Joseph Radford / Mbed 2 deprecated Seeed_Arch_GPRS_V2_Humidty_Alert Featured

A simple WIP that logs data from a Grove sensor, and can send and receive information over USB and SMS.

Dependencies:   DHT DS_1337 SDFileSystem USBDevice mbed

Handlers/SdHandler.cpp@0:2df78a4443cd, 2016-04-10 (annotated)

Committer:
Joseph Radford
Date:
Sun Apr 10 15:47:33 2016 +1000
Revision:
0:2df78a4443cd
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Joseph Radford 0:2df78a4443cd 1 #include "SdHandler.h"
Joseph Radford 0:2df78a4443cd 2
Joseph Radford 0:2df78a4443cd 3 #include "GroveDht22.h" // for interpreting the result struct
Joseph Radford 0:2df78a4443cd 4 #include "circbuff.h"
Joseph Radford 0:2df78a4443cd 5
Joseph Radford 0:2df78a4443cd 6 #define SD_BUFFER_LEN 256u // length of circular buffers
Joseph Radford 0:2df78a4443cd 7
Joseph Radford 0:2df78a4443cd 8 // define pins for communicating with SD card
Joseph Radford 0:2df78a4443cd 9 #define PIN_MOSI P1_22
Joseph Radford 0:2df78a4443cd 10 #define PIN_MISO P1_21
Joseph Radford 0:2df78a4443cd 11 #define PIN_SCK P1_20
Joseph Radford 0:2df78a4443cd 12 #define PIN_CS P1_23
Joseph Radford 0:2df78a4443cd 13
Joseph Radford 0:2df78a4443cd 14 #define DATA_FILE_NAME "/sd/data.csv"
Joseph Radford 0:2df78a4443cd 15 #define SYSLOG_FILE_NAME "/sd/log.txt"
Joseph Radford 0:2df78a4443cd 16
Joseph Radford 0:2df78a4443cd 17 // declare led that will be used to express state of SD card
Joseph Radford 0:2df78a4443cd 18 extern DigitalOut myled2;
Joseph Radford 0:2df78a4443cd 19
Joseph Radford 0:2df78a4443cd 20 SdHandler::SdHandler(MyTimers * _timer) : AbstractHandler(_timer)
Joseph Radford 0:2df78a4443cd 21 {
Joseph Radford 0:2df78a4443cd 22 // init file system and files
Joseph Radford 0:2df78a4443cd 23 m_sdfs = new SDFileSystem(PIN_MOSI, PIN_MISO, PIN_SCK, PIN_CS, "sd");
Joseph Radford 0:2df78a4443cd 24 m_data = NULL;
Joseph Radford 0:2df78a4443cd 25 m_syslog = NULL;
Joseph Radford 0:2df78a4443cd 26
Joseph Radford 0:2df78a4443cd 27 // initialise circular buffers
Joseph Radford 0:2df78a4443cd 28 m_dataLogBuff = new CircBuff(SD_BUFFER_LEN);
Joseph Radford 0:2df78a4443cd 29 m_sysLogBuff = new CircBuff(SD_BUFFER_LEN);
Joseph Radford 0:2df78a4443cd 30
Joseph Radford 0:2df78a4443cd 31 mode = sd_Start;
Joseph Radford 0:2df78a4443cd 32 m_lastRequest = sdreq_SdNone;
Joseph Radford 0:2df78a4443cd 33 }
Joseph Radford 0:2df78a4443cd 34
Joseph Radford 0:2df78a4443cd 35 SdHandler::~SdHandler()
Joseph Radford 0:2df78a4443cd 36 {
Joseph Radford 0:2df78a4443cd 37 delete m_dataLogBuff;
Joseph Radford 0:2df78a4443cd 38 delete m_sysLogBuff;
Joseph Radford 0:2df78a4443cd 39 }
Joseph Radford 0:2df78a4443cd 40
Joseph Radford 0:2df78a4443cd 41 void SdHandler::run()
Joseph Radford 0:2df78a4443cd 42 {
Joseph Radford 0:2df78a4443cd 43 uint16_t tempInt = 0, tempInt2 = 0;
Joseph Radford 0:2df78a4443cd 44
Joseph Radford 0:2df78a4443cd 45 unsigned char tempBuff[SD_BUFFER_LEN];
Joseph Radford 0:2df78a4443cd 46
Joseph Radford 0:2df78a4443cd 47 switch(mode)
Joseph Radford 0:2df78a4443cd 48 {
Joseph Radford 0:2df78a4443cd 49 case sd_Start: /* Set up the state machine */
Joseph Radford 0:2df78a4443cd 50 // check if card is inserted??
