Initialising peripheral fails NRFX_DRV_STATE_UNINITIALIZED and program hangs with Invalid State hardfault

Question

Hello, I am stuck initalising both TWIM and UARTE. I am focusing on the TWI Scanner example but using TWIM instead of TWI. No matter what I do I cannot get past the initalisation. The problem is that for both peripherals they fail the condition p_cb->state != NRFX_DRV_STATE_UNINITIALIZED . 
 I am seeing consistantly p_cb->state = 0x28 for UARTE and 0x10 for TWIM. 
 To simplify the reproduction I've now removed TWIM from my code and am only focusing on UARTE. I am really stuck at the moment and could use some advice. 
 My setup 
 
 Development Software: 
 
 nRF52 SDK v17.0.2 
 No software device 
 IDE: Visual Studio Code v1.53.2

Hardware: nRF52 DK (nRF52832) It says 2.0.0 on the sticker, I'm guessing that's the version? 
 Computer Platform: Ubuntu 20.10 
 
 Code

extern "C" {
 #include <stdio.h>
 #include "boards.h"
 #include "app_util_platform.h"
 #include "app_error.h"
 #include "sdk_config.h"
 #include "nrf.h"
 #include "nrf_log.h"
 #include "nrf_log_ctrl.h"
 #include "nrf_log_default_backends.h"
}

int main() {
 APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
 NRF_LOG_DEFAULT_BACKENDS_INIT(); // Hangs here

 while (true)
 {
 NRF_LOG_INFO("TWI scanner started.");
 NRF_LOG_FLUSH();
 }

 return 0;
}

Preprocessor definitions 
 
 BOARD_PCA10040 
 NRF52832_XXAA 
 ENABLE_SWO 
 ENABLE_TRACE 
 DEBUG 
 DEBUG_NRF 
 
 Screenshots 
 You can see on the left that state is assigned 0x28 . Where does that value come from? Perhaps the variable is uninitalised and random? 
 
 SDK Source files 
 
 /components/libraries/util/app_util_platform.c 
 /components/libraries/util/app_error.c 
 /components/libraries/util/app_error_handler_gcc.c 
 /components/serialization/connectivity/ser_conn_error_handling.c 
 /components/libraries/ringbuf/nrf_ringbuf.c 
 /components/libraries/memobj/nrf_memobj.c 
 /components/libraries/balloc/nrf_balloc.c 
 /components/libraries/atomic/nrf_atomic.c 
 /components/libraries/log/src/nrf_log_frontend.c 
 /components/libraries/log/src/nrf_log_default_backends.c 
 /components/libraries/log/src/nrf_log_backend_uart.c 
 /components/libraries/log/src/nrf_log_backend_serial.c 
 /components/libraries/log/src/nrf_log_str_formatter.c 
 /external/fprintf/nrf_fprintf.c 
 /external/fprintf/nrf_fprintf_format.c 
 /modules/nrfx/drivers/src/nrfx_uart.c 
 /modules/nrfx/drivers/src/nrfx_uarte.c 
 /modules/nrfx/drivers/src/prs/nrfx_prs.c 
 /integration/nrfx/legacy/nrf_drv_uart.c

Initialising peripheral fails NRFX_DRV_STATE_UNINITIALIZED and program hangs with Invalid State hardfault

Top Replies