combined uart example and timer example and it does not work.

[yun sung hyuk]

Hello, I am

I'm a Beginner at developing NRF 51822
My Development Environment

sdk : 12.3

IDE: KEIL v5

SoftDevices : s130

Recently, I've been experiencing a lot of problems combining various functions.

The contents of main.c are combined with uart examples of peripheral and timers examples of peripheral devices.

#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include "app_uart.h"
#include "app_error.h"
#include "nrf_delay.h"
#include "nrf.h"
#include "bsp.h"

//add timer define
#include "nrf_drv_timer.h"
#include "nrf_timer.h"

//#define ENABLE_LOOPBACK_TEST  /**< if defined, then this example will be a loopback test, which means that TX should be connected to RX to get data loopback. */

#define MAX_TEST_DATA_BYTES     (15U)                /**< max number of test bytes to be used for tx and rx. */
#define UART_TX_BUF_SIZE 256                         /**< UART TX buffer size. */
#define UART_RX_BUF_SIZE 256                         /**< UART RX buffer size. */
//#define ENABLE_LOOPBACK_TEST											 	 /**< ENABLE_LOOPBACK_TEST */ 

const nrf_drv_timer_t TIMER_test = NRF_DRV_TIMER_INSTANCE(1);


void uart_error_handle(app_uart_evt_t * p_event)
{
    if (p_event->evt_type == APP_UART_COMMUNICATION_ERROR)
    {
        APP_ERROR_HANDLER(p_event->data.error_communication);
    }
    else if (p_event->evt_type == APP_UART_FIFO_ERROR)
    {
        APP_ERROR_HANDLER(p_event->data.error_code);
    }
}



#ifdef ENABLE_LOOPBACK_TEST
/** @brief Function for setting the @ref ERROR_PIN high, and then enter an infinite loop.
 */
static void show_error(void)
{

    bsp_board_leds_on();
    while (true)
    {
        // Do nothing.
    }
}


/** @brief Function for testing UART loop back.
 *  @details Transmitts one character at a time to check if the data received from the loopback is same as the transmitted data.
 *  @note  @ref TX_PIN_NUMBER must be connected to @ref RX_PIN_NUMBER)
 */
static void uart_loopback_test()
{
    uint8_t * tx_data = (uint8_t *)("\r\nLOOPBACK_TEST\r\n");
    uint8_t   rx_data;

    // Start sending one byte and see if you get the same
    for (uint32_t i = 0; i < MAX_TEST_DATA_BYTES; i++)
    {
        uint32_t err_code;
        while (app_uart_put(tx_data[i]) != NRF_SUCCESS);

        nrf_delay_ms(10);
        err_code = app_uart_get(&rx_data);

        if ((rx_data != tx_data[i]) || (err_code != NRF_SUCCESS))
        {
            show_error();
        }
    }
    return;
}


#endif

#define led1 15
#define led2	17

void gpio_init()
{
		nrf_gpio_cfg_output(led1);
		nrf_gpio_cfg_output(led2);
}
 void sonic_handler(nrf_timer_event_t event_type, void* p_context)
 {
	 //static uint32_t i;
	 
	 switch (event_type)
    {
        case NRF_TIMER_EVENT_COMPARE0:
           // bsp_board_led_invert(led_to_invert);
				nrf_gpio_pin_toggle(led2);
            break;

        default:
            //Do nothing.
            break;
    }
	 
 }
void uart_start()
{
	uint32_t err_code;

    //bsp_board_leds_init();

    const app_uart_comm_params_t comm_params =
      {
          RX_PIN_NUMBER,
          TX_PIN_NUMBER,
          RTS_PIN_NUMBER,
          CTS_PIN_NUMBER,
          APP_UART_FLOW_CONTROL_DISABLED,
          false,
          UART_BAUDRATE_BAUDRATE_Baud115200
      };

    APP_UART_FIFO_INIT(&comm_params,
                         UART_RX_BUF_SIZE,
                         UART_TX_BUF_SIZE,
                         uart_error_handle,
                         APP_IRQ_PRIORITY_LOWEST,
                         err_code);

    APP_ERROR_CHECK(err_code);
			
