MC03_MID_DEMO

[ysog]

demo工程:
MC0_MID_DEMO.zip
背景

• MC03Etmr没有MID模式，如何实现动态频率调整
  解决方案描述
  采用双通道协同的工作方式：
• 通道2（eTMR_CH2）：配置为PWM输出模式
• 通道5（eTMR_CH5）：配置为输出比较模式，用于产生周期中点中断
• 用周期中点中断作为同步基准点，在当前PWM周期运行至一半时，更新下一个完整周期的PWM参数，实现动态调整
  步骤
  ETMR模块配置
  PWM输出通道选择CH2,频率为10000HZ
  
  Output Compare通道选择CH5
  时钟源为FXOSC(24000000HZ)
  设置初始VAL0 VAL1值为 （240000000/100000)/2 = 1200
  
  代码
  这两个数组定义了一组PWM周期及其对应的中断触发点：
  // PWM周期值（计数器计数值）
  uint32_t eTMR_values[] = {10000, 9000, 8000, 7000, 6000, 5000, 4000, 3000, 2000, 1000};
  // 对应的中断触发点（周期一半的计数值）
  uint32_t values[] = {2400, 2667, 3000, 3429, 4000, 4800, 6000, 8000, 12000, 24000};

/* USER CODE BEGIN Header */
/* you can remove the copyright */

/*
 *  Copyright 2020-2023 Yuntu Microelectronics Co., Ltd.
 *  All rights reserved.
 * 
 *  SPDX-License-Identifier: BSD-3-Clause
 * 
 * @file main.c
 * @brief 
 * 
 */

/* USER CODE END Header */
#include "sdk_project_config.h"
/* Includes ------------------------------------------------------------------*/

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "osif.h"
#include <stdint.h>
/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
#define ETMR_INST           0
#define ETMR_CHANNEL_INDEX0 2
#define ETMR_CHANNEL_INDEX1 3

volatile uint8_t i = 0;
uint32_t eTMR_values[] = {
    10000,        
    9000,
    8000,
    7000,
    6000,
    5000,
    4000,
    3000,
    2000,
    1000
};

uint32_t values[] = {
    2400,     // 10000 -> 2400
    2667,     // 9000 -> 2667
    3000,     // 8000 -> 3000
    3429,     // 7000 -> 3429
    4000,     // 6000 -> 4000
    4800,     // 5000 -> 4800
    6000,     // 4000 -> 6000
    8000,     // 3000 -> 8000
    12000,    // 2000 -> 12000
    24000     // 1000 -> 24000
};
/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
/* USER CODE END PV */

/* Private function declare --------------------------------------------------*/
/* USER CODE BEGIN PFDC */
/* USER CODE END PFDC */
static void Board_Init(void);

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

void eTMR0_Ovf_IRQHandler(void)
{
    eTMR_DRV_ClearTofFlag(0);
}

void eTMR0_Ch4_Ch5_IRQHandler(void)
{
    /* Clear interrupt flag */
    eTMR_DRV_ClearChnFlag(0, 1 << 5);   
    if(i <= 10)
    {
        PINS_DRV_TogglePins(GPIOD, (1<<5));
        eTMR_DRV_UpdatePwmPeriod(ETMR_INST, ETMR_CHANNEL_INDEX0, eTMR_values[i]);
        eTMR0->CH[5].VAL0 = values[i] / 2;
        eTMR0->CH[5].VAL1 = values[i] / 2;
        eTMR_DRV_SetLdok(ETMR_INST);
        i++;
    }
    else
        i = 100;

   
    /* Add your code here */
}

/* USER CODE END 0 */

/**
 * @brief  The application entry point.
 * @retval int
 */
int main(void)
{
    /* USER CODE BEGIN 1 */
    /* USER CODE END 1 */ 
    Board_Init();
    /* USER CODE BEGIN 2 */
    /* PWM is generated when eTMR enable, the duty cycle is configured in the initial function */
    INT_SYS_EnableIRQ(eTMR0_Ch4_Ch5_IRQn);
    eTMR_DRV_Enable(ETMR_INST);

    /* USER CODE END 2 */

    /* Infinite loop */
    /* USER CODE BEGIN WHILE */
    while (1)
    {
        /* USER CODE END WHILE */
        /* USER CODE BEGIN 3 */
    }
    /* USER CODE END 3 */
}

static void Board_Init(void)
{
    CLOCK_SYS_Init(g_clockManConfigsArr,CLOCK_MANAGER_CONFIG_CNT,g_clockManCallbacksArr,CLOCK_MANAGER_CALLBACK_CNT);
    if(STATUS_SUCCESS != CLOCK_SYS_UpdateConfiguration(CLOCK_MANAGER_ACTIVE_INDEX,CLOCK_MANAGER_POLICY_AGREEMENT))
    {
        /* USER CODE BEGIN ERROR_HANDLER 1 */
        SystemSoftwareReset();
        /* USER CODE END ERROR_HANDLER 1 */
    }
    PINS_DRV_Init(NUM_OF_CONFIGURED_PINS0,g_pin_mux_InitConfigArr0);
    eTMR_DRV_Init(0,&ETMR_CM_Config0,&ETMR_CM_Config0_State);
    eTMR_DRV_InitPwm(0,&ETMR_PWM_Config0);
    eTMR_DRV_InitOutputCompare(0,&ETMR_OC_Config0);
}

/* USER CODE BEGIN 4 */
/* USER CODE END 4 */