AD7656 Arduino

saadabd · October 20, 2018, 7:26pm

Hello There,

I am little confused in using AD7656-1 with Arduino Mega.
I have made the following pinout connection for ADC with MEGA as described in the datasheet for Serial Communication, but still, the output array is not changing the values upon the change in analog values.

My pin configuration is as follows
const int CS = 30;
const int CS1 = 53; //dummy pin for SPI
const int CONVST = 14;
const int RESET = 15;
const int NOTSTBY = 31;

I am using code which is mentioned in GIT here

github.com

danzimmerman/arduino-misc/blob/master/acquisition/basic_AD7656_acq.pde

#include <stdio.h>
#include <SPI.h>
#include <TimerOne.h>

/*this is a basic tester for the AD7656 6 channel 16 bit analog-to-digital converter.
It reads all six channels and prints them to the serial port in a loop
*/

//SPI defaults: AD7656 SCLK connected to CLK pin 13 (red) and AD7656 DOUT A connected to MISO pin 12 (Orange)
const int CS = 10; //yellow wire, chip select
const int CONVST = 9; //green = CONVST A, grey = CONVST B, and white = CONVST C, conversion initiated on rising edge (idle high seems OK)
const int RESET = 8; //blue wire, reset pin should be pulsed at power up, CONVST should be high during reset pulse, and conversion takes 3us
const int NOTSTBY = 7; // purple wire, should be written high at beginning, leave high for now (can be used to reduce power consumption)

int Vout[6] = {0,0,0,0,0,0}; //array to hold six voltages (bits for now)
long t0 =0;
long t = 0;
void setup()
{
  Serial.begin(115200);

This file has been truncated. show original

Can anyone please identify the mistake since my output is a constant number with a value of 32767

adc7656.pdf (23.2 KB)

system · October 20, 2018, 7:29pm

Not entirely sure I see what this is doing in "networking".

Also not sure I can see your code.

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AD7656 Arduino

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