SPI_HandleTypeDef hspi1;

static void MX_SPI1_Init(void)
{
  hspi1.Instance = SPI1;
  hspi1.Init.Mode = SPI_MODE_MASTER;
  hspi1.Init.Direction = SPI_DIRECTION_2LINES;
  hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
  hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
  hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
  hspi1.Init.NSS = SPI_NSS_SOFT;
  hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_32;
  hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
  hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
  hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
  hspi1.Init.CRCPolynomial = 10;
  if (HAL_SPI_Init(&hspi1) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }
}
W25Q128代码：

#define CS_Pin GPIO_PIN_3
#define CS_GPIO_Port GPIOA
#define ChipSelect() HAL_GPIO_WritePin(CS_GPIO_Port, CS_Pin, GPIO_PIN_RESET)
#define ChipDeselect() HAL_GPIO_WritePin(CS_GPIO_Port, CS_Pin, GPIO_PIN_SET)

#define COMMAND_IDENTIFICATION 0x90

uint8_t buffer_tx[4];
uint8_t buffer_rx[2];

uint16_t GetIdentification()
{
    buffer_tx[0] = COMMAND_IDENTIFICATION;
    buffer_tx[1] = 0x0;
    buffer_tx[2] = 0x0;
    buffer_tx[3] = 0x0;

    ChipSelect();
    HAL_SPI_Transmit(&hspi1, buffer_tx, 4, 1000); // send 0x90, 0x0, 0x0, 0x0
    HAL_SPI_Receive(&hspi1, buffer_rx, 2, 1000); // receive 0xFF, 0xFF
    ChipDeselect();
    return ((uint8_t)buffer_rx[0] << 8) | (uint8_t)buffer_rx[1];
}

int main(void)
{
    MX_SPI1_Init();
    HAL_Delay(1000);
    uint16_t id = GetIdentification();
    printf("Manufacturer ID: 0x%.4X ", id);
    while
    {
    }   
}

根据数据表获取芯片制造商代码，我需要发送0x90和3个虚拟字节。芯片应该返回0xEF，0x17。但由于某种原因，我收到2个字节的0xFF。好吧，我已经在PCB上更换了两次但没有结果的芯片。我仍然收到0xFF，0xFF。我已将逻辑分析仪连接到PCB上的芯片，令我惊讶的是，我得到以下图片：