Joseph Radford 0:2df78a4443cd 51 //m_sdfs->unmount();
Joseph Radford 0:2df78a4443cd 52 // close both files if necessary
Joseph Radford 0:2df78a4443cd 53 if (m_data != NULL)
Joseph Radford 0:2df78a4443cd 54 fclose(m_data);
Joseph Radford 0:2df78a4443cd 55 if (m_syslog != NULL)
Joseph Radford 0:2df78a4443cd 56 fclose(m_syslog);
Joseph Radford 0:2df78a4443cd 57
Joseph Radford 0:2df78a4443cd 58 m_data = NULL;
Joseph Radford 0:2df78a4443cd 59 m_syslog = NULL;
Joseph Radford 0:2df78a4443cd 60
Joseph Radford 0:2df78a4443cd 61 //mkdir("/sd", 0777);
Joseph Radford 0:2df78a4443cd 62 //m_sdfs->mount();
Joseph Radford 0:2df78a4443cd 63 m_data = fopen(DATA_FILE_NAME, "a");
Joseph Radford 0:2df78a4443cd 64 m_syslog = fopen(SYSLOG_FILE_NAME, "a");
Joseph Radford 0:2df78a4443cd 65
Joseph Radford 0:2df78a4443cd 66 if ((m_data != NULL) && (m_syslog != NULL))
Joseph Radford 0:2df78a4443cd 67 {
Joseph Radford 0:2df78a4443cd 68 // both opened successfully
Joseph Radford 0:2df78a4443cd 69 fprintf(m_syslog, "Unit booted OK\n");
Joseph Radford 0:2df78a4443cd 70 fclose(m_syslog);
Joseph Radford 0:2df78a4443cd 71
Joseph Radford 0:2df78a4443cd 72 // write the header in on startup
Joseph Radford 0:2df78a4443cd 73 fprintf(m_data, "Timestamp, Temperature (degC), Humidity (pc), Dewpoint\n");
Joseph Radford 0:2df78a4443cd 74 fclose(m_data);
Joseph Radford 0:2df78a4443cd 75 mode = sd_CheckSysLogBuffer;
Joseph Radford 0:2df78a4443cd 76 }
Joseph Radford 0:2df78a4443cd 77 break;
Joseph Radford 0:2df78a4443cd 78
Joseph Radford 0:2df78a4443cd 79 case sd_CheckSysLogBuffer: /* See if any data should be written to the log file */
Joseph Radford 0:2df78a4443cd 80 if (m_sysLogBuff->dataAvailable())
Joseph Radford 0:2df78a4443cd 81 {
Joseph Radford 0:2df78a4443cd 82 tempInt = m_sysLogBuff->read(tempBuff, SD_BUFFER_LEN);
Joseph Radford 0:2df78a4443cd 83 tempInt2 = fprintf(m_syslog, (const char*)tempBuff);
Joseph Radford 0:2df78a4443cd 84 if (tempInt == tempInt2)
Joseph Radford 0:2df78a4443cd 85 {
Joseph Radford 0:2df78a4443cd 86 // success
Joseph Radford 0:2df78a4443cd 87 mode = sd_CheckDataLogBuffer;
Joseph Radford 0:2df78a4443cd 88 }
Joseph Radford 0:2df78a4443cd 89 else
Joseph Radford 0:2df78a4443cd 90 {
Joseph Radford 0:2df78a4443cd 91 // something went wrong
Joseph Radford 0:2df78a4443cd 92 m_timer->SetTimer(MyTimers::tmr_SdWaitError, 2000);
Joseph Radford 0:2df78a4443cd 93 mode = sd_WaitError;
Joseph Radford 0:2df78a4443cd 94 }
Joseph Radford 0:2df78a4443cd 95 }
Joseph Radford 0:2df78a4443cd 96 else {
Joseph Radford 0:2df78a4443cd 97 mode = sd_CheckDataLogBuffer;
Joseph Radford 0:2df78a4443cd 98 }
Joseph Radford 0:2df78a4443cd 99 break;
Joseph Radford 0:2df78a4443cd 100
Joseph Radford 0:2df78a4443cd 101 case sd_CheckDataLogBuffer: /* See if any data should be written to the data file */
Joseph Radford 0:2df78a4443cd 102 if (m_dataLogBuff->dataAvailable())
Joseph Radford 0:2df78a4443cd 103 {
Joseph Radford 0:2df78a4443cd 104 m_data = fopen(DATA_FILE_NAME, "a");
Joseph Radford 0:2df78a4443cd 105
Joseph Radford 0:2df78a4443cd 106 if (m_data != NULL)
Joseph Radford 0:2df78a4443cd 107 {
