Trouble porting CLI over BLE example

Question

Hi, 
 I have an existing application built on top of the ble_att_mtu_throughput example. I want to send log data over a BLE connection, and I am trying to use the CLI over BLE module to do this. 
 However, I'm having trouble porting the example to my project. Specifically, using the task manager module immediately triggers a hard fault (BusError or UsageFault_StateError). It fails at the line (inside task_switch) 
 VLDMIANE SP!, {S0-S31} /* If FPCA set, restore FPU registers. */ 
 When not using the task manager module (never call nrf_cli_task_create), the code crashes upon connecting to the server . The CLI over BLE example has no trouble connecting and sending data to this webpage. 
 The error appears in the sd_ble_gap_phy_update function inside PHY_UPDATE case under ble_evt_handler. Error code returned is 4 (NRF_ERROR_INVALID_STATE). So I'm essentially stuck being unable to send log data over a BLE connection. Any advice would be much appreciated! 
 case BLE_GAP_EVT_PHY_UPDATE_REQUEST:
 {
 ble_gap_phys_t const phys =
 {
 .rx_phys = BLE_GAP_PHY_AUTO,
 .tx_phys = BLE_GAP_PHY_AUTO,
 };
 err_code = sd_ble_gap_phy_update(p_gap_evt->conn_handle, &phys);
 APP_ERROR_CHECK(err_code);
 } break;

Edvin · Accepted Answer

Ok. Does the log say anything before you get the hardfault? Does the hardfault handler give any information? Do you see any logging from the hardfault handler at all? If not, try to replace the NVIC_SystemReset() in the final stage of the hardfault handler with: 
 /*lint -save -e14 */
__WEAK void HardFault_process(HardFault_stack_t * p_stack)
{
 // Restart the system by default
 //NVIC_SystemReset();
 while (true)
 {
 NRF_LOG_PROCESS();
 }
} 
 
 BR, Edvin

Trouble porting CLI over BLE example

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