axi quad spi 测试程序

AXI Quad SPI测试程序需要通过读写SPI设备来验证其正常工作。下面是一个基本的测试程序，可以在Xilinx SDK中使用：

#include "xparameters.h"
#include "xspi.h"
#include "xil_printf.h"

#define SPI_DEVICE_ID	XPAR_AXI_QUAD_SPI_0_DEVICE_ID

#define TEST_DATA_SIZE	4

u8 TestData[TEST_DATA_SIZE] = {
	0x11, 0x22, 0x33, 0x44
};

u8 ReadBuffer[TEST_DATA_SIZE];

XSpi SpiInstance;
XSpi_Config *SpiConfig;

int main()
{
	int Status;
	XSpi *SpiPtr = &SpiInstance;

	SpiConfig = XSpi_LookupConfig(SPI_DEVICE_ID);
	if (SpiConfig == NULL) {
		xil_printf("Error: Could not find SPI device\n");
		return XST_FAILURE;
	}

	Status = XSpi_CfgInitialize(SpiPtr, SpiConfig, SpiConfig->BaseAddress);
	if (Status != XST_SUCCESS) {
		xil_printf("Error: Could not initialize SPI device\n");
		return XST_FAILURE;
	}

	Status = XSpi_SelfTest(SpiPtr);
	if (Status != XST_SUCCESS) {
		xil_printf("Error: SPI self test failed\n");
		return XST_FAILURE;
	}

	XSpi_SetOptions(SpiPtr, XSP_MASTER_OPTION | XSP_CLK_ACTIVE_LOW_OPTION | XSP_CLK_PHASE_1_OPTION);

	Status = XSpi_SetSlaveSelect(SpiPtr, 0x01);
	if (Status != XST_SUCCESS) {
		xil_printf("Error: Could not set slave select\n");
		return XST_FAILURE;
	}

	Status = XSpi_Transfer(SpiPtr, TestData, ReadBuffer, TEST_DATA_SIZE);
	if (Status != XST_SUCCESS) {
		xil_printf("Error: SPI transfer failed\n");
		return XST_FAILURE;
	}

	xil_printf("Read data: %02x %02x %02x %02x\n", ReadBuffer[0], ReadBuffer[1], ReadBuffer[2], ReadBuffer[3]);

	return XST_SUCCESS;
}

该程序使用XSpi驱动程序来配置AXI Quad SPI IP核并进行数据传输。在主函数中，首先初始化XSpi实例并进行自检。然后设置传输选项和从设备地址，并使用XSpi_Transfer函数进行数据传输。最后打印读取到的数据以供用户检查。

需要注意的是，在测试程序中使用的TestData和ReadBuffer数组大小为4字节，与SPI设备的数据宽度相对应。如果需要进行更大或更小的数据传输，需要相应地调整数组大小。另外，还需要根据实际情况调整SPI设备的时钟频率、传输模式等参数。