Define this macro to include filenames in error context.

For release builds, do not include filename to save memory. MBED_PLATFORM_CONF_ERROR_FILENAME_CAPTURE_ENABLEDDefine this macro to enable error history MBED_PLATFORM_CONF_ERROR_HIST_ENABLED

Definition at line 43 of file mbed_error.h.

Macro for defining a Custom error status.

This macro is used to define custom error values in mbed_error_code_t enumeration.

Parameters

error_name	Name of the error without the ERROR_ prefix
error_code	Error code value to be used, must be between 4097 and 65535(inclusive).

Definition at line 136 of file mbed_error.h.

Macro for defining a POSIX error status.

This macro is mainly used to define POSIX error values in mbed_error_code_t enumeration.

Parameters

error_name	Name of the error without the ERROR_ prefix
error_code	Error code value to be used, must be between 1 and 255(inclusive).

Definition at line 116 of file mbed_error.h.

Macro for defining a System error status.

This macro is used to define System error values in mbed_error_code_t enumeration.

Parameters

error_name	Name of the error without the ERROR_ prefix
error_code	Error code value to be used, must be between 256 and 4096(inclusive).

Definition at line 126 of file mbed_error.h.

Macros for setting a fatal system error.

These macros will log the error, prints the error report and halts the system. Its a wrapper for calling mbed_error API. There are 2 versions of this macro. MBED_ERROR takes status and message. MBED_ERROR1 takes an additional context specific argument

Parameters

error_status	mbed_error_status_t status to be set(See mbed_error_status_t enum above for available error status values).
error_msg	The error message to be printed out to STDIO/Serial.
error_value	Value associated with the error status. This would depend on error code/error scenario. Only available with MBED_ERROR1

Returns

Does not return

Note

The macro calls mbed_error API with filename and line number info without caller explicitly passing them. Since this macro is a wrapper for mbed_error API callers should process the return value from this macro which is the return value from calling mbed_error API.

Definition at line 197 of file mbed_error.h.

Call this Macro to generate a mbed_error_status_t value for a Custom error.

Parameters

module	Module generating the error code. If its unknown, pass MBED_MODULE_UNKNOWN. See mbed_module_type_t for module types.
error_code	The mbed_error_code_t code to be used in generating the mbed_error_status_t. See mbed_error_code_t for error codes.

Note

This macro generate mbed_error_status_t-es with error type set to MBED_ERROR_TYPE_CUSTOM

Definition at line 924 of file mbed_error.h.

Call this Macro to generate a mbed_error_status_t value for a System error.

Parameters

module	Module generating the error code. If its unknown, pass MBED_MODULE_UNKNOWN. See mbed_module_type_t for module types.
error_code	The mbed_error_code_t code to be used in generating the mbed_error_status_t. See mbed_error_code_t for error codes.

Note

This macro generate mbed_error_status_t-es with error type set to MBED_ERROR_TYPE_SYSTEM

Definition at line 939 of file mbed_error.h.

Call this Macro to generate a mbed_error_status_t value for a System error.

Parameters

module	Module generating the error code. If its unknown, pass MBED_MODULE_UNKNOWN. See mbed_module_type_t for module types.
error_code	The mbed_error_code_t code to be used in generating the mbed_error_status_t. See mbed_error_code_t for error codes.

Note

This macro generate mbed_error_status_t-es with error type set to MBED_ERROR_TYPE_SYSTEM

Definition at line 909 of file mbed_error.h.

Macros for setting a system warning.

These macros will log the error, Its a wrapper for calling mbed_warning API. There are 2 versions of this macro. MBED_WARNING takes status and message. MBED_WARNING1 takes an additional context specific argument

Parameters

error_status	mbed_error_status_t status to be set(See mbed_error_status_t enum above for available error status values).
error_msg	The error message to be printed out to STDIO/Serial.
error_value	Value associated with the error status. This would depend on error code/error scenario.

Note

The macro calls mbed_warning API with filename and line number info without caller explicitly passing them. Since this macro is a wrapper for mbed_warning API callers should process the return value from this macro which is the return value from calling mbed_error API.

Definition at line 166 of file mbed_error.h.

mbed_error_code_t definition

mbed_error_code_t enumeration defines the Error codes and Error status values for MBED_MODULE_UNKNOWN.
It defines all of POSIX Error Codes/Statuses and Mbed System Error Codes/Statuses.

Note

POSIX Error codes are defined using the macro MBED_DEFINE_POSIX_ERROR
For example MBED_DEFINE_POSIX_ERROR( EPERM, EPERM ). This effectively defines the following values:
ERROR_CODE_EPERM = EPERM
ERROR_EPERM = -EPERM
POSIX Error codes are defined using the macro MBED_DEFINE_POSIX_ERROR
For example MBED_DEFINE_POSIX_ERROR( EPERM, EPERM ). This macro defines the following values:
ERROR_CODE_EPERM = MBED_POSIX_ERROR_BASE+EPERM
ERROR_EPERM = -(MBED_POSIX_ERROR_BASE+EPERM)
Its effectively equivalent to:
ERROR_CODE_EPERM = 1
ERROR_EPERM = -1
All POSIX error codes currently supported by MbedOS(defined in mbed_retarget.h) are defined using the MBED_DEFINE_POSIX_ERROR macro.

Below are the POSIX error codes and the description:

