STM32 LL库 TIM3定时器多通道捕获输入采集
为什么不用HAL库，使用HAL库捕获输入一个通道还尚可，多通道捕获由于HAL的回调函数不符合我的要求，干脆直接切换到LL库。网上找了许多，代码处理写的不符合我的要求，这里记录一下我的调试过程。
TIM2输出1路PWM信号，使用1分3杜邦线接到TIM3的CH2-CH3-CH4通道进行捕获输入。
#include "tim.h"
/* TIM2 init function */
void MX_TIM2_Init(void)
{
LL_TIM_InitTypeDef TIM_InitStruct = {0};
LL_TIM_OC_InitTypeDef TIM_OC_InitStruct = {0};
LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
/* Peripheral clock enable */
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_TIM2);
TIM_InitStruct.Prescaler = 63;
TIM_InitStruct.CounterMode = LL_TIM_COUNTERMODE_UP;
TIM_InitStruct.Autoreload = 9999;
TIM_InitStruct.ClockDivision = LL_TIM_CLOCKDIVISION_DIV1;
LL_TIM_Init(TIM2, &TIM_InitStruct);
LL_TIM_DisableARRPreload(TIM2);
LL_TIM_SetClockSource(TIM2, LL_TIM_CLOCKSOURCE_INTERNAL);
LL_TIM_OC_EnablePreload(TIM2, LL_TIM_CHANNEL_CH2);
TIM_OC_InitStruct.OCMode = LL_TIM_OCMODE_PWM1;
TIM_OC_InitStruct.OCState = LL_TIM_OCSTATE_DISABLE;
TIM_OC_InitStruct.OCNState = LL_TIM_OCSTATE_DISABLE;
TIM_OC_InitStruct.CompareValue = 5000;
TIM_OC_InitStruct.OCPolarity = LL_TIM_OCPOLARITY_HIGH;
LL_TIM_OC_Init(TIM2, LL_TIM_CHANNEL_CH2, &TIM_OC_InitStruct);
LL_TIM_OC_DisableFast(TIM2, LL_TIM_CHANNEL_CH2);
LL_TIM_SetTriggerOutput(TIM2, LL_TIM_TRGO_RESET);
LL_TIM_DisableMasterSlaveMode(TIM2);
/* USER CODE BEGIN TIM2_Init 2 */
/* USER CODE END TIM2_Init 2 */
LL_IOP_GRP1_EnableClock(LL_IOP_GRP1_PERIPH_GPIOB);
/**TIM2 GPIO Configuration
PB3 ------> TIM2_CH2
*/
GPIO_InitStruct.Pin = LL_GPIO_PIN_3;
GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
GPIO_InitStruct.Alternate = LL_GPIO_AF_2;
LL_GPIO_Init(GPIOB, &GPIO_InitStruct);
//-------------------------------------------
LL_TIM_OC_SetCompareCH2(TIM2,2000);
LL_TIM_CC_EnableChannel(TIM2,LL_TIM_CHANNEL_CH2);
LL_TIM_EnableCounter(TIM2);
}
/* TIM3 init function */
void MX_TIM3_Init(void)
{
LL_TIM_InitTypeDef TIM_InitStruct = {0};
LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
/* Peripheral clock enable */
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_TIM3);
LL_IOP_GRP1_EnableClock(LL_IOP_GRP1_PERIPH_GPIOA);
LL_IOP_GRP1_EnableClock(LL_IOP_GRP1_PERIPH_GPIOB);
/**TIM3 GPIO Configuration
PA7 ------> TIM3_CH2
PB0 ------> TIM3_CH3
PB1 ------> TIM3_CH4
*/
GPIO_InitStruct.Pin = LL_GPIO_PIN_7;
GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
GPIO_InitStruct.Alternate = LL_GPIO_AF_1;
