Hi, support team
My customer has the questions as follow:
I made ADS7038 product in hardware and am testing the firmware.
We are currently conducting an SPI test, but we do not know whether the data received is accurate. It was designed with reference to the C code provided by TI.
STM32f103 MCU was used, and hardware was set to 8 bits, MSB First, Baud Rate 4.5 MBits/s, Clock polarity (CPOL) Low, and Clock Phase (CPHA) 1 Edge.
The data received after reading the SYSTEM_STATUS Register is 0x84. and After 50ms delay, The data received after reading the DATA_CFG Register is 0x84, As such, it comes out the same as the above register value.
Give me some help.
My program is as follows.
tCmd[0] = 0x10;
tCmd[1] = 0x00;
tCmd[2] = 0x00;
__HAL_SPI_ENABLE(&hspi1);
HAL_GPIO_WritePin(GPIOA, SPI1_CS_Pin, GPIO_PIN_RESET);
while (HAL_SPI_GetState(&hspi1)==HAL_SPI_STATE_BUSY_TX);
spi_State = HAL_SPI_Transmit(&hspi1, &tCmd[0], 3,5);
HAL_DMA_STATE_CHANGE(&hspi1);
HAL_GPIO_WritePin(GPIOA, SPI1_CS_Pin, GPIO_PIN_SET);
DWT_Delay_us(10000);
HAL_GPIO_WritePin(GPIOA, SPI1_CS_Pin, GPIO_PIN_RESET);
while (HAL_SPI_GetState(&hspi1)==HAL_SPI_STATE_BUSY_RX);
spi_State = HAL_SPI_Receive(&hspi1, &adcResp[0], 3,5);
HAL_DMA_STATE_CHANGE(&hspi1);
HAL_GPIO_WritePin(GPIOA, SPI1_CS_Pin, GPIO_PIN_SET);
DWT_Delay_us(500000);
tCmd[0] = 0x10;
tCmd[1] = 0x02;
tCmd[2] = 0x00;
__HAL_SPI_ENABLE(&hspi1);
HAL_GPIO_WritePin(GPIOA, SPI1_CS_Pin, GPIO_PIN_RESET);
while (HAL_SPI_GetState(&hspi1)==HAL_SPI_STATE_BUSY_TX);
spi_State = HAL_SPI_Transmit(&hspi1, &tCmd[0], 3,5);
HAL_DMA_STATE_CHANGE(&hspi1);
HAL_GPIO_WritePin(GPIOA, SPI1_CS_Pin, GPIO_PIN_SET);
DWT_Delay_us(10000);
HAL_GPIO_WritePin(GPIOA, SPI1_CS_Pin, GPIO_PIN_RESET);
while (HAL_SPI_GetState(&hspi1)==HAL_SPI_STATE_BUSY_RX);
spi_State = HAL_SPI_Receive(&hspi1, &adcResp[3], 3,5);
HAL_DMA_STATE_CHANGE(&hspi1);
HAL_GPIO_WritePin(GPIOA, SPI1_CS_Pin, GPIO_PIN_SET);
DWT_Delay_us(500000);
Thanks so much.
Best regards,
Yuki