}

void timer_start()
{
		uint32_t time_ms = 1000; //Time(in miliseconds) between consecutive compare events.
    uint32_t time_ticks;
    uint32_t err_code = NRF_SUCCESS;
		nrf_drv_timer_config_t timer_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;
    err_code = nrf_drv_timer_init(&TIMER_test, &timer_cfg, sonic_handler);
    APP_ERROR_CHECK(err_code);

    time_ticks = nrf_drv_timer_ms_to_ticks(&TIMER_test, time_ms);

    nrf_drv_timer_extended_compare(
         &TIMER_test, NRF_TIMER_CC_CHANNEL0, time_ticks, NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK, true);

    nrf_drv_timer_enable(&TIMER_test);
}
/**
 * @brief Function for main application entry.
 */
int main(void)
{
		uint8_t cr;
		gpio_init();
		timer_start();
		uart_start();

#ifndef ENABLE_LOOPBACK_TEST
    printf("\r\nStart: \r\n");

    while (true)
    {
			
				nrf_gpio_pin_toggle(led1);
				nrf_gpio_pin_toggle(led2);
				
			
       
       while (app_uart_get(&cr) != NRF_SUCCESS);
       while (app_uart_put(cr) != NRF_SUCCESS);
		


        if (cr == 'q' || cr == 'Q')
        {
            printf(" \r\nExit!\r\n");

            while (true)
            {
                // Do nothing.
            }
        }
			
		//	__WFI();
				
    }
#else

    // This part of the example is just for testing the loopback .
    while (true)
    {
        uart_loopback_test();
    }
#endif
}

There were many errors in the process of merging, but the modification of sdk_config.h resolved.

#ifndef SDK_CONFIG_H
#define SDK_CONFIG_H
// <<< Use Configuration Wizard in Context Menu >>>\n
#define USE_APP_CONFIG
#ifdef USE_APP_CONFIG
#include "app_config.h"
#endif
// <h> nRF_Drivers 

//==========================================================
// <e> PERIPHERAL_RESOURCE_SHARING_ENABLED - nrf_drv_common - Peripheral drivers common module
//==========================================================
#ifndef PERIPHERAL_RESOURCE_SHARING_ENABLED
#define PERIPHERAL_RESOURCE_SHARING_ENABLED 0
#endif
#if  PERIPHERAL_RESOURCE_SHARING_ENABLED
// <e> COMMON_CONFIG_LOG_ENABLED - Enables logging in the module.
//==========================================================
#ifndef COMMON_CONFIG_LOG_ENABLED
#define COMMON_CONFIG_LOG_ENABLED 0
#endif
#if  COMMON_CONFIG_LOG_ENABLED
// <o> COMMON_CONFIG_LOG_LEVEL  - Default Severity level
 
// <0=> Off 
// <1=> Error 
// <2=> Warning 
// <3=> Info 
// <4=> Debug 

#ifndef COMMON_CONFIG_LOG_LEVEL
#define COMMON_CONFIG_LOG_LEVEL 3
#endif

// <o> COMMON_CONFIG_INFO_COLOR  - ANSI escape code prefix.
 
// <0=> Default 
// <1=> Black 
// <2=> Red 
// <3=> Green 
// <4=> Yellow 
// <5=> Blue 
// <6=> Magenta 
// <7=> Cyan 
// <8=> White 

#ifndef COMMON_CONFIG_INFO_COLOR
#define COMMON_CONFIG_INFO_COLOR 0
#endif

// <o> COMMON_CONFIG_DEBUG_COLOR  - ANSI escape code prefix.
 
// <0=> Default 
// <1=> Black 
// <2=> Red 
// <3=> Green 
// <4=> Yellow 
// <5=> Blue 
// <6=> Magenta 
// <7=> Cyan 
// <8=> White 

#ifndef COMMON_CONFIG_DEBUG_COLOR
#define COMMON_CONFIG_DEBUG_COLOR 0
#endif

#endif //COMMON_CONFIG_LOG_ENABLED
// </e>

#endif //PERIPHERAL_RESOURCE_SHARING_ENABLED
//</e>


// <e> TIMER_ENABLED - nrf_drv_timer - TIMER periperal driver
//==========================================================
#ifndef TIMER_ENABLED
#define TIMER_ENABLED 1
#endif
#if  TIMER_ENABLED
// <o> TIMER_DEFAULT_CONFIG_FREQUENCY  - Timer frequency if in Timer mode
 
