【MSPM0G3507 系列】簡單的PWM頻率和占空比設置

引言

最近在準備電賽的一些M0的程序，作為筆記也同時會不定期分享一些有關M0方面的小知識以及M0關于測控儀表類的的一些知識。

主要代碼

點擊查看代碼

#include "ti_msp_dl_config.h"

/*
 * 函數功能：設置 PWM 頻率和占空比
 * 輸入參數：
 * frea：頻率，Hz
 * duty：占空比，0-1
 * Timer：定時器
 * Cannel：定時器通道
 */
void Set_Freq_Duty(float_t freq, float_t duty, GPTIMER_Regs * Timer, DL_TIMER_CC_INDEX Channel) {
    if (duty > 1.0f) duty = 1.0f;
    else if (duty < 0.0f) duty = 0.0f;
    uint32_t final_duty_val;
    uint32_t final_freq_val;
    final_freq_val = CPUCLK_FREQ / freq;                // 頻率換算
    DL_TimerG_setLoadValue(Timer, final_freq_val);      // 設置頻率
    final_duty_val = final_freq_val * (1.0f - duty);    // 占空比換算
    DL_TimerG_setCaptureCompareValue(Timer, final_duty_val, Channel);   // 設置占空比
}

int main(void)
{
    SYSCFG_DL_init();

    DL_TimerG_startCounter(PWM_0_INST);
    DL_TimerG_setCaptureCompareValue(PWM_0_INST, 30400, DL_TIMER_CC_0_INDEX);
    while (1) {
        if (!DL_GPIO_readPins(GPIO_BUTTON_PORT, GPIO_BUTTON_PIN_BUTTON_PIN)) {
            Set_Freq_Duty(1000.0f, 0.05, PWM_0_INST, DL_TIMER_CC_0_INDEX);
            DL_GPIO_setPins(GPIO_LED_RED_PORT, GPIO_LED_RED_PIN_LED_RED_PIN);
            DL_GPIO_setPins(GPIO_LED_BLUE_PORT, GPIO_LED_BLUE_PIN_LED_BLUE_PIN);
            DL_GPIO_setPins(GPIO_LED_GREEN_PORT, GPIO_LED_GREEN_PIN_LED_GREEN_PIN);
        } else {
            Set_Freq_Duty(500.0f, 0.05, PWM_0_INST, DL_TIMER_CC_0_INDEX);
            DL_GPIO_clearPins(GPIO_LED_RED_PORT, GPIO_LED_RED_PIN_LED_RED_PIN);
            DL_GPIO_clearPins(GPIO_LED_BLUE_PORT, GPIO_LED_BLUE_PIN_LED_BLUE_PIN);
            DL_GPIO_clearPins(GPIO_LED_GREEN_PORT, GPIO_LED_GREEN_PIN_LED_GREEN_PIN);
        }
    }
}