TB67H450FNG\TB67H451FNG\DRV8870\DRV8871\DRV8872等 PWM调速

TB67H450FNGTB67H451FNGDRV8870DRV8871DRV8872等 PWM调速

要结合电路设计对电机控制，控制有4种情况：正转、反转、制动、停止；

正转：CHx 输出PWM 时，CHxN输出低电平；

反转：CHxN 输出PWM 时，CHx输出低电平；

制动：CHxN 和CHx输出高电平；

停止：CHxN 和CHx输出低电平；

代码用到 RT-Thread 部分函数，使用 rt_pwm_disable 禁用CHxN或CHx时都是输出高电平，网上很多使用下面几个函数实现：

TIM_Cmd(TIM3 ,DISABLE);//关闭PWM输出

TIM_ForcedOC1Config(TIM3, TIM_ForcedAction_InActive);//将PWM输出强制为低

TIM_SelectOCxM(TIM3, TIM_Channel_1, TIM_OCMode_PWM1);

TIM_CCxCmd(TIM3, TIM_Channel_1, TIM_CCx_Enable);

TIM_Cmd(GENERAL_TIM, ENABLE);//使能TIMER3，开始产生PWM

但是没法达到目的，主要是比较寄存器和计数寄存器是共用的；

经过测试对比后，直接采用设置引脚功能的方式，代码简单延时少，下面是代码：

typedef enum{_e_up_down_motor_stop = 0,                     //!< _e_up_down_motor_stop_e_up_down_motor_forward, //Forward 前进_e_up_down_motor_reverse, //Reverse 倒车_e_up_down_motor_up=_e_up_down_motor_forward,  //!< _e_up_down_motor_up_e_up_down_motor_down=_e_up_down_motor_reverse,//!< _e_up_down_motor_down_e_up_down_motor_brake //Brake 制动
} MOTOR_UP_DOWN_CTRL;///***升降电机* @param channel 0~3* @param ud* @return*/
int rc1000::up_dowm_ctrl( rt_uint8_t channel, MOTOR_UP_DOWN_CTRL ud )
{/** TB67H450FNGTB67H451FNGDRV8870DRV8871DRV8872* IN1      IN2   OUT1         OUT2           Mod*  L       L     OFF (Hi-Z)   OFF (Hi-Z)     Stop, Standby mode after 1 ms*  H       L     H            L              Forward*  L       H     L            H              Reverse*  H       H     L            L              Brake**/const int i=0;MOTOR_CTRL_UP_DOWN_CONF *motor = &motor_ctrl_up_down_config[ channel ];auto _set_pin=[]( uint32_t Pin ) {GPIO_InitTypeDef GPIO_InitStruct = {0};GPIO_InitStruct.Pin = Pin;// GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14;GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;//GPIO_MODE_AF_PP;GPIO_InitStruct.Pull = GPIO_NOPULL;GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;GPIO_InitStruct.Alternate = GPIO_AF1_TIM1;HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);};rt_pin_mode( motor->up, PIN_MODE_OUTPUT_OD );rt_pin_mode( motor->dowm, PIN_MODE_OUTPUT_OD );if(ud==_e_up_down_motor_up) { //Forward 前进rt_pin_write( motor->up, PIN_LOW );rt_pin_write( motor->dowm, PIN_LOW );_set_pin( 0x01 <<( motor->dowm - GET_PIN(E, 0) ) );} else if(ud==_e_up_down_motor_down){ //Reverse 倒车rt_pin_write( motor->up, PIN_LOW );rt_pin_write( motor->dowm, PIN_LOW );_set_pin( 0x01 <<( motor->up - GET_PIN(E, 0) ) );}else if(ud==_e_up_down_motor_brake){ //Brake 制动rt_pin_write( motor->up, PIN_HIGH );rt_pin_write( motor->dowm, PIN_HIGH );} else { //Stop, Standby 停止rt_pin_write( motor->up, PIN_LOW );rt_pin_write( motor->dowm, PIN_LOW );}return 0;
}