ADAS1000 interfacing by Arduino Uno

The simple answer it yet it is very possible

If you look here, you will see some examples of my using an UNO to talk to a TI SPI DAC  http://www.element14.com/community/groups/arduino/blog/2015/07/28/arduino-and-how-to-drive-the-dac8734-from-ti-aka-the-dac8734evm-road-test-board

the principals are the same, just the commands will change

Peter

The simple answer it yet it is very possible

If you look here, you will see some examples of my using an UNO to talk to a TI SPI DAC  http://www.element14.com/community/groups/arduino/blog/2015/07/28/arduino-and-how-to-drive-the-dac8734-from-ti-aka-the-dac8734evm-road-test-board

the principals are the same, just the commands will change

Peter

Dear Sir,

Thank you very much. You looks experienced engineer and helpful.

The device I am talking about its ADAS1000, http://www.analog.com/media/en/technical-documentation/data-sheets/ADAS1000_1000-1_1000-2.pdf

Its SPI protocol is little complected as 4 bytes data has to be  read,send, receive at a same time. 

ADAS1000 datasheet gives the SPI  configuration in page 50-52. For 2kHz setting there is frame or data packet rate. Dont you think, clock divider datamode ect for Arduino Uno should be added? How about serial braud rate?

Besides CS pin, if you look in clock at figure 2 there is another pin called DRDY (data ready pin) . The logic is it should be always LOW when CS is HIGH. How to define this function in  code? Should we need inturrupt for DRDY pin?

You can see there is 16 bit or 24 bit data format. According to 28 table the ECGTCL register adress is 0x01 and if you arrange this Enable mode from the bottom of the column  like 1000110...... (for example), it make sense. Now question is how to read and write this data? What should be ADAS 1000 read and write command for this register?

I saw ADAS1000 SPI is done by  YRDKRX62N(https://wiki.analog.com/resources/tools-software/uc-drivers/renesas/adas1000)  eval board which is more complicated code having different main file and header. They tried to manage all device configuration.

Here we go ...kindly help me to make correction please, I

// SPI

#define DOUT 11 //MOSI

#define DIN 12 //MISO

#define SPICK 13 //SCK

// pins

#define PIN_CS    7

#define PIN_DRDY  6

// the ADAS communicates using SPI, so include the library:

#include <SPI.h>

int DRDY = 6;

int CS = 7;

union FourByte{

   struct {

     unsigned long value:32; //32bit register values go in here

     byte command:8; //8bit command goes in here.

   };

   byte bit8[4]; //this is just used for efficient conversion of the above into 4 bytes.

};

void setup() {

  Serial.begin(115200);

  // start the SPI library:

  SPI.begin();

  SPI.setDataMode(SPI_MODE3);

  SPI.setClockDivider(SPI_CLOCK_DIV16);

  SPI.setBitOrder(MSBFIRST);

  // initalize the  data ready and chip select pins:

  pinMode(DRDY, INPUT);

  pinMode(CS, OUTPUT);

}

void loop(){

unsigned long register = SPI_read(0x01);

Serial.print("register=");

Serial.println(register);

delay(100);

}

void SPI_write(union FourByte data) {

digitalWrite(CS,LOW); //Using CS pin, so sync1/sync0 bytes not needed

for(char i = 3; i >= 0; i--){

   SPI.transfer(data.bit8); //transfer all 4 bytes of data - command first, then Big Endian transfer of the 32bit value.
}
digitalWrite(CS,HIGH);
}

unsigned long SPI_read(byte command){
digitalWrite(CS,LOW); //SS goes low to mark start of transmission
union FourByte data = {0xF804BE,command}; //generate the data to be sent, i.e. your command plus the Sync bytes.
for(char i = 3; i >= 0; i--){
   data.bit8 = SPI.transfer(data.bit8); //send the data whilst reading in the result
}
digitalWrite(CS,HIGH); //SS goes high to mark end of transmission
return data.value; //return the 32bit value recieved.
}