Learning how to work the forum... Here's my code:
#include <string.h>
#include <ctype.h>
#include <SD.h>
//------Thermocouple multiplexer definitions-----
#define SHOWMEYOURBITS // display MUX raw bits on Serial
#define TCPINA0 4 //Mux Address 0 pin
#define TCPINA1 5 //Mux Address 1 pin
#define TCPINA2 6 //Mux Address 2 pin
#define TCPINEN 7 //Mux Enable pin
#define TCPINSO 8 //TCAmp Slave Out pin (MISO) [Pin 12 on shield]
#define TCPINCS 9 //TCAmp Chip Select
#define TCPINSC 13 //TCAmp Serial Clock (SCK)
int temperatures[8], internalTemperatures[8], sensorFail[8]; //Temperature, internal temperature, and sensor failure flags
char failMode[8]; //Failure codes
unsigned int Mask; //Temperature value storage during read
//-----SD Variable Definitions-----
#define SDPINCS 10 //SD Chip Select
unsigned int fileNumber = 0; //SD card file search index
File dataFile; //data output file
File configFile; //configuration input file
/*
Add instructions for configFile configuration
*/
//-----General use variables-----
#define LEDPIN 2 //General LED pin to indicate SD writing (or whatever)
char i; //general use integer
String buf; //general use string
void setup()
{
//-----Open serial communications-----
Serial.begin(9600);
//-----INITIALIZE MULTIPLEXER-----
pinMode(TCPINEN, OUTPUT);
pinMode(TCPINA0, OUTPUT);
pinMode(TCPINA1, OUTPUT);
pinMode(TCPINA2, OUTPUT);
pinMode(TCPINSO, INPUT);
pinMode(TCPINCS, OUTPUT);
pinMode(TCPINSC, OUTPUT);
digitalWrite(TCPINEN, LOW);
//-----INITIALIZE SD CARD-----
Serial.print("Initializing SD Card...\r\n");
pinMode(SDPINCS,OUTPUT);
if (!SD.begin(SDPINCS)) {
Serial.println("SD initialization failed!");
return;
}
Serial.println("SD initialization done.");
//-----OPEN CONFIG.TXT FILE-----
if (SD.exists("config.txt")){
configFile = SD.open("config.txt", FILE_READ);
Serial.println("Reading config.txt:");
if (configFile){
while (configFile.available()){
Serial.write(configFile.read()); //list contents of config.txt. Replace later to read configuration settings.*****
}
Serial.write("\n");
}
configFile.close();
}
else {
Serial.println("Error reading config.txt");
// return;
}
//-----OPEN NEXT AVAILABLE CSV Fx.CSV, WHERE x IS THE NEXT AVAILABLE FILE NUMBER-----
char charFileName[0];
do{
buf=String(String("f" + String(fileNumber,DEC)) + ".csv");
buf.toCharArray(charFileName, buf.length()+1);
fileNumber++;
}while (SD.exists(charFileName));
Serial.println(String("Creating new data file " + buf));
dataFile = SD.open(charFileName,FILE_WRITE);
dataFile.println("Temp0,Temp1,Temp2,Temp3,Temp4,Temp5,Temp6,Temp7");
}
void loop()
{
if (millis()<10000){//Temporary limit for debugging
digitalWrite(SDPINCS,HIGH);//disable SD serial
digitalWrite(TCPINEN, HIGH); // enable TC serial
getTemp();
digitalWrite(TCPINEN,LOW);//disable TC serial
digitalWrite(SDPINCS,LOW);//enable SD serial
Serial.print("\n");
for (i=0;i<8;i++){
Serial.print(millis()); //used as an example to debug instead of temperatures, below.
Serial.print(","); //used as an example to debug instead of temperatures, below.
dataFile.print(millis()); //used as an example to debug instead of temperatures, below.
dataFile.print(","); //used as an example to debug instead of temperatures, below.
// Serial.print(((float)temperatures[i]*0.25),2);
// Serial.print(",");
// dataFile.print(((float)temperatures[i]*0.25),2);
// dataFile.print(",");
}
Serial.print("\n");
dataFile.print("\n");
delay(1000);
} else
if (dataFile){
dataFile.close();
Serial.println("Data file closed.");
}
}//end of loop
void getTemp()
//Obtains current temperature, error, and error codes for all eight channels.
