spiMaster8.ino

// Based on Code Written by Nick Gammon// February 2011
//TPA and B reading well from 1802. Now reading address from MA0..MA7 directly.Wed Jul  1 12:20:36 NZST 2020
/*Sat Jul  4 13:29:59 NZST 2020. C:\Users\Dell\Documents\Arduino\PB_Sketches_May20\spiMaster6\spiMaster6.ino

*/
#include <SPI.h>
#define TPAPin 8
#define TPBPin 9

byte adrHi=0x12;
byte adrLo=0x34;

void setup (void)
{
Serial.begin (115200);
	pinMode(TPAPin,INPUT);
	pinMode(TPBPin,INPUT);
	DDRD=0x0;
	DDRC=0x0;
	pinMode(SS, OUTPUT);
	//Serial.begin (115200);   // debugging
	digitalWrite(SS, HIGH);  // ensure SS stays high for now
	SPI.begin ();
	SPI.setClockDivider(SPI_CLOCK_DIV8); // Slow down the master a bit
}  // end of setup


void loop (void) {
		if (digitalRead(TPAPin)==HIGH) {
			doTPAStuff();
		}
		if (digitalRead(TPBPin)==HIGH) {
			doTPBStuff();
		}
}

 void SPITx2(void) { //send two adresses via spi
	digitalWrite(SS, LOW);    // SS is pin 10
	SPI.transfer(adrHi);
	delayMicroseconds(8); //2 microsecond delay seems to work but not 1 uS. Check  nano when this comes up.
	SPI.transfer(adrLo);
	digitalWrite(SS, HIGH);
}  // -------------------end of loop


void doTPAStuff(void) {
	adrHi = (PIND & 0xf0)| (PINC & 0x0f);
	while(digitalRead(TPAPin) ==HIGH) {  }; //do nothing
	Serial.print("$");Serial.print(adrHi,HEX);
}
void doTPBStuff(void) {
	byte temp;
	adrLo= (PIND & 0xf0) | (PINC & 0x0f);
	temp = adrLo;
	SPITx2();		//send adrHi and adrLo to Nb
	while(digitalRead(TPBPin) ==HIGH) {  }; //do nothing
	Serial.print(" ");Serial.println(adrLo,HEX);
	//Serial.print(" ! ");Serial.println(temp,HEX);

}