GD32L233使用串口从从深度睡眠模式1唤醒

int main(void)

{

    systick_config();

 

    rcu_periph_clock_enable(RCU_GPIOA);

    gpio_mode_set(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN_8);

    gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_8 );

    /* reset LED GPIO pin */

    gpio_bit_reset(GPIOA, GPIO_PIN_8);

        

    rcu_periph_clock_enable(RCU_SYSCFG);

 

    /* USART configuration the CK_IRC16M as USART clock */

    rcu_usart_clock_config(IDX_USART1, RCU_USARTSRC_IRC16MDIV);

    gd_eval_com_init(EVAL_COM);

 

    nvic_irq_enable(USART1_WKUP_IRQn, 0);

    /* USART1 Wakeup EXTI line configuretion */

    exti_init(EXTI_26, EXTI_INTERRUPT, EXTI_TRIG_RISING);//EXTI_26 USART1唤醒

 

    delay_1ms(5000);//5S后进入低功耗

 

    /* use start bit wakeup MCU */

    usart_wakeup_mode_config(EVAL_COM, USART_WUM_STARTB);

 

    /* enable USART */

    usart_enable(EVAL_COM);

    /* ensure USART is enabled */

    while(RESET == usart_flag_get(EVAL_COM, USART_FLAG_REA)) {

    }

    /* check USART is not transmitting */

    while(SET == usart_flag_get(EVAL_COM, USART_FLAG_BSY)) {

    }

 

    usart_wakeup_enable(EVAL_COM);

    /* enable the WUIE interrupt */

    usart_interrupt_enable(EVAL_COM, USART_INT_WU);

 

        printf(" enter deep-sleep mode");

    /* enable PWU APB clock */

    rcu_periph_clock_enable(RCU_PMU);

    /* enter deep-sleep mode */

    pmu_to_deepsleepmode(PMU_LDNPDSP_NORMALDRIVE, WFI_CMD, PMU_DEEPSLEEP);

 

    /* wait a WUIE interrupt event */

    while(0x00 == counter0);

 

    /* disable USART peripheral in deepsleep mode */

    usart_wakeup_disable(EVAL_COM);

 

    while(RESET == usart_flag_get(EVAL_COM, USART_FLAG_RBNE));

    usart_data_receive(EVAL_COM);

 

    usart_receive_config(EVAL_COM, USART_RECEIVE_ENABLE);

 

    while(RESET == usart_flag_get(EVAL_COM, USART_FLAG_TC));

 

    /* disable the USART */

   // usart_disable(EVAL_COM);

 

    /* reconfigure systemclock */

    system_clock_reconfig();

 

    systick_config();

 

    while(1) {

    }

}