// <0=> 16 MHz 
// <1=> 8 MHz 
// <2=> 4 MHz 
// <3=> 2 MHz 
// <4=> 1 MHz 
// <5=> 500 kHz 
// <6=> 250 kHz 
// <7=> 125 kHz 
// <8=> 62.5 kHz 
// <9=> 31.25 kHz 

#ifndef TIMER_DEFAULT_CONFIG_FREQUENCY
#define TIMER_DEFAULT_CONFIG_FREQUENCY 0
#endif

// <o> TIMER_DEFAULT_CONFIG_MODE  - Timer mode or operation
 
// <0=> Timer 
// <1=> Counter 

#ifndef TIMER_DEFAULT_CONFIG_MODE
#define TIMER_DEFAULT_CONFIG_MODE 0
#endif

// <o> TIMER_DEFAULT_CONFIG_BIT_WIDTH  - Timer counter bit width
 
// <0=> 16 bit 
// <1=> 8 bit 
// <2=> 24 bit 
// <3=> 32 bit 

#ifndef TIMER_DEFAULT_CONFIG_BIT_WIDTH
#define TIMER_DEFAULT_CONFIG_BIT_WIDTH 3
#endif

// <o> TIMER_DEFAULT_CONFIG_IRQ_PRIORITY  - Interrupt priority
 

// <i> Priorities 0,2 (nRF51) and 0,1,4,5 (nRF52) are reserved for SoftDevice
// <0=> 0 (highest) 
// <1=> 1 
// <2=> 2 
// <3=> 3 

#ifndef TIMER_DEFAULT_CONFIG_IRQ_PRIORITY
#define TIMER_DEFAULT_CONFIG_IRQ_PRIORITY 3
#endif

// <q> TIMER0_ENABLED  - Enable TIMER0 instance
 

#ifndef TIMER0_ENABLED
#define TIMER0_ENABLED 1
#endif

// <q> TIMER1_ENABLED  - Enable TIMER1 instance
 

#ifndef TIMER1_ENABLED
#define TIMER1_ENABLED 0
#endif

// <q> TIMER2_ENABLED  - Enable TIMER2 instance
 

#ifndef TIMER2_ENABLED
#define TIMER2_ENABLED 0
#endif

// <q> TIMER3_ENABLED  - Enable TIMER3 instance
 

#ifndef TIMER3_ENABLED
#define TIMER3_ENABLED 0
#endif

// <q> TIMER4_ENABLED  - Enable TIMER4 instance
 

#ifndef TIMER4_ENABLED
#define TIMER4_ENABLED 0
#endif

// <e> TIMER_CONFIG_LOG_ENABLED - Enables logging in the module.
//==========================================================
#ifndef TIMER_CONFIG_LOG_ENABLED
#define TIMER_CONFIG_LOG_ENABLED 0
#endif
#if  TIMER_CONFIG_LOG_ENABLED
// <o> TIMER_CONFIG_LOG_LEVEL  - Default Severity level
 
// <0=> Off 
// <1=> Error 
// <2=> Warning 
// <3=> Info 
// <4=> Debug 

#ifndef TIMER_CONFIG_LOG_LEVEL
#define TIMER_CONFIG_LOG_LEVEL 3
#endif

// <o> TIMER_CONFIG_INFO_COLOR  - ANSI escape code prefix.
 
// <0=> Default 
// <1=> Black 
// <2=> Red 
// <3=> Green 
// <4=> Yellow 
// <5=> Blue 
// <6=> Magenta 
// <7=> Cyan 
// <8=> White 

#ifndef TIMER_CONFIG_INFO_COLOR
#define TIMER_CONFIG_INFO_COLOR 0
#endif

// <o> TIMER_CONFIG_DEBUG_COLOR  - ANSI escape code prefix.
 
// <0=> Default 
// <1=> Black 
// <2=> Red 
// <3=> Green 
// <4=> Yellow 
// <5=> Blue 
// <6=> Magenta 
// <7=> Cyan 
// <8=> White 

#ifndef TIMER_CONFIG_DEBUG_COLOR
#define TIMER_CONFIG_DEBUG_COLOR 0
#endif

#endif //TIMER_CONFIG_LOG_ENABLED
// </e>

#endif //TIMER_ENABLED
// </e>
// <e> UART_ENABLED - nrf_drv_uart - UART/UARTE peripheral driver
//==========================================================
#ifndef UART_ENABLED
#define UART_ENABLED 1
#endif
#if  UART_ENABLED
// <o> UART_DEFAULT_CONFIG_HWFC  - Hardware Flow Control
 
