Crt Mori / Logger

Logger library enables you to use unified interface to send out or receive data using one function with different parameters. You leave buffer overflows to this library as it handles it all.

Logger library howto guide.

Below is a simple program that outlines the usage of the logger library, The whole function was head-written so there might be some errors, but it is more for a live representation of usage than anything else. If someone would write a nice example program feel free to link it here.

simple usage of logger library

#include "mbed.h"
#include "logger.h"
#include "errno.h"

Ticker printout;
/**
 * \def STASH_BUFFER_LEN
 * size of stash buffer that can be used to store logged data
 */
#define STASH_BUFFER_LEN 70000
/// stash_buffer size
static char stash_buffer[STASH_BUFFER_LEN];

/**
 * Log_pop_periodic is periodically printing the messages until the buffer is empty. 
 * Once the buffer is empty it detaches and waits for another command.
*/
void log_pop_periodic(void)
{
    if( log_pop(L_BTSERIAL,stash_buffer,STASH_BUFFER_LEN) == 1 )
    {
        printout.detach();
    }
}

static int i=0;
static char read_buffer[20];
/**
 * read data from BT serial
*/
void read_from_BT()
{

    if (BTSerial.readable()) {
        read_buffer[i++] = BTSerial.getc();
        // if we read the desired character
        if (read_buffer[i-1] == 'p')
        {
            // start the printout process which will log_pop logged data
            printout.attach(&log_pop_periodic,0.5);
        }
    }    
}

int main()
{
    log_init(L_SERIAL);
    log_init(L_BTSERIAL);
    BTSerial.attach(&read_from_BT);

    // while loop to fill in loads of stinky data
    while (1) {
            // read something, then stash it
            log_stash(L_INFO,print_buffer,strlen(print_buffer),stash_buffer,STASH_BUFFER_LEN);
    }
}

errno.h

Committer:
Letme
Date:
2014-12-31
Revision:
5:f232b826e1f2
Parent:
0:272c70e2366c

File content as of revision 5:f232b826e1f2:

#ifndef _ASM_GENERIC_ERRNO_BASE_H
#define _ASM_GENERIC_ERRNO_BASE_H

#define EPERM        1  /* Operation not permitted */
#define ENOENT       2  /* No such file or directory */
#define ESRCH        3  /* No such process */
#define EINTR        4  /* Interrupted system call */
#define EIO          5  /* I/O error */
#define ENXIO        6  /* No such device or address */
#define E2BIG        7  /* Argument list too long */
#define ENOEXEC      8  /* Exec format error */
#define EBADF        9  /* Bad file number */
#define ECHILD      10  /* No child processes */
#define EAGAIN      11  /* Try again */
#define ENOMEM      12  /* Out of memory */
#define EACCES      13  /* Permission denied */
#define EFAULT      14  /* Bad address */
#define ENOTBLK     15  /* Block device required */
#define EBUSY       16  /* Device or resource busy */
#define EEXIST      17  /* File exists */
#define EXDEV       18  /* Cross-device link */
#define ENODEV      19  /* No such device */
#define ENOTDIR     20  /* Not a directory */
#define EISDIR      21  /* Is a directory */
#define EINVAL      22  /* Invalid argument */
#define ENFILE      23  /* File table overflow */
#define EMFILE      24  /* Too many open files */
#define ENOTTY      25  /* Not a typewriter */
#define ETXTBSY     26  /* Text file busy */
#define EFBIG       27  /* File too large */
#define ENOSPC      28  /* No space left on device */
#define ESPIPE      29  /* Illegal seek */
#define EROFS       30  /* Read-only file system */
#define EMLINK      31  /* Too many links */
#define EPIPE       32  /* Broken pipe */
#define EDOM        33  /* Math argument out of domain of func */
#define ERANGE      34  /* Math result not representable */

#endif