SPI & ADIS16251

[laleh22]

Hi
I want to analyze ADIS16251ACCZ output in PC.
I have used micro (atmega16) and connect ADIS16251ACCZ to micro and then connect micro to PC. how can I drive ADIS16251ACCZ?
micro can send and receive only 8 bit but sensor have 16 bit data frame!!

This is my code in code vision program.
please check it. I can't have correct output in PC.
please help me.

thanks



Chip type : ATmega16

Program type : Application

Clock frequency : 1.000000 MHz

Memory model : Small

External SRAM size : 0

Data Stack size : 256

*****************************************************/



#include <mega16.h>



// Standard Input/Output functions

#include <stdio.h>

#include <delay.h>

// SPI functions

#include <spi.h>



// Declare your global variables here



void main(void)

{

// Declare your local variables here

int d1;

int d2;

// Input/Output Ports initialization

// Port A initialization

// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In

// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T

PORTA=0x00;

DDRA=0x00;



// Port B initialization

// Func7=Out Func6=In Func5=Out Func4=Out Func3=In Func2=In Func1=In Func0=In

// State7=0 State6=T State5=0 State4=0 State3=T State2=T State1=T State0=T

PORTB=0x00;

DDRB=0xB0;



// Port C initialization

// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In

// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T

PORTC=0x00;

DDRC=0x00;



// Port D initialization

// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In

// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T

PORTD=0x00;

DDRD=0x00;


// USART initialization

// Communication Parameters: 8 Data, 1 Stop, No Parity

// USART Receiver: Off

// USART Transmitter: On

// USART Mode: Asynchronous

// USART Baud Rate: 1200

UCSRA=0x00;

UCSRB=0x08;

UCSRC=0x86;

UBRRH=0x00;

UBRRL=0x33;


// SPI initialization

// SPI Type: Master

// SPI Clock Rate: 250.000 kHz

// SPI Clock Phase: Cycle Start

// SPI Clock Polarity: High

// SPI Data Order: MSB First

SPCR=0x5C;

SPSR=0x00;



//Factory Calibration Restore ########################################

PORTB.4=0;

spi(0b10111110);

spi(0b00000010);

PORTB.4=1;



delay_us(50);



PORTB.4=0;

spi(0b10111111);

spi(0b00000000);

PORTB.4=1;



delay_us(50);



while (1)

{

//Reading GYRO_OUT#########################################

PORTB.4=0;

spi(0b00000101);

spi(0b00000000);

PORTB.4=1;



delay_us(50);



PORTB.4=0;

d1=spi(0);

d2=spi(0);

PORTB.4=1;



delay_us(50);



printf("d1=%d",d1);//sending to PC

printf("d2=%d",d2);//);//sending to PC

delay_ms(400);

};

}

 

[Harald Kapp]

Perhaps you find useful information here: http://www.engineersgarage.com/embe...-serial-peripheral-interface-tutorial-circuit

Harald