EPERM                      1        Operation not permitted
ENOENT                     2        No such file or directory
ESRCH                      3        No such process
EINTR                      4        Interrupted system call
EIO                        5        I/O error
ENXIO                      6        No such device or address
E2BIG                      7        Argument list too long
ENOEXEC                    8        Exec format error
EBADF                      9        Bad file number
ECHILD                     10       No child processes
EAGAIN                     11       Try again
ENOMEM                     12       Out of memory
EACCES                     13       Permission denied
EFAULT                     14       Bad address
ENOTBLK                    15       Block device required
EBUSY                      16       Device or resource busy
EEXIST                     17       File exists
EXDEV                      18       Cross-device link
ENODEV                     19       No such device
ENOTDIR                    20       Not a directory
EISDIR                     21       Is a directory
EINVAL                     22       Invalid argument
ENFILE                     23       File table overflow
EMFILE                     24       Too many open files
ENOTTY                     25       Not a typewriter
ETXTBSY                    26       Text file busy
EFBIG                      27       File too large
ENOSPC                     28       No space left on device
ESPIPE                     29       Illegal seek
EROFS                      30       Read-only file system
EMLINK                     31       Too many links
EPIPE                      32       Broken pipe
EDOM                       33       Math argument out of domain of func
ERANGE                     34       Math result not representable
EDEADLK                    35       Resource deadlock would occur
ENAMETOOLONG               36       File name too long
ENOLCK                     37       No record locks available
ENOSYS                     38       Function not implemented
ENOTEMPTY                  39       Directory not empty
ELOOP                      40       Too many symbolic links encountered
EWOULDBLOCK                EAGAIN   Operation would block
ENOMSG                     42       No message of desired type
EIDRM                      43       Identifier removed
ECHRNG                     44       Channel number out of range
EL2NSYNC                   45       Level 2 not synchronized
EL3HLT                     46       Level 3 halted
EL3RST                     47       Level 3 reset
ELNRNG                     48       Link number out of range
EUNATCH                    49       Protocol driver not attached
ENOCSI                     50       No CSI structure available
EL2HLT                     51       Level 2 halted
EBADE                      52       Invalid exchange
EBADR                      53       Invalid request descriptor
EXFULL                     54       Exchange full
ENOANO                     55       No anode
EBADRQC                    56       Invalid request code
EBADSLT                    57       Invalid slot
EDEADLOCK                  EDEADLK  Resource deadlock would occur
EBFONT                     59       Bad font file format
ENOSTR                     60       Device not a stream
ENODATA                    61       No data available
ETIME                      62       Timer expired
ENOSR                      63       Out of streams resources
ENONET                     64       Machine is not on the network
ENOPKG                     65       Package not installed
EREMOTE                    66       Object is remote
ENOLINK                    67       Link has been severed
EADV                       68       Advertise error
ESRMNT                     69       Srmount error
ECOMM                      70       Communication error on send
EPROTO                     71       Protocol error
EMULTIHOP                  72       Multihop attempted
EDOTDOT                    73       RFS specific error
EBADMSG                    74       Not a data message
EOVERFLOW                  75       Value too large for defined data type
ENOTUNIQ                   76       Name not unique on network
EBADFD                     77       File descriptor in bad state
EREMCHG                    78       Remote address changed
ELIBACC                    79       Can not access a needed shared library
ELIBBAD                    80       Accessing a corrupted shared library
ELIBSCN                    81       .lib section in a.out corrupted
ELIBMAX                    82       Attempting to link in too many shared libraries
ELIBEXEC                   83       Cannot exec a shared library directly
EILSEQ                     84       Illegal byte sequence
ERESTART                   85       Interrupted system call should be restarted
ESTRPIPE                   86       Streams pipe error
EUSERS                     87       Too many users
ENOTSOCK                   88       Socket operation on non-socket
EDESTADDRREQ               89       Destination address required
EMSGSIZE                   90       Message too long
EPROTOTYPE                 91       Protocol wrong type for socket
ENOPROTOOPT                92       Protocol not available
EPROTONOSUPPORT            93       Protocol not supported
ESOCKTNOSUPPORT            94       Socket type not supported
EOPNOTSUPP                 95       Operation not supported on transport endpoint
EPFNOSUPPORT               96       Protocol family not supported
EAFNOSUPPORT               97       Address family not supported by protocol
EADDRINUSE                 98       Address already in use
EADDRNOTAVAIL              99       Cannot assign requested address
ENETDOWN                   100      Network is down
ENETUNREACH                101      Network is unreachable
ENETRESET                  102      Network dropped connection because of reset
ECONNABORTED               103      Software caused connection abort
ECONNRESET                 104      Connection reset by peer
ENOBUFS                    105      No buffer space available
EISCONN                    106      Transport endpoint is already connected
ENOTCONN                   107      Transport endpoint is not connected
ESHUTDOWN                  108      Cannot send after transport endpoint shutdown
ETOOMANYREFS               109      Too many references: cannot splice
ETIMEDOUT                  110      Connection timed out
ECONNREFUSED               111      Connection refused
EHOSTDOWN                  112      Host is down
EHOSTUNREACH               113      No route to host
EALREADY                   114      Operation already in progress
EINPROGRESS                115      Operation now in progress
ESTALE                     116      Stale NFS file handle
EUCLEAN                    117      Structure needs cleaning
ENOTNAM                    118      Not a XENIX named type file
ENAVAIL                    119      No XENIX semaphores available
EISNAM                     120      Is a named type file
EREMOTEIO                  121      Remote I/O error
EDQUOT                     122      Quota exceeded
ENOMEDIUM                  123      No medium found
EMEDIUMTYPE                124      Wrong medium type
ECANCELED                  125      Operation Canceled
ENOKEY                     126      Required key not available
EKEYEXPIRED                127      Key has expired
EKEYREVOKED                128      Key has been revoked
EKEYREJECTED               129      Key was rejected by service
EOWNERDEAD                 130      Owner died
ENOTRECOVERABLE            131      State not recoverable

MbedOS System Error codes are defined using the macro MBED_DEFINE_SYSTEM_ERROR
For example MBED_DEFINE_SYSTEM_ERROR( INVALID_ARGUMENT ,1 ) macro defines the following values:
ERROR_CODE_INVALID_ARGUMENT = MBED_SYSTEM_ERROR_BASE+1
ERROR_INVALID_ARGUMENT = MAKE_MBED_ERROR(ERROR_TYPE_SYSTEM, MBED_MODULE_UNKNOWN, ERROR_CODE_INVALID_ARGUMENT)
Its effectively equivalent to:
ERROR_CODE_INVALID_ARGUMENT = 1
ERROR_INVALID_ARGUMENT = 0x80FF0001
(Note that MODULE field is set to MBED_MODULE_UNKNOWN) New System Error codes should be defined using MBED_DEFINE_SYSTEM_ERROR macro and must have an unique error code value
passed as the second argument in the MBED_DEFINE_SYSTEM_ERROR macro.