// <0=> Disabled 
// <1=> Enabled 

#ifndef UART_DEFAULT_CONFIG_HWFC
#define UART_DEFAULT_CONFIG_HWFC 0
#endif

// <o> UART_DEFAULT_CONFIG_PARITY  - Parity
 
// <0=> Excluded 
// <14=> Included 

#ifndef UART_DEFAULT_CONFIG_PARITY
#define UART_DEFAULT_CONFIG_PARITY 0
#endif

// <o> UART_DEFAULT_CONFIG_BAUDRATE  - Default Baudrate
 
// <323584=> 1200 baud 
// <643072=> 2400 baud 
// <1290240=> 4800 baud 
// <2576384=> 9600 baud 
// <3862528=> 14400 baud 
// <5152768=> 19200 baud 
// <7716864=> 28800 baud 
// <10289152=> 38400 baud 
// <15400960=> 57600 baud 
// <20615168=> 76800 baud 
// <30924800=> 115200 baud 
// <61865984=> 230400 baud 
// <67108864=> 250000 baud 
// <121634816=> 460800 baud 
// <251658240=> 921600 baud 
// <268435456=> 57600 baud 

#ifndef UART_DEFAULT_CONFIG_BAUDRATE
#define UART_DEFAULT_CONFIG_BAUDRATE 30924800
#endif

// <o> UART_DEFAULT_CONFIG_IRQ_PRIORITY  - Interrupt priority
 

// <i> Priorities 0,2 (nRF51) and 0,1,4,5 (nRF52) are reserved for SoftDevice
// <0=> 0 (highest) 
// <1=> 1 
// <2=> 2 
// <3=> 3 

#ifndef UART_DEFAULT_CONFIG_IRQ_PRIORITY
#define UART_DEFAULT_CONFIG_IRQ_PRIORITY 3
#endif

// <q> UART_EASY_DMA_SUPPORT  - Driver supporting EasyDMA
 

#ifndef UART_EASY_DMA_SUPPORT
#define UART_EASY_DMA_SUPPORT 1
#endif

// <q> UART_LEGACY_SUPPORT  - Driver supporting Legacy mode
 

#ifndef UART_LEGACY_SUPPORT
#define UART_LEGACY_SUPPORT 1
#endif

// <e> UART0_ENABLED - Enable UART0 instance
//==========================================================
#ifndef UART0_ENABLED
#define UART0_ENABLED 1
#endif
#if  UART0_ENABLED
// <q> UART0_CONFIG_USE_EASY_DMA  - Default setting for using EasyDMA
 

#ifndef UART0_CONFIG_USE_EASY_DMA
#define UART0_CONFIG_USE_EASY_DMA 1
#endif

#endif //UART0_ENABLED
// </e>

// <e> UART_CONFIG_LOG_ENABLED - Enables logging in the module.
//==========================================================
#ifndef UART_CONFIG_LOG_ENABLED
#define UART_CONFIG_LOG_ENABLED 0
#endif
#if  UART_CONFIG_LOG_ENABLED
// <o> UART_CONFIG_LOG_LEVEL  - Default Severity level
 
// <0=> Off 
// <1=> Error 
// <2=> Warning 
// <3=> Info 
// <4=> Debug 

#ifndef UART_CONFIG_LOG_LEVEL
#define UART_CONFIG_LOG_LEVEL 3
#endif

// <o> UART_CONFIG_INFO_COLOR  - ANSI escape code prefix.
 
// <0=> Default 
// <1=> Black 
// <2=> Red 
// <3=> Green 
// <4=> Yellow 
// <5=> Blue 
// <6=> Magenta 
// <7=> Cyan 
// <8=> White 

#ifndef UART_CONFIG_INFO_COLOR
#define UART_CONFIG_INFO_COLOR 0
#endif

// <o> UART_CONFIG_DEBUG_COLOR  - ANSI escape code prefix.
 
