Hi Trevor,

What is the exact sequential process you are using to conduct the multiple data read/writes? Additionally, have you verified (with individual reads) that the contents of registers 0x2B-0x2F were written correctly?

Regards,

Payton

Hi Payton, 

We can read one register at a time using the code below, And using the code below, we can correctly read back 0x2a~0x2f, 

AFE44xx_Reg_Read(42);

AFE44xx_Reg_Read(43);

AFE44xx_Reg_Read(44);

AFE44xx_Reg_Read(45);

AFE44xx_Reg_Read(46);

AFE44xx_Reg_Read(47);

unsigned long AFE44xx_Reg_Read(unsigned char Reg_address)
{
	HAL_StatusTypeDef ret;
	uint8_t recv_char[4] = { 0};
	unsigned long retVal;

	//Enable_AFE44xx_SPI_Read();

	HAL_GPIO_WritePin(AFE_CS_GPIO_Port, AFE_CS_Pin, GPIO_PIN_RESET);

	ret = HAL_SPI_TransmitReceive(&hspi1, (uint8_t*)&Reg_address, (uint8_t*)recv_char, sizeof(recv_char), 1000);
	if (ret != HAL_OK) {
		printf("There is a problem with the SPI HAL_SPI_Transmit %d\r\n", ret);
	}

	HAL_GPIO_WritePin(AFE_CS_GPIO_Port, AFE_CS_Pin, GPIO_PIN_SET);

}

Regarding multiple data reads, we modified the above function by simply increasing the size of the receive buffer and only calling the AFE44xx_Reg_Read(42) function; however, only the value of register 0x2a is correct.。

from uint8_t recv_char[4] = {0};

to uint8_t recv_char[4 + 4 + 4 + 4 + 4 + 4] = {0};

BR

Trevor

Hello Trevor,

Apologies for the delay. Due to a high volume of requests, I'll be able to get you a response by end-of-this-week.

Regards,

Payton