用c语言控制stm32读写spi的代码，地址是16位，数据是18位，LSB，时钟是40MHz

STM32 中使用 C 语言控制 SPI 读写时，需要先在项目中配置好 SPI 的时钟、GPIO 等相关参数。代码如下：

#include "stm32f4xx_hal.h"

/* SPI handler declaration */
SPI_HandleTypeDef SpiHandle;

/* Buffer used for transmission */
uint8_t aTxBuffer[] = "****SPI - Two Boards communication based on Interrupt **** SPI Message ******** SPI Message ******** SPI Message ****";

/* Buffer used for reception */
uint8_t aRxBuffer[BUFFERSIZE];

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void Error_Handler(void);

int main(void)
{
  /* STM32F4xx HAL library initialization:
       - Configure the Flash prefetch, instruction and Data caches
       - Configure the Systick to generate an interrupt each 1 msec
       - Set NVIC Group Priority to 4
       - Global MSP (MCU Support Package) initialization
     */
  HAL_Init();

  /* Configure the system clock to 180 MHz */
  SystemClock_Config();

  /* Configure LED3 */
  BSP_LED_Init(LED3);

  /*##-1- Configure the SPI peripheral #######################################*/
  /* Set the SPI parameters */
  SpiHandle.Instance               = SPIx;
  SpiHandle.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256;
  SpiHandle.Init.Direction         = SPI_DIRECTION_2LINES;
  SpiHandle.Init.CLKPhase          = SPI_PHASE_1EDGE;
  SpiHandle.Init.CLKPolarity       = SPI_POLARITY_LOW;
  SpiHandle.Init.DataSize          = SPI_DATASIZE_8BIT;
  SpiHandle.Init.FirstBit          = SPI_FIRSTBIT_MSB;
  SpiHandle.Init.TIMode            = SPI_TIMODE_DISABLE;
  SpiHandle.Init.CRCCalculation    = SPI_CRCCALCULATION_DISABLE;
  SpiHandle.Init.CRCPolynomial     = 7;
  SpiHandle.Init.NSS               = SPI_NSS_SOFT;
  SpiHandle.Init.Mode = SPI_MODE_MASTER;

  if(HAL_SPI_Init(&SpiHandle) != HAL_OK)
  {
    /* Initialization Error */
    Error_Handler();
  }
  
  /*##-2- Start the transmission process #####################################*/  
  /* While the SPI in TransmitReceive process, user can transmit data through 
     "aTxBuffer" buffer & receive data through "aRxBuffer" */
  if(HAL_SPI_TransmitReceive(&SpiHandle, (uint8_t*)aTxBuffer, (uint8_t *)aRxBuffer, BUFFERSIZE, 5000) != HAL_OK)