Below are the Mbed System error codes and the description:

UNKNOWN                    256      Unknown error
INVALID_ARGUMENT           257      Invalid Argument
INVALID_DATA               258      Invalid data
INVALID_FORMAT             259      Invalid format
INVALID_INDEX              260      Invalid Index
INVALID_SIZE               261      Invalid Size
INVALID_OPERATION          262      Invalid Operation
NOT_FOUND                  263      Not Found
ACCESS_DENIED              264      Access Denied
NOT_SUPPORTED              265      Not supported
BUFFER_FULL                266      Buffer Full
MEDIA_FULL                 267      Media/Disk Full
ALREADY_IN_USE             268      Already in use
TIMEOUT                    269      Timeout error
NOT_READY                  270      Not Ready
FAILED_OPERATION           271      Requested Operation failed
OPERATION_PROHIBITED       272      Operation prohibited
OPERATION_ABORTED          273      Operation failed
WRITE_PROTECTED            274      Attempt to write to write-protected resource
NO_RESPONSE                275      No response
SEMAPHORE_LOCK_FAILED      276      Semaphore lock failed
MUTEX_LOCK_FAILED          277      Mutex lock failed
SEMAPHORE_UNLOCK_FAILED    278      Semaphore unlock failed
MUTEX_UNLOCK_FAILED        279      Mutex unlock failed
CRC_ERROR                  280      CRC error or mismatch
OPEN_FAILED                281      Open failed
CLOSE_FAILED               282      Close failed
READ_FAILED                283      Read failed
WRITE_FAILED               284      Write failed
INITIALIZATION_FAILED      285      Initialization failed
BOOT_FAILURE               286      Boot failure
OUT_OF_MEMORY              287      Out of memory
OUT_OF_RESOURCES           288      Out of resources
ALLOC_FAILED               289      Alloc failed
FREE_FAILED                290      Free failed
OVERFLOW                   291      Overflow error
UNDERFLOW                  292      Underflow error
STACK_OVERFLOW             293      Stack overflow error
ISR_QUEUE_OVERFLOW         294      ISR queue overflow
TIMER_QUEUE_OVERFLOW       295      Timer Queue overflow
CLIB_SPACE_UNAVAILABLE     296      Standard library error - Space unavailable
CLIB_EXCEPTION             297      Standard library error - Exception
CLIB_MUTEX_INIT_FAILURE    298      Standard library error - Mutex Init failure
CREATE_FAILED              299      Create failed
DELETE_FAILED              300      Delete failed
THREAD_CREATE_FAILED       301      Thread Create failed
THREAD_DELETE_FAILED       302      Thread Delete failed
PROHIBITED_IN_ISR_CONTEXT  303      Operation Prohibited in ISR context
PINMAP_INVALID             304      Pinmap Invalid
RTOS_EVENT                 305      Unknown Rtos Error
RTOS_THREAD_EVENT          306      Rtos Thread Error
RTOS_MUTEX_EVENT           307      Rtos Mutex Error
RTOS_SEMAPHORE_EVENT       308      Rtos Semaphore Error
RTOS_MEMORY_POOL_EVENT     309      Rtos Memory Pool Error
RTOS_TIMER_EVENT           310      Rtos Timer Error
RTOS_EVENT_FLAGS_EVENT     311      Rtos Event flags Error
RTOS_MESSAGE_QUEUE_EVENT   312      Rtos Message queue Error
DEVICE_BUSY                313      Device Busy
CONFIG_UNSUPPORTED         314      Configuration not supported
CONFIG_MISMATCH            315      Configuration mismatch
ALREADY_INITIALIZED        316      Already initialized
HARDFAULT_EXCEPTION        317      HardFault exception
MEMMANAGE_EXCEPTION        318      MemManage exception
BUSFAULT_EXCEPTION         319      BusFault exception
USAGEFAULT_EXCEPTION       320      UsageFault exception
BLE_NO_FRAME_INITIALIZED,  321      BLE No frame initialized
BLE_BACKEND_CREATION_FAILED 322     BLE Backend creation failed
BLE_BACKEND_NOT_INITIALIZED 323     BLE Backend not initialized
ASSERTION_FAILED           324      Assertion Failed
AUTHENTICATION_FAILED      325      Authentication Failed
RBP_AUTHENTICATION_FAILED  326      Rollback Protect Authentication Failed

Custom Error codes can be defined using the macro DEFINE_CUSTOM_ERROR
This is mainly meant to capture non-generic error codes specific to a device. For example DEFINE_CUSTOM_ERROR( MY_CUSTOM_ERROR ,1 ) macro defines the following values:
ERROR_CODE_MY_CUSTOM_ERROR = MBED_CUSTOM_ERROR_BASE+1
ERROR_MY_CUSTOM_ERROR = MAKE_MBED_ERROR(ERROR_TYPE_CUSTOM, MBED_MODULE_UNKNOWN, ERROR_CODE_MY_CUSTOM_ERROR)
Its effectively equivalent to:
ERROR_CODE_MY_CUSTOM_ERROR = 4097
ERROR_MY_CUSTOM_ERROR = 0xA0FF1001
(Note that MODULE field is set to MBED_MODULE_UNKNOWN)

Using error codes:
POSIX error codes may be used in modules/functions currently using POSIX error codes and switching them to Mbed-OS error codes may cause interoperability issues. For example, some of the filesystem, network stack implementations may need to use POSIX error codes in order to keep them compatible with other modules interfacing with them, and may continue to use POSIX error codes.

In all other cases, like for any native development of Mbed-OS modules Mbed-OS error codes should be used. This makes it easy to use Mbed-OS error reporting/logging infrastructure and makes debugging error scenarios much more efficient.

Note

Searching for error codes in mbed-os source tree:
If you get an error report as below which you want to search for in mbed-os source tree, first take note of "Error Code" number.
For example, the below error report has an error code of 259. Find the error name associated with the error code and in this case its INVALID_FORMAT.
Use that error name(INVALID_FORMAT) to search the source tree for code locations setting that specific error code.
If the Error module reported is not 255(which indicates unknown module), you can also use that to narrow down to the specific component reporting the error. See mbed_module_type_t enum above for module mapping.

++ MbedOS Error Info ++
Error Status: 0x80FF013D Code: 317 Module: 255
Error Message: Fault exception
Location: 0x5CD1
Error Value: 0x4A2A
Current Thread: Id: 0x20001E80 Entry: 0x5EB1 StackSize: 0x1000 StackMem: 0x20000E80 SP: 0x2002FF90
For more info, visit: https://mbed.com/s/error?error=0x80FF013D&mbedos=999999&core=0x410FC241&compile=1&ver=5060528
-- MbedOS Error Info --

mbed_error_ctx struct

This struct captures the context information at the time of error.
It primarily contains information about the thread where the error originated,
filename/line number of the source file where the error occurred, a context specific error value(error_value)
and the address where the error originated.

