Hello,
A super-simple piece of code that enables UARTE1 to receive a byte stream does not seem to work.
It seems as if nrfx_uarte_rx_enable() hangs up.
When I single step through it, I can get it to complete without an error code (but still, something does not seem to operate correctly).
I do get to the first NRFX_UARTE_EVT_RX_BUF_REQUEST in the handler, but taht's as far as I get the software running.
The app is based/tested on BT_NUS_SHELL & tx_rx_non_blocking examples, (not) running on nRF52840DK, NCS2.7.0
This is the code:
#include <zephyr/types.h>
#include <zephyr/kernel.h>
#include <nrfx_config.h>
#include <nrfx_uarte.h>
#include <zephyr/logging/log.h>
#include <nrfx_gpiote.h>
#include <stdio.h>
#define STACKSIZE 1024
#define PRIORITY 0
#define PC0 NRF_GPIO_PIN_MAP(1, 4)
#define RES0 NRF_GPIO_PIN_MAP(1, 6) //(0, 13)
#define RES_AN0 NRF_GPIO_PIN_MAP(1, 8) //(0, 28)
#define UART_TX NRF_GPIO_PIN_MAP(1, 2)
#define UART_RX NRF_GPIO_PIN_MAP(1, 1)
#define UARTE_INST_IDX 1
static const nrfx_uarte_t uarte_inst = NRFX_UARTE_INSTANCE(UARTE_INST_IDX);
nrfx_uarte_config_t uarte_config = NRFX_UARTE_DEFAULT_CONFIG(UART_TX, UART_RX);
static uint8_t buff2[2][4] __attribute__((aligned(4)));;
static uint8_t buff_idx = 0;
void uarte_handler(nrfx_uarte_event_t const * p_event, void * p_context)
{
nrfx_err_t status;
switch(p_event->type) {
case NRFX_UARTE_EVT_TX_DONE:
nrf_gpio_pin_toggle(PC0); // DEBUG
NRFX_ASSERT(p_event->data.tx.length < 50);
break;
case NRFX_UARTE_EVT_RX_BUF_REQUEST:
nrf_gpio_pin_toggle(PC0); // DEBUG
status = nrfx_uarte_rx_buffer_set(&uarte_inst, buff2[buff_idx], 1);
NRFX_ASSERT(status == NRFX_SUCCESS);
buff_idx = buff_idx == 0 ? 1 : 0;
break;
case NRFX_UARTE_EVT_RX_DONE:
nrf_gpio_pin_toggle(PC0); // DEBUG
break;
default:
nrf_gpio_pin_toggle(PC0); // DEBUG
// NRFX_ASSERT(0); // NOT allowed
}
}
void thread_handler(void)
{
nrfx_err_t status;
nrf_gpio_cfg_output(RES0); // DEBUG
nrf_gpio_pin_write(RES0, 0); // DEBUG
nrf_gpio_cfg_output(PC0); // DEBUG
nrf_gpio_pin_write(PC0, 0); // DEBUG
uarte_config.baudrate = NRF_UARTE_BAUDRATE_115200;
uarte_config.p_context = (void*)&uarte_inst;
if(nrfx_uarte_init_check(&uarte_inst)) {
nrfx_uarte_uninit(&uarte_inst);
}
status = nrfx_uarte_init(&uarte_inst, &uarte_config, uarte_handler);
NRFX_ASSERT(status == NRFX_SUCCESS);
status = nrfx_uarte_rx_enable(&uarte_inst, 0); // << This one hangs up (but not if single stepping through it)
NRFX_ASSERT(status == NRFX_SUCCESS);
while(1) {
k_sleep(K_MSEC(100));
nrf_gpio_pin_toggle(RES0);
}
}
int main()
{
thread_handler();
return 0;
}
this is prj.conf
#
# Copyright (c) 2018 Nordic Semiconductor
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#
CONFIG_NCS_SAMPLES_DEFAULTS=y
CONFIG_HEAP_MEM_POOL_SIZE=2048
CONFIG_BT=y
CONFIG_BT_SMP=y
CONFIG_BT_PERIPHERAL=y
CONFIG_BT_DEVICE_NAME="BT_NUS_shell"
CONFIG_BT_DEVICE_APPEARANCE=833
CONFIG_BT_MAX_CONN=2
CONFIG_BT_MAX_PAIRED=2
# Enable the BT NUS shell
CONFIG_SHELL_BT_NUS=y
CONFIG_SHELL_BT_NUS_LOG_LEVEL_DBG=y
# Next CONFIGs added to the sample
CONFIG_NRFX_UARTE1=y
and app.overlay
&uart1 {
status = "okay";
interrupts = <40>, <2>;
};
What am I missing?
I've been banging my head for days now 
(even managed to exhaust chatGPT on that)
THANKS in advance to the savior..