// <0=> Default 
// <1=> Black 
// <2=> Red 
// <3=> Green 
// <4=> Yellow 
// <5=> Blue 
// <6=> Magenta 
// <7=> Cyan 
// <8=> White 

#ifndef UART_CONFIG_DEBUG_COLOR
#define UART_CONFIG_DEBUG_COLOR 0
#endif

#endif //UART_CONFIG_LOG_ENABLED
// </e>

#endif //UART_ENABLED
// </e>

// </h> 
//==========================================================

// <h> nRF_Libraries 

//==========================================================
// <q> APP_FIFO_ENABLED  - app_fifo - Software FIFO implementation
 

#ifndef APP_FIFO_ENABLED
#define APP_FIFO_ENABLED 1
#endif

// <e> APP_UART_ENABLED - app_uart - UART driver
//==========================================================
#ifndef APP_UART_ENABLED
#define APP_UART_ENABLED 1
#endif
#if  APP_UART_ENABLED
// <o> APP_UART_DRIVER_INSTANCE  - UART instance used
 
// <0=> 0 

#ifndef APP_UART_DRIVER_INSTANCE
#define APP_UART_DRIVER_INSTANCE 0
#endif

#endif //APP_UART_ENABLED
// </e>

// <q> RETARGET_ENABLED  - retarget - Retargeting stdio functions
 

#ifndef RETARGET_ENABLED
#define RETARGET_ENABLED 1
#endif

// </h> 
//==========================================================

// <h> nRF_Log 

//==========================================================
// <e> NRF_LOG_ENABLED - nrf_log - Logging
//==========================================================
#ifndef NRF_LOG_ENABLED
#define NRF_LOG_ENABLED 0
#endif
#if  NRF_LOG_ENABLED
// <e> NRF_LOG_USES_COLORS - If enabled then ANSI escape code for colors is prefixed to every string
//==========================================================
#ifndef NRF_LOG_USES_COLORS
#define NRF_LOG_USES_COLORS 0
#endif
#if  NRF_LOG_USES_COLORS
// <o> NRF_LOG_COLOR_DEFAULT  - ANSI escape code prefix.
 
// <0=> Default 
// <1=> Black 
// <2=> Red 
// <3=> Green 
// <4=> Yellow 
// <5=> Blue 
// <6=> Magenta 
// <7=> Cyan 
// <8=> White 

#ifndef NRF_LOG_COLOR_DEFAULT
#define NRF_LOG_COLOR_DEFAULT 0
#endif

// <o> NRF_LOG_ERROR_COLOR  - ANSI escape code prefix.
 
// <0=> Default 
// <1=> Black 
// <2=> Red 
// <3=> Green 
// <4=> Yellow 
// <5=> Blue 
// <6=> Magenta 
// <7=> Cyan 
// <8=> White 

#ifndef NRF_LOG_ERROR_COLOR
#define NRF_LOG_ERROR_COLOR 0
#endif

// <o> NRF_LOG_WARNING_COLOR  - ANSI escape code prefix.
 
// <0=> Default 
// <1=> Black 
// <2=> Red 
// <3=> Green 
// <4=> Yellow 
// <5=> Blue 
// <6=> Magenta 
// <7=> Cyan 
// <8=> White 

#ifndef NRF_LOG_WARNING_COLOR
#define NRF_LOG_WARNING_COLOR 0
#endif

#endif //NRF_LOG_USES_COLORS
// </e>

// <o> NRF_LOG_DEFAULT_LEVEL  - Default Severity level
 
// <0=> Off 
// <1=> Error 
// <2=> Warning 
// <3=> Info 
// <4=> Debug 

#ifndef NRF_LOG_DEFAULT_LEVEL
#define NRF_LOG_DEFAULT_LEVEL 3
#endif

// <e> NRF_LOG_DEFERRED - Enable deffered logger.

// <i> Log data is buffered and can be processed in idle.
//==========================================================
#ifndef NRF_LOG_DEFERRED
#define NRF_LOG_DEFERRED 1
#endif
#if  NRF_LOG_DEFERRED
// <o> NRF_LOG_DEFERRED_BUFSIZE - Size of the buffer for logs in words. 
// <i> Must be power of 2

#ifndef NRF_LOG_DEFERRED_BUFSIZE
#define NRF_LOG_DEFERRED_BUFSIZE 256
#endif

#endif //NRF_LOG_DEFERRED
// </e>

// <q> NRF_LOG_USES_TIMESTAMP  - Enable timestamping
 

// <i> Function for getting the timestamp is provided by the user

#ifndef NRF_LOG_USES_TIMESTAMP
#define NRF_LOG_USES_TIMESTAMP 0
#endif

#endif //NRF_LOG_ENABLED
// </e>

// <h> nrf_log_backend - Logging sink

//==========================================================
// <o> NRF_LOG_BACKEND_MAX_STRING_LENGTH - Buffer for storing single output string 
// <i> Logger backend RAM usage is determined by this value.