Note

Below are the members of mbed_error_ctx struct
error_status mbed_error_status_t value for this error
error_function_address Address where the error occurred
thread_id ID of the thread which generated the error
thread_entry_address Entry function of the thread which generated the error
thread_stack_size Stack Size of the thread which generated the error
thread_stack_mem Stack Top of the thread which generated the error
thread_current_sp Current Stack Pointer of the thread which generated the error
error_value A context/error specific value associated with this error
error_filename Filename where the error originated
error_line_number Line number in error_filename where the error originated

Callback/Error hook function prototype.

Applications needing a callback when an error is reported can use mbed_set_error_hook function to register a callback/error hook function using the following prototype. When an error happens in the system error handling implementation will invoke this callback with the mbed_error_status_t reported and the error context at the time of error.

Parameters

error_ctx

Error context structure associated with this error.

Returns

void

Definition at line 949 of file mbed_error.h.

mbed_error_status_t description

mbed_error_status_t type represents the error status values under MbedOS. mbed_error_status_t values are signed integers and always be negative.
Internally its encoded as below with bit-fields representing error type, module and error code:

mbed_error_status_t Status Encoding:

| 31 Always Negative | 30-29(2 bits)  | 28-24              | 23-16(8 bits) | 15-0(16 bits) |
| -1                 | TYPE           | (unused/reserved)  | MODULE TYPE   | ERROR CODE    |

The error status value range for each error type is as follows:
POSIX Error Status-es - 0xFFFFFFFF to 0xFFFFFF01(-1 -255) - This corresponds to POSIX error codes represented as negative.
System Error Status-es - 0x80XX0100 to 0x80XX0FFF - This corresponds to System error codes range(all values are negative). Bits 23-16 will be module type(marked with XX)
Custom Error Status-es - 0xA0XX1000 to 0xA0XXFFFF - This corresponds to Custom error codes range(all values are negative). Bits 23-16 will be module type(marked with XX)

The ERROR CODE(values encoded into ERROR CODE bit-field in mbed_error_status_t) value range for each error type is also separated as below:
POSIX Error Codes - 1 to 255.
System Error Codes - 256 to 4095.
Custom Error Codes - 4096 to 65535.

Note

POSIX error codes are always encoded as negative of their actual value. For example, EPERM is encoded as -EPERM. And, the MODULE TYPE for POSIX error codes are always encoded as MBED_MODULE_UNKNOWN.
This is to enable easy injection of POSIX error codes into MbedOS error handling system without altering the actual POSIX error values.
Accordingly, POSIX error codes are represented as -1 to -255 under MbedOS error status representation.

Definition at line 108 of file mbed_error.h.

mbed_error_type_t definition

Note

This enumeration defines the Error types supported. The value of these enum values will be encoded into mbed_error_status_t TYPE field.
See mbed_error_status_t description for more info.
MBED_ERROR_TYPE_SYSTEM - Used to indicate that the error status is of System defined Error type.
MBED_ERROR_TYPE_CUSTOM - Used to indicate that the error status is of Custom defined Error type.
MBED_ERROR_TYPE_POSIX - Used to indicate that the error status is of POSIX error type.

mbed_module_type_t definition

Note

This enumeration defines the module types. The value of these enum values will be encoded into mbed_error_status_t MODULE field.

See mbed_error_status_t description for more info.
MBED_MODULE_UNKNOWN - This module type can be used if caller of the mbed_error/mbed_warning doesn't know who is the actual originator of the error.
Other module values can be used to provide more info on who/where the error originated from.

For example, if I2C driver is the component originating the error you can use MBED_MODULE_DRIVER_I2C to provide more info.
Its used in call to MBED_MAKE_ERROR/MBED_MAKE_SYSTEM_ERROR/MBED_MAKE_CUSTOM_ERROR macros.

1 Example: mbed_error_status_t i2c_driver_error = MBED_MAKE_ERROR( MBED_MODULE_DRIVER_I2C, MBED_ERROR_CONFIG_UNSUPPORTED );

Below are the module code mappings:

 MBED_MODULE_APPLICATION                     0       Application
 MBED_MODULE_PLATFORM                        1       Platform
 MBED_MODULE_KERNEL                          2       RTX Kernel
 MBED_MODULE_NETWORK_STACK                   3       Network stack
 MBED_MODULE_HAL                             4       HAL - Hardware Abstraction Layer
 MBED_MODULE_MEMORY_SUBSYSTEM                5       Memory Subsystem
 MBED_MODULE_FILESYSTEM                      6       Filesystem
 MBED_MODULE_BLOCK_DEVICE                    7       Block device
 MBED_MODULE_DRIVER                          8       Driver
 MBED_MODULE_DRIVER_SERIAL                   9       Serial Driver
 MBED_MODULE_DRIVER_RTC                      10      RTC Driver
 MBED_MODULE_DRIVER_I2C                      11      I2C Driver
 MBED_MODULE_DRIVER_SPI                      12      SPI Driver
 MBED_MODULE_DRIVER_GPIO                     13      GPIO Driver
 MBED_MODULE_DRIVER_ANALOG                   14      Analog Driver
 MBED_MODULE_DRIVER_DIGITAL                  15      DigitalIO Driver
 MBED_MODULE_DRIVER_CAN                      16      CAN Driver
 MBED_MODULE_DRIVER_ETHERNET                 17      Ethernet Driver
 MBED_MODULE_DRIVER_CRC                      18      CRC Module
 MBED_MODULE_DRIVER_PWM                      19      PWM Driver
 MBED_MODULE_DRIVER_QSPI                     20      QSPI Driver
 MBED_MODULE_DRIVER_USB                      21      USB Driver
 MBED_MODULE_TARGET_SDK                      22      SDK
 MBED_MODULE_BLE                             23      BLE
 MBED_MODULE_NETWORK_STATS                   24      Network Statistics

 MBED_MODULE_UNKNOWN                         255     Unknown module

mbed_error_code_t definition

mbed_error_code_t enumeration defines the Error codes and Error status values for MBED_MODULE_UNKNOWN.
It defines all of POSIX Error Codes/Statuses and Mbed System Error Codes/Statuses.

