LPC11C24 MCU to control DAC8718

[Drake1]

Hello,

I am trying to use an LPC11C24 microcontroller to send digital values to a DAC8718 (https://www.ti.com.cn/cn/lit/ds/symlink/dac8718.pdf) to convert to an analog voltage value. I am attempting to communicate via SPI and I am using mbed.h with the SPI.h capability to send an arbitrary stream of bits to the DAC. However I am not seeing any output on the DAC output. I am communicating via a PCAN-USB dongle. Here is my code:

#include "mbed.h"

CAN can(NC, NC);
DigitalOut chipsel(P2_0);


int main() {
// Init CAN
can.frequency(125000);
// Main loop
SPI device(P2_3, P2_2, P2_1);
device.frequency(1000000);
device.format(16,2); // 16 bits
chipsel = 0;
chipsel = 1;
float response;

while(1) {
response = device.write(0xFFFF);
}

}

What am I doing wrong and what should I do to record output on the DAC?

Thanks, I appreciate this very much.

Drake