#ifndef NRF_LOG_BACKEND_MAX_STRING_LENGTH
#define NRF_LOG_BACKEND_MAX_STRING_LENGTH 256
#endif

// <o> NRF_LOG_TIMESTAMP_DIGITS - Number of digits for timestamp 
// <i> If higher resolution timestamp source is used it might be needed to increase that

#ifndef NRF_LOG_TIMESTAMP_DIGITS
#define NRF_LOG_TIMESTAMP_DIGITS 8
#endif

// <e> NRF_LOG_BACKEND_SERIAL_USES_UART - If enabled data is printed over UART
//==========================================================
#ifndef NRF_LOG_BACKEND_SERIAL_USES_UART
#define NRF_LOG_BACKEND_SERIAL_USES_UART 1
#endif
#if  NRF_LOG_BACKEND_SERIAL_USES_UART
// <o> NRF_LOG_BACKEND_SERIAL_UART_BAUDRATE  - Default Baudrate
 
// <323584=> 1200 baud 
// <643072=> 2400 baud 
// <1290240=> 4800 baud 
// <2576384=> 9600 baud 
// <3862528=> 14400 baud 
// <5152768=> 19200 baud 
// <7716864=> 28800 baud 
// <10289152=> 38400 baud 
// <15400960=> 57600 baud 
// <20615168=> 76800 baud 
// <30924800=> 115200 baud 
// <61865984=> 230400 baud 
// <67108864=> 250000 baud 
// <121634816=> 460800 baud 
// <251658240=> 921600 baud 
// <268435456=> 57600 baud 

#ifndef NRF_LOG_BACKEND_SERIAL_UART_BAUDRATE
#define NRF_LOG_BACKEND_SERIAL_UART_BAUDRATE 30924800
#endif

// <o> NRF_LOG_BACKEND_SERIAL_UART_TX_PIN - UART TX pin 
#ifndef NRF_LOG_BACKEND_SERIAL_UART_TX_PIN
#define NRF_LOG_BACKEND_SERIAL_UART_TX_PIN 9
#endif

// <o> NRF_LOG_BACKEND_SERIAL_UART_RX_PIN - UART RX pin 
#ifndef NRF_LOG_BACKEND_SERIAL_UART_RX_PIN
#define NRF_LOG_BACKEND_SERIAL_UART_RX_PIN 11
#endif

// <o> NRF_LOG_BACKEND_SERIAL_UART_RTS_PIN - UART RTS pin 
#ifndef NRF_LOG_BACKEND_SERIAL_UART_RTS_PIN
#define NRF_LOG_BACKEND_SERIAL_UART_RTS_PIN 8
#endif

// <o> NRF_LOG_BACKEND_SERIAL_UART_CTS_PIN - UART CTS pin 
#ifndef NRF_LOG_BACKEND_SERIAL_UART_CTS_PIN
#define NRF_LOG_BACKEND_SERIAL_UART_CTS_PIN 10
#endif

// <o> NRF_LOG_BACKEND_SERIAL_UART_FLOW_CONTROL  - Hardware Flow Control
 
// <0=> Disabled 
// <1=> Enabled 

#ifndef NRF_LOG_BACKEND_SERIAL_UART_FLOW_CONTROL
#define NRF_LOG_BACKEND_SERIAL_UART_FLOW_CONTROL 0
#endif

// <o> NRF_LOG_BACKEND_UART_INSTANCE  - UART instance used
 
// <0=> 0 

#ifndef NRF_LOG_BACKEND_UART_INSTANCE
#define NRF_LOG_BACKEND_UART_INSTANCE 0
#endif

#endif //NRF_LOG_BACKEND_SERIAL_USES_UART
// </e>

// <e> NRF_LOG_BACKEND_SERIAL_USES_RTT - If enabled data is printed using RTT
//==========================================================
#ifndef NRF_LOG_BACKEND_SERIAL_USES_RTT
#define NRF_LOG_BACKEND_SERIAL_USES_RTT 0
#endif
#if  NRF_LOG_BACKEND_SERIAL_USES_RTT
// <o> NRF_LOG_BACKEND_RTT_OUTPUT_BUFFER_SIZE - RTT output buffer size. 
// <i> Should be equal or bigger than \ref NRF_LOG_BACKEND_MAX_STRING_LENGTH.
// <i> This value is used in Segger RTT configuration to set the buffer size
// <i> if it is bigger than default RTT buffer size.