Note

POSIX Error codes are defined using the macro MBED_DEFINE_POSIX_ERROR
For example MBED_DEFINE_POSIX_ERROR( EPERM, EPERM ). This effectively defines the following values:
ERROR_CODE_EPERM = EPERM
ERROR_EPERM = -EPERM
POSIX Error codes are defined using the macro MBED_DEFINE_POSIX_ERROR
For example MBED_DEFINE_POSIX_ERROR( EPERM, EPERM ). This macro defines the following values:
ERROR_CODE_EPERM = MBED_POSIX_ERROR_BASE+EPERM
ERROR_EPERM = -(MBED_POSIX_ERROR_BASE+EPERM)
Its effectively equivalent to:
ERROR_CODE_EPERM = 1
ERROR_EPERM = -1
All POSIX error codes currently supported by MbedOS(defined in mbed_retarget.h) are defined using the MBED_DEFINE_POSIX_ERROR macro.

Below are the POSIX error codes and the description:

EPERM                      1        Operation not permitted
ENOENT                     2        No such file or directory
ESRCH                      3        No such process
EINTR                      4        Interrupted system call
EIO                        5        I/O error
ENXIO                      6        No such device or address
E2BIG                      7        Argument list too long
ENOEXEC                    8        Exec format error
EBADF                      9        Bad file number
ECHILD                     10       No child processes
EAGAIN                     11       Try again
ENOMEM                     12       Out of memory
EACCES                     13       Permission denied
EFAULT                     14       Bad address
ENOTBLK                    15       Block device required
EBUSY                      16       Device or resource busy
EEXIST                     17       File exists
EXDEV                      18       Cross-device link
ENODEV                     19       No such device
ENOTDIR                    20       Not a directory
EISDIR                     21       Is a directory
EINVAL                     22       Invalid argument
ENFILE                     23       File table overflow
EMFILE                     24       Too many open files
ENOTTY                     25       Not a typewriter
ETXTBSY                    26       Text file busy
EFBIG                      27       File too large
ENOSPC                     28       No space left on device
ESPIPE                     29       Illegal seek
EROFS                      30       Read-only file system
EMLINK                     31       Too many links
EPIPE                      32       Broken pipe
EDOM                       33       Math argument out of domain of func
ERANGE                     34       Math result not representable
EDEADLK                    35       Resource deadlock would occur
ENAMETOOLONG               36       File name too long
ENOLCK                     37       No record locks available
ENOSYS                     38       Function not implemented
ENOTEMPTY                  39       Directory not empty
ELOOP                      40       Too many symbolic links encountered
EWOULDBLOCK                EAGAIN   Operation would block
ENOMSG                     42       No message of desired type
EIDRM                      43       Identifier removed
ECHRNG                     44       Channel number out of range
EL2NSYNC                   45       Level 2 not synchronized
EL3HLT                     46       Level 3 halted
EL3RST                     47       Level 3 reset
ELNRNG                     48       Link number out of range
EUNATCH                    49       Protocol driver not attached
ENOCSI                     50       No CSI structure available
EL2HLT                     51       Level 2 halted
EBADE                      52       Invalid exchange
EBADR                      53       Invalid request descriptor
EXFULL                     54       Exchange full
ENOANO                     55       No anode
EBADRQC                    56       Invalid request code
EBADSLT                    57       Invalid slot
EDEADLOCK                  EDEADLK  Resource deadlock would occur
EBFONT                     59       Bad font file format
ENOSTR                     60       Device not a stream
ENODATA                    61       No data available
ETIME                      62       Timer expired
ENOSR                      63       Out of streams resources
ENONET                     64       Machine is not on the network
ENOPKG                     65       Package not installed
EREMOTE                    66       Object is remote
ENOLINK                    67       Link has been severed
EADV                       68       Advertise error
ESRMNT                     69       Srmount error
ECOMM                      70       Communication error on send
EPROTO                     71       Protocol error
EMULTIHOP                  72       Multihop attempted
EDOTDOT                    73       RFS specific error
EBADMSG                    74       Not a data message
EOVERFLOW                  75       Value too large for defined data type
ENOTUNIQ                   76       Name not unique on network
EBADFD                     77       File descriptor in bad state
EREMCHG                    78       Remote address changed
ELIBACC                    79       Can not access a needed shared library
ELIBBAD                    80       Accessing a corrupted shared library
ELIBSCN                    81       .lib section in a.out corrupted
ELIBMAX                    82       Attempting to link in too many shared libraries
ELIBEXEC                   83       Cannot exec a shared library directly
EILSEQ                     84       Illegal byte sequence
ERESTART                   85       Interrupted system call should be restarted
ESTRPIPE                   86       Streams pipe error
EUSERS                     87       Too many users
ENOTSOCK                   88       Socket operation on non-socket
EDESTADDRREQ               89       Destination address required
EMSGSIZE                   90       Message too long
EPROTOTYPE                 91       Protocol wrong type for socket
ENOPROTOOPT                92       Protocol not available
EPROTONOSUPPORT            93       Protocol not supported
ESOCKTNOSUPPORT            94       Socket type not supported
EOPNOTSUPP                 95       Operation not supported on transport endpoint
EPFNOSUPPORT               96       Protocol family not supported
EAFNOSUPPORT               97       Address family not supported by protocol
EADDRINUSE                 98       Address already in use
EADDRNOTAVAIL              99       Cannot assign requested address
ENETDOWN                   100      Network is down
ENETUNREACH                101      Network is unreachable
ENETRESET                  102      Network dropped connection because of reset
ECONNABORTED               103      Software caused connection abort
ECONNRESET                 104      Connection reset by peer
ENOBUFS                    105      No buffer space available
EISCONN                    106      Transport endpoint is already connected
ENOTCONN                   107      Transport endpoint is not connected
ESHUTDOWN                  108      Cannot send after transport endpoint shutdown
ETOOMANYREFS               109      Too many references: cannot splice
ETIMEDOUT                  110      Connection timed out
ECONNREFUSED               111      Connection refused
EHOSTDOWN                  112      Host is down
EHOSTUNREACH               113      No route to host
EALREADY                   114      Operation already in progress
EINPROGRESS                115      Operation now in progress
ESTALE                     116      Stale NFS file handle
EUCLEAN                    117      Structure needs cleaning
ENOTNAM                    118      Not a XENIX named type file
ENAVAIL                    119      No XENIX semaphores available
EISNAM                     120      Is a named type file
EREMOTEIO                  121      Remote I/O error
EDQUOT                     122      Quota exceeded
ENOMEDIUM                  123      No medium found
EMEDIUMTYPE                124      Wrong medium type
ECANCELED                  125      Operation Canceled
ENOKEY                     126      Required key not available
EKEYEXPIRED                127      Key has expired
EKEYREVOKED                128      Key has been revoked
EKEYREJECTED               129      Key was rejected by service
EOWNERDEAD                 130      Owner died
ENOTRECOVERABLE            131      State not recoverable

