Hello Everyone 
I have made a previously a cable tester(code below) and now I was working on a Pin Probe Tester.
For the moment my pin probe tester works fine, but just for one type of cable, if i wish to probe another cable i need to reprogram the arduino. I was thinking if it is possible to use an sd card shield in order to import some variables from a txt file every time i want to change the program.
By variables, i wish to use an rotary encoder and an lcd to navigate the sd card and each time i want to test anoder cable i want just to put another txt file to sd card and select it from my lcd and this variable to change:
// --- Pins that are used for testing ---
int nod[19] = {22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39};
// --- Name of pins ---
String nume[]={ "1-Negru 8","2-Alb 9","3-Alb 10","4-Alb 11","5-Liber","6-Liber","7-Liber","8-Rosu 1","9-Rosu 2","10-Rosu 3","11-Rosu 4","12-Negru 5","13-Negru 6","14-Negru 7","15 Portocaliu","16 Alb-Albastru","17 Alb-Portocaliu","18 Albastru"};
This is my code so far:
#include <Wire.h>
#include <LCD.h>
#include <LiquidCrystal_I2C.h>
#define I2C_ADDR 0x27 // Add your address here. Find it from I2C Scanner
#define BACKLIGHT_PIN 3
#define En_pin 2
#define Rw_pin 1
#define Rs_pin 0
#define D4_pin 4
#define D5_pin 5
#define D6_pin 6
#define D7_pin 7
LiquidCrystal_I2C lcd(I2C_ADDR, En_pin, Rw_pin, Rs_pin, D4_pin, D5_pin, D6_pin, D7_pin);
int probe = 3; //probe
int buzz = 2; //buzzer
int mode = 1; // set the mode
// --- Pins that are used for testing ---
int nod[19] = {22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39};
// --- Name of pins ---
String nume[]={ "1-Negru 8","2-Alb 9","3-Alb 10","4-Alb 11","5-Liber","6-Liber","7-Liber","8-Rosu 1","9-Rosu 2","10-Rosu 3","11-Rosu 4","12-Negru 5","13-Negru 6","14-Negru 7","15 Portocaliu","16 Alb-Albastru","17 Alb-Portocaliu","18 Albastru"};
int lennume=sizeof(nume) / sizeof(nume[0]);
void setup() {
MCUSR = 0; // clear out any flags of prior resets.
lcd.begin (16, 2); // LCD type 16x2
// Switch on the backlight
lcd.setBacklightPin(BACKLIGHT_PIN, POSITIVE);
lcd.setBacklight(HIGH);
lcd.home (); // go home
//setup pins I/O
for (int i = 0; i < lennume+1; i++){
pinMode(nod[i], INPUT_PULLUP); //set all pins as input_pullup
}
pinMode(probe, OUTPUT); //set probe output
pinMode(buzz, OUTPUT); //buzzer
}
void loop() {
lcd.clear();
lcd.print("Pin Probe"); //main title 1st row
lcd.setCursor(0, 1);
lcd.print(""); //main title 2nd row
delay(4500);
//Probe
mode = 1;
while (mode == 1) {
//LCD interface
lcd.clear();
lcd.print(" Probe mode"); //main title
lcd.setCursor(0, 1);
lcd.print("Pin:");
lcd.setCursor(4, 1);
for (int i = 0 ; i < lennume+1; i++) { //check all pins one by one
//reads the output on the pin and if there is a connection with the probe => i = 0 and displays a message, otherwise i remains = 1
if( digitalRead(nod[i])==0){
lcd.print((String) nume[i]);
digitalWrite(buzz, HIGH);
delay(150);
digitalWrite(buzz, LOW);
delay(150);
}
}
delay(100);
}
}
Does anyone want to help me do this project ?
