[Zhongyi Xinsheng] 5 SPI interface test TF Card

1 Preface

Tests in this chapter spi tf Card example , Realization txt Reading and writing of documents .

2 Source code

Source path ：
https://gitee.com/CMIOT-XinShengTech/CMIOT.CM32M4xxR_Library/tree/main/Projects/CM32M4xxR_LQFP128_STB/Examples/SPI/SPI_SD_CARD

Pay attention to the , It's used here CM32M4xxR_LQFP128_STB, The development board is CM32M433R-START, Compare the two codes , Little difference , among uart Serial printing log Use different ports ,START It's using uart4, and LQFP128_STB yes uart5.
If you are creating a project using CM32M433R-START, This serial port difference can be ignored . If you use CM32M4xxR_LQFP128_STB, It needs to use uart5, The corresponding mouth is pin8、9.
See https://gitee.com/CMIOT-XinShengTech/CMIOT.CM32M4xxR_Library/blob/main/Projects/CM32M4xxR_LQFP128_STB/BSP/Include/log.h.

Use CM32M4xxR_LQFP128_STB You can select when creating spi Related examples , And then sdcard Of main Copy the contents of the file .

In addition, we need to copy FatFs_User and FatFs Folder to Application Under the same category .

3 Add header file

Add the header file according to the above figure , You can compile , Otherwise it will be reported h The file could not be found .

4 Hardware

spi sdcard The example USES spi1.
Be careful not to connect the wires incorrectly , If the connection is wrong f_open Will return an error status , Such as return 3 It is The physical drive cannot work.
See ff.h Medium FRESULT.

5 Code

The code is spi sdcard Example , Only two return values are added for error analysis .

main.c

#include <main.h>
#include <stdio.h>
#include "log.h"
#include "fatfs.h"
#include "user_diskio.h" /* defines USER_Driver as external */

/** @addtogroup CM32M4xxR_StdPeriph_Examples * @{ */


/** @addtogroup SPI_CRC * @{ */


#define BufferSize (32)
#define SPICRC

volatile SPI_InitType SPI_InitStructure;
void RCC_Configuration(void);
void GPIO_Configuration(void);

volatile FATFS fs;
volatile FATFS *pfs;
volatile FIL fil;
volatile FRESULT fres;
volatile DWORD fre_clust;
volatile uint32_t totalSpace, freeSpace;
volatile char buffer[100];


volatile char USERPath[4];   /* USER logical drive path */


/** * @brief Main function. */
int main(void)
{
    
    /*!< At this stage the microcontroller clock setting is already configured, this is done through SystemInit() function which is called from startup file (startup_cm32m4xxr.s) before to branch to application main. To reconfigure the default setting of SystemInit() function, refer to system_cm32m4xxr.c file */
	log_init();
	log_info("This is a SPI_SD_CARD demo-----------------------------------\r\n");
	SysTick_Config(144000000/100);
    /* System clocks configuration ---------------------------------------------*/
    RCC_Configuration();

    /* GPIO configuration ------------------------------------------------------*/
    GPIO_Configuration();

    /* SPI1 configuration ------------------------------------------------------*/
    SPI_InitStructure.DataDirection = SPI_DIR_DOUBLELINE_FULLDUPLEX;
    SPI_InitStructure.SpiMode       = SPI_MODE_MASTER;
    SPI_InitStructure.DataLen       = SPI_DATA_SIZE_8BITS;
    SPI_InitStructure.CLKPOL        = SPI_CLKPOL_LOW;
    SPI_InitStructure.CLKPHA        = SPI_CLKPHA_FIRST_EDGE;
    SPI_InitStructure.NSS           = SPI_NSS_SOFT;
    SPI_InitStructure.BaudRatePres  = SPI_BR_PRESCALER_16;
    SPI_InitStructure.FirstBit      = SPI_FB_MSB;
    SPI_InitStructure.CRCPoly       = 0x0007;
    SPI_Init(SPI1, (SPI_InitType*)&SPI_InitStructure);