Joseph Radford 0:2df78a4443cd 108 // opened successfully
Joseph Radford 0:2df78a4443cd 109 tempInt = m_dataLogBuff->read(tempBuff, SD_BUFFER_LEN);
Joseph Radford 0:2df78a4443cd 110 tempInt2 = fprintf(m_data, (const char*)tempBuff);
Joseph Radford 0:2df78a4443cd 111 fclose(m_data);
Joseph Radford 0:2df78a4443cd 112 if (tempInt == tempInt2)
Joseph Radford 0:2df78a4443cd 113 {
Joseph Radford 0:2df78a4443cd 114 // success
Joseph Radford 0:2df78a4443cd 115 myled2 = 0;
Joseph Radford 0:2df78a4443cd 116 mode = sd_CheckSysLogBuffer;
Joseph Radford 0:2df78a4443cd 117 }
Joseph Radford 0:2df78a4443cd 118 else
Joseph Radford 0:2df78a4443cd 119 {
Joseph Radford 0:2df78a4443cd 120 // something went wrong
Joseph Radford 0:2df78a4443cd 121 m_timer->SetTimer(MyTimers::tmr_SdWaitError, 2000);
Joseph Radford 0:2df78a4443cd 122 mode = sd_WaitError;
Joseph Radford 0:2df78a4443cd 123 }
Joseph Radford 0:2df78a4443cd 124 }
Joseph Radford 0:2df78a4443cd 125 else
Joseph Radford 0:2df78a4443cd 126 {
Joseph Radford 0:2df78a4443cd 127 // something went wrong
Joseph Radford 0:2df78a4443cd 128 m_timer->SetTimer(MyTimers::tmr_SdWaitError, 2000);
Joseph Radford 0:2df78a4443cd 129 mode = sd_WaitError;
Joseph Radford 0:2df78a4443cd 130 }
Joseph Radford 0:2df78a4443cd 131 }
Joseph Radford 0:2df78a4443cd 132 else {
Joseph Radford 0:2df78a4443cd 133 mode = sd_CheckSysLogBuffer;
Joseph Radford 0:2df78a4443cd 134 }
Joseph Radford 0:2df78a4443cd 135 break;
Joseph Radford 0:2df78a4443cd 136
Joseph Radford 0:2df78a4443cd 137 case sd_WaitError: /* Many fails, much wow, wait for a while */
Joseph Radford 0:2df78a4443cd 138 if (!m_timer->GetTimer(MyTimers::tmr_SdWaitError))
Joseph Radford 0:2df78a4443cd 139 {
Joseph Radford 0:2df78a4443cd 140 // timer has elapsed. go back to start.
Joseph Radford 0:2df78a4443cd 141 mode = sd_Start;
Joseph Radford 0:2df78a4443cd 142 }
Joseph Radford 0:2df78a4443cd 143 break;
Joseph Radford 0:2df78a4443cd 144 }
Joseph Radford 0:2df78a4443cd 145 }
Joseph Radford 0:2df78a4443cd 146
Joseph Radford 0:2df78a4443cd 147 void SdHandler::setRequest(int request, void *data)
Joseph Radford 0:2df78a4443cd 148 {
Joseph Radford 0:2df78a4443cd 149 request_t req = (request_t)request;
Joseph Radford 0:2df78a4443cd 150 m_lastRequest = req;
Joseph Radford 0:2df78a4443cd 151 switch(req) {
Joseph Radford 0:2df78a4443cd 152 case sdreq_SdNone:
Joseph Radford 0:2df78a4443cd 153
Joseph Radford 0:2df78a4443cd 154 break;
Joseph Radford 0:2df78a4443cd 155 case sdreq_LogData:
Joseph Radford 0:2df78a4443cd 156
Joseph Radford 0:2df78a4443cd 157 myled2 = 1;
Joseph Radford 0:2df78a4443cd 158 // have received the data struct. cast it
Joseph Radford 0:2df78a4443cd 159 Dht22Result *result = (Dht22Result*)data;
Joseph Radford 0:2df78a4443cd 160
Joseph Radford 0:2df78a4443cd 161 // write things to sd card buffer
Joseph Radford 0:2df78a4443cd 162 char s[50]; // buffer
Joseph Radford 0:2df78a4443cd 163 int temp; // length of buffer
Joseph Radford 0:2df78a4443cd 164 csvStart(result->resultTime);
Joseph Radford 0:2df78a4443cd 165 temp = sprintf(s, "%4.2f", result->lastCelcius);
