用L298N驱动直流电机问题

罗密欧呀 · 发表于 2017-4-28 13:26:02

我硬件连线正常，在主函数内单独让俩电机正转，或者只反转，或者都停止，都可正常实现，但是编程让电机正转几秒（用的延时函数）然后再调用反转的程序，实验结果是电机只正转不反转，实验多次得到的结果是哪个状态在程序的前面电机就怎么转，不改变想要的转的状态。请问大神们这是怎么回事啊

275891381 · 发表于 2017-4-28 13:26:03

之前遇到过，l298是5v的pwm和数字引脚正反都正常，用3.3v pwm和数字引脚只会一个方向，后来用三极管，使能5v的pwm和数字引脚就正常了

罗密欧呀 · 发表于 2017-4-28 13:29:49

#include "stm32f10x.h"
#include "motor.h"
#include "sys.h"

//×óÂÖ3õê¼»ˉ

void MotorDriver_L_Config(void){

GPIO_InitTypeDef GPIO_InitStructure ;
TIM_TimeBaseInitTypeDef TIM_BaseInitStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;

/*ê1ÄüGPIOB¡￠TIM4íaéèê±Öó*/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_TIM1, ENABLE);

/*3õê¼»ˉPB6¶Ë¿úÎaOut_PPÄ￡ê½*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);

/*3õê¼»ˉPB8¶Ë¿úÎaOut_PPÄ￡ê½*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_Init(GPIOB, &GPIO_InitStructure);

/*3õê¼»ˉPA7¶Ë¿ú(TIM4_CH2)ÎaAF_PPÄ￡ê½íÆíìêä3ö*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);

/*¶¨ê±Æ÷»ù±¾ÅäÖÃtime3 μÄ ch2í¨μà*/
TIM_BaseInitStructure.TIM_Prescaler = 3-1; //ê±ÖóÔ¤·ÖÆμêy3,TIM8μÄ¼Æêyê±ÖóÆμÂêÎa24MHz
TIM_BaseInitStructure.TIM_Period = 1000-1; //×Ô¶ˉÖØ×°ÔØ¼Ä′æÆ÷êyÖμ,PWM2ÆμÂêÎa24MHz/1000=24KHz
TIM_BaseInitStructure.TIM_ClockDivision = 0; //2éÑù·ÖÆμ
TIM_BaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up; //ÏòéÏ¼Æêy
TIM_TimeBaseInit(TIM1, &TIM_BaseInitStructure);

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; /*PWM2 ch2êä3öÄ￡ê&#189

WMÄ￡ê½2￡- ÔúÏòéÏ¼Æêyê±￡¬
ò»μ©TIMx_CNT<TIMx_CCR1ê±í¨μà1ÎaÎTD§μçÆ½￡¬·ñÔòÎa
óDD§μçÆ½￡»ÔúÏòÏÂ¼Æêyê±￡¬ò»μ©TIMx_CNT>TIMx_CCR1ê±í¨μà1ÎaóDD§μçÆ½
￡¬·ñÔòÎaÎTD§μçÆ½¡￡*/
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //ê1Äü¸Ãí¨μàêä3ö
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //êä3ö¼«DÔ
TIM_OC4Init(TIM1, &TIM_OCInitStructure); //°′Ö¸¶¨2Îêy3õê¼»ˉ

TIM_OC4PreloadConfig(TIM8, TIM_OCPreload_Enable); //ê1ÄüTIM8ÔúCCRéÏμÄÔ¤×°ÔØ¼Ä′æÆ÷
TIM_ARRPreloadConfig(TIM1, ENABLE); //ê1ÄüTIM8ÔúARRéÏμÄÔ¤×°ÔØ¼Ä′æÆ÷

TIM_Cmd(TIM1, ENABLE); //ê1ÄüTIM8
}

//óòÂÖ3õê¼»ˉ
void MotorDriver_R_Config(void){

GPIO_InitTypeDef GPIO_InitStructure ;
TIM_TimeBaseInitTypeDef TIM_BaseInitStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;

/*ê1ÄüGPIOc¡￠TIM8íaéèê±Öó*/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC  | RCC_APB2Periph_TIM8, ENABLE);

/*3õê¼»ˉPB10¶Ë¿úÎaOut_PPÄ￡ê½*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);

/*3õê¼»ˉPB.111¶Ë¿úÎaOut_PPÄ￡ê½*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_Init(GPIOC, &GPIO_InitStructure);

/*3õê¼»ˉPC.09¶Ë¿ú(TIM8_CH4)ÎaAF_PPÄ￡ê½*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);

/*¶¨ê±Æ÷»ù±¾ÅäÖÃtime8 μÄ ch4í¨μà*/
TIM_BaseInitStructure.TIM_Prescaler = 3-1; //ê±ÖóÔ¤·ÖÆμêypsc=3,TIM8μÄ¼Æêyê±ÖóÆμÂêÎa24MHz
TIM_BaseInitStructure.TIM_Period = 1000-1; //×Ô¶ˉÖØ×°ÔØ¼Ä′æÆ÷êyÖμarr=1000,PWM2ÆμÂêÎa24MHz/1000=24KHz
TIM_BaseInitStructure.TIM_ClockDivision = 0; //2éÑù·ÖÆμ
TIM_BaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up; //ÏòéÏ¼Æêy
TIM_TimeBaseInit(TIM8, &TIM_BaseInitStructure);

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //PWM2  ch2êä3öÄ￡ê½
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //ê1Äü¸Ãí¨μàêä3ö
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //êä3ö¼«DÔ
TIM_OC4Init(TIM8, &TIM_OCInitStructure); //°′Ö¸¶¨2Îêy3õê¼»ˉ

TIM_OC4PreloadConfig(TIM8, TIM_OCPreload_Enable); //ê1ÄüTIM8ÔúCCRéÏμÄÔ¤×°ÔØ¼Ä′æÆ÷
TIM_ARRPreloadConfig(TIM8, ENABLE); //ê1ÄüTIM8ÔúARRéÏμÄÔ¤×°ÔØ¼Ä′æÆ÷

TIM_Cmd(TIM8, ENABLE); //′ò¿aTIM8
}

void MotorDriver_L_Turn_Forward(void){ //×óÂÖμç»úÕy×a

IN1=1;
IN2=0;

}

void MotorDriver_L_Turn_Reverse(void){ //×óÂÖμç»ú·′×a

IN1=0;
IN2=1;

}

void MotorDriver_R_Turn_Forward(void){ //óòÂÖμç»úÕy×a

IN3=1;
IN4=0;
}

void MotorDriver_R_Turn_Reverse(void){ //óòÂÖμç»ú·′×a

IN3=0;
IN4=1;
}

void MotorDriver_L_Turn_Stop(void) //×óÂÖμç»úÖÆ¶ˉ
{
IN1=0;
IN2=0;
}
void MotorDriver_R_Turn_Stop(void) //óòÂÖμç»úÖÆ¶ˉ
{
  IN3=0;
IN4=0;
}

void MotorDriver_Init(void){

MotorDriver_R_Config();
MotorDriver_L_Config();

MotorDriver_L_Turn_Stop(); //×óÂÖμç»úÖÆ¶ˉ
MotorDriver_R_Turn_Stop(); //óòÂÖμç»úÖÆ¶ˉ
}