1 硬件电路
2 RT-Thread配置
RT-Thread内置FAL（flash抽象层），支持MCU内置Flash和SPI Flash,使用SFUD（串行 Flash 通用驱动库）。
JEDEC SFDP标准可以自动探测芯片的参数，目前市场上的SPI Flash芯片一般都支持。如果不支持的话，可以通过查表的方式进行配置。
FAL配置
SPI和SFUD配置
3 软件编写
在drivers目录下添加
分区配置文件fal_cfg.h
#ifndef _FAL_CFG_H_
#define _FAL_CFG_H_
#include <rtthread.h>
#include <board.h>
#include "drv_flash.h"
#include "fal.h"
#ifdef __cplusplus
extern "C" {
#endif
extern const struct fal_flash_dev at32_onchip_flash;
extern struct fal_flash_dev nor_flash0;
/* flash device table */
#ifdef FAL_USING_NOR_FLASH_DEV_NAME
#define FAL_FLASH_DEV_TABLE \
{ \
&at32_onchip_flash, \
&nor_flash0, \
}
#else
#define FAL_FLASH_DEV_TABLE \
{ \
&at32_onchip_flash, \
}
#endif
/* ====================== Partition Configuration ========================== */
#ifdef FAL_PART_HAS_TABLE_CFG
#ifdef BSP_USING_AT_SPIM
/* partition table */
#define FAL_PART_TABLE \
{ \
{FAL_PART_MAGIC_WROD, "param", "onchip_flash", 0, 128 * 1024, 0}, \
{FAL_PART_MAGIC_WROD, "log", "onchip_flash", 128 * 1024, SPIM_FLASH_SIZE_MB * 1024 * 1024, 0}, \
}
#else
/* partition table */
#define FAL_PART_TABLE \
{ \
{FAL_PART_MAGIC_WROD, "app", "onchip_flash", 0, 250 * 1024, 0}, \
{FAL_PART_MAGIC_WROD, "param", "onchip_flash", 250 * 1024, 6 * 1024, 0}, \
{FAL_PART_MAGIC_WORD, "flashdb", FAL_USING_NOR_FLASH_DEV_NAME, 0, 512 * 1024, 0}, \
{FAL_PART_MAGIC_WORD, "download", FAL_USING_NOR_FLASH_DEV_NAME, 512 * 1024, 512 * 1024, 0}, \
}
#endif
#endif /* FAL_PART_HAS_TABLE_CFG */
#ifdef __cplusplus
extern "C" {
#endif
#endif /* _FAL_CFG_H_ */
SPI/SFUD和FAL初始化 component_init.c
#include <rtthread.h>
#include <rtdbg.h>
/******************************************************************************
SPI_FLASH
*/
#ifdef BSP_USING_SPI_FLASH
#include "spi_flash.h"
#include "spi_flash_sfud.h"
#include "drv_spi.h"
static int rt_hw_spi_flash_init(void)
{
rt_hw_spi_device_attach(SPI_FLASH_BUS_NAME, SPI_FLASH_DEVICE_NAME, GPIOB, GPIO_PINS_12); // CS 脚：PB12
/* 使用 SFUD 探测 spix 从设备，并将 spix0 连接的 flash 初始化为块设备，名称 */
if (RT_NULL == rt_sfud_flash_probe(FAL_USING_NOR_FLASH_DEV_NAME, SPI_FLASH_DEVICE_NAME))
{
LOG_E("find sfud_flash failed!...\n");
return -RT_ERROR;
}
return RT_EOK;
}
INIT_COMPONENT_EXPORT(rt_hw_spi_flash_init);
#endif
#ifdef RT_USING_FAL
#include "fal.h"
static int rt_hw_onchip_flash_init(void)
{
#ifdef BSP_USING_AT_SPIM
at32_msp_spim_init();
#endif
return fal_init();
}
INIT_COMPONENT_EXPORT(rt_hw_onchip_flash_init);
#endif
4 测试结果
fal bench测试结果
msh >fal probe flashdb
Probed a flash partition | flashdb | flash_dev: norflash0 | offset: 0 | len: 524288 |.
msh >fal bench
Usage: fal bench <blk_size> - benchmark test with per block size.
msh >fal bench 1024
DANGER: It will erase full chip or partition! Please run 'fal bench 1024 yes'.
msh >fal bench 1024 yes
Erasing 524288 bytes data, waiting...
Erase benchmark success, total time: 0.665S.
Writing 524288 bytes data, waiting...
Write benchmark success, total time: 2.048S.
Reading 524288 bytes data, waiting...
Read benchmark success, total time: 0.730S.
————————————————
版权声明：本文为CSDN博主「lg28870983」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/lg28870983/article/details/135393930
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