PSoC4 BLE GPIO Interrupt wake from deepsleep

[RuHe_1008296]

Hey All

I have a problem with a project I am working on. I currently use a CYBLE-214009 it samples some data from a IMU via I2C, and transmit it via BLE. This works well if the system does not enter low power modes. BUT...

If i enter deepsleep, when the BLE or the I2C does not have any more work to do, and a GPIO interrupt from the IMU (10 Hz) is waking the processor the BLE gets stuck. When I look at the stack trace it is just haled here:

     0 CySysPmSleep() Generated_Source\PSoC4\cyPm.c 44 0x00001CCE (All)

     1 ll_wait_to_exit_dsm() ?????? ?????? 0x00014810 (All)

     2 ll_exit_low_power_mode() ?????? ?????? 0x00014090 (All)

     3 ll_task_handler() ?????? ?????? 0x00017B64 (All)

     4 llft_service_queue() ?????? ?????? 0x000185C6 (All)

     5 llf_task_start_routine() ?????? ?????? 0x0001851E (All)

[Anonymous]

Did you correctly put the BLE stack into low power before putting the CPU into low power mode?

Also, clock sources being turned off might be a cause too?

[RuHe_1008296]

The system is set up with the IMO at 48MHz. So the ECO should only be used for the BLE.

If my application are ready to go to sleep, i am checking the BLE Module the following way:

blePower = CyBle_GetBleSsState();

if(ble_lpmode == CYBLE_BLESS_DEEPSLEEP &&

    (blePower == CYBLE_BLESS_STATE_DEEPSLEEP || blePower == CYBLE_BLESS_STATE_ECO_ON))

        return deepSleep;

  if(blePower != CYBLE_BLESS_STATE_EVENT_CLOSE)

        return sleep;

  return awake;

(where ble_lpmode is the response from the last time the CyBle_EnterLPM(CYBLE_BLESS_DEEPSLEEP) function was called).

[Anonymous · Accepted solution]

According to the documentation in the PSoC Creator:

*    <td>CYBLE_BLESS_STATE_ECO_ON</td>

*    <td>BLE Sub System is in process of wakeup from Deep Sleep Mode and ECO(XTAL) is turned on.

*        CPU can be put in Deep Sleep Mode.</td>

Thus, I would remove the || blePower == CYBLE_BLESS_STATE_ECO_ON part of the check code, as you would be saying the unit is in deepsleep when it is just waking up from deepsleep and is awake now.