MbedOS System Error codes are defined using the macro MBED_DEFINE_SYSTEM_ERROR
For example MBED_DEFINE_SYSTEM_ERROR( INVALID_ARGUMENT ,1 ) macro defines the following values:
ERROR_CODE_INVALID_ARGUMENT = MBED_SYSTEM_ERROR_BASE+1
ERROR_INVALID_ARGUMENT = MAKE_MBED_ERROR(ERROR_TYPE_SYSTEM, MBED_MODULE_UNKNOWN, ERROR_CODE_INVALID_ARGUMENT)
Its effectively equivalent to:
ERROR_CODE_INVALID_ARGUMENT = 1
ERROR_INVALID_ARGUMENT = 0x80FF0001
(Note that MODULE field is set to MBED_MODULE_UNKNOWN) New System Error codes should be defined using MBED_DEFINE_SYSTEM_ERROR macro and must have an unique error code value
passed as the second argument in the MBED_DEFINE_SYSTEM_ERROR macro.

Below are the Mbed System error codes and the description:

UNKNOWN                    256      Unknown error
INVALID_ARGUMENT           257      Invalid Argument
INVALID_DATA               258      Invalid data
INVALID_FORMAT             259      Invalid format
INVALID_INDEX              260      Invalid Index
INVALID_SIZE               261      Invalid Size
INVALID_OPERATION          262      Invalid Operation
NOT_FOUND                  263      Not Found
ACCESS_DENIED              264      Access Denied
NOT_SUPPORTED              265      Not supported
BUFFER_FULL                266      Buffer Full
MEDIA_FULL                 267      Media/Disk Full
ALREADY_IN_USE             268      Already in use
TIMEOUT                    269      Timeout error
NOT_READY                  270      Not Ready
FAILED_OPERATION           271      Requested Operation failed
OPERATION_PROHIBITED       272      Operation prohibited
OPERATION_ABORTED          273      Operation failed
WRITE_PROTECTED            274      Attempt to write to write-protected resource
NO_RESPONSE                275      No response
SEMAPHORE_LOCK_FAILED      276      Semaphore lock failed
MUTEX_LOCK_FAILED          277      Mutex lock failed
SEMAPHORE_UNLOCK_FAILED    278      Semaphore unlock failed
MUTEX_UNLOCK_FAILED        279      Mutex unlock failed
CRC_ERROR                  280      CRC error or mismatch
OPEN_FAILED                281      Open failed
CLOSE_FAILED               282      Close failed
READ_FAILED                283      Read failed
WRITE_FAILED               284      Write failed
INITIALIZATION_FAILED      285      Initialization failed
BOOT_FAILURE               286      Boot failure
OUT_OF_MEMORY              287      Out of memory
OUT_OF_RESOURCES           288      Out of resources
ALLOC_FAILED               289      Alloc failed
FREE_FAILED                290      Free failed
OVERFLOW                   291      Overflow error
UNDERFLOW                  292      Underflow error
STACK_OVERFLOW             293      Stack overflow error
ISR_QUEUE_OVERFLOW         294      ISR queue overflow
TIMER_QUEUE_OVERFLOW       295      Timer Queue overflow
CLIB_SPACE_UNAVAILABLE     296      Standard library error - Space unavailable
CLIB_EXCEPTION             297      Standard library error - Exception
CLIB_MUTEX_INIT_FAILURE    298      Standard library error - Mutex Init failure
CREATE_FAILED              299      Create failed
DELETE_FAILED              300      Delete failed
THREAD_CREATE_FAILED       301      Thread Create failed
THREAD_DELETE_FAILED       302      Thread Delete failed
PROHIBITED_IN_ISR_CONTEXT  303      Operation Prohibited in ISR context
PINMAP_INVALID             304      Pinmap Invalid
RTOS_EVENT                 305      Unknown Rtos Error
RTOS_THREAD_EVENT          306      Rtos Thread Error
RTOS_MUTEX_EVENT           307      Rtos Mutex Error
RTOS_SEMAPHORE_EVENT       308      Rtos Semaphore Error
RTOS_MEMORY_POOL_EVENT     309      Rtos Memory Pool Error
RTOS_TIMER_EVENT           310      Rtos Timer Error
RTOS_EVENT_FLAGS_EVENT     311      Rtos Event flags Error
RTOS_MESSAGE_QUEUE_EVENT   312      Rtos Message queue Error
DEVICE_BUSY                313      Device Busy
CONFIG_UNSUPPORTED         314      Configuration not supported
CONFIG_MISMATCH            315      Configuration mismatch
ALREADY_INITIALIZED        316      Already initialized
HARDFAULT_EXCEPTION        317      HardFault exception
MEMMANAGE_EXCEPTION        318      MemManage exception
BUSFAULT_EXCEPTION         319      BusFault exception
USAGEFAULT_EXCEPTION       320      UsageFault exception
BLE_NO_FRAME_INITIALIZED,  321      BLE No frame initialized
BLE_BACKEND_CREATION_FAILED 322     BLE Backend creation failed
BLE_BACKEND_NOT_INITIALIZED 323     BLE Backend not initialized
ASSERTION_FAILED           324      Assertion Failed
AUTHENTICATION_FAILED      325      Authentication Failed
RBP_AUTHENTICATION_FAILED  326      Rollback Protect Authentication Failed

Custom Error codes can be defined using the macro DEFINE_CUSTOM_ERROR
This is mainly meant to capture non-generic error codes specific to a device. For example DEFINE_CUSTOM_ERROR( MY_CUSTOM_ERROR ,1 ) macro defines the following values:
ERROR_CODE_MY_CUSTOM_ERROR = MBED_CUSTOM_ERROR_BASE+1
ERROR_MY_CUSTOM_ERROR = MAKE_MBED_ERROR(ERROR_TYPE_CUSTOM, MBED_MODULE_UNKNOWN, ERROR_CODE_MY_CUSTOM_ERROR)
Its effectively equivalent to:
ERROR_CODE_MY_CUSTOM_ERROR = 4097
ERROR_MY_CUSTOM_ERROR = 0xA0FF1001
(Note that MODULE field is set to MBED_MODULE_UNKNOWN)

Using error codes:
POSIX error codes may be used in modules/functions currently using POSIX error codes and switching them to Mbed-OS error codes may cause interoperability issues. For example, some of the filesystem, network stack implementations may need to use POSIX error codes in order to keep them compatible with other modules interfacing with them, and may continue to use POSIX error codes.

