drv_pwm.c

/*
 * File      : drv_pwm.c
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2006 - 2018, RT-Thread Development Team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Change Logs:
 * Date           Author       Notes
 * 2018-07-15     ZYH          first version
 */
#include <rthw.h>
#include <rtthread.h>
#include <rtdevice.h>
#include <board.h>

#define MAX_PERIOD 65535 
#define MIN_PERIOD 3
#define MIN_PULSE 2

static rt_err_t drv_pwm_control(struct rt_device_pwm *device, int cmd, void *arg);
static struct rt_pwm_ops drv_ops = 
{
    drv_pwm_control
};

static rt_err_t drv_pwm_enable(TIM_HandleTypeDef * htim, struct rt_pwm_configuration *configuration, rt_bool_t enable)
{
    rt_uint32_t channel = 0x04 * configuration->channel;
    if(!enable)
    {
        HAL_TIM_PWM_Stop(htim, channel);
    }
    HAL_TIM_PWM_Start(htim, channel);
    return RT_EOK;
}

static rt_err_t drv_pwm_get(TIM_HandleTypeDef * htim, struct rt_pwm_configuration *configuration)
{
    rt_uint32_t channel = 0x04 * configuration->channel;
    rt_uint32_t tim_clock;
#if (RT_HSE_HCLK > 100000000UL)//100M
    if(htim->Instance == TIM1 && htim->Instance == TIM8)
    {
        tim_clock = SystemCoreClock;
    }
    else
    {
        tim_clock = SystemCoreClock/2;
    }
#else
    tim_clock = SystemCoreClock;
#endif
    if(__HAL_TIM_GET_CLOCKDIVISION(htim) == TIM_CLOCKDIVISION_DIV2)
    {
        tim_clock = tim_clock / 2;
    }
    else if(__HAL_TIM_GET_CLOCKDIVISION(htim) == TIM_CLOCKDIVISION_DIV4)
    {
        tim_clock = tim_clock / 4;
    }
    tim_clock /= 1000000UL;
    configuration->period = (__HAL_TIM_GET_AUTORELOAD(htim) + 1) * (htim->Instance->PSC + 1) * 1000UL / tim_clock;
    configuration->pulse = (__HAL_TIM_GET_COMPARE(htim, channel) + 1) * (htim->Instance->PSC + 1) * 1000UL / tim_clock;
    return RT_EOK;
}

static rt_err_t drv_pwm_set(TIM_HandleTypeDef * htim, struct rt_pwm_configuration *configuration)
{
    rt_uint32_t period, pulse;
    rt_uint32_t tim_clock, psc;
    rt_uint32_t channel = 0x04 * configuration->channel;
#if (RT_HSE_HCLK > 100000000UL)//100M
    if(htim->Instance == TIM1 && htim->Instance == TIM8)
    {
        tim_clock = SystemCoreClock;
    }
    else
    {
        tim_clock = SystemCoreClock/2;
    }
#else
    tim_clock = SystemCoreClock;
#endif
    tim_clock /= 1000000UL;
    period = (unsigned long long)configuration->period * tim_clock / 1000ULL ;
    psc = period / MAX_PERIOD + 1;
    period = period / psc;
    __HAL_TIM_SET_PRESCALER(htim, psc - 1);
    if(period < MIN_PERIOD)
    {
        period = MIN_PERIOD;
    }
    __HAL_TIM_SET_AUTORELOAD(htim, period - 1);
    pulse = configuration->pulse * tim_clock / psc / 1000UL;
    if(pulse < MIN_PULSE)
    {
        pulse = MIN_PULSE;
    }
    else if(pulse > period)
    {
        pulse = period;
    }
    __HAL_TIM_SET_COMPARE(htim, channel, pulse - 1 );
    return RT_EOK;
}

static rt_err_t drv_pwm_control(struct rt_device_pwm *device, int cmd, void *arg)
{
    struct rt_pwm_configuration * configuration = (struct rt_pwm_configuration *)arg;
    TIM_HandleTypeDef * htim = (TIM_HandleTypeDef *)device->parent.user_data;
    
    switch(cmd)
    {
    case PWM_CMD_ENABLE:
        return drv_pwm_enable(htim, configuration, RT_TRUE);
    case PWM_CMD_DISABLE:
        return drv_pwm_enable(htim, configuration, RT_FALSE);
    case PWM_CMD_SET:
        return drv_pwm_set(htim, configuration);
    case PWM_CMD_GET:
        return drv_pwm_get(htim, configuration);
    default:
        return RT_EINVAL;
    }
}

static void HAL_TIM_MspPostInit(TIM_HandleTypeDef* timHandle);

