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author | Stanley Huang <stanleyhuangyc@gmail.com> | 2014-01-08 22:28:27 +1100 |
---|---|---|
committer | Stanley Huang <stanleyhuangyc@gmail.com> | 2014-01-08 22:28:27 +1100 |
commit | 8f3ea96c48025f78e0f0447a38cced71587802e1 (patch) | |
tree | cbf0a3c7382c1f1cf3cf7b454d70c8536f3d82bb | |
parent | 876105a52a99b342f31a9319b9da7e7b3f123560 (diff) | |
download | 2021-arduino-obd-8f3ea96c48025f78e0f0447a38cced71587802e1.tar.gz 2021-arduino-obd-8f3ea96c48025f78e0f0447a38cced71587802e1.tar.bz2 2021-arduino-obd-8f3ea96c48025f78e0f0447a38cced71587802e1.zip |
Update OBD library
-rw-r--r-- | libraries/OBD/OBD.cpp | 883 | ||||
-rw-r--r-- | libraries/OBD/OBD.h | 298 |
2 files changed, 611 insertions, 570 deletions
diff --git a/libraries/OBD/OBD.cpp b/libraries/OBD/OBD.cpp index c357da1..5f5d93a 100644 --- a/libraries/OBD/OBD.cpp +++ b/libraries/OBD/OBD.cpp @@ -1,431 +1,452 @@ -/************************************************************************* -* Arduino Library for OBD-II UART Adapter -* Distributed under GPL v2.0 -* Copyright (c) 2012~2013 Stanley Huang <stanleyhuangyc@gmail.com> -* All rights reserved. -*************************************************************************/ - -#include <Arduino.h> -#include <avr/pgmspace.h> -#include "OBD.h" - -//#define DEBUG Serial -//#define REDIRECT Serial - -#define MAX_CMD_LEN 6 - -const char PROGMEM s_initcmd[][MAX_CMD_LEN] = {"ATZ\r","ATE0\r","ATL1\r","0902\r"}; -const char PROGMEM s_cmd_fmt[] = "%02X%02X 1\r"; -const char PROGMEM s_cmd_sleep[] = "atlp\r"; -#define STR_SEARCHING "SEARCHING..." - -unsigned int hex2uint16(const char *p) -{ - char c = *p; - unsigned int i = 0; - for (char n = 0; c && n < 4; c = *(++p)) { - if (c >= 'A' && c <= 'F') { - c -= 7; - } else if (c>='a' && c<='f') { - c -= 39; - } else if (c == ' ') { - continue; - } else if (c < '0' || c > '9') { - break; - } - i = (i << 4) | (c & 0xF); - n++; - } - return i; -} - -unsigned char hex2uint8(const char *p) -{ - unsigned char c1 = *p; - unsigned char c2 = *(p + 1); - if (c1 >= 'A' && c1 <= 'F') - c1 -= 7; - else if (c1 >='a' && c1 <= 'f') - c1 -= 39; - else if (c1 < '0' || c1 > '9') - return 0; - - if (c2 >= 'A' && c2 <= 'F') - c2 -= 7; - else if (c2 >= 'a' && c2 <= 'f') - c2 -= 39; - else if (c2 < '0' || c2 > '9') - return 0; - - return c1 << 4 | (c2 & 0xf); -} - -/************************************************************************* -* OBD-II UART Adapter -*************************************************************************/ -#include <Wire.h> - -void COBD::sendQuery(unsigned char pid) -{ - char cmd[8]; - sprintf_P(cmd, s_cmd_fmt, dataMode, pid); -#ifdef DEBUG - debugOutput(cmd); -#endif - write(cmd); -} - -bool COBD::read(byte pid, int& result, bool passive) -{ - // send a query command - sendQuery(pid); - // wait for reponse - bool hasData; - unsigned long tick = millis(); - do { - dataIdleLoop(); - } while (!(hasData = available()) && millis() - tick < OBD_TIMEOUT_SHORT); - if (!hasData) { - errors++; - return false; - } - // receive and parse the response - return getResponseParsed(pid, result); -} - -bool COBD::available() -{ - return OBDUART.available(); -} - -char COBD::read() -{ - char c = OBDUART.read(); -#ifdef REDIRECT - REDIRECT.write(c); -#endif - return c; -} - -void COBD::write(char* s) -{ - OBDUART.write(s); -} - -void COBD::write(char c) -{ - OBDUART.write(c); -} - -int COBD::normalizeData(byte pid, char* data) -{ - int result; - switch (pid) { - case PID_RPM: - result = getLargeValue(data) >> 