Andrew Boyson / Mbed 2 deprecated iot

Backing up an unused program in case of future need

Dependencies:   mbed

log.cpp@4:e076884ef8bd, 2016-05-03 (annotated)

Committer:
andrewboyson
Date:
Tue May 03 09:23:26 2016 +0000
Revision:
4:e076884ef8bd
Parent:
2:06fa34661f19
Child:
6:be97d38e0b01
Added 1-wire

Who changed what in which revision?

UserRevisionLine numberNew contents of line
andrewboyson 0:09f915e6f9f6 1 #include "mbed.h"
andrewboyson 0:09f915e6f9f6 2 #include <stdarg.h>
andrewboyson 0:09f915e6f9f6 3 #include "time.h"
andrewboyson 0:09f915e6f9f6 4 #define LOG_FILE "/local/log.txt"
andrewboyson 0:09f915e6f9f6 5 #define DATE_FORMAT "%05d "
andrewboyson 0:09f915e6f9f6 6
andrewboyson 0:09f915e6f9f6 7 LocalFileSystem local("local");
andrewboyson 0:09f915e6f9f6 8
andrewboyson 1:94282484baae 9 #define BUFFER_LENGTH 2048
andrewboyson 0:09f915e6f9f6 10 static char buffer[BUFFER_LENGTH];
andrewboyson 0:09f915e6f9f6 11 static char* pPush; //Initialised in init
andrewboyson 0:09f915e6f9f6 12 static char* pPull; //Initialised in init
andrewboyson 0:09f915e6f9f6 13 static int enable = true;
andrewboyson 0:09f915e6f9f6 14 static char* incrementPushPullPointer(char* p, char* buffer, int bufferLength)
andrewboyson 0:09f915e6f9f6 15 {
andrewboyson 0:09f915e6f9f6 16 p++; //increment the pointer by one
andrewboyson 0:09f915e6f9f6 17 if (p == buffer + bufferLength) p = buffer; //if the pointer is now beyond the end then point it back to the start
andrewboyson 0:09f915e6f9f6 18 return p;
andrewboyson 0:09f915e6f9f6 19 }
andrewboyson 0:09f915e6f9f6 20 void LogPush(char c)
andrewboyson 0:09f915e6f9f6 21 {
andrewboyson 0:09f915e6f9f6 22 //Only add if allowed
andrewboyson 0:09f915e6f9f6 23 if (!enable) return;
andrewboyson 0:09f915e6f9f6 24
andrewboyson 0:09f915e6f9f6 25 //Move the pull position if about to run into it
andrewboyson 0:09f915e6f9f6 26 char* pNext = incrementPushPullPointer(pPush, buffer, BUFFER_LENGTH);
andrewboyson 0:09f915e6f9f6 27 if (pNext == pPull) pPull = incrementPushPullPointer(pPull, buffer, BUFFER_LENGTH);
andrewboyson 0:09f915e6f9f6 28
andrewboyson 0:09f915e6f9f6 29 //Add the character at the push position
andrewboyson 0:09f915e6f9f6 30 *pPush = c;
andrewboyson 0:09f915e6f9f6 31 pPush = incrementPushPullPointer(pPush, buffer, BUFFER_LENGTH);
andrewboyson 0:09f915e6f9f6 32 }
andrewboyson 0:09f915e6f9f6 33 static char *pEnumerate;
andrewboyson 0:09f915e6f9f6 34 static int hadNull;
andrewboyson 0:09f915e6f9f6 35 void LogEnumerateStart()
andrewboyson 0:09f915e6f9f6 36 {
andrewboyson 0:09f915e6f9f6 37 pEnumerate = pPull;
andrewboyson 0:09f915e6f9f6 38 hadNull = false;
andrewboyson 0:09f915e6f9f6 39 }
andrewboyson 0:09f915e6f9f6 40 int LogEnumerate()
andrewboyson 0:09f915e6f9f6 41 {
andrewboyson 0:09f915e6f9f6 42 if (hadNull)
andrewboyson 0:09f915e6f9f6 43 {
andrewboyson 0:09f915e6f9f6 44 hadNull = false;
andrewboyson 0:09f915e6f9f6 45 return '0';
andrewboyson 0:09f915e6f9f6 46 }
andrewboyson 0:09f915e6f9f6 47 if (pEnumerate == pPush) return EOF;
andrewboyson 0:09f915e6f9f6 48 char c = *pEnumerate;
andrewboyson 0:09f915e6f9f6 49 pEnumerate = incrementPushPullPointer(pEnumerate, buffer, BUFFER_LENGTH);
