I am using NRF52832 DK, SDK 17.1.0, S132 Softdevice, Segger 5.42a and rtt viewer v7.62.
I am using blinky code from example.After building and debug the code I disconnect the board and reconnect it through external
rtt but it does not show any output though LOG shows: RTT Viewer connected. I tried with different board it works but it does not work with NRf52832 DK.
Below are my rtt viewer settings
Thanks & Regards
Meet Shah
The ble_app_blinky example will use the UART as backend for the logger module not RTT:
Hi Jared
instead of blinky example i am referring to twi_sensor example as i wanted to work with rtt. I have totally modify the code to simple one and in sdkconfig i have have enabled NRF_LOG_BACKEND_RTT_ENABLED 1,NRF_LOG_ENABLED 1 and NRF_LOG_BACKEND_UART_ENABLED 0 to use rtt instead of uart.
The modified code is
#include <stdbool.h>
#include <stdint.h>
#include "nrf.h"
#include "nordic_common.h"
#include "boards.h"
#include "nrf_delay.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_backend_rtt.h"
#include "nrf_log_default_backends.h"
/**
* @brief Function for application main entry.
*/
int main(void)
{
// Initialize the Logger module and check if any error occured during initialization
APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
// Initialize the default backends for nrf logger
NRF_LOG_DEFAULT_BACKENDS_INIT();
// print the log msg over uart port
printf("This is log data from nordic device..\r\n");
NRF_LOG_INFO("This is log data from nordic device..\r\n");
// a variable to hold counter value
uint32_t count = 0;
while (true)
{
// Dsiplay the logger info with variable
printf("Counter Value: %d \r\n", count);
NRF_LOG_INFO("Counter Value: %d \r\n", count);
nrf_delay_ms(500); // delay for 500 ms
count++; // increment the counter by 1
}
}
Before diconnecting I get logs in RTT viewer but after diconnecting DK and again connecting not logs are shown
Output before disconnecting
After disconnecting and again connecting
Hi Jared
instead of blinky example i am referring to twi_sensor example as i wanted to work with rtt. I have totally modify the code to simple one and in sdkconfig i have have enabled NRF_LOG_BACKEND_RTT_ENABLED 1,NRF_LOG_ENABLED 1 and NRF_LOG_BACKEND_UART_ENABLED 0 to use rtt instead of uart.
The modified code is
#include <stdbool.h>
#include <stdint.h>
#include "nrf.h"
#include "nordic_common.h"
#include "boards.h"
#include "nrf_delay.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_backend_rtt.h"
#include "nrf_log_default_backends.h"
/**
* @brief Function for application main entry.
*/
int main(void)
{
// Initialize the Logger module and check if any error occured during initialization
APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
// Initialize the default backends for nrf logger
NRF_LOG_DEFAULT_BACKENDS_INIT();
// print the log msg over uart port
printf("This is log data from nordic device..\r\n");
NRF_LOG_INFO("This is log data from nordic device..\r\n");
// a variable to hold counter value
uint32_t count = 0;
while (true)
{
// Dsiplay the logger info with variable
printf("Counter Value: %d \r\n", count);
NRF_LOG_INFO("Counter Value: %d \r\n", count);
nrf_delay_ms(500); // delay for 500 ms
count++; // increment the counter by 1
}
}
Before diconnecting I get logs in RTT viewer but after diconnecting DK and again connecting not logs are shown
Output before disconnecting
After disconnecting and again connecting