2; - break; - case PID_FUEL_PRESSURE: - result = getSmallValue(data) * 3; - break; - case PID_COOLANT_TEMP: - case PID_INTAKE_TEMP: - case PID_AMBIENT_TEMP: - case PID_ENGINE_OIL_TEMP: - result = getTemperatureValue(data); - break; - case PID_ABSOLUTE_ENGINE_LOAD: - case PID_ETHANOL_PERCENTAGE: - case PID_HYBRID_BATTERY_PERCENTAGE: - result = getLargeValue(data) * 100 / 255; // % - break; - case PID_MAF_FLOW: - result = getLargeValue(data) / 100; - break; - case PID_THROTTLE: - case PID_ENGINE_LOAD: - case PID_FUEL_LEVEL: - result = getPercentageValue(data); - break; - case PID_TIMING_ADVANCE: - result = (getSmallValue(data) - 128) >> 1; - break; - case PID_DISTANCE: // km - case PID_RUNTIME: // second - case PID_FUEL_RAIL_PRESSURE: // kPa - case PID_ENGINE_REF_TORQUE: // Nm - result = getLargeValue(data); - break; - case PID_CONTROL_MODULE_VOLTAGE: // V - result = getLargeValue(data) / 1000; - break; - case PID_ENGINE_FUEL_RATE: // L/min - result = getLargeValue(data) * 3; - break; - case PID_ENGINE_TORQUE_PERCENTAGE: // % - result = (int)getSmallValue(data) - 125; - break; - default: - result = getSmallValue(data); - } - return result; -} - -char* COBD::getResponse(byte& pid, char* buffer) -{ - byte n = receive(buffer); - if (n > 6) { - char *p = buffer; - while ((p = strstr(p, "41 "))) { - p += 3; - byte curpid = hex2uint8(p); - if (pid == 0) pid = curpid; - if (curpid == pid) { - errors = 0; - p += 2; - if (*p == ' ') - return p + 1; - } - }; - } - return 0; -} - -bool COBD::getResponseParsed(byte& pid, int& result) -{ - char buffer[OBD_RECV_BUF_SIZE]; - char* data = getResponse(pid, buffer); - if (!data) { - // try recover next time - //write('\r'); - return false; - } - result = normalizeData(pid, data); - return true; -} - -void COBD::sleep(int seconds) -{ - char cmd[MAX_CMD_LEN]; - strcpy_P(cmd, s_cmd_sleep); - write(cmd); - if (seconds) { - delay((unsigned long)seconds << 10); - write('\r'); - } -} - -bool COBD::isValidPID(byte pid) -{ - if (pid >= 0x7f) - return false; - pid--; - byte i = pid >> 3; - byte b = 0x80 >> (pid & 0x7); - return pidmap[i] & b; -} - -void COBD::begin() -{ - OBDUART.begin(OBD_SERIAL_BAUDRATE); -} - -byte COBD::receive(char* buffer) -{ - unsigned long startTime = millis(); - unsigned char n = 0; - int timeout = OBD_TIMEOUT_SHORT; - bool prompted = false; - - buffer[0] = 0; - for (;;) { - if (available()) { - char c = read(); - if (n > 2 && c == '>') { - // prompt char received - prompted = true; - } else if (n < OBD_RECV_BUF_SIZE - 1) { - buffer[n++] = c; - buffer[n] = 0; - if (strstr(buffer, STR_SEARCHING)) { - strcpy(buffer, buffer + sizeof(STR_SEARCHING)); - n -= sizeof(STR_SEARCHING); - timeout = OBD_TIMEOUT_LONG; - } - } - } else if (prompted) { - break; - } else { - if (millis() - startTime > timeout) { - // timeout - return 0; - } - dataIdleLoop(); - } - } - - return n; -} - -bool COBD::init(bool passive) -{ - unsigned long currentMillis; - char buffer[OBD_RECV_BUF_SIZE]; - - m_state = OBD_CONNECTING; - - write('\r'); - delay(100); - while (available()) read(); - - for (unsigned char i = 0; i < sizeof(s_initcmd) / sizeof(s_initcmd[0]); i++) { - if (!passive) { - char cmd[MAX_CMD_LEN]; - strcpy_P(cmd, s_initcmd[i]); -#ifdef DEBUG - debugOutput(cmd); -#endif - write(cmd); - } - if (receive(buffer) == 0) { - return false; - } - } - while (available()) read(); - - // load pid map - memset(pidmap, 0, sizeof(pidmap)); - for (byte i = 0; i < 4; i++) { - byte pid = i * 0x20; - sendQuery(pid); - char* data = getResponse(pid, buffer); - if (!data) break; - data--; - for (byte n = 0; n < 4; n++) { - if (data[n * 3] != ' ') - break; - pidmap[i * 4 + n] = hex2uint8(data + n * 3 + 1); - } - } - while (available()) read(); - - m_state = OBD_CONNECTED; - errors = 0; - return true; -} - -#ifdef DEBUG -void COBD::debugOutput(const char *s) -{ - DEBUG.print('['); - DEBUG.print(millis()); - DEBUG.print(']'); - DEBUG.print(s); -} -#endif - -/************************************************************************* -* OBD-II I2C Adapter -*************************************************************************/ - -void COBDI2C::begin(byte addr) -{ - m_addr = addr; - Wire.begin(); -} - -bool COBDI2C::init() -{ - m_state = OBD_CONNECTING; - sendCommand(CMD_QUERY_STATUS); - - char recvbuf[MAX_PAYLOAD_SIZE]; - for (byte n = 0; n < 3; n++) { - memset(recvbuf, 0, sizeof(recvbuf)); - receive(recvbuf); - if (!memcmp(recvbuf, "OBD ", 4)) - break; - } - if (recvbuf[4] == 'Y') { - memcpy(pidmap, recvbuf + 16, sizeof(pidmap)); - m_state = OBD_CONNECTED; - return true; - } else { - m_state = OBD_DISCONNECTED; - return false; - } -} - -bool COBDI2C::read(byte pid, int& result, bool passive) -{ - uint32_t t = millis(); - sendQuery(pid); - dataIdleLoop(); - return getResponseParsed(pid, result); -} - -void COBDI2C::write(char* s) -{ - COMMAND_BLOCK cmdblock = {millis(), CMD_SEND_COMMAND}; - Wire.beginTransmission(m_addr); - Wire.write((byte*)&cmdblock, sizeof(cmdblock)); - Wire.write(s); - Wire.endTransmission(); -} - -bool COBDI2C::sendCommand(byte cmd, uint8_t data, byte* payload, byte payloadBytes) -{ - COMMAND_BLOCK cmdblock = {millis(), cmd, data}; - Wire.beginTransmission(m_addr); - bool success = Wire.write((byte*)&cmdblock, sizeof(COMMAND_BLOCK)) == sizeof(COMMAND_BLOCK); - if (payload) Wire.write(payload, payloadBytes); - Wire.endTransmission(); - return success; -} - -byte COBDI2C::receive(char* buffer) -{ - uint32_t start = millis(); - byte offset = 0; - do { - Wire.requestFrom((byte)m_addr, (byte)MAX_PAYLOAD_SIZE, (byte)1); - - bool hasEnd = false; - for (byte i = 0; i < MAX_PAYLOAD_SIZE; i++) { - if ((buffer[offset + i] = Wire.read()) == 0) - hasEnd = true; - } - - if (buffer[0] == 0) { - // data not ready - dataIdleLoop(); - continue; - } - - offset += MAX_PAYLOAD_SIZE; - if (!hasEnd) { - continue; - } - - return offset; - } while(millis() - start < OBD_TIMEOUT_LONG); - return 0; -} - -bool COBDI2C::btInit(uint16_t baudrate) -{ - return sendCommand(CMD_UART_BEGIN, baudrate / 1200); -} - -bool COBDI2C::btSend(byte* data, byte length) -{ - return sendCommand(CMD_UART_SEND, 0, data, length); -} - -bool COBDI2C::btReceive(byte* buffer, byte bufsize) -{ - if (!sendCommand(CMD_UART_RECV, bufsize)) return false; - memset(buffer, 0, MAX_PAYLOAD_SIZE); - Wire.requestFrom((byte)m_addr, (byte)MAX_PAYLOAD_SIZE, (byte)1); - Wire.readBytes((char*)buffer, MAX_PAYLOAD_SIZE); - return true; -} +/*************************************************************************
+* Arduino Library for OBD-II UART/I2C Adapter
+* Distributed under GPL v2.0
+* Visit http://arduinodev.com for more information
+* (C)2012-2014 Stanley Huang <stanleyhuangyc@gmail.com>
+*************************************************************************/
+
+#include <Arduino.h>
+#include <avr/pgmspace.h>
+#include "OBD.h"
+
+//#define DEBUG Serial
+//#define REDIRECT Serial
+
+#define MAX_CMD_LEN 6
+
+const char PROGMEM s_initcmd[][MAX_CMD_LEN] = {"ATZ\r","ATE0\r","ATL1\r","0902\r"};
+const char PROGMEM s_cmd_fmt[] = "%02X%02X 1\r";
+const char PROGMEM s_cmd_sleep[] = "atlp\r";
+#define STR_SEARCHING "SEARCHING..."
