CosmicPiV2I2CSPItest.ino-fd4767be/CosmicPiV2I2CSPItest.ino

#include <SPI.h>
#include <Wire.h>

/* Cosmic Pi SPI test routines - Master version, slave is commented out below. Runs on an Arduino DUE,
    Pinouts:
    MOSI - MOSI
    MISO - MISO
    SCK - SCK
    Pin 10 - Pin 10 (SS)
    GND - GND
    5V - 5V

    The slave echoes the master byte in the next (16 bit) transmission.




  SPI COMMUNICATION TRANSACTION LIST OF COMMANDS

  WRITE OPERATIONS (FOR EACH WRITE, SLAVE MUST SEND BACK THE VALUE IT RECEIVES)

  01  WRITE MSB(16 high bits) HV1_DUTY_CYCLE
  02  WRITE LSB(16 low bits) HV1_DUTY_CYCLE
  03  WRITE MSB(16 high bits) HV2_DUTY_CYCLE
  04  WRITE LSB(16 low bits) HV2_DUTY_CYCLE
  05  WRITE 16 bits LED_DUTY_CYCLE

  READ OPERATIONS (FOR EACH READ, SLAVE MUST SEND BACK THE VALUE OF THE RELATED REGISTER)

  06  READ MSB(16 high bits) HV1_DUTY_CYCLE
  07  READ LSB(16 low bits) HV1_DUTY_CYCLE
  08  READ MSB(16 high bits) HV2_DUTY_CYCLE
  09  READ LSB(16 low bits) HV2_DUTY_CYCLE
  10  READ 16 bits LED_DUTY_CYCLE

  11  WRITE STATUS
  12  READ STATUS


*/

byte CMD = 1;

unsigned int duty_cycle_LED = 81;
unsigned int duty_cycle_channel_A = 100000;
unsigned int duty_cycle_channel_B = 200000;
unsigned int MSB;
unsigned int LSB;
byte val = 0;

//unsigned int response = 0;
unsigned int answer = 0;
byte PSU_parametrized = 0;

#define MCP4725_ADD0 0x60
#define MCP4725_ADD1 0x61

int thresh1 = 255;//12 bit
int thresh2 = 255;//12 bit integer
//int threshhigh = 0;


//setpoints for the HV
int HVset1 = 56;
int HVset2 = 56;

void setup() {
  //setup i2c and init dac's at a reasonable value
  Wire.begin(); // join i2c bus (address optional for master)
  DacUpd(MCP4725_ADD0, thresh1);
  DacUpd(MCP4725_ADD1, thresh2);

  //setup spi
  pinMode(SS, OUTPUT);
  SPI.begin();
  SPI.setBitOrder(MSBFIRST);
  //SPI.setClockDivider(SPI_CLOCK_DIV128 );

  //begin serial
  Serial.begin(9600);


}

void loop() {

  Serial.println("Input a command!");
  Serial.println("[1= set thrshold1; 2= set threshold2, 3= set HV ch1, 4 = set HV ch2, 5 = set HV enables]");
  int cmd = readIntFromSerial();
  switch (cmd) {
    case 1:
      {
        Serial.println("Set a threshold value Ch1[1,4096]: ");
        int value = readIntFromSerial();
        //setThreshold(3, value);
        DacUpd(MCP4725_ADD0, value);
        break;
      }
    case 2:
      {
        Serial.println("Set a threshold value Ch2[1,4096]: ");
        int value = readIntFromSerial();
        //setThreshold(3, value);
        DacUpd(MCP4725_ADD1, value);
        break;
      }
    case 3:
      {
        Serial.println("Input a voltage value Ch1[1=highest,255=lowest,56=nominal]");
        int sendValue = readIntFromSerial();
        //if (sendValue < HV_MAX_VAL) {
        //  Serial.print("HV Value is too high! Setting HV ch2 to:");
        //  Serial.println(HV_MAX_VAL);
        //send the command code
        spi_exchange(2);
        spi_exchange(sendValue);
        break;
       }
    case 4:
      {
        Serial.println("Input a voltage value Ch2[1=highest,255=lowest,56=nominal]");
        int sendValue = readIntFromSerial();
        //if (sendValue < HV_MAX_VAL) {
        //  Serial.print("HV Value is too high! Setting HV ch2 to:");
        //  Serial.println(HV_MAX_VAL);
        //send the command code
        spi_exchange(4);
        spi_exchange(sendValue);
        break;
       }
    case 5:
      {
        Serial.println("disabling HV");
        spi_exchange(11);
        spi_exchange(0);
        
        Serial.println("enabling HV");
        spi_exchange(11);
        spi_exchange(3);
        break;
       }
  }

  delay(500);


}

int spi_exchange(int data) {
  digitalWrite(SS, LOW);
  int response = SPI.transfer16(data);
  Serial.println("SPI Master send command:" + String(data) + " Slave reply:" + String(response));
  digitalWrite(SS, HIGH);
  delay(20);
  return response;
}



int readIntFromSerial(){
  int val = Serial.parseInt();
  while (val == 0){
    delay(100);
    val = Serial.parseInt();
  }
  return val;
}


void DacUpd(int address, int packet1)
{
  Wire.beginTransmission(address);
  Wire.write(64);                     // cmd to update the DAC
  Wire.write(packet1 >> 4);        // the 8 most significant bits...
  Wire.write((packet1 & 15) << 4); // the 4 least significant bits...
  Wire.endTransmission();
  Serial.println("I2C send command:" + String(address) + " data:" + String(packet1));
  

}