andrewboyson 0:09f915e6f9f6 50 if (c)
andrewboyson 0:09f915e6f9f6 51 {
andrewboyson 0:09f915e6f9f6 52 return c;
andrewboyson 0:09f915e6f9f6 53 }
andrewboyson 0:09f915e6f9f6 54 else
andrewboyson 0:09f915e6f9f6 55 {
andrewboyson 0:09f915e6f9f6 56 hadNull = true;
andrewboyson 0:09f915e6f9f6 57 return '\\';
andrewboyson 0:09f915e6f9f6 58 }
andrewboyson 0:09f915e6f9f6 59 }
andrewboyson 0:09f915e6f9f6 60 void LogEnable(int on)
andrewboyson 0:09f915e6f9f6 61 {
andrewboyson 0:09f915e6f9f6 62 enable = on;
andrewboyson 0:09f915e6f9f6 63 }
andrewboyson 2:06fa34661f19 64 int LogInit()
andrewboyson 0:09f915e6f9f6 65 {
andrewboyson 0:09f915e6f9f6 66 pPush = buffer;
andrewboyson 0:09f915e6f9f6 67 pPull = buffer;
andrewboyson 2:06fa34661f19 68 return 0;
andrewboyson 0:09f915e6f9f6 69 }
andrewboyson 0:09f915e6f9f6 70 void LogF(char *fmt, ...)
andrewboyson 0:09f915e6f9f6 71 {
andrewboyson 0:09f915e6f9f6 72 //Set up variable arguments
andrewboyson 0:09f915e6f9f6 73 va_list argptr;
andrewboyson 0:09f915e6f9f6 74 va_start(argptr, fmt);
andrewboyson 0:09f915e6f9f6 75
andrewboyson 0:09f915e6f9f6 76 //Find the size required
andrewboyson 4:e076884ef8bd 77 int size = vsnprintf(NULL, 0, fmt, argptr);
andrewboyson 0:09f915e6f9f6 78
andrewboyson 0:09f915e6f9f6 79 //Allocate enough memory for the size required with an extra byte for the terminating null
andrewboyson 4:e076884ef8bd 80 char snd[size + 1];
andrewboyson 0:09f915e6f9f6 81
andrewboyson 0:09f915e6f9f6 82 //Fill the new buffer
andrewboyson 4:e076884ef8bd 83 vsprintf(snd, fmt, argptr);
andrewboyson 0:09f915e6f9f6 84
andrewboyson 0:09f915e6f9f6 85 //Finish with variable arguments
andrewboyson 0:09f915e6f9f6 86 va_end(argptr);
andrewboyson 0:09f915e6f9f6 87
andrewboyson 0:09f915e6f9f6 88 //Send the string to the log buffer
andrewboyson 0:09f915e6f9f6 89 for (char* ptr = snd; *ptr; ptr++) LogPush(*ptr);
andrewboyson 0:09f915e6f9f6 90
andrewboyson 0:09f915e6f9f6 91 }
andrewboyson 4:e076884ef8bd 92 void LogTime()
andrewboyson 4:e076884ef8bd 93 {
andrewboyson 4:e076884ef8bd 94 uint32_t now = TimeGet();
andrewboyson 4:e076884ef8bd 95 int size = snprintf(NULL, 0, DATE_FORMAT, now);
andrewboyson 4:e076884ef8bd 96 char snd[size + 1];
andrewboyson 4:e076884ef8bd 97 sprintf(snd, DATE_FORMAT, now);
andrewboyson 4:e076884ef8bd 98 for (char* ptr = snd; *ptr; ptr++) LogPush(*ptr);
andrewboyson 4:e076884ef8bd 99 }
andrewboyson 0:09f915e6f9f6 100 void LogCrLf (char * text)
andrewboyson 0:09f915e6f9f6 101 {
andrewboyson 0:09f915e6f9f6 102 LogF("%s\r\n", text);
andrewboyson 0:09f915e6f9f6 103 }
andrewboyson 0:09f915e6f9f6 104 void LogSave()
andrewboyson 0:09f915e6f9f6 105 {
andrewboyson 0:09f915e6f9f6 106 FILE *fp = fopen(LOG_FILE, "w");
andrewboyson 0:09f915e6f9f6 107 LogEnumerateStart();
andrewboyson 0:09f915e6f9f6 108 while(1)
andrewboyson 0:09f915e6f9f6 109 {
andrewboyson 0:09f915e6f9f6 110 int c = LogEnumerate();
andrewboyson 0:09f915e6f9f6 111 if (c == EOF) break;
andrewboyson 0:09f915e6f9f6 112 putc(c, fp);
andrewboyson 0:09f915e6f9f6 113 }
andrewboyson 0:09f915e6f9f6 114 fclose(fp);
andrewboyson 0:09f915e6f9f6 115 }