LL_GPIO_Init(GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.Pin = LL_GPIO_PIN_0;
GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
GPIO_InitStruct.Alternate = LL_GPIO_AF_1;
LL_GPIO_Init(GPIOB, &GPIO_InitStruct);
GPIO_InitStruct.Pin = LL_GPIO_PIN_1;
GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;
GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
GPIO_InitStruct.Alternate = LL_GPIO_AF_1;
LL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* TIM3 interrupt Init */
NVIC_SetPriority(TIM3_IRQn, 0);
NVIC_EnableIRQ(TIM3_IRQn);
/* USER CODE BEGIN TIM3_Init 1 */
/* USER CODE END TIM3_Init 1 */
TIM_InitStruct.Prescaler = 63;
TIM_InitStruct.CounterMode = LL_TIM_COUNTERMODE_UP;
TIM_InitStruct.Autoreload = 65535;
TIM_InitStruct.ClockDivision = LL_TIM_CLOCKDIVISION_DIV1;
LL_TIM_Init(TIM3, &TIM_InitStruct);
LL_TIM_DisableARRPreload(TIM3);
LL_TIM_SetClockSource(TIM3, LL_TIM_CLOCKSOURCE_INTERNAL);
LL_TIM_SetTriggerOutput(TIM3, LL_TIM_TRGO_RESET);
LL_TIM_DisableMasterSlaveMode(TIM3);
LL_TIM_IC_SetActiveInput(TIM3, LL_TIM_CHANNEL_CH2, LL_TIM_ACTIVEINPUT_DIRECTTI);
LL_TIM_IC_SetPrescaler(TIM3, LL_TIM_CHANNEL_CH2, LL_TIM_ICPSC_DIV1);
LL_TIM_IC_SetFilter(TIM3, LL_TIM_CHANNEL_CH2, LL_TIM_IC_FILTER_FDIV1);
LL_TIM_IC_SetPolarity(TIM3, LL_TIM_CHANNEL_CH2, LL_TIM_IC_POLARITY_RISING);
LL_TIM_IC_SetActiveInput(TIM3, LL_TIM_CHANNEL_CH3, LL_TIM_ACTIVEINPUT_DIRECTTI);
LL_TIM_IC_SetPrescaler(TIM3, LL_TIM_CHANNEL_CH3, LL_TIM_ICPSC_DIV1);
LL_TIM_IC_SetFilter(TIM3, LL_TIM_CHANNEL_CH3, LL_TIM_IC_FILTER_FDIV1);
LL_TIM_IC_SetPolarity(TIM3, LL_TIM_CHANNEL_CH3, LL_TIM_IC_POLARITY_RISING);
LL_TIM_IC_SetActiveInput(TIM3, LL_TIM_CHANNEL_CH4, LL_TIM_ACTIVEINPUT_DIRECTTI);
LL_TIM_IC_SetPrescaler(TIM3, LL_TIM_CHANNEL_CH4, LL_TIM_ICPSC_DIV1);
LL_TIM_IC_SetFilter(TIM3, LL_TIM_CHANNEL_CH4, LL_TIM_IC_FILTER_FDIV1);
LL_TIM_IC_SetPolarity(TIM3, LL_TIM_CHANNEL_CH4, LL_TIM_IC_POLARITY_RISING);
/* USER CODE BEGIN TIM3_Init 2 */
LL_TIM_EnableIT_UPDATE(TIM3);//更新中断使能
LL_TIM_EnableIT_CC2(TIM3);//捕获通道2使能
LL_TIM_EnableIT_CC3(TIM3);//捕获通道3使能
LL_TIM_EnableIT_CC4(TIM3);//捕获通道4使能
LL_TIM_CC_EnableChannel(TIM3,LL_TIM_CHANNEL_CH2);//通道2使能
LL_TIM_CC_EnableChannel(TIM3,LL_TIM_CHANNEL_CH3);//通道3使能
LL_TIM_CC_EnableChannel(TIM3,LL_TIM_CHANNEL_CH4);//通道4使能
LL_TIM_EnableCounter(TIM3);
/* USER CODE END TIM3_Init 2 */
}
uint32_t TIM3_OverCnt = 0;
int32_t Value_Temp2 = 0;
int32_t Value_Temp3 = 0;