#ifdef BSP_USING_PWM1
TIM_HandleTypeDef htim1;
#endif
#ifdef BSP_USING_PWM2
TIM_HandleTypeDef htim2;
#endif
#ifdef BSP_USING_PWM3
TIM_HandleTypeDef htim3;
#endif
#ifdef BSP_USING_PWM4
TIM_HandleTypeDef htim4;
#endif
#ifdef BSP_USING_PWM5
TIM_HandleTypeDef htim5;
#endif

#ifdef BSP_USING_PWM1
static void MX_TIM1_Init(void)
{
    TIM_MasterConfigTypeDef sMasterConfig;
    TIM_OC_InitTypeDef sConfigOC;
    TIM_BreakDeadTimeConfigTypeDef sBreakDeadTimeConfig;

    htim1.Instance = TIM1;
    htim1.Init.Prescaler = 0;
    htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
    htim1.Init.Period = 0;
    htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
    htim1.Init.RepetitionCounter = 0;
    if (HAL_TIM_PWM_Init(&htim1) != HAL_OK)
    {
        RT_ASSERT(0);
    }

    sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
    sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
    if (HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig) != HAL_OK)
    {
        RT_ASSERT(0);
    }

    sConfigOC.OCMode = TIM_OCMODE_PWM1;
    sConfigOC.Pulse = 0;
    sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
    sConfigOC.OCNPolarity = TIM_OCNPOLARITY_HIGH;
    sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
    sConfigOC.OCIdleState = TIM_OCIDLESTATE_RESET;
    sConfigOC.OCNIdleState = TIM_OCNIDLESTATE_RESET;

#ifdef BSP_USING_PWM1_CH1
    if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
    {
        RT_ASSERT(0);
    }
#endif /* BSP_USING_PWM1_CH1 */

#ifdef BSP_USING_PWM1_CH2
    if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_2) != HAL_OK)
    {
        RT_ASSERT(0);
    }
#endif /* BSP_USING_PWM1_CH2 */

#ifdef BSP_USING_PWM1_CH3
    if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_3) != HAL_OK)
    {
        RT_ASSERT(0);
    }
#endif /* BSP_USING_PWM1_CH3 */

#ifdef BSP_USING_PWM1_CH4
    if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_4) != HAL_OK)
    {
        RT_ASSERT(0);
    }
#endif /* BSP_USING_PWM1_CH4 */

    sBreakDeadTimeConfig.OffStateRunMode = TIM_OSSR_DISABLE;
    sBreakDeadTimeConfig.OffStateIDLEMode = TIM_OSSI_DISABLE;
    sBreakDeadTimeConfig.LockLevel = TIM_LOCKLEVEL_OFF;
    sBreakDeadTimeConfig.DeadTime = 0;
    sBreakDeadTimeConfig.BreakState = TIM_BREAK_DISABLE;
    sBreakDeadTimeConfig.BreakPolarity = TIM_BREAKPOLARITY_HIGH;
    sBreakDeadTimeConfig.AutomaticOutput = TIM_AUTOMATICOUTPUT_DISABLE;

    if (HAL_TIMEx_ConfigBreakDeadTime(&htim1, &sBreakDeadTimeConfig) != HAL_OK)
    {
        RT_ASSERT(0);
    }
    HAL_TIM_MspPostInit(&htim1);
}
#endif /* BSP_USING_PWM1 */

#ifdef BSP_USING_PWM2
static void MX_TIM2_Init(void)
{
    TIM_MasterConfigTypeDef sMasterConfig;
    TIM_OC_InitTypeDef sConfigOC;

    htim2.Instance = TIM2;
    htim2.Init.Prescaler = 0;
    htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
    htim2.Init.Period = 0;
    htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
    if (HAL_TIM_PWM_Init(&htim2) != HAL_OK)
    {
        RT_ASSERT(0);
    }

    sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
    sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
    if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)
    {
        RT_ASSERT(0);
    }

    sConfigOC.OCMode = TIM_OCMODE_PWM1;
    sConfigOC.Pulse = 0;
    sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
    sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;

