1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
/*************************************************************************
* Sample sketch based on OBD-II library for Arduino
* Using a LCD1602 shield to display realtime vehicle data
* Distributed under GPL v2.0
* Copyright (c) 2012 Stanley Huang <stanleyhuangyc@gmail.com>
* All rights reserved.
*************************************************************************/
#include <arduino.h>
#include "OBD.h"
#include "LCD4Bit_mod.h"
//create object to control an LCD.
LCD4Bit_mod lcd = LCD4Bit_mod(2);
COBD obd;
//Key message
unsigned int adc_key_val[5] ={30, 150, 360, 535, 760 };
int NUM_KEYS = 5;
int adc_key_in;
char key=-1;
char oldkey=-1;
unsigned long lastTick = millis();
uint8_t modes[2] = {0, 2};
const char modePids[] = {PID_RPM, PID_SPEED, PID_THROTTLE, PID_ENGINE_LOAD,
PID_COOLANT_TEMP, PID_INTAKE_TEMP, PID_AMBIENT_TEMP, PID_MAF_FLOW,
PID_ABS_ENGINE_LOAD, PID_FUEL_PRESSURE, PID_INTAKE_MAP, PID_BAROMETRIC,
PID_TIMING_ADVANCE, PID_FUEL_LEVEL, PID_RUNTIME, PID_DISTANCE};
const char* modeLabels[] = {
"Engine rpm", "Speed km/h", "Throttle %", "Engine Load %",
"Coolant C", "Intake Air C", "Env. Temp C", "MAF Flow kpa",
"Abs. Load %", "Fuel kpa", "Intake kpa", "Barometer kpa",
"Timing Adv. ", "Fuel Level %", "Run Time", "Distance km"};
const char modePos[] = {8, 8, 11, 12,
11, 11, 11, 9,
11, 9, 9, 10,
12, 11, 8, 10};
const char* modeFmts[] = {"%4u", "%3u", "%3u", "%u",
"%3d", "%3d", "%3d", "%3u",
"%3u", "%3u", "%3u", "%u",
"%3d", "%3u", "%4u:%02u", "%04u"};
#define TOTAL_PIDS (sizeof(modePids) / sizeof(modePids[0]))
// Convert ADC value to key number
char get_key(unsigned int input)
{
char k;
for (k = 0; k < NUM_KEYS; k++) {
if (input < adc_key_val[k])
return k;
}
return -1;
}
void updateMode()
{
lcd.cursorTo(1, 0);
lcd.printIn((char*)modeLabels[modes[0]]);
lcd.cursorTo(2, 0);
lcd.printIn((char*)modeLabels[modes[1]]);
}
bool showData(int index)
{
char buf[16];
int value;
uint8_t mode = modes[index];
uint8_t pid = modePids[mode];
digitalWrite(13, HIGH); // set the LED on
if (!obd.readSensor(pid, value)) {
// display received data on error
lcd.cursorTo(index + 1, 0);
lcd.printIn("Error");
delay(2000);
updateMode();
return false;
}
digitalWrite(13, LOW); // set the LED off
if (pid == PID_RUNTIME) {
sprintf(buf, modeFmts[mode], (unsigned int)value / 60, (unsigned int)value % 60);
} else {
sprintf(buf, modeFmts[mode], value);
}
lcd.cursorTo(index + 1, modePos[mode]);
lcd.printIn(buf);
return true;
}
bool setupConnection()
{
uint8_t errors = 0;
char buf[16];
lcd.clear();
lcd.printIn("Connecting...");
while (!obd.init()) {
lcd.cursorTo(2, 0);
sprintf(buf, "Attempts #%d", ++errors);
lcd.printIn(buf);
}
lcd.clear();
lcd.printIn("Connected!");
delay(1000);
updateMode();
return true;
}
void setup()
{
pinMode(13, OUTPUT); //we'll use the debug LED to output a heartbeat
lcd.init();
obd.begin();
setupConnection();
}
void loop()
{
adc_key_in = analogRead(0); // read the value from the sensor
key = get_key(adc_key_in); // convert into key press
if (key != oldkey) {
delay(50); // wait for debounce time
adc_key_in = analogRead(0); // read the value from the sensor
key = get_key(adc_key_in); // convert into key press
if (key != oldkey)
{
oldkey = key;
if (key >=0){
switch (key) {
case 3: // left key
do {
modes[0] = modes[0] > 0 ? modes[0] - 1 : TOTAL_PIDS - 1;
} while (modes[0] == modes[1]);
break;
case 0: // right key
do {
modes[0] = modes[0] < TOTAL_PIDS - 1 ? modes[0] + 1 : 0;
} while (modes[0] == modes[1]);
break;
case 1: // up key
do {
modes[1] = modes[1] > 0 ? modes[1] - 1 : TOTAL_PIDS - 1;
} while (modes[0] == modes[1]);
break;
case 2: // down key
do {
modes[1] = modes[1] < TOTAL_PIDS - 1 ? modes[1] + 1 : 0;
} while (modes[0] == modes[1]);
break;
}
updateMode();
}
}
}
unsigned long curTick = millis();
if (curTick - lastTick > 500) {
showData(0);
showData(1);
if (obd.errors > 10) {
setupConnection();
}
lastTick = curTick;
}
}
|
