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/*************************************************************************
* Freematics Data Logger Class
* Distributed under GPL v2.0
* Written by Stanley Huang <stanleyhuangyc@gmail.com>
* Visit http://freematics.com for more information
*************************************************************************/
#define FORMAT_BIN 0
#define FORMAT_TEXT 1
typedef struct {
uint32_t time;
uint16_t pid;
uint8_t flags;
uint8_t checksum;
float value[3];
} LOG_DATA_COMM;
#define PID_GPS_LATITUDE 0xA
#define PID_GPS_LONGITUDE 0xB
#define PID_GPS_ALTITUDE 0xC
#define PID_GPS_SPEED 0xD
#define PID_GPS_HEADING 0xE
#define PID_GPS_SAT_COUNT 0xF
#define PID_GPS_TIME 0x10
#define PID_GPS_DATE 0x11
#define PID_ACC 0x20
#define PID_GYRO 0x21
#define PID_COMPASS 0x22
#define PID_MEMS_TEMP 0x23
#define PID_BATTERY_VOLTAGE 0x24
#define PID_DATA_SIZE 0x80
#define FILE_NAME_FORMAT "DAT%05d.CSV"
#define FILE_PATH "/DATA/"
#if ENABLE_DATA_OUT
#if USE_SOFTSERIAL
SoftwareSerial SerialRF(A2, A3);
#elif defined(RF_SERIAL)
#define SerialRF RF_SERIAL
#else
#define SerialRF Serial
#endif
#endif
#if ENABLE_DATA_LOG
static File sdfile;
#endif
typedef struct {
uint8_t pid;
char name[3];
} PID_NAME;
const PID_NAME pidNames[] PROGMEM = {
{PID_ACC, {'A','C','C'}},
{PID_GYRO, {'G','Y','R'}},
{PID_COMPASS, {'M','A','G'}},
{PID_GPS_LATITUDE, {'L','A','T'}},
{PID_GPS_LONGITUDE, {'L','N','G'}},
{PID_GPS_ALTITUDE, {'A','L','T'}},
{PID_GPS_SPEED, {'S','P','D'}},
{PID_GPS_HEADING, {'C','R','S'}},
{PID_GPS_SAT_COUNT, {'S','A','T'}},
{PID_GPS_TIME, {'U','T','C'}},
{PID_GPS_DATE, {'D','T','E'}},
{PID_BATTERY_VOLTAGE, {'B','A','T'}},
{PID_DATA_SIZE, {'D','A','T'}},
};
class CDataLogger {
public:
CDataLogger()
{
m_lastDataTime = 0;
#if ENABLE_DATA_CACHE
cacheBytes = 0;
#endif
}
void initSender()
{
#if ENABLE_DATA_OUT
SerialRF.begin(STREAM_BAUDRATE);
#endif
}
byte genTimestamp(char* buf, bool absolute)
{
byte n;
if (absolute || dataTime >= m_lastDataTime + 60000) {
// absolute timestamp
n = sprintf(buf, "#%lu,", dataTime);
} else {
// incremental timestamp
n = sprintf(buf, "%u,", (unsigned int)(dataTime - m_lastDataTime));
}
return n;
}
void record(const char* buf, byte len)
{
#if ENABLE_DATA_LOG
#if STREAM_FORMAT == FORMAT_BIN
dataSize += sdfile.write(buf, len);
#else
char tmp[12];
byte n = genTimestamp(tmp, dataSize == 0);
dataSize += sdfile.write(tmp, n);
dataSize += sdfile.write(buf, len);
sdfile.println();
dataSize += 3;
#endif
#endif
m_lastDataTime = dataTime;
}
void dispatch(const char* buf, byte len)
{
#if ENABLE_DATA_CACHE
if (cacheBytes + len < MAX_CACHE_SIZE - 10) {
cacheBytes += genTimestamp(cache + cacheBytes, cacheBytes == 0);
memcpy(cache + cacheBytes, buf, len);
cacheBytes += len;
cache[cacheBytes++] = '\n';
cache[cacheBytes] = 0;
}
#endif
#if ENABLE_DATA_OUT
SerialRF.write(buf, len);
SerialRF.println();
#endif
}
void logData(const char* buf, byte len)
{
#if ENABLE_DATA_OUT
#if STREAM_FORMAT != FORMAT_BIN
dispatch(buf, len);
#endif
#endif
record(buf, len);
}