#ifdef BSP_USING_PWM2_CH1
    if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
    {
        RT_ASSERT(0);
    }
#endif /* BSP_USING_PWM2_CH1 */

#ifdef BSP_USING_PWM2_CH2
    if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_2) != HAL_OK)
    {
        RT_ASSERT(0);
    }
#endif /* BSP_USING_PWM2_CH2 */

#ifdef BSP_USING_PWM2_CH3
    if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_3) != HAL_OK)
    {
        RT_ASSERT(0);
    }
#endif /* BSP_USING_PWM2_CH3 */

#ifdef BSP_USING_PWM2_CH4
    if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_4) != HAL_OK)
    {
        RT_ASSERT(0);
    }
#endif /* BSP_USING_PWM2_CH3 */

    HAL_TIM_MspPostInit(&htim2);
}
#endif /* BSP_USING_PWM2 */

#ifdef BSP_USING_PWM3
void MX_TIM3_Init(void)
{
    TIM_MasterConfigTypeDef sMasterConfig;
    TIM_OC_InitTypeDef sConfigOC;

    htim3.Instance = TIM3;
    htim3.Init.Prescaler = 0;
    htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
    htim3.Init.Period = 0;
    htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
    if (HAL_TIM_PWM_Init(&htim3) != HAL_OK)
    {
        RT_ASSERT(0);
    }

    sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
    sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
    if (HAL_TIMEx_MasterConfigSynchronization(&htim3, &sMasterConfig) != HAL_OK)
    {
        RT_ASSERT(0);
    }

    sConfigOC.OCMode = TIM_OCMODE_PWM1;
    sConfigOC.Pulse = 0;
    sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
    sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
#ifdef BSP_USING_PWM3_CH1
    if (HAL_TIM_PWM_ConfigChannel(&htim3, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
    {
        RT_ASSERT(0);
    }
#endif /* BSP_USING_PWM3_CH1 */

#ifdef BSP_USING_PWM3_CH2
    if (HAL_TIM_PWM_ConfigChannel(&htim3, &sConfigOC, TIM_CHANNEL_2) != HAL_OK)
    {
        RT_ASSERT(0);
    }
#endif /* BSP_USING_PWM3_CH2 */

#ifdef BSP_USING_PWM3_CH3
    if (HAL_TIM_PWM_ConfigChannel(&htim3, &sConfigOC, TIM_CHANNEL_3) != HAL_OK)
    {
        RT_ASSERT(0);
    }
#endif /* BSP_USING_PWM3_CH3 */

#ifdef BSP_USING_PWM3_CH4
    if (HAL_TIM_PWM_ConfigChannel(&htim3, &sConfigOC, TIM_CHANNEL_4) != HAL_OK)
    {
        RT_ASSERT(0);
    }
#endif /* BSP_USING_PWM3_CH4 */

    HAL_TIM_MspPostInit(&htim3);
}
#endif /* BSP_USING_PWM3 */

#ifdef BSP_USING_PWM4
void MX_TIM4_Init(void)
{
    TIM_MasterConfigTypeDef sMasterConfig;
    TIM_OC_InitTypeDef sConfigOC;

    htim4.Instance = TIM4;
    htim4.Init.Prescaler = 0;
    htim4.Init.CounterMode = TIM_COUNTERMODE_UP;
    htim4.Init.Period = 0;
    htim4.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
    if (HAL_TIM_PWM_Init(&htim4) != HAL_OK)
    {
        RT_ASSERT(0);
    }

    sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
    sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
    if (HAL_TIMEx_MasterConfigSynchronization(&htim4, &sMasterConfig) != HAL_OK)
    {
        RT_ASSERT(0);
    }

    sConfigOC.OCMode = TIM_OCMODE_PWM1;
    sConfigOC.Pulse = 0;
    sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
    sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
#ifdef BSP_USING_PWM4_CH1
    if (HAL_TIM_PWM_ConfigChannel(&htim4, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
    {
        RT_ASSERT(0);
    }
#endif /* BSP_USING_PWM4_CH1 */

#ifdef BSP_USING_PWM4_CH2
    if (HAL_TIM_PWM_ConfigChannel(&htim4, &sConfigOC, TIM_CHANNEL_2) != HAL_OK)
    {
        RT_ASSERT(0);
    }
#endif /* BSP_USING_PWM4_CH2 */