Cable tester Code:
#include <avr/wdt.h> //autoreset
#include <Wire.h>
#include <LCD.h>
#include <LiquidCrystal_I2C.h>
#define I2C_ADDR 0x3F // <<----- Add your address here. Find it from I2C Scanner
#define BACKLIGHT_PIN 3
#define En_pin 2
#define Rw_pin 1
#define Rs_pin 0
#define D4_pin 4
#define D5_pin 5
#define D6_pin 6
#define D7_pin 7
int n = 1;
int data;
LiquidCrystal_I2C lcd(I2C_ADDR, En_pin, Rw_pin, Rs_pin, D4_pin, D5_pin, D6_pin, D7_pin);
//pins
int ledPinFail = 2;
int endA[5] = {3, 4, 5, 6, 7}; //pins end A
int endB[5] = {8, 9, 10, 11, 12}; //pins endB
int pSwitch = 13;
//results
int result[5] = { -1, -1, -1, -1, -1};
int test[5] = { -1, -1, -1, -1, -1};
int counter[5] = { -1, -1, -1, -1, -1};
bool fail = false;
int nume = -1; //local variable for probe
int nume2 = - 1; //local variable for probe
int mode = -1; // set the mode
void setup() {
MCUSR = 0; // clear out any flags of prior resets.
Serial.begin(115200); //serial used for debugging only
lcd.begin (16, 2); // <<----- My LCD was 16x2
// Switch on the backlight
lcd.setBacklightPin(BACKLIGHT_PIN, POSITIVE);
lcd.setBacklight(HIGH);
lcd.home (); // go home
//setup pins
for (int i = 0; i < 5; i++) {
pinMode(endA[i], OUTPUT);//set output pins (end A)
pinMode(endB[i], INPUT_PULLUP);//set input pins (end B)
}
pinMode(pSwitch, INPUT_PULLUP);
}
void loop() {
//run the test
runTest_5x2();
}
void runTest_5x2() {
String resultS = "";
//user interface
lcd.clear();
lcd.print(" USB Tester "); //main title
lcd.setCursor(0, 1);
lcd.print(""); //main2 title
delay(1500);
while (digitalRead(pSwitch)) //buton start #Nu-l sterge!!!
delay(200); //debounce
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Testing Cable..."); //under test message
delay(750);
for (int i = 0; i < 5; i++) {
counter[i] = 0;
for (int j = 0; j < 5; j++) {
digitalWrite(endA[i], LOW); //set all outputs to LOW
}
for (int j = 0; j < 6; j++) { //check for crossed / open circuits vs closed, good, circuits
digitalWrite(endA[j], HIGH); //scan across the inputs in turn
test[i] = digitalRead(endB[i]); //read the output
if (test[i] == 1 && j != i) { //crossed or open circuit
counter[i]++;
result[i] = 10 + j;
}
else if (test[i] == 1 && j == i && result[i] < 10 ) { //Good, closed circuit
result[i] = 0;
}
digitalWrite(endA[j], LOW);
}
delay(50); //delay intre teste
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Testing pins");
lcd.print(i + 1);
if (result[i] == 0) {
lcd.print("");
resultS += "1";
pinMode(ledPinFail, OUTPUT);
digitalWrite(ledPinFail, HIGH);
delay(25);
digitalWrite(ledPinFail, LOW);
delay(25);
}
else if (counter[i] == 5) {
lcd.setCursor(0, 1);
lcd.print("Open grup ");
lcd.print(i + 1);
pinMode(ledPinFail, OUTPUT);
digitalWrite(ledPinFail, HIGH);
delay(250);
digitalWrite(ledPinFail, LOW);
delay(250);
fail = true;
}
else {
lcd.setCursor(0, 1);
lcd.print("Short/Cross ");
lcd.print(i + 1);
pinMode(ledPinFail, OUTPUT);
digitalWrite(ledPinFail, HIGH);
delay(250);
digitalWrite(ledPinFail, LOW);
delay(250);
fail = true;
}
}
lcd.setCursor(0, 0);
delay(1000);
if (fail) {
lcd.clear();
lcd.print("Bad Cable"); //Fail cable
//buzzer
/*
pinMode(ledPinFail, OUTPUT);
digitalWrite(ledPinFail, HIGH);
delay(1000);
*/
}
else {
Serial.println();
lcd.clear();
lcd.print("OK Cable"); //OK cable
lcd.setCursor(0, 2);
lcd.print("Auto Reset");
}
delay(70); //debounce
wdt_enable(WDTO_15MS); // turn on the WatchDog and don't stroke it.
for (;;) {
}
}