re-init or resetting nrf52 dongle with pc-ble-driver-py

RE: re-init or resetting nrf52 dongle with pc-ble-driver-py

Jake Zimmer — Thu, 27 Jun 2019 01:13:47 GMT

Using the comments from this thread I was able to come up with a solution that does not require modification of the pc-ble-driver-py library. For anyone else looking for an answer, here is my code snippet:

def parametrizedDecorator(dec):
    def layer(*args, **kwargs):
        def repl(f):
            return dec(f, *args, **kwargs)
        return repl
    return layer

@parametrizedDecorator
def extendClass(func, c):
    setattr(c, func.__name__, func)
    return func

from pc_ble_driver_py import config
config.__conn_ic_id__ = "NRF52"
from pc_ble_driver_py.ble_driver import NordicSemiErrorCheck
from pc_ble_driver_py.ble_driver import driver

@NordicSemiErrorCheck
@wrapt.synchronized(BLEDriver.api_lock)
@extendClass(BLEDriver)
def reset(self, resetType=0):
    return driver.sd_rpc_conn_reset(self.rpc_adapter, resetType)

and to use it you should do something like this:

def reset_function():
    driver = BLEDriver(serial_port=self.serial_port, auto_flash=False)
    adapter = BLEAdapter(driver)
    adapter.driver.reset(resetType)
    time.sleep(1)

RE: re-init or resetting nrf52 dongle with pc-ble-driver-py

Einar Thorsrud — Fri, 21 Dec 2018 12:56:46 GMT

Hi,

Error code 8 is NRF_ERROR_INVALID_STATE. Looking tha the pc-ble-driver C++ implementation this comes from the send() function and is set if the current transport state is other than STATE_ACTIVE. It is not possible to send any commands in this state (without a working transport).

RE: re-init or resetting nrf52 dongle with pc-ble-driver-py

Riley — Thu, 20 Dec 2018 20:30:33 GMT

Hi Einar,

Thanks for the info. So does this mean I simply need the function to be:

def reset(self):
        return driver.sd_rpc_conn_reset(self.rpc_adapter,0)

So that SYS_RESET is chosen?

I tried this and I'm still seeing the error:

NordicSemiException: Failed to reset. Error code: 8

What does error code 8 mean exactly?

RE: re-init or resetting nrf52 dongle with pc-ble-driver-py

Einar Thorsrud — Fri, 14 Dec 2018 11:51:55 GMT

Hi,

Yes, if you are using a pc-ble-driver version that has the reset_mode (sd_rpc_reset_t) option for sd_rpc_conn_reset() (for instance the master branch), then you sould set it. It is either SYS_RESET (0) or SOFT_RESET (1). I assume SYS_RESET is what you want.

RE: re-init or resetting nrf52 dongle with pc-ble-driver-py

Riley — Thu, 13 Dec 2018 16:22:59 GMT

Hi @Einar,

I gave it shot at adding the sd_rpc_conn_reset() to the python library.

I added these lines to the blue_driver.py file under the BLEDriver(object): class.

    @NordicSemiErrorCheck
    @wrapt.synchronized(api_lock
    def reset(self):
        return driver.sd_rpc_conn_reset(self.rpc_adapter)

But it seems the sd_rpc_conn_reset() function has a second argument: sd_rpc_reset_t reset_mode, as per this code:
https://github.com/NordicSemiconductor/pc-ble-driver/blob/236d10fc939b5db5e9c11b46b488e4b8dfb44438/src/common/sd_rpc_impl.cpp

So when I try to call it I get this error:

exception=Failed to reset. Error code: 8

Do you know what the sd_rpc_reset_t reset_mode variable value and type needs to be to make the reset function work?

I'm using an "nRF52 Connectivity" dongle for my python application.

Thank you!

RE: re-init or resetting nrf52 dongle with pc-ble-driver-py

Riley — Mon, 03 Dec 2018 20:20:30 GMT

I am also experiencing this issue, gtorres if you manage to add the C++ implementation to the python wrapper, please let me know. Thanks 🙂

RE: re-init or resetting nrf52 dongle with pc-ble-driver-py

Einar Thorsrud — Mon, 03 Dec 2018 07:15:25 GMT

Hi,

You can find it in the C++ implementation, where you have sd_rpc_conn_reset(). It is not in the python layer, so unfortunately you have to add it to pc-ble-driver-py yourself.

RE: re-init or resetting nrf52 dongle with pc-ble-driver-py

gtorres — Mon, 03 Dec 2018 06:21:50 GMT

Einar,

I have not been able to figure out how to expose this command. Do you have any advice?

RE: re-init or resetting nrf52 dongle with pc-ble-driver-py

gtorres — Fri, 30 Nov 2018 17:19:55 GMT

Einar,

Is this exposed through the python layer? I will see if I can find it.

RE: re-init or resetting nrf52 dongle with pc-ble-driver-py

Einar Thorsrud — Fri, 30 Nov 2018 12:55:13 GMT

Hi,

I have not tested myself, but there is a SER_PKT_TYPE_RESET_CMD that could be used to reset the nRF via the serialization API. Have you tried that?