#ifdef BSP_USING_PWM4_CH3
    if (HAL_TIM_PWM_ConfigChannel(&htim4, &sConfigOC, TIM_CHANNEL_3) != HAL_OK)
    {
        RT_ASSERT(0);
    }
#endif /* BSP_USING_PWM4_CH3 */

#ifdef BSP_USING_PWM4_CH4
    if (HAL_TIM_PWM_ConfigChannel(&htim4, &sConfigOC, TIM_CHANNEL_4) != HAL_OK)
    {
        RT_ASSERT(0);
    }
#endif /* BSP_USING_PWM4_CH4 */

    HAL_TIM_MspPostInit(&htim4);
}
#endif /* BSP_USING_PWM4 */

#ifdef BSP_USING_PWM5
void MX_TIM5_Init(void)
{
    TIM_MasterConfigTypeDef sMasterConfig;
    TIM_OC_InitTypeDef sConfigOC;

    htim5.Instance = TIM5;
    htim5.Init.Prescaler = 0;
    htim5.Init.CounterMode = TIM_COUNTERMODE_UP;
    htim5.Init.Period = 0;
    htim5.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
    if (HAL_TIM_PWM_Init(&htim5) != HAL_OK)
    {
        RT_ASSERT(0);
    }

    sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
    sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
    if (HAL_TIMEx_MasterConfigSynchronization(&htim5, &sMasterConfig) != HAL_OK)
    {
        RT_ASSERT(0);
    }

    sConfigOC.OCMode = TIM_OCMODE_PWM1;
    sConfigOC.Pulse = 0;
    sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
    sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
#ifdef BSP_USING_PWM5_CH1
    if (HAL_TIM_PWM_ConfigChannel(&htim5, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
    {
        RT_ASSERT(0);
    }
#endif /* BSP_USING_PWM5_CH1 */

#ifdef BSP_USING_PWM5_CH2
    if (HAL_TIM_PWM_ConfigChannel(&htim5, &sConfigOC, TIM_CHANNEL_2) != HAL_OK)
    {
        RT_ASSERT(0);
    }
#endif /* BSP_USING_PWM5_CH2 */

#ifdef BSP_USING_PWM5_CH3
    if (HAL_TIM_PWM_ConfigChannel(&htim5, &sConfigOC, TIM_CHANNEL_3) != HAL_OK)
    {
        RT_ASSERT(0);
    }
#endif /* BSP_USING_PWM5_CH3 */

    HAL_TIM_MspPostInit(&htim5);
}
#endif /* BSP_USING_PWM5 */

void HAL_TIM_PWM_MspInit(TIM_HandleTypeDef* tim_pwmHandle)
{
    if(tim_pwmHandle->Instance==TIM1)
    {
        __HAL_RCC_TIM1_CLK_ENABLE();
    }
    else if(tim_pwmHandle->Instance==TIM2)
    {
        __HAL_RCC_TIM2_CLK_ENABLE();
    }
    else if(tim_pwmHandle->Instance==TIM3)
    {
        __HAL_RCC_TIM3_CLK_ENABLE();
    }
    else if(tim_pwmHandle->Instance==TIM4)
    {
        __HAL_RCC_TIM4_CLK_ENABLE();
    }
    else if(tim_pwmHandle->Instance==TIM5)
    {
        __HAL_RCC_TIM5_CLK_ENABLE();
    }
}

static void HAL_TIM_MspPostInit(TIM_HandleTypeDef* timHandle)
{
    GPIO_InitTypeDef GPIO_InitStruct;
    if(timHandle->Instance==TIM1)
    {
        __HAL_RCC_GPIOA_CLK_ENABLE();
        /**TIM1 GPIO Configuration    
        PA8     ------> TIM1_CH1
        PA9     ------> TIM1_CH2
        PA10     ------> TIM1_CH3
        PA11     ------> TIM1_CH4 
        */
        GPIO_InitStruct.Pin = GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11;
        GPIO_InitStruct.Mode = 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(GPIOA, &GPIO_InitStruct);
    }
    else if(timHandle->Instance==TIM2)
    {
        __HAL_RCC_GPIOA_CLK_ENABLE();
        __HAL_RCC_GPIOB_CLK_ENABLE();
        /**TIM2 GPIO Configuration    
        PA3     ------> TIM2_CH4
        PA5     ------> TIM2_CH1
        PB10     ------> TIM2_CH3
        PB3     ------> TIM2_CH2 
        */
        GPIO_InitStruct.Pin = GPIO_PIN_3|GPIO_PIN_5;
        GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
        GPIO_InitStruct.Pull = GPIO_NOPULL;
        GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
        GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;
        HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