In all other cases, like for any native development of Mbed-OS modules Mbed-OS error codes should be used. This makes it easy to use Mbed-OS error reporting/logging infrastructure and makes debugging error scenarios much more efficient.

Note

Searching for error codes in mbed-os source tree:
If you get an error report as below which you want to search for in mbed-os source tree, first take note of "Error Code" number.
For example, the below error report has an error code of 259. Find the error name associated with the error code and in this case its INVALID_FORMAT.
Use that error name(INVALID_FORMAT) to search the source tree for code locations setting that specific error code.
If the Error module reported is not 255(which indicates unknown module), you can also use that to narrow down to the specific component reporting the error. See mbed_module_type_t enum above for module mapping.

++ MbedOS Error Info ++
Error Status: 0x80FF013D Code: 317 Module: 255
Error Message: Fault exception
Location: 0x5CD1
Error Value: 0x4A2A
Current Thread: Id: 0x20001E80 Entry: 0x5EB1 StackSize: 0x1000 StackMem: 0x20000E80 SP: 0x2002FF90
For more info, visit: https://mbed.com/s/error?error=0x80FF013D&mbedos=999999&core=0x410FC241&compile=1&ver=5060528
-- MbedOS Error Info --

Definition at line 588 of file mbed_error.h.

mbed_error_type_t definition

Note

This enumeration defines the Error types supported. The value of these enum values will be encoded into mbed_error_status_t TYPE field.
See mbed_error_status_t description for more info.
MBED_ERROR_TYPE_SYSTEM - Used to indicate that the error status is of System defined Error type.
MBED_ERROR_TYPE_CUSTOM - Used to indicate that the error status is of Custom defined Error type.
MBED_ERROR_TYPE_POSIX - Used to indicate that the error status is of POSIX error type.

Definition at line 212 of file mbed_error.h.

mbed_module_type_t definition

Note

This enumeration defines the module types. The value of these enum values will be encoded into mbed_error_status_t MODULE field.

See mbed_error_status_t description for more info.
MBED_MODULE_UNKNOWN - This module type can be used if caller of the mbed_error/mbed_warning doesn't know who is the actual originator of the error.
Other module values can be used to provide more info on who/where the error originated from.

For example, if I2C driver is the component originating the error you can use MBED_MODULE_DRIVER_I2C to provide more info.
Its used in call to MBED_MAKE_ERROR/MBED_MAKE_SYSTEM_ERROR/MBED_MAKE_CUSTOM_ERROR macros.

1 Example: mbed_error_status_t i2c_driver_error = MBED_MAKE_ERROR( MBED_MODULE_DRIVER_I2C, MBED_ERROR_CONFIG_UNSUPPORTED );

Below are the module code mappings:

 MBED_MODULE_APPLICATION                     0       Application
 MBED_MODULE_PLATFORM                        1       Platform
 MBED_MODULE_KERNEL                          2       RTX Kernel
 MBED_MODULE_NETWORK_STACK                   3       Network stack
 MBED_MODULE_HAL                             4       HAL - Hardware Abstraction Layer
 MBED_MODULE_MEMORY_SUBSYSTEM                5       Memory Subsystem
 MBED_MODULE_FILESYSTEM                      6       Filesystem
 MBED_MODULE_BLOCK_DEVICE                    7       Block device
 MBED_MODULE_DRIVER                          8       Driver
 MBED_MODULE_DRIVER_SERIAL                   9       Serial Driver
 MBED_MODULE_DRIVER_RTC                      10      RTC Driver
 MBED_MODULE_DRIVER_I2C                      11      I2C Driver
 MBED_MODULE_DRIVER_SPI                      12      SPI Driver
 MBED_MODULE_DRIVER_GPIO                     13      GPIO Driver
 MBED_MODULE_DRIVER_ANALOG                   14      Analog Driver
 MBED_MODULE_DRIVER_DIGITAL                  15      DigitalIO Driver
 MBED_MODULE_DRIVER_CAN                      16      CAN Driver
 MBED_MODULE_DRIVER_ETHERNET                 17      Ethernet Driver
 MBED_MODULE_DRIVER_CRC                      18      CRC Module
 MBED_MODULE_DRIVER_PWM                      19      PWM Driver
 MBED_MODULE_DRIVER_QSPI                     20      QSPI Driver
 MBED_MODULE_DRIVER_USB                      21      USB Driver
 MBED_MODULE_TARGET_SDK                      22      SDK
 MBED_MODULE_BLE                             23      BLE
 MBED_MODULE_NETWORK_STATS                   24      Network Statistics

 MBED_MODULE_UNKNOWN                         255     Unknown module

Definition at line 268 of file mbed_error.h.

To generate a fatal compile-time error, you can use the pre-processor error directive.

Parameters

format

C string that contains data stream to be printed. Code snippets below show valid format.

If the compiler evaluates this line, it will report the error and stop the compile.

For example, you could use this to check some user-defined compile-time variables:

Reporting Run-Time Errors: To generate a fatal run-time error, you can use the mbed error() function.

If the mbed running the program executes this function, it will print the message via the USB serial port, and then die with the blue lights of death!

The message can use printf-style formatting, so you can report variables in the message too. For example, you could use this to check a run-time condition:

Clears the last error, first error, error count and all entries in the error history.

Returns

0 or MBED_SUCCESS on success.

Call this function to set a fatal system error and halt the system.

This function will log the fatal error with the context info and prints the error report and halts the system.

