RW_VCO

RW_VCO

#include "mbed.h"
 
SPI spi(p5, p6, p7); // mosi, miso, sclk
DigitalOut cs(p8);
 
int main() {
  
    
    // Chip must be deselected
    cs = 1;

    // Setup the spi for 8 bit data, high steady state clock,
    // second edge capture, with a 1MHz clock rate
    spi.format(8,1);
    spi.frequency(1000000);
 
    // Select the device by seting chip select low (inverted logic)
    cs = 0;
 
    // Send 0x00, 0x00, the command to read the WHOAMI register, bytes sent in "backwards" (LSB) order
    spi.write(0x00);//data being written to AD5791
    spi.write(0x00);//data being written to AD5791
    spi.write(0x10);//data being written to AD 5791 and bits to specify that you are writing to AD5791 
    
 
 
    // Send a dummy byte to receive the contents of the WHOAMI register, bytes sent in "backwards" (LSB) order
    int whoami = spi.write(0x00);
    int second = spi.write(0x00);
    int third = spi.write(0x90);
    printf("WHOAMI register = 0x%X ", whoami);
    printf("second register = 0x%X ", second);
    printf("third register = 0x%X ", third);
    printf("I work.\n");
 
    // Deselect the device
    cs = 1;
}