+
+unsigned int hex2uint16(const char *p)
+{
+ char c = *p;
+ unsigned int i = 0;
+ for (char n = 0; c && n < 4; c = *(++p)) {
+ if (c >= 'A' && c <= 'F') {
+ c -= 7;
+ } else if (c>='a' && c<='f') {
+ c -= 39;
+ } else if (c == ' ') {
+ continue;
+ } else if (c < '0' || c > '9') {
+ break;
+ }
+ i = (i << 4) | (c & 0xF);
+ n++;
+ }
+ return i;
+}
+
+unsigned char hex2uint8(const char *p)
+{
+ unsigned char c1 = *p;
+ unsigned char c2 = *(p + 1);
+ if (c1 >= 'A' && c1 <= 'F')
+ c1 -= 7;
+ else if (c1 >='a' && c1 <= 'f')
+ c1 -= 39;
+ else if (c1 < '0' || c1 > '9')
+ return 0;
+
+ if (c2 >= 'A' && c2 <= 'F')
+ c2 -= 7;
+ else if (c2 >= 'a' && c2 <= 'f')
+ c2 -= 39;
+ else if (c2 < '0' || c2 > '9')
+ return 0;
+
+ return c1 << 4 | (c2 & 0xf);
+}
+
+/*************************************************************************
+* OBD-II UART Adapter
+*************************************************************************/
+#include <Wire.h>
+
+void COBD::sendQuery(unsigned char pid)
+{
+ char cmd[8];
+ sprintf_P(cmd, s_cmd_fmt, dataMode, pid);
+#ifdef DEBUG
+ debugOutput(cmd);
+#endif
+ write(cmd);
+}
+
+bool COBD::read(byte pid, int& result, bool passive)
+{
+ // send a query command
+ sendQuery(pid);
+ // wait for reponse
+ bool hasData;
+ unsigned long tick = millis();
+ do {
+ dataIdleLoop();
+ } while (!(hasData = available()) && millis() - tick < OBD_TIMEOUT_SHORT);
+ if (!hasData) {
+ errors++;
+ return false;
+ }
+ // receive and parse the response
+ return getResponseParsed(pid, result);
+}
+
+bool COBD::available()
+{
+ return OBDUART.available();
+}
+
+char COBD::read()
+{
+ char c = OBDUART.read();
+#ifdef REDIRECT
+ REDIRECT.write(c);
+#endif
+ return c;
+}
+
+void COBD::write(char* s)
+{
+ OBDUART.write(s);
+}
+
+void COBD::write(char c)
+{
+ OBDUART.write(c);
+}
+
+int COBD::normalizeData(byte pid, char* data)
+{
+ int result;
+ switch (pid) {
+ case PID_RPM:
+ result = getLargeValue(data) >> 2;
+ break;
+ case PID_FUEL_PRESSURE:
+ result = getSmallValue(data) * 3;
+ break;
+ case PID_COOLANT_TEMP:
+ case PID_INTAKE_TEMP:
+ case PID_AMBIENT_TEMP:
+ case PID_ENGINE_OIL_TEMP:
+ result = getTemperatureValue(data);
+ break;
+ case PID_ABSOLUTE_ENGINE_LOAD:
+ case PID_ETHANOL_PERCENTAGE:
+ case PID_HYBRID_BATTERY_PERCENTAGE:
+ result = getLargeValue(data) * 100 / 255; // %
+ break;
+ case PID_MAF_FLOW:
+ result = getLargeValue(data) / 100;
+ break;
+ case PID_THROTTLE:
+ case PID_ENGINE_LOAD:
+ case PID_FUEL_LEVEL:
+ result = getPercentageValue(data);
+ break;
+ case PID_TIMING_ADVANCE:
+ result = (getSmallValue(data) - 128) >> 1;
+ break;
+ case PID_DISTANCE: // km
+ case PID_RUNTIME: // second
+ case PID_FUEL_RAIL_PRESSURE: // kPa
+ case PID_ENGINE_REF_TORQUE: // Nm
+ result = getLargeValue(data);
+ break;
+ case PID_CONTROL_MODULE_VOLTAGE: // V
+ result = getLargeValue(data) / 1000;
+ break;
+ case PID_ENGINE_FUEL_RATE: // L/min
+ result = getLargeValue(data) * 3;
+ break;
+ case PID_ENGINE_TORQUE_PERCENTAGE: // %
+ result = (int)getSmallValue(data) - 125;
+ break;
+ default:
+ result = getSmallValue(data);
+ }
+ return result;
+}
+
+char* COBD::getResponse(byte& pid, char* buffer)
+{
+ byte n = receive(buffer);
+ if (n > 6) {
+ char *p = buffer;
+ while ((p = strstr(p, "41 "))) {
+ p += 3;
+ byte curpid = hex2uint8(p);
+ if (pid == 0) pid = curpid;
+ if (curpid == pid) {
+ errors = 0;
+ p += 2;
+ if (*p == ' ')
+ return p + 1;
+ }
+ };
