Hi all

I'm new to mbed and SPI.
I really have a little knowledge on how to program all of this device .

I have to read the register value from TC77 (http://ww1.microchip.com/downloads/en/devicedoc/20092a.pdf) but i don't understand much on how to read the value from The SPI.

#include "mbed.h"

DigitalOut myled(LED1);

Serial pc(USBTX, USBRX);

SPI spi(p5,p6,p7);

DigitalOut ss(p8);

int main() {

spi.format(8,0);

spi.frequency(100000);

wait(1);

pc.printf("SPI formet: 8,0\nSPI frequency = 1kHz\n");

ss=0;

pc.printf("chip selected enable\n");

int Temp1 = spi.write(0x00);    //I'm not sure about this one bit i see this on the hand book iint whoami = spi.write(0x00);

int Temp2 = spi.write(0x00);    //The data i should receive is 16 bit so this is the second 8 bit data

pc.printf("register value Temp1 = %d Temp2 = %d\n",Temp1,Temp2);

ss=1;

pc.printf("chip selected disable\n");

}

What i got is Temp1 = 0 and Temp2 = 0

I try to look at the datasheet and check whether i should send any command to the tc77 but i couldn't find out ( It said in the datasheet that tc77 will send the data after cs was enable If i don't miss understand).

Any help would be appreciated.

Thank you