Good day all.
I am starting a new arduino based project.
I am wanting to fit a display to my e-bike battery pack so I can see the voltage of each cell, and total pack voltage.
The e-bike battery pack has 10x 3.7v 20Ah LiPo Cells.
Hardware wise I don't think I will have to much of a problem.
But writing the code for the arduino is where I am going to need help.
I have started work on the code over the last few days
Here is my current code.
/*
<3.00v = FLASHING RED + BUZZER
3.00v - 3.19v = RED
3.20v - 3.39v = CRIMSON
3.40v - 3.59v = ORANGE
3.60v - 3.79v = YELLOW
3.80v - 3.99v = GOLD
4.00v - 4.20v = GREEN
>4.20v = FLASHING RED + BUZZER
Created: 29/06/2013.
Modified: 30/06/2013.
By "Mad Professor"
*/
#include <ColorLCDShield.h>
const int ReadCellVolt = A0; // Analog input pin for sencing battery cell voltage
const int S0 = 2; // Digital output pin for MUX IC (S0 pin)
const int S1 = 3; // Digital output pin for MUX IC (S1 pin)
const int S2 = 4; // Digital output pin for MUX IC (S2 Pin)
const int BUZZER = 5; // PWM output pin for Warning Buzzer
const int BackLight = 6; // Digital output pin for LCD Backlight
const int WakeButton = 7; // Digital input pin for waking up LCD Display
int BG_COLOR = BLACK; // Set LCD Background Color
int TXT_COLOR = WHITE; // Set LCD Text Color
int CV_COLOR = RED; // Set LCD Cell Voltage Color
int PV_COLOR = RED; // Set LCD Pack Voltage Color
int SOC_COLOR = RED; // Set LCD State Of Charge Color
LCDShield lcd;void setup()
{
lcd.init(PHILIPS, 1); // sets LCD type
lcd.contrast(63); // sets LCD contrast (value between 0~63)
lcd.clear(BG_COLOR); // Sets Background Color
lcd.setStr("C01:", 0,0, TXT_COLOR, BG_COLOR); //
lcd.setStr("C02:", 0,65, TXT_COLOR, BG_COLOR); //
lcd.setStr("C03:", 15,0, TXT_COLOR, BG_COLOR); //
lcd.setStr("C04:", 15,65, TXT_COLOR, BG_COLOR); //
lcd.setStr("C05:", 30,0, TXT_COLOR, BG_COLOR); //
lcd.setStr("C06:", 30,65, TXT_COLOR, BG_COLOR); //
lcd.setStr("C07:", 45,0, TXT_COLOR, BG_COLOR); //
lcd.setStr("C08:", 45,65, TXT_COLOR, BG_COLOR); //
lcd.setStr("C09:", 60,0, TXT_COLOR, BG_COLOR); //
lcd.setStr("C10:", 60,65, TXT_COLOR, BG_COLOR); //
lcd.setStr("Pack Voltage", 85,15, BLUE, BG_COLOR); //
}
void loop()
{
// Cell 1
digitalWrite(S2, LOW); //
digitalWrite(S1, LOW); //
digitalWrite(S0, LOW); //
delay(10); //
int sensorValue = analogRead(ReadCellVolt); //
float voltage1 = sensorValue * (5.0 / 1023.0); //
lcd.setStr("0.00", 0,30, CV_COLOR, BG_COLOR); //
// Cell 2
digitalWrite(S2, LOW); //
digitalWrite(S1, LOW); //
digitalWrite(S0, HIGH); //
delay(10); //
sensorValue = analogRead(ReadCellVolt); //
float voltage2 = sensorValue * (5.0 / 1023.0); //
lcd.setStr("0.00", 0,95, CV_COLOR, BG_COLOR); //
// Cell 3
digitalWrite(S2, LOW); //
digitalWrite(S1, HIGH); //
digitalWrite(S0, LOW); //
delay(10); //
sensorValue = analogRead(ReadCellVolt); //
float voltage3 = sensorValue * (5.0 / 1023.0); //
lcd.setStr("0.00", 15,30, CV_COLOR, BG_COLOR); //
// Cell 4
digitalWrite(S2, LOW); //
digitalWrite(S1, HIGH); //
digitalWrite(S0, HIGH); //
delay(10); //
sensorValue = analogRead(ReadCellVolt); //
float voltage4 = sensorValue * (5.0 / 1023.0); //
lcd.setStr("0.00", 15,95, CV_COLOR, BG_COLOR); //
// Cell 5
digitalWrite(S2, HIGH); //
digitalWrite(S1, LOW); //
digitalWrite(S0, LOW); //
delay(10); //
sensorValue = analogRead(ReadCellVolt); //
float voltage5 = sensorValue * (5.0 / 1023.0); //
lcd.setStr("0.00", 30,30, CV_COLOR, BG_COLOR); //
// Cell 6
digitalWrite(S2, HIGH); //
digitalWrite(S1, LOW); //
digitalWrite(S0, HIGH); //
delay(10); //
sensorValue = analogRead(ReadCellVolt); //
float voltage6 = sensorValue * (5.0 / 1023.0); //
lcd.setStr("0.00", 30,95, CV_COLOR, BG_COLOR); //
// Cell 7
digitalWrite(S2, HIGH); //
digitalWrite(S1, HIGH); //
digitalWrite(S0, LOW); //
delay(10); //
sensorValue = analogRead(ReadCellVolt); //
float voltage7 = sensorValue * (5.0 / 1023.0); //
lcd.setStr("0.00", 45,30, CV_COLOR, BG_COLOR); //
// Cell 8
// digitalWrite(S2, HIGH, S1, HIGH, S0, HIGH); //
digitalWrite(S2, HIGH); //
digitalWrite(S1, HIGH); //
digitalWrite(S0, HIGH); //
delay(10); //
sensorValue = analogRead(ReadCellVolt); //
float voltage8 = sensorValue * (5.0 / 1023.0); //
lcd.setStr("0.00", 45,95, CV_COLOR, BG_COLOR); //
// Cell 9
// digitalWrite(S2, ????); //
// digitalWrite(S1, ????); //
// digitalWrite(S0, ????); //
delay(10); //
sensorValue = analogRead(ReadCellVolt); //
float voltage9 = sensorValue * (5.0 / 1023.0); //
lcd.setStr("0.00", 60,30, CV_COLOR, BG_COLOR); //
// Cell 10
// digitalWrite(S2, LOW); //
// digitalWrite(S1, LOW); //
// digitalWrite(S0, LOW); //
delay(10); //
sensorValue = analogRead(ReadCellVolt); //
float voltage10 = sensorValue * (5.0 / 1023.0); //
lcd.setStr("0.00", 60,95, CV_COLOR, BG_COLOR); //
// Pack voltage
lcd.setStr("00.00v", 100,10, PV_COLOR, BG_COLOR); //
// State Of Charge
lcd.setStr("000%", 100,85, SOC_COLOR, BG_COLOR); //
}
I am sure the code can be cleaned up a lot.
The above code was so that I could test the layout on screen, and start getting some working code.
Here is what the above code looks like on screen atm.
I am now starting to work on getting real input voltages to display on the screen.
Later on I would like to text colour to change depending on the cell voltage.
How is my code looking at this point, or is there a better way to go about doing it?
Thanks for your time.
Best Regards.