+ }
+ return 0;
+}
+
+bool COBD::getResponseParsed(byte& pid, int& result)
+{
+ char buffer[OBD_RECV_BUF_SIZE];
+ char* data = getResponse(pid, buffer);
+ if (!data) {
+ // try recover next time
+ //write('\r');
+ return false;
+ }
+ result = normalizeData(pid, data);
+ return true;
+}
+
+void COBD::sleep(int seconds)
+{
+ char cmd[MAX_CMD_LEN];
+ strcpy_P(cmd, s_cmd_sleep);
+ write(cmd);
+ if (seconds) {
+ delay((unsigned long)seconds << 10);
+ write('\r');
+ }
+}
+
+bool COBD::isValidPID(byte pid)
+{
+ if (pid >= 0x7f)
+ return false;
+ pid--;
+ byte i = pid >> 3;
+ byte b = 0x80 >> (pid & 0x7);
+ return pidmap[i] & b;
+}
+
+void COBD::begin()
+{
+ OBDUART.begin(OBD_SERIAL_BAUDRATE);
+}
+
+byte COBD::receive(char* buffer)
+{
+ unsigned long startTime = millis();
+ unsigned char n = 0;
+ int timeout = OBD_TIMEOUT_SHORT;
+ bool prompted = false;
+
+ buffer[0] = 0;
+ for (;;) {
+ if (available()) {
+ char c = read();
+ if (n > 2 && c == '>') {
+ // prompt char received
+ prompted = true;
+ } else if (n < OBD_RECV_BUF_SIZE - 1) {
+ buffer[n++] = c;
+ buffer[n] = 0;
+ if (strstr(buffer, STR_SEARCHING)) {
+ strcpy(buffer, buffer + sizeof(STR_SEARCHING));
+ n -= sizeof(STR_SEARCHING);
+ timeout = OBD_TIMEOUT_LONG;
+ }
+ }
+ } else if (prompted) {
+ break;
+ } else {
+ if (millis() - startTime > timeout) {
+ // timeout
+ return 0;
+ }
+ dataIdleLoop();
+ }
+ }
+
+ return n;
+}
+
+bool COBD::init(bool passive)
+{
+ unsigned long currentMillis;
+ char buffer[OBD_RECV_BUF_SIZE];
+
+ m_state = OBD_CONNECTING;
+
+ write('\r');
+ delay(100);
+ while (available()) read();
+
+ for (unsigned char i = 0; i < sizeof(s_initcmd) / sizeof(s_initcmd[0]); i++) {
+ if (!passive) {
+ char cmd[MAX_CMD_LEN];
+ strcpy_P(cmd, s_initcmd[i]);
+#ifdef DEBUG
+ debugOutput(cmd);
+#endif
+ write(cmd);
+ }
+ if (receive(buffer) == 0) {
+ return false;
+ }
+ }
+ while (available()) read();
+
+ // load pid map
+ memset(pidmap, 0, sizeof(pidmap));
+ for (byte i = 0; i < 4; i++) {
+ byte pid = i * 0x20;
+ sendQuery(pid);
+ char* data = getResponse(pid, buffer);
+ if (!data) break;
+ data--;
+ for (byte n = 0; n < 4; n++) {
+ if (data[n * 3] != ' ')
+ break;
+ pidmap[i * 4 + n] = hex2uint8(data + n * 3 + 1);
+ }
+ }
+ while (available()) read();
+
+ m_state = OBD_CONNECTED;
+ errors = 0;
+ return true;
+}
+
+#ifdef DEBUG
+void COBD::debugOutput(const char *s)
+{
+ DEBUG.print('[');
+ DEBUG.print(millis());
+ DEBUG.print(']');
+ DEBUG.print(s);
+}
+#endif
+
+/*************************************************************************
+* OBD-II I2C Adapter
+*************************************************************************/
+
+void COBDI2C::begin(byte addr)
+{
+ m_addr = addr;
+ Wire.begin();
+}
+
+bool COBDI2C::init()
+{
+ m_state = OBD_CONNECTING;
+ sendCommand(CMD_QUERY_STATUS);
+
+ char recvbuf[MAX_PAYLOAD_SIZE];
+ for (byte n = 0; n < 3; n++) {
+ memset(recvbuf, 0, sizeof(recvbuf));
+ receive(recvbuf);
+ if (!memcmp(recvbuf, "OBD ", 4))
+ break;
+ }
+ if (recvbuf[4] == 'Y') {
+ memcpy(pidmap, recvbuf + 16, sizeof(pidmap));
+ m_state = OBD_CONNECTED;
+ return true;
+ } else {
+ m_state = OBD_DISCONNECTED;
+ return false;
+ }
+}
+
+bool COBDI2C::read(byte pid, int& result, bool passive)
+{
+ uint32_t t = millis();
+ sendQuery(pid);
+ dataIdleLoop();
+ return getResponseParsed(pid, result);
+}
+
+void COBDI2C::write(char* s)
+{
+ COMMAND_BLOCK cmdblock = {millis(), CMD_SEND_COMMAND};