Parameters

error_status	mbed_error_status_t status to be set(See mbed_error_status_t enum above for available error status values).
error_msg	The error message to be printed out to STDIO/Serial.
error_value	Value associated with the error status. This would depend on error code/error scenario.
filename	Name of the source file originating the error( Most callers can pass FILE here ).
line_number	The line number of the source file originating the error( Most callers can pass LINE here ) .

Returns

Does not return.

Note

See MBED_WARNING/MBED_ERROR macros which provides a wrapper on this API

Initialize error handling system, this is called by the mbed-os boot sequence.

This is not required to be called by Application unless the boot sequence is overridden by the system implementation. NOTE: If MBED_CONF_PLATFORM_FATAL_ERROR_AUTO_REBOOT_ENABLED is enabled and if the current reboot count exceeds MBED_CONF_PLATFORM_ERROR_REBOOT_MAX the system will halt when this function is called, and in such cases the caller will not get the control back. Also note that calling this function may trigger mbed_error_reboot_callback() if application side overides mbed_error_reboot_callback().

Returns

MBED_SUCCESS on success.

Callback function for reporting error context during boot up.

When MbedOS error handling system detects a fatal error it will auto-reboot the system(if MBED_CONF_PLATFORM_FATAL_ERROR_AUTO_REBOOT_ENABLED is enabled) after capturing the error info in special crash data RAM region. Once rebooted, MbedOS initialization routines will call this function with a pointer to the captured mbed_error_ctx structure. If application implementation needs to receive this callback, mbed_error_reboot_callback function should be overridden with custom implementation. By default it's defined as a WEAK function in mbed_error.c. Note that this callback will be invoked before the system starts executing main() function. So the implementation of the callback should be aware any resource limitations/availability of resources which are yet to be initialized by application main().

Parameters

error_ctx

Error context structure associated with this error.

Returns

void

Returns the number of system errors reported after boot.

Returns

int Number of errors reported.

Returns the current number of entries in the error history, if there has been more than max number of errors logged the number returned will be max depth of error history.

Returns

Current number of entries in the error history.

Reads the error context information for a specific error from error history, specified by the index.

Parameters

index	index of the error context entry in the history to be retrieved. The number of entries in the error history is configured during build and the max index depends on max depth of error history. index = 0 points to the oldest entry in the history, and index = (max history depth - 1) points to the latest entry in the error history.
error_info	This is the mbed_error_context info captured as part of the error history. The caller should pass a pointer to mbed_error_context struct allocated by the caller.

Returns

0 or MBED_SUCCESS on success. MBED_ERROR_INVALID_ARGUMENT in case of invalid index

Returns whether we are processing a fatal mbed error.

Returns

bool Whether a fatal error has occurred.

Returns the first system error reported.

Returns

mbed_error_status_t code logged for the first error or MBED_SUCCESS if no errors are logged.

Reads the first error context information captured.

Parameters

error_info

This is the mbed_error_context info captured as part of the first mbed_error call. The caller should pass a pointer to mbed_error_context struct allocated by the caller.

Returns

0 or MBED_SUCCESS on success. MBED_ERROR_INVALID_ARGUMENT in case of invalid index

Returns the most recent system error reported.

Returns

mbed_error_status_t code logged for the last error or MBED_SUCCESS if no errors are logged.

Reads the last error context information captured.

Parameters

error_info

This is the mbed_error_context info captured as part of the last mbed_error call. The caller should pass a pointer to mbed_error_context struct allocated by the caller.

Returns

0 or MBED_ERROR_SUCCESS on success. MBED_ERROR_INVALID_ARGUMENT in case of invalid index

Call this function to retrieve the error context after a fatal error which triggered a system reboot.

The function retrieves the error context stored in crash-report ram area which is preserved over reboot.

Parameters

error_info

Pointer to mbed_error_ctx struct allocated by the caller. This is the mbed_error_ctx info captured as part of the fatal error which triggered the reboot.

Returns

0 or MBED_SUCCESS on success. MBED_ERROR_INVALID_ARGUMENT in case of invalid error_info pointer MBED_ERROR_ITEM_NOT_FOUND if no reboot context is currently captured by the system

Generates a mbed_error_status_t value based on passed in values for type, module and error code.

Parameters

error_type	Error type based on mbed_error_type_t enum.
module	Module type based on mbed_module_type_t enum.
error_code	Error codes defined by mbed_error_code_t enum

Returns

0 or MBED_ERROR_SUCCESS on success.

Calling this function resets the current reboot count stored as part of error context captured in special crash data RAM region.

The function will also update the CRC value stored as part of error context accordingly.

Returns

MBED_SUCCESS on success. MBED_ERROR_ITEM_NOT_FOUND if no reboot context is currently captured by the system

Calling this function resets the current reboot context captured by the system(stored in special crash data RAM region).

Returns

MBED_SUCCESS on success. MBED_ERROR_ITEM_NOT_FOUND if no reboot context is currently captured by the system

Saves the error history information to a file.

Parameters

path	path to the file in the filesystem

Returns

0 or MBED_ERROR_SUCCESS on success. MBED_ERROR_WRITE_FAILED if writing to file failed MBED_ERROR_INVALID_ARGUMENT if path is not valid

Note

Filesystem support is required in order for this function to work.

Registers an application defined error callback with the error handling system.

This function will be called with error context info whenever system handles a mbed_error/mbed_warning call NOTE: This function should be implemented for re-entrancy as multiple threads may invoke mbed_error which may cause error hook to be called.

Parameters

custom_error_hook

mbed_error_status_t status to be set(See mbed_error_status_t enum above for available error status values).

Returns

0 or MBED_SUCCESS on success. MBED_ERROR_INVALID_ARGUMENT in case of NULL for custom_error_hook

Note

The erro hook function implementation should be re-entrant.

Call this function to set a system error/warning.

This function will log the error status with the context info and return to caller.

Parameters

error_status	mbed_error_status_t status to be set(See mbed_error_status_t enum above for available error status values).
error_msg	The error message to be printed out to STDIO/Serial.
error_value	Value associated with the error status. This would depend on error code/error scenario.
filename	Name of the source file originating the error( Most callers can pass FILE here ).
line_number	The line number of the source file originating the error( Most callers can pass LINE here ) .

Returns

0 or MBED_SUCCESS. MBED_ERROR_INVALID_ARGUMENT if called with invalid error status/codes

Note

See MBED_WARNING/MBED_ERROR macros which provides a wrapper on this API