RT-Thread To configure SPI-Flash(W25Q256)

1. Turn on SPI Bus

Create a new blank RT-Thread project , This article is based on STM32F103 chip .
First, in the drivers Open in directory board.h file , find SPI The corresponding part . According to the instructions , Step by step .

1.1 open SPI And SFUD

open RT-Thread Settings, Click more configurations to go to the component column , Check below .

1.2 open SPI Macro definition

board.h In file , open SPI Macro definition .

1.3 Generate initialization function

Use stm32cubemx Generate initialization function , Paste it on board.c end of file .

Then choose the chip model -> Fill in the project name , double-click IOC After the file, operate as shown in the figure .

Copy the initialization function to board.c file .

1.4 open SPI drive

stay drivers In the catalog stm32f1xx_hal_conf.h Open... In file SPI drive .

Configuration complete , Compile and download , Use list_device Command view device , You can see SPI The bus already exists .

2. Outside the mount flash

Next , We're going to take off the film flash(W25Q256) Hang up SPI On the bus .

stay application Under the table of contents , newly added flash.c file .

static int rt_hw_spi_flash_init(void)
{
    
    // Here is the chip selection pin 
    rt_hw_spi_device_attach(W25Q_SPI_BUS_NAME, W25Q_SPI_DEVICE_NAME, GPIOA, GPIO_PIN_4);
    
    //flash The name should be correct 
    if (RT_NULL == rt_sfud_flash_probe("W25Q256", W25Q_SPI_DEVICE_NAME))
    {
    
        return -RT_ERROR;
    };

    return RT_EOK;
}

/*  Export to automatic initialization  */
INIT_COMPONENT_EXPORT(rt_hw_spi_flash_init);

After verification ,flash Successfully mounted .

Let's start building FAL.

3. build FAL Abstraction layer

FAL yes RT-Thread A software package for , Mainly for Flash The implementation of the abstraction layer , Responsible for managing the Flash Equipment and Flash Partition . About FAL Detailed features of , You can refer to RT-Thread Package Links . The documentation is very detailed , Reference is also made here to the contents of the document .

3.1 add to FAL

open RT-Thread Settings Click Add now , And then the search FAL.

3.2 To configure FAL

Because we only use off film flash, So you can fal_cfg.h About off film flash Delete the part of , And define your own partition table .

take samples->porting->fal_cfg.h Copied to the inc And modify it to :

#ifndef _FAL_CFG_H_
#define _FAL_CFG_H_

#include <rtconfig.h>
#include <board.h>

#define NOR_FLASH_DEV_NAME "W25Q256" /* Make sure it's your own flash name */

/* ===================== Flash device Configuration ========================= */
extern struct fal_flash_dev nor_flash0;

/* flash device table( Define device table , Deleted the film flash) */
#define FAL_FLASH_DEV_TABLE \ {
       \ &nor_flash0, \ }
/* ====================== Partition Configuration ========================== */
#ifdef FAL_PART_HAS_TABLE_CFG
/* partition table ps： It can be partitioned as needed */ 
#define FAL_PART_TABLE \ {
       \ {
      FAL_PART_MAGIC_WORD, "easyflash", NOR_FLASH_DEV_NAME, 0, 1024*1024, 0}, \ {
      FAL_PART_MAGIC_WORD, "download", NOR_FLASH_DEV_NAME, 1024*1024, 1024*1024, 0}, \ }
#endif /* FAL_PART_HAS_TABLE_CFG */

#endif /* _FAL_CFG_H_ */

Not much has been changed here for the time being , You can partition according to your needs 、 name .

3.3 initialization FAL

stay main.c In file , contain fal.h And call fal_init() Initializer .

3.4 verification