DAC081C081: DAC081C081

void dac0815(){

int ADS_address = 0xD; // Address of our device on the I2C bus
int I2CFile;
unsigned char writeBuf[2]; // Buffer to store the 3 bytes that we write to the I2C device
unsigned char readBuf[2]; // 2 byte buffer to store the data read from the I2C device

int16_t val; // Stores the 16 bit value of our ADC conversion

I2CFile = open("/dev/i2c-0", O_RDWR); // Open the I2C device

ioctl(I2CFile, I2C_SLAVE, ADS_address); // Specify the address of the I2C Slave to communicate with

writeBuf[0] = 0x30; // This sets the 8 MSBs of the config register (bits 15-8) to 11000011
writeBuf[1] = 0x00; // This sets the 8 LSBs of the config register (bits 7-0) to 10000011

write(I2CFile, writeBuf, 2);

readBuf[0]= 0;
readBuf[1]= 0;

usleep(20000);
read(I2CFile, readBuf, 2); // Read the contents of the conversion register into readBuf
printf("DAC 0 : %d %d \n ",readBuf[0],readBuf[1]);

close(I2CFile);

}

void dac08256(){

int ADS_address = 0xD; // Address of our device on the I2C bus
int I2CFile;
unsigned char writeBuf[2]; // Buffer to store the 3 bytes that we write to the I2C device
unsigned char readBuf[2]; // 2 byte buffer to store the data read from the I2C device

int16_t val; // Stores the 16 bit value of our ADC conversion

I2CFile = open("/dev/i2c-0", O_RDWR); // Open the I2C device

ioctl(I2CFile, I2C_SLAVE, ADS_address); // Specify the address of the I2C Slave to communicate with

writeBuf[0] = 0x3F; // This sets the 8 MSBs of the config register (bits 15-8) to 00011111
writeBuf[1] = 0xFF; // This sets the 8 LSBs of the config register (bits 7-0) to 11111111

// Write writeBuf to the ADS1115, the 3 specifies the number of bytes we are writing,
// this begins a single conversion
write(I2CFile, writeBuf, 2);

// Initialize the buffer used to read data from the ADS1115 to 0
readBuf[0]= 0;
readBuf[1]= 0;

usleep(20000);
read(I2CFile, readBuf, 2); // Read the contents of the conversion register into readBuf
printf("DAC FF : %d %d \n ",readBuf[0],readBuf[1]);

close(I2CFile);
}

void analogin(){

int ADS_address = 0xD; // Address of our device on the I2C bus
int I2CFile;
unsigned char writeBuf[3]; // Buffer to store the 3 bytes that we write to the I2C device
unsigned char readBuf[2]; // 2 byte buffer to store the data read from the I2C device

int16_t val; // Stores the 16 bit value of our ADC conversion

I2CFile = open("/dev/i2c-0", O_RDWR); // Open the I2C device

ioctl(I2CFile, I2C_SLAVE, ADS_address); // Specify the address of the I2C Slave to communicate with

// These three bytes are written to the ADS1115 to set the config register and start a conversion
writeBuf[0] = 1; // This sets the pointer register so that the following two bytes write to the config register

writeBuf[1] = 0x44; // This sets the 8 MSBs of the config register (bits 15-8) to 11000011
writeBuf[2] = 0x83; // This sets the 8 LSBs of the config register (bits 7-0) to 10000011

// Write writeBuf to the ADS1115, the 3 specifies the number of bytes we are writing,
// this begins a single conversion
write(I2CFile, writeBuf, 3);

// Initialize the buffer used to read data from the ADS1115 to 0
readBuf[0]= 0;
readBuf[1]= 0;

writeBuf[0] = 0; // Set pointer register to 0 to read from the conversion register
write(I2CFile, writeBuf, 1);
usleep(20000);
read(I2CFile, readBuf, 2); // Read the contents of the conversion register into readBuf
// printf("web analog value: %d %d \n ",readBuf[0],readBuf[1]);
val = readBuf[0] << 8 | readBuf[1]; // Combine the two bytes of readBuf into a single 16 bit result
printf("ADC value: %d ",val);
printf(" Voltage Reading %f (V) \n", (((float)val*0.0625 )/1000) ); // Print the result to terminal, first convert from binary value to mV

close(I2CFile);

}

void main(){
for(;;){
//nalog_IN();
analogin();
sleep (2);
dac08256();
sleep (3);
dac0815();
sleep (3);
}
}