写一个完整的AT32F421C8T7通过SPI读取ICP20100相对高度的代码

以下是一个简单的AT32F421C8T7通过SPI读取ICP20100相对高度的代码，供参考：

#include <stdio.h>
#include "AT32F421xx.h"

#define ICP20100_CS_PIN GPIO_PIN_4
#define ICP20100_CS_PORT GPIOB

void SPI_Init(void)
{
    SPI_InitType  SPI_InitStructure;
    GPIO_InitType GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2PERIPH_GPIOB, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2PERIPH_SPI1, ENABLE);

    GPIO_InitStructure.GPIO_Pins = GPIO_Pins_3 | GPIO_Pins_4 | GPIO_Pins_5;
    GPIO_InitStructure.GPIO_MaxSpeed = GPIO_MaxSpeed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
    SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
    SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
    SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
    SPI_Init(SPI1, &SPI_InitStructure);

    SPI_Cmd(SPI1, ENABLE);
}

void ICP20100_Init(void)
{
    GPIO_InitType GPIO_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2PERIPH_GPIOB, ENABLE);

    GPIO_InitStructure.GPIO_Pins = ICP20100_CS_PIN;
    GPIO_InitStructure.GPIO_MaxSpeed = GPIO_MaxSpeed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_Init(ICP20100_CS_PORT, &GPIO_InitStructure);

    GPIO_SetBits(ICP20100_CS_PORT, ICP20100_CS_PIN);
}

void ICP20100_Read(uint16_t *pData)
{
    uint8_t txData[3] = {0x10, 0x00, 0x00};
    uint8_t rxData[3] = {0x00, 0x00, 0x00};

    GPIO_ResetBits(ICP20100_CS_PORT, ICP20100_CS_PIN);

    while (SPI_I2S_GetFlagStatus(SPI1, SPI_FLAG_TBE) == RESET);
    SPI_I2S_SendData(SPI1, txData[0]);
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_FLAG_RBNE) == RESET);
    rxData[0] = SPI_I2S_ReceiveData(SPI1);

    while (SPI_I2S_GetFlagStatus(SPI1, SPI_FLAG_TBE) == RESET);
    SPI_I2S_SendData(SPI1, txData[1]);
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_FLAG_RBNE) == RESET);
    rxData[1] = SPI_I2S_ReceiveData(SPI1);

    while (SPI_I2S_GetFlagStatus(SPI1, SPI_FLAG_TBE) == RESET);
    SPI_I2S_SendData(SPI1, txData[2]);
    while (SPI_I2S_GetFlagStatus(SPI1, SPI_FLAG_RBNE) == RESET);
    rxData[2] = SPI_I2S_ReceiveData(SPI1);

    GPIO_SetBits(ICP20100_CS_PORT, ICP20100_CS_PIN);

    *pData = (rxData[1] << 8) | rxData[2];
}

int main(void)
{
    uint16_t height;

    SPI_Init();
    ICP20100_Init();

    while (1)
    {
        ICP20100_Read(&height);
        printf("ICP20100 height: %d\n", height);
    }
}

这个代码主要是通过SPI读取ICP20100的数据，其中包括初始化SPI和ICP20100，以及读取ICP20100的高度数据并打印出来。需要注意的是，在这个代码中，我们使用的是SPI1，ICP20100的CS引脚连接到了GPIOB的PIN4。