void logData(uint16_t pid)
{
char buf[8];
byte len = translatePIDName(pid, buf);
#if ENABLE_DATA_OUT
#if STREAM_FORMAT != FORMAT_BIN
dispatch(buf, len);
#endif
#endif
record(buf, len);
}
void logData(uint16_t pid, int16_t value)
{
char buf[16];
byte n = translatePIDName(pid, buf);
byte len = sprintf(buf + n, "%d", value) + n;
#if STREAM_FORMAT == FORMAT_BIN
LOG_DATA_COMM ld = {dataTime, pid, 1, 0, value};
ld.checksum = getChecksum((char*)&ld, 12);
dispatch((const char*)&ld, 12);
#else
dispatch(buf, len);
#endif
record(buf, len);
}
void logData(uint16_t pid, int32_t value)
{
char buf[20];
byte n = translatePIDName(pid, buf);
byte len = sprintf(buf + n, "%ld", value) + n;
#if ENABLE_DATA_OUT
#if STREAM_FORMAT == FORMAT_BIN
LOG_DATA_COMM ld = {dataTime, pid, 1, 0, value};
ld.checksum = getChecksum((char*)&ld, 12);
dispatch((const char*)&ld, 12);
#else
dispatch(buf, len);
#endif
#endif
record(buf, len);
}
void logData(uint16_t pid, uint32_t value)
{
char buf[20];
byte n = translatePIDName(pid, buf);
byte len = sprintf(buf + n, "%lu", value) + n;
#if STREAM_FORMAT == FORMAT_BIN
LOG_DATA_COMM ld = {dataTime, pid, 1, 0, value};
ld.checksum = getChecksum((char*)&ld, 12);
dispatch((const char*)&ld, 12);
#else
dispatch(buf, len);
#endif
record(buf, len);
}
void logData(uint16_t pid, int values[])
{
char buf[24];
byte n = translatePIDName(pid, buf);
byte len = sprintf(buf + n, "%d,%d,%d", values[0], values[1], values[2]) + n;
#if STREAM_FORMAT == FORMAT_BIN
LOG_DATA_COMM ld = {dataTime, pid, 3, 0, {values[0], values[1], values[2]}};
ld.checksum = getChecksum((char*)&ld, 20);
dispatch((const char*)&ld, 20);
#else
dispatch(buf, len);
#endif
record(buf, len);
}
#if ENABLE_DATA_LOG
uint16_t openFile(uint16_t logFlags = 0, uint32_t dateTime = 0)
{
uint16_t fileIndex;
char filename[24] = FILE_PATH;
dataSize = 0;
if (SD.exists(filename)) {
for (fileIndex = 1; fileIndex; fileIndex++) {
sprintf(filename + sizeof(FILE_PATH) - 1, FILE_NAME_FORMAT, fileIndex);
if (!SD.exists(filename)) {
break;
}
}
if (fileIndex == 0)
return 0;
} else {
SD.mkdir(filename);
fileIndex = 1;
sprintf(filename + sizeof(FILE_PATH) - 1, FILE_NAME_FORMAT, 1);
}
sdfile = SD.open(filename, FILE_WRITE);
if (!sdfile) {
return 0;
}
m_lastDataTime = dateTime;
return fileIndex;
}
void closeFile()
{
sdfile.close();
}
void flushFile()
{
sdfile.flush();
}
#endif
uint32_t dataTime;
uint32_t dataSize;
#if ENABLE_DATA_CACHE
char cache[MAX_CACHE_SIZE];
int cacheBytes;
#endif
private:
byte getChecksum(char* buffer, byte len)
{
uint8_t checksum = 0;
for (byte i = 0; i < len; i++) {
checksum ^= buffer[i];
}
return checksum;
}
byte translatePIDName(uint16_t pid, char* text)
{
#if STREAM_FORMAT == FORMAT_TEXT && USE_FRIENDLY_PID_NAME
for (uint16_t n = 0; n < sizeof(pidNames) / sizeof(pidNames[0]); n++) {
uint16_t id = pgm_read_byte(&pidNames[n].pid);
if (pid == id) {
memcpy_P(text, pidNames[n].name, 3);
text[3] = ',';
return 4;
}
}
#endif
return sprintf(text, "%X,", pid);
}
uint32_t m_lastDataTime;
};
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