N32WB031低功耗唤醒异常问题

只看该作者 · 2024-3-28 18:44

1. 近日使用N32WB031做串口低功耗唤醒验证。发现在设备进入sleep后无法被触发，但在进入sleep前，发送串口信息就可以触发串口中断。一旦进入sleep就完了。
demo 参照工程目录：N32WB301\N32WB03x_SDK_V1.3\projects\n32wb03x_EVAL\peripheral\LPUART\WakeUpFromStop\MDK-ARM
main（）的程序：
/*##-1- Wake Up second step  ###############################################*/
      printf("\n\r##-1-Start Bit Detection Wake-Up##\n\r");
      /* Set the Wake-Up Event: specify wake-up on start bit */
      LPUART_ConfigWakeUpMethod(LPUARTy, LPUART_WUSTP_STARTBIT);
      /* Enable the LPUARTx Wake UP from STOP Mode Interrupt */
      LPUART_ConfigInt(LPUARTy, LPUART_INT_WUF, ENABLE);
      /* Enable MCU Wake-up by LPUARTx */
      LPUART_EnableWakeUpStop(LPUARTy, ENABLE);

      RCC_EnableAPB1PeriphClk(RCC_APB1_PERIPH_PWR, ENABLE);

      /* Enter STOP Mode */
      PWR_EnterSLEEPMode(PWR_SLEEPENTRY_WFI);
      /* ... STOP Mode ... */
      /* Wake Up based on Start Bit Detection successful */
      LPUART_EnableWakeUpStop(LPUARTy, DISABLE);
      /* Output a message on LPUARTy using printf function */
      printf("\n\rStart bit detection wake-up successful\n\r");

   /*##-2- Wake Up second step  ###############################################*/
      printf("\n\r##-2-RXNE Detection Wake-Up##\n\r");
      /* Set the Wake-Up Event: specify wake-up on RXNE flag */
      LPUART_ConfigWakeUpMethod(LPUARTy, LPUART_WUSTP_RXNE);
      /* Enable the LPUART Wake UP from STOP Mode Interrupt */
      LPUART_ConfigInt(LPUARTy, LPUART_INT_WUF, ENABLE);
      /* Enable MCU Wake-Up by LPUARTx */
      LPUART_EnableWakeUpStop(LPUARTy, ENABLE);

      RCC_EnableAPB1PeriphClk(RCC_APB1_PERIPH_PWR, ENABLE);
      /* Enter STOP Mode */
      PWR_EnterSLEEPMode(PWR_SLEEPENTRY_WFI);
      /* ... STOP Mode ... */
      /* Wake Up based on RXNE Detection successful */
      LPUART_EnableWakeUpStop(LPUARTy, DISABLE);
      /* Output a message on Hyperterminal using printf function */
      printf("\n\rRXNE detection wake-up successful\n\r");
#else
#endif
}

只看该作者 · 2024-4-1 14:23

你这是刚唤醒就进入低功耗？