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7 years, 2 months ago.

Uart going to mbed_die after deepsleep

Hi All, i'm experiencing a problem on my custom L152RE board. My software handles 3 interrupt driven serial interfaces with callbacks. I rely on WakeUp library to wake up my board from deepsleep time to time. In my main cycle, i have something like this:

my cycle

  WakeUp::set_ms(SLEEP_TIME);
  DisableSerial();
  deepsleep();
   ReEnableSerial();

where DisableSerial() is where i reconfigure serial pins ad outputs

=

void DisableSerial(){
//Reconfigure Serial pins as outputs
DigitalOut pb10(PB_10);
DigitalOut pb11(PB_11);
DigitalOut pa9(PA_9);
DigitalOut pa10(PA_10);
DigitalOut pa2(SERIAL_TX);
DigitalOut pa3(SERIAL_RX);

//pull down to save power before sleeping
pb10=0;
pb11=0;
pa9=0;
pa10=0;
pa2=0;
pa3=0;

and ReEnableSerial() is where i reinitialize the serial ports,assigning callback, bauds, etc.

=

void ReEnableSerial(){
Serial Bluetooth(SERIAL_TX,SERIAL_RX);
Serial Modem(PB_10,PB_11);
Serial Gps(PA_9,PA_10);


Modem.attach(&ModemRxCallback,Serial::RxIrq);
Modem.baud(115200);
 
 Gps.attach(&GpsRxCallback);
 Gps.baud(9600);
 Bluetooth.attach(&BtRxCallback);
 Bluetooth.baud(9600);

}

After i call ReEnableSerial(), at first SerialPortName.printf("mymessage"), program goes to mbed_die. And i can't understand why and what to do to avoid this.

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