITConfig(TIM8, TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4, ENABLE);

TIM_Cmd(TIM8, ENABLE);
}

extern u16 num_TIM8[4];
void TIM8_CC_IRQHandler(void)
{
if (TIM_GetITStatus(TIM8, TIM_IT_CC1) != RESET)
    num_TIM8[0]++;
if (TIM_GetITStatus(TIM8, TIM_IT_CC2) != RESET)
    num_TIM8[1]++;
if (TIM_GetITStatus(TIM8, TIM_IT_CC3) != RESET)
    num_TIM8[2]++;
if (TIM_GetITStatus(TIM8, TIM_IT_CC4) != RESET)
    num_TIM8[3]++;

TIM_ClearITPendingBit(TIM8, TIM_IT_CC1 | TIM_IT_CC2 | TIM_IT_CC3 | TIM_IT_CC4); //????????±ê????
}