Hi guys, hope all is well. I was hoping someone could help me out with this particular issue. Maybe someone on here has tried to do the same thing.
Just some background about my test setup:
- Using 2x nRF52840's, custom hardware.
- One is the client, the other is the server (running the Light Switch example from Mesh SDK v3.1.0)
- Using SDK v15.2, and my code is based off the examples in there.
- Using s140 v6.1.0.
I am trying to use the Buttonless DFU example with my code (both light switch server and client), and have had limited success. When performing a DFU via the Buttonless DFU service, all works well and as expected.
My Issue arises when I try and provision a node. It looks like during the provisioning process, the code gets to this point (in mesh_provisionee.c):
static void sd_state_evt_handler(nrf_sdh_state_evt_t state, void * p_context)
{
(void) p_context;
if (!m_doing_gatt_reset)
{
return;
}
switch (state)
{
...
case NRF_SDH_EVT_STATE_DISABLED: /* Gets to this handler */
{
uint32_t err_code = nrf_sdh_enable_request();
APP_ERROR_CHECK(err_code);
break;
}
default:
break;
}
}
But in the buttonless dfu code, there is the same handler:
static void buttonless_dfu_sdh_state_observer(nrf_sdh_state_evt_t state, void * p_context)
{
if (state == NRF_SDH_EVT_STATE_DISABLED)
{
// Softdevice was disabled before going into reset. Inform bootloader to skip CRC on next boot.
nrf_power_gpregret2_set(BOOTLOADER_DFU_SKIP_CRC);
//Go to system off.
nrf_pwr_mgmt_shutdown(NRF_PWR_MGMT_SHUTDOWN_GOTO_SYSOFF);
}
}
I have run the debugger, and it looks like this code gets executed as well, which powers down the device. This appears to be the root cause of the problem. I have tried to get around it by doing the following:
static void buttonless_dfu_sdh_state_observer(nrf_sdh_state_evt_t state, void * p_context)
{
if (state == NRF_SDH_EVT_STATE_DISABLED)
{
if(MeshServer_ProvisioningStarted()|| MeshClient_ProvisioningStarted())
bDeviceProvisioning = true;
else
bDeviceProvisioning = false;
__LOG(LOG_SRC_APP, LOG_LEVEL_INFO, "[DEBUG] bDeviceProvisioning = %d\n", (int)bDeviceProvisioning);
if(!bDeviceProvisioning){
// Softdevice was disabled before going into reset. Inform bootloader to skip CRC on next boot.
nrf_power_gpregret2_set(BOOTLOADER_DFU_SKIP_CRC);
//Go to system off.
nrf_pwr_mgmt_shutdown(NRF_PWR_MGMT_SHUTDOWN_GOTO_SYSOFF);
}
}
}
I check when the device is provisioning, and when it is - I block out this bit of code. It is a bit dirty, and I was wondering if there was a nicer way of doing it. I am aware that there exists built in DFU facilities in the mesh stack. Could I maybe use the Mesh DFU like you would use the Buttonless DFU, ie with a bootloader?
Regards,
Gord
