RE: No data output from uart

Martin Lesund — Tue, 21 Aug 2018 11:57:08 GMT

Hi Alex,

I am sorry for the delay, have you had any progress with this issue?
If so could you give an update?

RE: No data output from uart

alex kim — Fri, 10 Aug 2018 04:21:24 GMT

Hi, Martin

I added log_init () to main.c as advised by you

The result of the program execution

1. log_init ()

APP_UART_FIFO_INIT ()

=> error_code 0x08 occurs in nrf_drv_uart_init ()

2. APP_UART_FIFO_INIT ()

log_init ()

=> No error occurred

3. #define NRF_LOG_BACKEND_SERIAL_USES_UART 1

#define NRF_LOG_BACKEND_SERIAL_USES_RTT 1

If the setting is as above I can not get uart input as input to app_uart_get ()

Best regards,

RE: No data output from uart

Martin Lesund — Thu, 09 Aug 2018 11:40:09 GMT

Hi Alex,

I would recommend that you take a look at the logger module documentation.

Here is how you can set the sdk_config.h to enable RTT.


#ifndef SDK_CONFIG_H
#define SDK_CONFIG_H
// <<< Use Configuration Wizard in Context Menu >>>\n
#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> 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 1
#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 4
#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 0
#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 0
#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 1
#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

Remembember to add:

static void log_init(void)
{
    ret_code_t err_code = NRF_LOG_INIT(NULL);
    APP_ERROR_CHECK(err_code);

    
		NRF_LOG_INFO("RTT Logging initialized");
}

to main.c.

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