int32_t Value_Temp4 = 0;
uint32_t TIM3_CH2_Capture_FristValue_1;
uint32_t TIM3_CH2_Capture_FristValue_2;
uint32_t TIM3_CH2_Capture_FristValue_3;
uint32_t TIM3_CH2_Capture_HighLevel;
uint32_t TIM3_CH2_Capture_LowLevel;
uint8_t TIM3_CH2_CaptureNumber;
//uint32_t TIM3_CH2_Freq = 0;
//float TIM3_CH2_Duty = 0;
uint32_t TIM3_CH3_Capture_FristValue_1;
uint32_t TIM3_CH3_Capture_FristValue_2;
uint32_t TIM3_CH3_Capture_FristValue_3;
uint32_t TIM3_CH3_Capture_HighLevel;
uint32_t TIM3_CH3_Capture_LowLevel;
uint8_t TIM3_CH3_CaptureNumber;
//uint32_t TIM3_CH3_Freq = 0;
//float TIM3_CH3_Duty = 0;
uint32_t TIM3_CH4_Capture_FristValue_1;
uint32_t TIM3_CH4_Capture_FristValue_2;
uint32_t TIM3_CH4_Capture_FristValue_3;
uint32_t TIM3_CH4_Capture_HighLevel;
uint32_t TIM3_CH4_Capture_LowLevel;
uint8_t TIM3_CH4_CaptureNumber;
void TIM3_CallBack(void)
{
//------------------------------------------CC2
if(LL_TIM_IsActiveFlag_CC2(TIM3))
{
LL_TIM_ClearFlag_CC2(TIM3);
if(TIM3_CH2_CaptureNumber == 0)
{
TIM3_OverCnt = 0;
TIM3_CH2_CaptureNumber = 1;
// LL_TIM_SetCounter(TIM3,0);
}
else
if(TIM3_CH2_CaptureNumber == 1)
{
TIM3_CH2_Capture_FristValue_1 = LL_TIM_IC_GetCaptureCH2(TIM3); // 获取当前的捕获值. 即CCRx2
//设置下降沿触发
LL_TIM_IC_SetPolarity(TIM3,LL_TIM_CHANNEL_CH2,LL_TIM_IC_POLARITY_FALLING);
TIM3_CH2_CaptureNumber = 2;
TIM3_OverCnt = 0;
}
else
if(TIM3_CH2_CaptureNumber == 2)
{
TIM3_CH2_Capture_FristValue_2 = LL_TIM_IC_GetCaptureCH2(TIM3); // 获取当前的捕获值. 即CCRx2
if(TIM3_OverCnt >= 1)
{
TIM3_CH2_Capture_HighLevel = TIM3_OverCnt * 65535 + TIM3_CH2_Capture_FristValue_2 - TIM3_CH2_Capture_FristValue_1;
}
else
{
Value_Temp2 = TIM3_CH2_Capture_FristValue_2 - TIM3_CH2_Capture_FristValue_1;
Value_Temp2 = Value_Temp2>0?Value_Temp2:0;
TIM3_CH2_Capture_HighLevel = TIM3_OverCnt * 65535 + Value_Temp2;
}
//设置上升沿触发
LL_TIM_IC_SetPolarity(TIM3,LL_TIM_CHANNEL_CH2,LL_TIM_IC_POLARITY_RISING);
TIM3_CH2_CaptureNumber = 3;
TIM3_OverCnt = 0;
}
else
if(TIM3_CH2_CaptureNumber == 3)
{
TIM3_CH2_Capture_FristValue_3 = LL_TIM_IC_GetCaptureCH2(TIM3); // 获取当前的捕获值. 即CCRx2
if(TIM3_OverCnt >= 1)
{
TIM3_CH2_Capture_LowLevel = TIM3_OverCnt * 65535 + TIM3_CH2_Capture_FristValue_3 - TIM3_CH2_Capture_FristValue_2;
}
else
{
Value_Temp2 = TIM3_CH2_Capture_FristValue_3 - TIM3_CH2_Capture_FristValue_2;
Value_Temp2 = Value_Temp2>0?Value_Temp2:0;
TIM3_CH2_Capture_LowLevel = TIM3_OverCnt * 65535 + Value_Temp2;
