STM32频率脉冲可控，驱动步进电机源码 -

#include "master_slave.h"
#include "stm32f10x.h"
/**TIM2的通道1 使用单脉冲模式 TIM2_ch1_ETR：A0
**TIM3使用门控模式输出PWM TIM3_ch1 ：A6
TIM2per、TIM3per: ARR重装值（无关紧要，后面会在此赋值）
Compare1: 比较捕获1的预装载值（固定占空比所以，所以此参数不要了） */
void Motor_Init(u16 TIM2per, u16 TIM3per)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;
TIM_OCInitTypeDef TIM_OCInitStruct;
GPIO_InitTypeDef GPIO_InitStruct;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2|RCC_APB1Periph_TIM3,ENABLE); // RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO,ENABLE); // RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP; //TIM2_ch1_ETR：A0 ， TIM3_ch1 ：A6
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_6;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStruct);
/**************TIM2工作在单脉冲模式下********************/
TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInitStruct.TIM_Prescaler = 7200; //预分配值，每100u计数一次
TIM_TimeBaseInitStruct.TIM_Period = TIM2per; //重载值
TIM_TimeBaseInit(TIM2,&TIM_TimeBaseInitStruct);
TIM_SelectOnePulseMode(TIM2,TIM_OPMode_Single);//设置TIM2在单脉冲模式下，单次触发
TIM_OC1PreloadConfig(TIM2,TIM_OCPreload_Enable);// 使能TIM2的通道1预装载寄存器
TIM_SelectOutputTrigger(TIM2,TIM_TRGOSource_OC1Ref); //脉冲输出通道1
TIM_OCInitStruct.TIM_OCMode = TIM_OCMode_PWM2;//
TIM_OCInitStruct.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStruct.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStruct.TIM_Pulse = TIM2per/2;//比较捕获1的预装载值占空比50%
TIM_OC1Init(TIM2,&TIM_OCInitStruct);
TIM_Cmd(TIM2,DISABLE);//先不使能TIM2
/****************TIM3再从模式的门控模式下的PWM输出模式**************/
TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInitStruct.TIM_Prescaler = 720;//预分频值，10us技术一次
TIM_TimeBaseInitStruct.TIM_Period = TIM3per;//重载值
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseInitStruct);
TIM_SelectSlaveMode(TIM3, TIM_SlaveMode_Gated);//TIM3为门控模式
TIM_SelectMasterSlaveMode(TIM3,TIM_MasterSlaveMode_Enable);
TIM_SelectInputTrigger(TIM3,TIM_TS_ITR1);//内部从TIM2触发
TIM_OCInitStruct.TIM_OCMode = TIM_OCMode_PWM2;
TIM_OCInitStruct.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStruct.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStruct.TIM_Pulse = TIM3per/2;//比较捕获1的预装载值占空比50%
TIM_OC1Init(TIM3,&TIM_OCInitStruct);
TIM_Cmd(TIM3,ENABLE);
}
/*****设置PWM的输出，精确输出多少频率多少个数的脉冲************/
/*****Cycle:周期，单位(us)
******Pulse_Num:脉冲个数(最大3200)
****改变TIM3的（重装载值）改变脉冲频率，固定占空比为50%
****改变TIM2的（预分频器+重装载值）改变脉冲个数 */
void TIM2_TIM3_PWM(u16 Cycle, u16 Pulse_Num)
{
u16 TIM3per = 0;
u32 Time = 0;
Time = Cycle * Pulse_Num;
Time /= 100; //预分频为7200,100us 技术一次
TIM3per = Cycle/10; //预分频为720 ,10us 技术一次
TIM_SetAutoreload(TIM2, Time-1); //设置TIM2的重装载值
TIM_SetAutoreload(TIM3, TIM3per-1); //设置TIM3的重装载值
TIM_SetCompare1(TIM3,TIM3per/2); //设置TIM3占空比为50%
TIM_Cmd(TIM2,ENABLE);
}
void TIM3_CH1_init(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;
TIM_OCInitTypeDef TIM_OCInitStruct;
GPIO_InitTypeDef GPIO_InitStruct;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2|RCC_APB1Periph_TIM3,ENABLE); // RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO,ENABLE); // RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP; //TIM2_ch1_ETR：A0 ， TIM3_ch1 ：A6
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_6;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStruct);
/**************TIM2工作在单脉冲模式下********************/
TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInitStruct.TIM_Prescaler = 7200; //预分配值，每100u计数一次
TIM_TimeBaseInitStruct.TIM_Period = 400; //重载值
TIM_TimeBaseInit(TIM2,&TIM_TimeBaseInitStruct);
TIM_SelectOnePulseMode(TIM2,TIM_OPMode_Single);//设置TIM2在单脉冲模式下，单次触发
TIM_OC1PreloadConfig(TIM2,TIM_OCPreload_Enable);// 使能TIM2的通道1预装载寄存器
TIM_SelectOutputTrigger(TIM2,TIM_TRGOSource_OC1Ref); //脉冲输出通道1
TIM_OCInitStruct.TIM_OCMode = TIM_OCMode_PWM2;//
TIM_OCInitStruct.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStruct.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStruct.TIM_Pulse = 200;//比较捕获1的预装载值占空比50%
TIM_OC1Init(TIM2,&TIM_OCInitStruct);
TIM_Cmd(TIM2,DISABLE);//先不使能TIM2
/****************TIM3再从模式的门控模式下的PWM输出模式**************/
TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInitStruct.TIM_Prescaler = 720;//预分频值，10us技术一次
TIM_TimeBaseInitStruct.TIM_Period = 200;//重载值
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseInitStruct);
TIM_SelectSlaveMode(TIM3, TIM_SlaveMode_Gated);//TIM3为门控模式
TIM_SelectMasterSlaveMode(TIM3,TIM_MasterSlaveMode_Enable);
TIM_SelectInputTrigger(TIM3,TIM_TS_ITR1);//内部从TIM2触发
TIM_OCInitStruct.TIM_OCMode = TIM_OCMode_PWM2;
TIM_OCInitStruct.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStruct.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStruct.TIM_Pulse = 100; //比较捕获1的预装载值占空比50%
TIM_OC1Init(TIM3,&TIM_OCInitStruct);
TIM_Cmd(TIM3,ENABLE);
}
void Set_F_Pulse_Num(u16 Cycle, u16 Pulse_Num)
{
}

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