        GPIO_InitStruct.Pin = GPIO_PIN_10|GPIO_PIN_3;
        GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
        GPIO_InitStruct.Pull = GPIO_NOPULL;
        GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
        GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;
        HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
    }
    else if(timHandle->Instance==TIM3)
    {
        __HAL_RCC_GPIOA_CLK_ENABLE();
        __HAL_RCC_GPIOB_CLK_ENABLE();
        /**TIM3 GPIO Configuration    
        PA6     ------> TIM3_CH1
        PA7     ------> TIM3_CH2
        PB0     ------> TIM3_CH3
        PB1     ------> TIM3_CH4 
        */
        GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_7;
        GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
        GPIO_InitStruct.Pull = GPIO_NOPULL;
        GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
        GPIO_InitStruct.Alternate = GPIO_AF2_TIM3;
        HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

        GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1;
        GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
        GPIO_InitStruct.Pull = GPIO_NOPULL;
        GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
        GPIO_InitStruct.Alternate = GPIO_AF2_TIM3;
        HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
    }
    else if(timHandle->Instance==TIM4)
    {
        __HAL_RCC_GPIOB_CLK_ENABLE();
        /**TIM4 GPIO Configuration    
        PB6     ------> TIM4_CH1
        PB7     ------> TIM4_CH2
        PB8     ------> TIM4_CH3
        PB9     ------> TIM4_CH4 
        */
        GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_7|GPIO_PIN_8|GPIO_PIN_9;
        GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
        GPIO_InitStruct.Pull = GPIO_NOPULL;
        GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
        GPIO_InitStruct.Alternate = GPIO_AF2_TIM4;
        HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
    }
    else if(timHandle->Instance==TIM5)
    {
        __HAL_RCC_GPIOA_CLK_ENABLE();
        /**TIM5 GPIO Configuration    
        PA0-WKUP     ------> TIM5_CH1
        PA1     ------> TIM5_CH2
        PA2     ------> TIM5_CH3 
        */
        GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2;
        GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
        GPIO_InitStruct.Pull = GPIO_NOPULL;
        GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
        GPIO_InitStruct.Alternate = GPIO_AF2_TIM5;
        HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
    }

}

void HAL_TIM_PWM_MspDeInit(TIM_HandleTypeDef* tim_pwmHandle)
{
    if(tim_pwmHandle->Instance==TIM1)
    {
        __HAL_RCC_TIM1_CLK_DISABLE();
    }
    else if(tim_pwmHandle->Instance==TIM2)
    {
        __HAL_RCC_TIM2_CLK_DISABLE();
    }
    else if(tim_pwmHandle->Instance==TIM3)
    {
        __HAL_RCC_TIM3_CLK_DISABLE();
    }
    else if(tim_pwmHandle->Instance==TIM4)
    {
        __HAL_RCC_TIM4_CLK_DISABLE();
    }
    else if(tim_pwmHandle->Instance==TIM5)
    {
        __HAL_RCC_TIM5_CLK_DISABLE();
    }
} 
int drv_pwm_init(void)
{
#ifdef BSP_USING_PWM1
    MX_TIM1_Init();
    rt_device_pwm_register(rt_calloc(1,sizeof(struct rt_device_pwm)), "pwm1", &drv_ops, &htim1);
#endif

#ifdef BSP_USING_PWM2
    MX_TIM2_Init();
    rt_device_pwm_register(rt_calloc(1,sizeof(struct rt_device_pwm)), "pwm2", &drv_ops, &htim2);
#endif

#ifdef BSP_USING_PWM3
    MX_TIM3_Init();
    rt_device_pwm_register(rt_calloc(1,sizeof(struct rt_device_pwm)), "pwm3", &drv_ops, &htim3);
#endif

#ifdef BSP_USING_PWM4
    MX_TIM4_Init();
    rt_device_pwm_register(rt_calloc(1,sizeof(struct rt_device_pwm)), "pwm4", &drv_ops, &htim4);
#endif

#ifdef BSP_USING_PWM5
    MX_TIM5_Init();
    rt_device_pwm_register(rt_calloc(1,sizeof(struct rt_device_pwm)), "pwm5", &drv_ops, &htim5);
#endif
    return 0;
}
INIT_DEVICE_EXPORT(drv_pwm_init);