#ifndef NRF_LOG_BACKEND_RTT_OUTPUT_BUFFER_SIZE
#define NRF_LOG_BACKEND_RTT_OUTPUT_BUFFER_SIZE 512
#endif

#endif //NRF_LOG_BACKEND_SERIAL_USES_RTT
// </e>

// </h> 
//==========================================================

// </h> 
//==========================================================

// <h> nRF_Segger_RTT 

//==========================================================
// <h> segger_rtt - SEGGER RTT

//==========================================================
// <o> SEGGER_RTT_CONFIG_BUFFER_SIZE_UP - Size of upstream buffer. 
#ifndef SEGGER_RTT_CONFIG_BUFFER_SIZE_UP
#define SEGGER_RTT_CONFIG_BUFFER_SIZE_UP 64
#endif

// <o> SEGGER_RTT_CONFIG_MAX_NUM_UP_BUFFERS - Size of upstream buffer. 
#ifndef SEGGER_RTT_CONFIG_MAX_NUM_UP_BUFFERS
#define SEGGER_RTT_CONFIG_MAX_NUM_UP_BUFFERS 2
#endif

// <o> SEGGER_RTT_CONFIG_BUFFER_SIZE_DOWN - Size of upstream buffer. 
#ifndef SEGGER_RTT_CONFIG_BUFFER_SIZE_DOWN
#define SEGGER_RTT_CONFIG_BUFFER_SIZE_DOWN 16
#endif

// <o> SEGGER_RTT_CONFIG_MAX_NUM_DOWN_BUFFERS - Size of upstream buffer. 
#ifndef SEGGER_RTT_CONFIG_MAX_NUM_DOWN_BUFFERS
#define SEGGER_RTT_CONFIG_MAX_NUM_DOWN_BUFFERS 2
#endif

// </h> 
//==========================================================

// </h> 
//==========================================================

// <<< end of configuration section >>>
#endif //SDK_CONFIG_H

I saw the program stop during the 'uart' operation.

If the operation is normal, the letter 'start :' will appear and wait for input, but only "star" will operate and stop.

However, I have confirmed that deleting 'timer_start();' from my source code will work properly.

Add-

For use with 'softdevice s130', irom and iram have been modified and operated.

Q 1.  Did I set the timer wrong and the program died?

Q 2. Where are the documents describing how to modify sdk_config.h or the function and its contents?

Q 3. I forcibly modified iram and irom for use with 'soft device s130', is it correct to use them like that?

[Einar Thorsrud]

Hi,

Q 1.  Did I set the timer wrong and the program died?

I do not immediately see a problem with your timer usage. Please note that the program will never "die". The nRF will be in a state of some sort, perhaps an error has occurred and the error handler is running, potentially putting the system in an eternal loop or resetting. Or something else might be happening. Have you done any debugging to see what exactly is happening and what state the system is in? You may find An introduction to error handling in nRF5 projects usefull.

Q 2. Where are the documents describing how to modify sdk_config.h or the function and its contents?

There is no over-all documentation on the sdk_config.h configurations. The configurations are module-specific, and you can refer to the documentation for various drivers an libraries to see the description of most of them. But in this case, if you have two working examples, you need to copy over the configuration from the other example's sdk_config.h, so that your configuration is complete.

Q 3. I forcibly modified iram and irom for use with 'soft device s130', is it correct to use them like that?

The IROM1 start is correct. 0x1B000 is the size of S130 version 2.0.1, so that is also the correct start address of the application. The RAM configuration depends on SoftDevice configuration, so if you believe that is too low, you could set the RAM start address a bit higher (and the size a bit lower). Setting it too high is not a problem, provided there is still enough RAM for your application.

However, I have confirmed that deleting 'timer_start();' from my source code will work properly.

This could indicate that your code initializing timer_start() causes some problems, though I did not spot it. Does debugging this part tell you something interesting? Does nrf_drv_timer_init() return an error?

[yun sung hyuk]

i have not verified the return of 'nrf_drv_timer_init' ().
I'll print out the return value with uart.

I'll reply again after checking the detailed action.

Thank you for your kind reply to everything.