    /* Enable SPI1 */
    SPI_Enable(SPI1, ENABLE);

    uint8_t ret = 1;
    ret = FATFS_LinkDriver((Diskio_drvTypeDef*)&USER_Driver, (char*)USERPath);
    if(ret == 0)
    	printf("fatfs init ok\r\n");
    else
    	printf("fatfs init error\r\n");

    delay_ms(500);

    ret = f_mount((FATFS*)&fs, "", 0);
    printf("mount = %d\r\n",ret);
    if( ret != FR_OK)
    {
    
    	printf("error %s,line %d\r\n",__FILE__, __LINE__);
    }

    /* Open file to write */
    ret = f_open((FIL*)&fil, "first.txt", FA_OPEN_APPEND | FA_READ | FA_WRITE);
    printf("open = %d\r\n",ret);
    if(ret != FR_OK)
    {
    
    	printf("error %s,line %d\r\n",__FILE__, __LINE__);
    }

    /* Check freeSpace space */
   	if(f_getfree("", (DWORD*)&fre_clust, (FATFS **)&pfs) != FR_OK)
    {
    
    	printf("error %s,line %d\r\n",__FILE__, __LINE__);
    }

    totalSpace = (uint32_t)((pfs->n_fatent - 2) * pfs->csize * 0.5);
    freeSpace = (uint32_t)(fre_clust * pfs->csize * 0.5);

    /* free space is less than 1kb */
    if(freeSpace < 1)
    {
    
    	printf("error %s,line %d\r\n",__FILE__, __LINE__);
    }

    /* Writing text */
    f_puts("XinSheng Tech SD Card I/O Example via SPI\n", (FIL*)&fil);
    f_puts("test!!!\n", (FIL*)&fil);

    /* Close file */
    if(f_close((FIL*)&fil) != FR_OK)
    {
    
    	printf("error %s,line %d\r\n",__FILE__, __LINE__);
    }

    /* Open file to read */
    if(f_open((FIL*)&fil, "first.txt", FA_READ) != FR_OK)
    {
    
    	printf("error %s,line %d\r\n",__FILE__, __LINE__);
    }

    while(f_gets((char*)buffer, sizeof(buffer), (FIL*)&fil))
    {
    
    	/* SWV output */
    	printf("%s", buffer);
    	fflush(stdout);
    }

    /* Close file */
    if(f_close((FIL*)&fil) != FR_OK)
    {
    
    	printf("error %s,line %d\r\n",__FILE__, __LINE__);
    }

    /* Unmount SDCARD */
    if(f_mount(NULL, "", 1) != FR_OK)
    {
    
    	printf("error %s,line %d\r\n",__FILE__, __LINE__);
    }
    while (1)
    {
    
    }
}

/** * @brief Configures the different system clocks. */
void RCC_Configuration(void)
{
    
    /* Enable peripheral clocks --------------------------------------------------*/
    /* GPIOA, GPIOB and SPI1 clock enable */
    RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_GPIOA | RCC_APB2_PERIPH_GPIOB | RCC_APB2_PERIPH_SPI1, ENABLE);

    /* SPI2 Periph clock enable */
    RCC_EnableAPB1PeriphClk(RCC_APB1_PERIPH_SPI2, ENABLE);
}

/** * @brief Configures the different GPIO ports. */
void GPIO_Configuration(void)
{
    
    GPIO_InitType GPIO_InitStructure;

    /* Configure SPI1 pins: SCK, MISO and MOSI ---------------------------------*/
    /* Confugure SCK and MOSI pins as Alternate Function Push Pull */
    GPIO_InitStructure.Pin        = GPIO_PIN_5 | GPIO_PIN_7;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    /* Confugure MISO pin as Input Floating */
    GPIO_InitStructure.Pin       = GPIO_PIN_6;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    /* Confugure NSS pin as Output Push Pull */
    GPIO_InitStructure.Pin       = GPIO_PIN_4;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
}

6 result

from log Let's see if the file is read successfully , from sd Read from the card and confirm that the writing is successful .