+ Wire.beginTransmission(m_addr);
+ Wire.write((byte*)&cmdblock, sizeof(cmdblock));
+ Wire.write(s);
+ Wire.endTransmission();
+}
+
+bool COBDI2C::sendCommand(byte cmd, uint8_t data, byte* payload, byte payloadBytes)
+{
+ COMMAND_BLOCK cmdblock = {millis(), cmd, data};
+ Wire.beginTransmission(m_addr);
+ bool success = Wire.write((byte*)&cmdblock, sizeof(COMMAND_BLOCK)) == sizeof(COMMAND_BLOCK);
+ if (payload) Wire.write(payload, payloadBytes);
+ Wire.endTransmission();
+ return success;
+}
+
+byte COBDI2C::receive(char* buffer)
+{
+ uint32_t start = millis();
+ byte offset = 0;
+ do {
+ Wire.requestFrom((byte)m_addr, (byte)MAX_PAYLOAD_SIZE, (byte)1);
+
+ bool hasEnd = false;
+ for (byte i = 0; i < MAX_PAYLOAD_SIZE; i++) {
+ if ((buffer[offset + i] = Wire.read()) == 0)
+ hasEnd = true;
+ }
+
+ if (buffer[0] == 0) {
+ // data not ready
+ dataIdleLoop();
+ continue;
+ }
+
+ offset += MAX_PAYLOAD_SIZE;
+ if (!hasEnd) {
+ continue;
+ }
+
+ return offset;
+ } while(millis() - start < OBD_TIMEOUT_LONG);
+ return 0;
+}
+
+bool COBDI2C::btInit(uint16_t baudrate)
+{
+ return sendCommand(CMD_UART_BEGIN, baudrate / 1200);
+}
+
+bool COBDI2C::btSend(byte* data, byte length)
+{
+ return sendCommand(CMD_UART_SEND, 0, data, length);
+}
+
+bool COBDI2C::btReceive(byte* buffer, byte bufsize)
+{
+ if (!sendCommand(CMD_UART_RECV, bufsize)) return false;
+ memset(buffer, 0, MAX_PAYLOAD_SIZE);
+ delay(10);
+ Wire.requestFrom((byte)m_addr, (byte)MAX_PAYLOAD_SIZE, (byte)1);
+ Wire.readBytes((char*)buffer, MAX_PAYLOAD_SIZE);
+ return true;
+}
+
+bool COBDI2C::gpsQuery(GPS_DATA* gpsdata)
+{
+ if (!sendCommand(CMD_GPS_QUERY, 0)) return false;
+ delay(1);
+ Wire.requestFrom((byte)m_addr, (byte)MAX_PAYLOAD_SIZE, (byte)1);
+ Wire.readBytes((char*)gpsdata, MAX_PAYLOAD_SIZE);
+ return true;
+
+}
+
+void COBDI2C::gpsStart(uint32_t baudrate, const char* cmds)
+{
+ sendCommand(CMD_GPS_START, baudrate / 1200, (byte*)cmds, strlen(cmds));
+}
+
+void COBDI2C::gpsStop()
+{
+ sendCommand(CMD_GPS_STOP);
+}
diff --git a/libraries/OBD/OBD.h b/libraries/OBD/OBD.h index 82e1c1a..3ecd6cc 100644 --- a/libraries/OBD/OBD.h +++ b/libraries/OBD/OBD.h @@ -1,139 +1,159 @@ -/************************************************************************* -* Arduino Library for OBD-II UART Adapter -* Distributed under GPL v2.0 -* Copyright (c) 2012~2013 Stanley Huang <stanleyhuangyc@gmail.com> -* All rights reserved. -*************************************************************************/ - -#define OBD_TIMEOUT_SHORT 2000 /* ms */ -#define OBD_TIMEOUT_LONG 7000 /* ms */ -#define OBD_SERIAL_BAUDRATE 38400 -#define OBD_RECV_BUF_SIZE 80 - -#ifndef OBDUART -#if defined(__AVR_ATmega32U4__) || defined(__AVR_ATmega2560__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega644P__) -#define OBDUART Serial1 -#else -#define OBDUART Serial -#endif -#endif - -// mode 0 pids -#define PID_ENGINE_LOAD 0x04 -#define PID_COOLANT_TEMP 0x05 -#define PID_FUEL_PRESSURE 0x0A -#define PID_INTAKE_MAP 0x0B -#define PID_RPM 0x0C -#define PID_SPEED 0x0D -#define PID_TIMING_ADVANCE 0x0E -#define PID_INTAKE_TEMP 0x0F -#define PID_MAF_FLOW 0x10 -#define PID_THROTTLE 0x11 -#define PID_RUNTIME 0x1F -#define PID_FUEL_LEVEL 0x2F -#define PID_DISTANCE 0x31 -#define PID_BAROMETRIC 0x33 -#define PID_CONTROL_MODULE_VOLTAGE 0x42 -#define PID_ABSOLUTE_ENGINE_LOAD 0x43 -#define PID_AMBIENT_TEMP 0x46 -#define PID_ETHANOL_PERCENTAGE 0x52 -#define PID_FUEL_RAIL_PRESSURE 0x59 -#define PID_HYBRID_BATTERY_PERCENTAGE 0x5B -#define PID_ENGINE_OIL_TEMP 0x5C -#define PID_ENGINE_FUEL_RATE 0x5E -#define PID_ENGINE_TORQUE_PERCENTAGE 0x62 -#define PID_ENGINE_REF_TORQUE 0x63 - -// states -#define OBD_DISCONNECTED 0 -#define OBD_CONNECTING 1 -#define OBD_CONNECTED 2 - -unsigned int hex2uint16(const char *p); -unsigned char hex2uint8(const char *p); - -class COBD -{ -public: - COBD():dataMode(1),errors(0),m_state(OBD_DISCONNECTED) {} - virtual void begin(); - virtual bool init(bool passive = false); - virtual bool read(byte pid, int& result, bool passive = false); - virtual void sleep(int seconds); - // Query and GetResponse for advanced usage only - virtual void sendQuery(byte pid); - bool isValidPID(byte pid); - byte getState() { return m_state; } - byte dataMode; - byte errors; - byte pidmap[4 * 4]; - byte vin[17]; -protected: - virtual char* getResponse(byte& pid, char* buffer); - virtual bool getResponseParsed(byte& pid, int& result); - virtual byte receive(char* buffer); - virtual bool available(); - virtual char read(); - virtual void write(char* s); - virtual void write(char c); - virtual void dataIdleLoop() {} - void debugOutput(const char* s); - int normalizeData(byte pid, char* data); - byte m_state; -private: - virtual uint8_t getPercentageValue(char* data) - { - return (uint16_t)hex2uint8(data) * 100 / 255; - } - virtual uint16_t getLargeValue(char* data) - { - return hex2uint16(data); - } - virtual uint8_t getSmallValue(char* data) - { - return hex2uint8(data); - } - virtual int16_t getTemperatureValue(char* data) - { - return (int)hex2uint8(data) - 40; - } -}; - -#define I2C_ADDR 0x62 - -#define MAX_PAYLOAD_SIZE 32 - -#define CMD_QUERY_STATUS 0x10 -#define CMD_SEND_COMMAND 0x11 -#define CMD_QUERY_DATA 0x12 -#define CMD_UART_BEGIN 0x13 -#define CMD_UART_SEND 0x14 -#define CMD_UART_RECV 0x15 - -typedef struct { - uint32_t time; - uint16_t pid; - float value; -} PID_INFO; - -typedef struct { - uint16_t time; - uint8_t message; - uint8_t data; -} COMMAND_BLOCK; - -class COBDI2C : public COBD { -public: - void begin(byte addr = I2C_ADDR); - bool init(); - bool read(byte pid, int& result, bool passive = false); - void write(char* s); - // Bluetooth communication API - bool btInit(uint16_t baudrate = 9600); - bool btSend(byte* data, byte length); - bool btReceive(byte* buffer, byte bufsize); -private: - bool sendCommand(byte cmd, uint8_t data = 0, byte* payload = 0, byte payloadBytes = 0); - byte receive(char* buffer); - byte m_addr; -}; +/*************************************************************************
+* Arduino Library for OBD-II UART/I2C Adapter
+* Distributed under GPL v2.0
+* Visit http://arduinodev.com for more information
+* (C)2012-2014 Stanley Huang <stanleyhuangyc@gmail.com>
+*************************************************************************/
+
+#define OBD_TIMEOUT_SHORT 2000 /* ms */
+#define OBD_TIMEOUT_LONG 7000 /* ms */
+#define OBD_SERIAL_BAUDRATE 38400
+#define OBD_RECV_BUF_SIZE 80
+
+#ifndef OBDUART
+#if defined(__AVR_ATmega32U4__) || defined(__AVR_ATmega2560__) || defined(__AVR_ATmega1280__) || defined(__AVR_ATmega644P__)
+#define OBDUART Serial1
+#else
+#define OBDUART Serial
+#endif
+#endif
+
+// Mode 1 PIDs
+#define PID_ENGINE_LOAD 0x04
+#define PID_COOLANT_TEMP 0x05
+#define PID_FUEL_PRESSURE 0x0A
+#define PID_INTAKE_MAP 0x0B
+#define PID_RPM 0x0C
