spi, registers, and values

Using Arduino Networking, Protocols, and Devices
1

Hello all, I have a ADIS16210. I am able to read from it all right, but my question comes about how do I write to the registers? I have a specific address, and a specific value, but how do I program the Arduino to do that?
Is is just 2 consecutive spi.transfers?
Here is the datasheet http://www.analog.com/static/imported-files/data_sheets/ADIS16210.pdf
look at table 23

Thanks,
Mike

2

Pretty much - that's how you shift 16 bits out.

3

Here is the code that I have. I can read from the sensor fine, but it's still the default 1 sample per second. I would like to get 128 samples per second. Thanks!

#include <SPI.h>

int ss=10;
int ax, ax_l, ay, az;
int datax, datay, dataz; 

void setup()
{
  Serial.begin (9600);
  pinMode(ss, LOW); //
  SPI.begin(); //
  SPI.setDataMode(SPI_MODE3);
  SPI.setBitOrder(MSBFIRST);   
  SPI.setClockDivider(SPI_CLOCK_DIV16); 
  
  digitalWrite(ss, LOW);
  SPI.transfer(0x38);
  SPI.transfer(0x0002);
  digitalWrite(ss, HIGH);
  delay(5);
}

void loop()
{
 digitalWrite(ss,LOW);
 ax=SPI.transfer(0x0C);
 ax_l = SPI.transfer(0);
 digitalWrite(ss,HIGH);

 datax=(ax<<8) | ax_l;
 Serial.print("X Accel: ");
 Serial.println(datax, DEC);
 delay(25);
}
4

Increase with serial port speed
decrease the SPI clock divider
reduce/delete the delays

5

dhenry, your totally useless answer has been deleted.
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