GD32 PMU — 待机 RTC 唤醒

Tue, 08 Sep 2026 14:52:21 +0800

PMU — 待机 RTC 唤醒

固件库: GD32F30x_Firmware_Library V3.0.3
芯片: GD32
源文件: GD32F30x_Firmware_Library_V3.0.3/Examples/PMU/Standby_wakeup_RTC/main.c

功能简介

本示例演示 PMU 的基本用法。

完整代码

#include "gd32f30x.h"
#include "gd32f307c_eval.h"
#include "systick.h"
#include "main.h"

void led_config(void);
void rtc_configuration(void);

/* software delay to prevent the impact of Vcore fluctuations.
   It is strongly recommended to include it to avoid issues caused by self-removal. */
static void _soft_delay_(uint32_t time)
{
    __IO uint32_t i;
    for(i=0; i<time*10; i++){
    }
}

int main(void)
{
    systick_config();
    /* LED configuration and turn on all LEDs */
    led_config();
    gd_eval_led_on(LED2);
    gd_eval_led_on(LED3);
    gd_eval_led_on(LED4);
    gd_eval_led_on(LED5);
    /* delay 2s */
    delay_1ms(2000);
    /* enable PMU clock */
    rcu_periph_clock_enable(RCU_PMU);
    /* configure RTC */
    rtc_configuration();

    /* The following is to prevent Vcore fluctuations caused by frequency switching. 
       It is strongly recommended to include it to avoid issues caused by self-removal. */
    _soft_delay_(0x50);
    rcu_ahb_clock_config(RCU_AHB_CKSYS_DIV2);
    _soft_delay_(0x50);
    rcu_ahb_clock_config(RCU_AHB_CKSYS_DIV4);
    _soft_delay_(0x50);
    rcu_ahb_clock_config(RCU_AHB_CKSYS_DIV8);
    _soft_delay_(0x50);
    rcu_ahb_clock_config(RCU_AHB_CKSYS_DIV16);
    _soft_delay_(0x50);
    rcu_system_clock_source_config(RCU_CKSYSSRC_IRC8M);
    _soft_delay_(200);
    rcu_ahb_clock_config(RCU_AHB_CKSYS_DIV1);

    /* PMU enters standby mode */
    pmu_to_standbymode();

    while(1) {
    }
}

void led_config(void)
{
    gd_eval_led_init(LED2);
    gd_eval_led_init(LED3);
    gd_eval_led_init(LED4);
    gd_eval_led_init(LED5);
}

代码讲解

代码结构清晰，主要包含外设初始化配置和主循环中的功能逻辑。请结合注释理解每一步的含义。

Standby_wakeup_RTC on CLing

GD32 PMU — 待机 RTC 唤醒

PMU — 待机 RTC 唤醒

功能简介

完整代码

代码讲解