+#define PID_SPEED 0x0D
+#define PID_TIMING_ADVANCE 0x0E
+#define PID_INTAKE_TEMP 0x0F
+#define PID_MAF_FLOW 0x10
+#define PID_THROTTLE 0x11
+#define PID_RUNTIME 0x1F
+#define PID_FUEL_LEVEL 0x2F
+#define PID_DISTANCE 0x31
+#define PID_BAROMETRIC 0x33
+#define PID_CONTROL_MODULE_VOLTAGE 0x42
+#define PID_ABSOLUTE_ENGINE_LOAD 0x43
+#define PID_AMBIENT_TEMP 0x46
+#define PID_ETHANOL_PERCENTAGE 0x52
+#define PID_FUEL_RAIL_PRESSURE 0x59
+#define PID_HYBRID_BATTERY_PERCENTAGE 0x5B
+#define PID_ENGINE_OIL_TEMP 0x5C
+#define PID_ENGINE_FUEL_RATE 0x5E
+#define PID_ENGINE_TORQUE_PERCENTAGE 0x62
+#define PID_ENGINE_REF_TORQUE 0x63
+
+// states
+#define OBD_DISCONNECTED 0
+#define OBD_CONNECTING 1
+#define OBD_CONNECTED 2
+
+unsigned int hex2uint16(const char *p);
+unsigned char hex2uint8(const char *p);
+
+class COBD
+{
+public:
+ COBD():dataMode(1),errors(0),m_state(OBD_DISCONNECTED) {}
+ virtual void begin();
+ virtual bool init(bool passive = false);
+ virtual bool read(byte pid, int& result, bool passive = false);
+ virtual void sleep(int seconds);
+ // Query and GetResponse for advanced usage only
+ virtual void sendQuery(byte pid);
+ bool isValidPID(byte pid);
+ byte getState() { return m_state; }
+ byte dataMode;
+ byte errors;
+ byte pidmap[4 * 4];
+ byte vin[17];
+protected:
+ virtual char* getResponse(byte& pid, char* buffer);
+ virtual bool getResponseParsed(byte& pid, int& result);
+ virtual byte receive(char* buffer);
+ virtual bool available();
+ virtual char read();
+ virtual void write(char* s);
+ virtual void write(char c);
+ virtual void dataIdleLoop() {}
+ void debugOutput(const char* s);
+ int normalizeData(byte pid, char* data);
+ byte m_state;
+private:
+ virtual uint8_t getPercentageValue(char* data)
+ {
+ return (uint16_t)hex2uint8(data) * 100 / 255;
+ }
+ virtual uint16_t getLargeValue(char* data)
+ {
+ return hex2uint16(data);
+ }
+ virtual uint8_t getSmallValue(char* data)
+ {
+ return hex2uint8(data);
+ }
+ virtual int16_t getTemperatureValue(char* data)
+ {
+ return (int)hex2uint8(data) - 40;
+ }
+};
+
+#define I2C_ADDR 0x62
+
+#define MAX_PAYLOAD_SIZE 32
+
+#define CMD_QUERY_STATUS 0x10
+#define CMD_SEND_COMMAND 0x11
+#define CMD_QUERY_DATA 0x12
+#define CMD_UART_BEGIN 0x13
+#define CMD_UART_SEND 0x14
+#define CMD_UART_RECV 0x15
+#define CMD_GPS_START 0x20
+#define CMD_GPS_STOP 0x21
+#define CMD_GPS_QUERY 0x22
+
+typedef struct {
+ uint32_t time;
+ uint16_t pid;
+ float value;
+} PID_INFO;
+
+typedef struct {
+ uint16_t time;
+ uint8_t message;
+ uint8_t data;
+} COMMAND_BLOCK;
+
+typedef struct {
+ uint32_t time;
+ uint32_t date;
+ float lat;
+ float lon;
+ float speed;
+ float alt;
+ uint8_t sat;
+ uint8_t state;
+ uint16_t age;
+ uint8_t reserved[4];
+} GPS_DATA;
+
+class COBDI2C : public COBD {
+public:
+ void begin(byte addr = I2C_ADDR);
+ bool init();
+ bool read(byte pid, int& result, bool passive = false);
+ void write(char* s);
+ // Bluetooth communication API
+ bool btInit(uint16_t baudrate = 9600);
+ bool btSend(byte* data, byte length);
+ bool btReceive(byte* buffer, byte bufsize);
+ // GPS API
+ bool gpsQuery(GPS_DATA* gpsdata);
+ void gpsStart(uint32_t baudrate = 38400, const char* cmds = 0);
+ void gpsStop();
+private:
+ bool sendCommand(byte cmd, uint8_t data = 0, byte* payload = 0, byte payloadBytes = 0);
+ byte receive(char* buffer);
+ byte m_addr;
+};
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