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authorStanley Huang <stanleyhuangyc@gmail.com>2013-06-10 13:21:54 +0800
committerStanley Huang <stanleyhuangyc@gmail.com>2013-06-10 13:21:54 +0800
commitf99f21926e515cf93e2af35eb82808f337998738 (patch)
treeba931f65405704517acc543a4e96fc521fe3212e /obdlogger/OBD.cpp
parent47c6ff979fea8051c02fb38fe99c0021880a4ed8 (diff)
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update OBD logger
Diffstat (limited to 'obdlogger/OBD.cpp')
-rw-r--r--obdlogger/OBD.cpp286
1 files changed, 0 insertions, 286 deletions
diff --git a/obdlogger/OBD.cpp b/obdlogger/OBD.cpp
deleted file mode 100644
index 55f31e6..0000000
--- a/obdlogger/OBD.cpp
+++ /dev/null
@@ -1,286 +0,0 @@
-/*************************************************************************
-* OBD-II (ELM327) data accessing library for Arduino
-* Distributed under GPL v2.0
-* Copyright (c) 2012 Stanley Huang <stanleyhuangyc@gmail.com>
-* All rights reserved.
-*************************************************************************/
-
-#include <Arduino.h>
-#include <avr/pgmspace.h>
-#include "OBD.h"
-
-#define INIT_CMD_COUNT 4
-#define MAX_CMD_LEN 6
-
-const char PROGMEM s_initcmd[INIT_CMD_COUNT][MAX_CMD_LEN] = {"ATZ\r","ATE0\r","ATL1\r","ATI\r"};
-const char PROGMEM s_searching[] = "SEARCHING";
-const char PROGMEM s_cmd_fmt[] = "%02X%02X 1\r";
-const char PROGMEM s_cmd_sleep[] = "atlp\r";
-const char PROGMEM s_cmd_vin[] = "0902\r";
-const char PROGMEM s_response_begin[] = "41 ";
-
-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);
-}
-
-void COBD::Query(unsigned char pid)
-{
- char cmd[8];
- sprintf_P(cmd, s_cmd_fmt, dataMode, pid);
- write(cmd);
-}
-
-bool COBD::ReadSensor(byte pid, int& result, bool passive)
-{
- // send a query command
- Query(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()
-{
- return OBDUART.read();
-}
-
-void COBD::write(const char* s)
-{
- OBDUART.write(s);
-}
-
-void COBD::write(const char c)
-{
- OBDUART.write(c);
-}
-
-int COBD::GetConvertedValue(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:
- result = GetTemperatureValue(data);
- break;
- case PID_ABS_ENGINE_LOAD:
- 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:
- case PID_RUNTIME:
- result = GetLargeValue(data);
- break;
- default:
- result = GetSmallValue(data);
- }
- return result;
-}
-
-char* COBD::GetResponse(byte& pid, char* buffer)
-{
- unsigned long startTime = millis();
- byte i = 0;
-
- for (;;) {
- if (available()) {
- char c = read();
- buffer[i] = c;
- if (++i == OBD_RECV_BUF_SIZE - 1) {
- // buffer overflow
- break;
- }
- if (c == '>' && i > 6) {
- // prompt char reached
- break;
- }
- } else {
- buffer[i] = 0;
- unsigned int timeout;
- if (dataMode != 1 || strstr_P(buffer, s_searching)) {
- timeout = OBD_TIMEOUT_LONG;
- } else {
- timeout = OBD_TIMEOUT_SHORT;
- }
- if (millis() - startTime > timeout) {
- // timeout
- errors++;
- break;
- }
- DataIdleLoop();
- }
- }
- buffer[i] = 0;
-
- char *p = buffer;
- while ((p = strstr_P(p, s_response_begin))) {
- 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 = GetConvertedValue(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;
-}
-
-bool COBD::Init(bool passive)
-{
- unsigned long currentMillis;
- unsigned char n;
- char prompted;
- char buffer[OBD_RECV_BUF_SIZE];
-
- for (unsigned char i = 0; i < INIT_CMD_COUNT; i++) {
- if (!passive) {
- char cmd[MAX_CMD_LEN];
- strcpy_P(cmd, s_initcmd[i]);
- write(cmd);
- }
- n = 0;
- prompted = 0;
- currentMillis = millis();
- for (;;) {
- if (available()) {
- char c = read();
- if (c == '>') {
- buffer[n] = 0;
- prompted++;
- } else if (n < OBD_RECV_BUF_SIZE - 1) {
- buffer[n++] = c;
- }
- } else if (prompted) {
- break;
- } else {
- unsigned long elapsed = millis() - currentMillis;
- if (elapsed > OBD_TIMEOUT_INIT) {
- // init timeout
- //WriteData("\r");
- return false;
- }
- InitIdleLoop();
- }
- }
- }
-
- // load pid map
- memset(pidmap, 0, sizeof(pidmap));
- for (byte i = 0; i < 4; i++) {
- byte pid = i * 0x20;
- Query(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);
- }
- }
- errors = 0;
- return true;
-}