}
// //设置 沿触发
LL_TIM_IC_SetPolarity(TIM3,LL_TIM_CHANNEL_CH2,LL_TIM_IC_POLARITY_FALLING);
TIM3_CH2_CaptureNumber = 4;
TIM3_OverCnt = 0;
}
else
if(TIM3_CH2_CaptureNumber == 4)
{
// //设置 沿触发
LL_TIM_IC_SetPolarity(TIM3,LL_TIM_CHANNEL_CH2,LL_TIM_IC_POLARITY_RISING);
TIM3_CH2_CaptureNumber = 1;
TIM3_OverCnt = 0;
}
}
//------------------------------------------CC3
if(LL_TIM_IsActiveFlag_CC3(TIM3))
{
LL_TIM_ClearFlag_CC3(TIM3);
if(TIM3_CH3_CaptureNumber == 0)
{
TIM3_OverCnt = 0;
TIM3_CH3_CaptureNumber = 1;
// LL_TIM_SetCounter(TIM3,0);
}
else
if(TIM3_CH3_CaptureNumber == 1)
{
TIM3_OverCnt = 0;
TIM3_CH3_Capture_FristValue_1 = LL_TIM_IC_GetCaptureCH3(TIM3); // 获取当前的捕获值. 即CCRx2
//设置下降沿触发
LL_TIM_IC_SetPolarity(TIM3,LL_TIM_CHANNEL_CH3,LL_TIM_IC_POLARITY_FALLING);
TIM3_CH3_CaptureNumber = 2;
}
else
if(TIM3_CH3_CaptureNumber == 2)
{
TIM3_CH3_Capture_FristValue_2 = LL_TIM_IC_GetCaptureCH3(TIM3); // 获取当前的捕获值. 即CCRx2
if(TIM3_OverCnt >= 1)
{
TIM3_CH3_Capture_HighLevel = TIM3_OverCnt * 65535 + TIM3_CH3_Capture_FristValue_2 - TIM3_CH3_Capture_FristValue_1;
}
else
{
Value_Temp3 = TIM3_CH3_Capture_FristValue_2 - TIM3_CH3_Capture_FristValue_1;
Value_Temp3 = Value_Temp3>0?Value_Temp3:0;
TIM3_CH3_Capture_HighLevel = TIM3_OverCnt * 65535 + Value_Temp3;
}
//设置上升沿触发
LL_TIM_IC_SetPolarity(TIM3,LL_TIM_CHANNEL_CH3,LL_TIM_IC_POLARITY_RISING);
TIM3_CH3_CaptureNumber = 3;
TIM3_OverCnt = 0;
}
else
if(TIM3_CH3_CaptureNumber == 3)
{
TIM3_CH3_Capture_FristValue_3 = LL_TIM_IC_GetCaptureCH3(TIM3); // 获取当前的捕获值. 即CCRx2
if(TIM3_OverCnt >= 1)
{
TIM3_CH3_Capture_LowLevel = TIM3_OverCnt * 65535 + TIM3_CH3_Capture_FristValue_3 - TIM3_CH3_Capture_FristValue_2;
}
else
{
Value_Temp3 = TIM3_CH3_Capture_FristValue_3 - TIM3_CH3_Capture_FristValue_2;
Value_Temp3 = Value_Temp3>0?Value_Temp3:0;
TIM3_CH3_Capture_LowLevel = TIM3_OverCnt * 65535 + Value_Temp3;
}
// //设置 沿触发
LL_TIM_IC_SetPolarity(TIM3,LL_TIM_CHANNEL_CH3,LL_TIM_IC_POLARITY_FALLING);
TIM3_CH3_CaptureNumber = 4;
TIM3_OverCnt = 0;
}
else
if(TIM3_CH3_CaptureNumber == 4)
{
// //设置 沿触发
LL_TIM_IC_SetPolarity(TIM3,LL_TIM_CHANNEL_CH3,LL_TIM_IC_POLARITY_RISING);
TIM3_CH3_CaptureNumber = 1;
TIM3_OverCnt = 0;
}
}
//------------------------------------------CC4
if(LL_TIM_IsActiveFlag_CC4(TIM3))
{
LL_TIM_ClearFlag_CC4(TIM3);
if(TIM3_CH4_CaptureNumber == 0)
{
TIM3_OverCnt = 0;
TIM3_CH4_CaptureNumber = 1;
// LL_TIM_SetCounter(TIM3,0);