Joseph Radford 0:2df78a4443cd 166 csvData(s, temp);
Joseph Radford 0:2df78a4443cd 167 temp = sprintf(s, "%4.2f", result->lastHumidity);
Joseph Radford 0:2df78a4443cd 168 csvData(s, temp);
Joseph Radford 0:2df78a4443cd 169 temp = sprintf(s, "%4.2f", result->lastDewpoint);
Joseph Radford 0:2df78a4443cd 170 csvData(s, temp);
Joseph Radford 0:2df78a4443cd 171 csvEnd();
Joseph Radford 0:2df78a4443cd 172 break;
Joseph Radford 0:2df78a4443cd 173 case sdreq_LogSystem:
Joseph Radford 0:2df78a4443cd 174 char *str = (char*)data;
Joseph Radford 0:2df78a4443cd 175 logEvent(str);
Joseph Radford 0:2df78a4443cd 176 break;
Joseph Radford 0:2df78a4443cd 177 }
Joseph Radford 0:2df78a4443cd 178 }
Joseph Radford 0:2df78a4443cd 179
Joseph Radford 0:2df78a4443cd 180 void SdHandler::csvStart(time_t _time)
Joseph Radford 0:2df78a4443cd 181 {
Joseph Radford 0:2df78a4443cd 182 unsigned char sTemp[17];
Joseph Radford 0:2df78a4443cd 183
Joseph Radford 0:2df78a4443cd 184
Joseph Radford 0:2df78a4443cd 185 // extract time_t to time info struct
Joseph Radford 0:2df78a4443cd 186
Joseph Radford 0:2df78a4443cd 187 struct tm * timeinfo = localtime(&_time);
Joseph Radford 0:2df78a4443cd 188
Joseph Radford 0:2df78a4443cd 189 // print the formatted timestamp at the start of terminalBuffer, with comma
Joseph Radford 0:2df78a4443cd 190 sprintf((char*)&sTemp[0], "%04d%02d%02d %02d%02d%02d,", (timeinfo->tm_year + 1900),
Joseph Radford 0:2df78a4443cd 191 (timeinfo->tm_mon + 1),
Joseph Radford 0:2df78a4443cd 192 timeinfo->tm_mday,
Joseph Radford 0:2df78a4443cd 193 timeinfo->tm_hour,
Joseph Radford 0:2df78a4443cd 194 timeinfo->tm_min,
Joseph Radford 0:2df78a4443cd 195 timeinfo->tm_sec);
Joseph Radford 0:2df78a4443cd 196
Joseph Radford 0:2df78a4443cd 197 sTemp[16] = 0;
Joseph Radford 0:2df78a4443cd 198
Joseph Radford 0:2df78a4443cd 199 m_dataLogBuff->add(sTemp);
Joseph Radford 0:2df78a4443cd 200 }
Joseph Radford 0:2df78a4443cd 201
Joseph Radford 0:2df78a4443cd 202 void SdHandler::csvData(const char * s, int len)
Joseph Radford 0:2df78a4443cd 203 {
Joseph Radford 0:2df78a4443cd 204 unsigned char sTemp[50];
Joseph Radford 0:2df78a4443cd 205 int idx = 0;
Joseph Radford 0:2df78a4443cd 206 // add a column to the buffer
Joseph Radford 0:2df78a4443cd 207 sprintf((char*)&sTemp[idx], s);
Joseph Radford 0:2df78a4443cd 208 idx += len;
Joseph Radford 0:2df78a4443cd 209 sTemp[idx++] = ',';
Joseph Radford 0:2df78a4443cd 210 sTemp[idx] = 0;
Joseph Radford 0:2df78a4443cd 211 m_dataLogBuff->add(sTemp);
Joseph Radford 0:2df78a4443cd 212 }
Joseph Radford 0:2df78a4443cd 213
Joseph Radford 0:2df78a4443cd 214 void SdHandler::csvEnd()
Joseph Radford 0:2df78a4443cd 215 {
Joseph Radford 0:2df78a4443cd 216 unsigned char sTemp[2];
Joseph Radford 0:2df78a4443cd 217 sTemp[0] = '\n';
Joseph Radford 0:2df78a4443cd 218 sTemp[1] = 0;
Joseph Radford 0:2df78a4443cd 219 m_dataLogBuff->add(sTemp);
Joseph Radford 0:2df78a4443cd 220 }
Joseph Radford 0:2df78a4443cd 221
Joseph Radford 0:2df78a4443cd 222 void SdHandler::logEvent(const char * s)
Joseph Radford 0:2df78a4443cd 223 {
Joseph Radford 0:2df78a4443cd 224 }