TPS2HCS08-Q1: Having trouble talking with Microcontroller via SPI

Jonathan,

What phase/polarity settings are you using for your SPI peripheral? What is the clock frequency? If you could share a snippet of the host code (regardless of whatever MCU it is), this would potentially help us understand what is going on. 

A good sort of sanity test would be to try to write 0x0003 to register address 0x07 (this should turn on both channels). For reference, standard header files can be found:

https://www.ti.com/tool/download/HCS-HEADER-FILES

Best Regards,
Tim

I am using an ATSAME54P20 microcontroller that is on a SAME54 curiosity dev board. The phase is data sampling on a leading SCK edge and changed on a trailing SCK edge. The polarity is SCK is low when idle. The clock frequency is 1MHz
This is a snippet of my code

#include <stdio.h>
#include <stdint.h>
#include <stddef.h>                     // Defines NULL
#include <stdbool.h>                    // Defines true
#include <stdlib.h>                     // Defines EXIT_FAILURE
#include <string.h>
#include "definitions.h"                // SYS function prototypes
#include "tps2hcs08.h"                  //Header for EFuse

uint8_t txBuffer[3]= {0x04, 0x00, 0x00 };;
uint8_t rxBuffer[3];
size_t txSize = 3;
size_t rxSize = 3;



//Dummy write

GPIO_PD11_Clear();
RTC_Timer32Start();
while(RTC_Timer32CounterGet() < 0x2);  //for t_ready time
RTC_Timer32Stop();
bool flag = SERCOM0_SPI_WriteRead(&txBuffer, txSize, &rxBuffer, rxSize);
GPIO_PD11_Set();



while(true){

GPIO_PD11_Clear();
SERCOM0_SPI_WriteRead(&txBuffer, txSize, &rxBuffer, rxSize);
GPIO_PD11_Set();

RTC_Timer32Start();
while(RTC_Timer32CounterGet() < 0x2);
RTC_Timer32Stop();

}

Here is also a photo of my osciliscope. The first wave is my CS pin, the second my SCK, the third my SDI, the fourth my SDO

Thank you for helping me with this