{
int ch; //current channel
for (ch=0;ch<8;ch++){
temperatures[ch] = 0;
failMode[ch] = 0;
sensorFail[ch] = 0;
internalTemperatures[ch]=0;
//initialize
digitalWrite(TCPINSC,LOW);//disable bit read (initialization)
digitalWrite(TCPINCS,LOW);//disable TC conversion (initialization)
delay (5);
//convert temperature on mutliplexer
selectChannel(ch);
digitalWrite(TCPINCS,HIGH);//begin TC conversion
delay(100);
digitalWrite(TCPINCS,LOW);//end TC conversion
delay(1);
//read bits
for (i=31;i>=0;i--){
digitalWrite(TCPINSC, HIGH); //get next bit
delay(1);
#ifdef SHOWMEYOURBITS
if (digitalRead(TCPINSO)==1){ //current bit is received as 1
Serial.print("1");
} else{//current bit was received as 0
Serial.print("0");
}
if (i==0){
Serial.print("\n");
}
#endif
if ((i<=31) && (i>=18)){ //thermocouple temperature data is being read
Mask = 1<<(i-18); //convert current bit number (i) to integer value and store in Mask
if (digitalRead(TCPINSO)==1){ //current bit is received as 1
if (i==31){ //sign bit is being read
temperatures[ch] += (0b11<<14);
}
temperatures[ch] += Mask; //add Mask value to the temperature
}//current bit was received as 0, so do nothing
}
//bit 17 is reserved, do nothing with bit 17.
if (i==16){ //read sensor fail bit
sensorFail[ch] = digitalRead(TCPINSO);
}
if ((i<=15) && (i<=4)){ //internal temperature data is being read
Mask = 1<<(i-4); //convert current bit number (i) to integer value and store in Mask
if (digitalRead(TCPINSO) == 1) { //current bit received as 1
if (i==15){ //internal temp is negative
internalTemperatures[ch] += (0b1111<<12);
}
internalTemperatures[ch] += Mask; //add Mask value to the internal temperature
} //current bit was received as 0, so do nothing
}
//bit 3 is reserved, do nothing with bit 3.
if (i==2){
failMode[ch]+=digitalRead(TCPINSO)<<2; //bit 2 is set if shorted to VCC
}
if (i==1){
failMode[ch]+=digitalRead(TCPINSO)<<1; //bit 1 is set if shorted to ground
}
if (i==0){
failMode[ch]+=digitalRead(TCPINSO)<<0; //bit 0 is set if tc is open circuit
}
digitalWrite(TCPINSC, LOW);//stop reading current bit
delay(1);
}
}
}
void selectChannel(int j)
//Sets thermocouple multiplexer outputs to select thermocouple input channel ch (1-8)
{
if (j<0 or j>7){
Serial.println("Invalid thermocouple channel selection");
j=0;
}
switch (j)
{
case 0:
digitalWrite(TCPINA0, LOW);
digitalWrite(TCPINA1, LOW);
digitalWrite(TCPINA2, LOW);
break;
case 1:
digitalWrite(TCPINA0, HIGH);
digitalWrite(TCPINA1, LOW);
digitalWrite(TCPINA2, LOW);
break;
case 2:
digitalWrite(TCPINA0, LOW);
digitalWrite(TCPINA1, HIGH);
digitalWrite(TCPINA2, LOW);
break;
case 3:
digitalWrite(TCPINA0, HIGH);
digitalWrite(TCPINA1, HIGH);
digitalWrite(TCPINA2, LOW);
break;
case 4:
digitalWrite(TCPINA0, LOW);
digitalWrite(TCPINA1, LOW);
digitalWrite(TCPINA2, HIGH);
break;
case 5:
digitalWrite(TCPINA0, HIGH);
digitalWrite(TCPINA1, LOW);
digitalWrite(TCPINA2, HIGH);
break;
case 6:
digitalWrite(TCPINA0, LOW);
digitalWrite(TCPINA1, HIGH);
digitalWrite(TCPINA2, HIGH);
break;
case 7:
digitalWrite(TCPINA0, HIGH);
digitalWrite(TCPINA1, HIGH);
digitalWrite(TCPINA2, HIGH);
break;
}
}//end of selectChannel