I need to measure some analog signal with very high precision for which I require 16bit resolution. I have chosen ADS1119 (datasheet http://www.ti.com/lit/ds/sbas925a/sbas925a.pdf)
I designed the PCB and soldered the components. PCB schematic attached. with Jumper 16 and 17 shorted to VCC and Jumper 18 to ground and 19 to VCC.
I have written the following code to simply set the config register and read it back. (Not even to read the data). Even config register is not getting read ( changed the ADS1119 IC twice just to ensure that there is no hardware problem)
# include <Wire.h>
//Both A0 and A1 address pins connected to VCC. Therefore device address is 0x45
void setup() {
// put your setup code here, to run once:
Serial.begin(115200);
Wire.begin();
delay(1000);
Wire.beginTransmission(0x45);//begin transmission
Wire.write(byte(0B00000110));//Reset command
Wire.write(byte(0B00001000));//Start/Sync command
Wire.endTransmission();//end ttransmission
delay(10);
//Following code is as per section 8.5.3.7 (figure 38) WREG command page 26 of ADS1119 datasheet
Wire.beginTransmission(0x45);//begin transmission
Wire.write(byte(0B10001010));//7bit address with last bit as zero for write mode
Wire.write(byte(0B01000000));//WREG comand
Wire.write(byte(0B01100011));// configuration register data for MUX connected to gnd and AINP, gain 1, 20SPS, Cont. mode, external ref
Wire.endTransmission();//end ttransmission
delay(10);
//Following code is as per section 8.5.3.6 (figure 37) RREG command page 26 of ADS1119 datasheet
Wire.beginTransmission(0x45);//begin transmission
Wire.write(byte(0B10001010));//7bit address with last bit as zero for write mode
Wire.write(byte(0B00100000));//RREG comand with register adress as 0
Wire.write(byte(0B10001011));//7bit address with last bit as one for read mode
delay(10);
Serial.println(Wire.read());
Wire.endTransmission();
delay(10);
}
void loop() {
}
The problem is that the device is not responding at all. Not even to general I2C call of 0x0 address.
All I can see on I2C read on serial monitor is -1.
Can anyone tell me what I am doing wrong?
ADS1119.ino (1.37 KB)