}
else
if(TIM3_CH4_CaptureNumber == 1)
{
TIM3_OverCnt = 0;
TIM3_CH4_Capture_FristValue_1 = LL_TIM_IC_GetCaptureCH4(TIM3); // 获取当前的捕获值. 即CCRx2
//设置下降沿触发
LL_TIM_IC_SetPolarity(TIM3,LL_TIM_CHANNEL_CH4,LL_TIM_IC_POLARITY_FALLING);
TIM3_CH4_CaptureNumber = 2;
}
else
if(TIM3_CH4_CaptureNumber == 2)
{
TIM3_CH4_Capture_FristValue_2 = LL_TIM_IC_GetCaptureCH4(TIM3); // 获取当前的捕获值. 即CCRx2
if(TIM3_OverCnt >= 1)
{
TIM3_CH4_Capture_HighLevel = TIM3_OverCnt * 65535 + TIM3_CH4_Capture_FristValue_2 - TIM3_CH4_Capture_FristValue_1;
}
else
{
Value_Temp4 = TIM3_CH4_Capture_FristValue_2 - TIM3_CH4_Capture_FristValue_1;
Value_Temp4 = Value_Temp4>0?Value_Temp4:0;
TIM3_CH4_Capture_HighLevel = TIM3_OverCnt * 65535 + Value_Temp4;
}
//设置上升沿触发
LL_TIM_IC_SetPolarity(TIM3,LL_TIM_CHANNEL_CH4,LL_TIM_IC_POLARITY_RISING);
TIM3_CH4_CaptureNumber = 3;
TIM3_OverCnt = 0;
}
else
if(TIM3_CH4_CaptureNumber == 3)
{
TIM3_CH4_Capture_FristValue_3 = LL_TIM_IC_GetCaptureCH4(TIM3); // 获取当前的捕获值. 即CCRx2
if(TIM3_OverCnt >= 1)
{
TIM3_CH4_Capture_LowLevel = TIM3_OverCnt * 65535 + TIM3_CH4_Capture_FristValue_3 - TIM3_CH4_Capture_FristValue_2;
}
else
{
Value_Temp4 = TIM3_CH4_Capture_FristValue_3 - TIM3_CH4_Capture_FristValue_2;
Value_Temp4 = Value_Temp4>0?Value_Temp4:0;
TIM3_CH4_Capture_LowLevel = TIM3_OverCnt * 65535 + Value_Temp4;
}
// //设置 沿触发
LL_TIM_IC_SetPolarity(TIM3,LL_TIM_CHANNEL_CH4,LL_TIM_IC_POLARITY_FALLING);
TIM3_CH4_CaptureNumber = 4;
TIM3_OverCnt = 0;
}
else
if(TIM3_CH4_CaptureNumber == 4)
{
// //设置 沿触发
LL_TIM_IC_SetPolarity(TIM3,LL_TIM_CHANNEL_CH4,LL_TIM_IC_POLARITY_RISING);
TIM3_CH4_CaptureNumber = 1;
TIM3_OverCnt = 0;
}
}
//------------------------------------------Update
if(LL_TIM_IsActiveFlag_UPDATE(TIM3))
{
LL_TIM_ClearFlag_UPDATE(TIM3); //每次溢出时间为65536us
TIM3_OverCnt++;
}
}
#ifndef __TIM_H__
#define __TIM_H__
#ifdef __cplusplus
extern "C" {
#endif
/* Includes ------------------------------------------------------------------*/
#include "main.h"
void MX_TIM2_Init(void);
void MX_TIM3_Init(void);
void TIM3_CallBack(void);
#ifdef __cplusplus
}
#endif
#endif /* __TIM_H__ */
#include "main.h"
#include "tim.h"
#include "gpio.h"
void SystemClock_Config(void);
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_TIM2_Init();
MX_TIM3_Init();
while (1)
{
}
}
/**
* @brief This function handles TIM3 global interrupt.
*/
void TIM3_IRQHandler(void)
{
TIM3_CallBack();
}