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README
Apache-2.0

flash_blob

1、介绍

利用MDK的FLM文件快速生成通用flash驱动。

  • 同时支持多个flash芯片级联,根据地址自动选择flash驱动。
  • 可以作为直接操作 片内 FlashSPI Flash 的后端实现。

1.1、API接口

extern bool target_flash_init(uint32_t flash_start, int32_t size);
extern bool target_flash_uninit(uint32_t flash_start);
extern int32_t target_flash_write(uint32_t addr, const uint8_t *buf, int32_t size);
extern int32_t target_flash_erase(uint32_t addr, int32_t size);
extern int32_t target_flash_read(uint32_t addr, const uint8_t *buf, int32_t size);

1.2、目录结构

doc 文档
src 源代码
inc 头文件
tools 驱动生成工具

1.3、许可证

Agile Upgrade 遵循 Apache-2.0 许可,详见 LICENSE 文件。

2、使用 flash_blob

  1. 在rtthread软件包中找到flash_blob,然后添加进工程。

  2. 通过tools文件下的工具,生成对应的xxx.FLM.c文件,将xxx.FLM.c添加进工程,如果有多个flash器件,可以连续添加。

注意:多个设备的话每个flash的FlashDevice 的设备起始地址不可重叠,flash抽象层根据地址,自动选择相应的驱动。

  1. 由于flash驱动需要占用“r9”寄存器,所以需要在编译选项中添加-ffixed-r9

在这里插入图片描述

以上步骤完成后,就可以快速使用了,例如将YMODEM接收到的数据,写到flash中,代码如下:

uint8_t *ymodem_call_back_receive(uint8_t *pchBuffer, uint16_t hwSize)
{
    static char *s_pchFileName = NULL, *s_pchFileSize = NULL;
    static uint32_t s_wFileSize = 0, s_wRemainLen = 0, s_wOffSet = 0;

    static enum  {
        START = 0,
        RECEIVE,
        END,
    } s_tState = {START};

    switch(s_tState) {
        case START:
            s_wOffSet = 0;
            s_pchFileName = (char *)&pchBuffer[0];
            s_pchFileSize = (char *)&pchBuffer[strlen(s_pchFileName) + 1];
            s_wFileSize = atol(s_pchFileSize);

            LOG_D("Ymodem file_name:%s", s_pchFileName);
            LOG_D("Ymodem file_size:%d", s_wFileSize);

			if(target_flash_init(APP_PART_ADDR, s_wFileSize) == false) {
				LOG_E("target flash uninit.");
				return NULL;
			}

			if(target_flash_erase(APP_PART_ADDR, s_wFileSize) < 0) {
				LOG_E("target flash erase error.");
				return NULL;
			}            

            s_tState = RECEIVE;
            break;

        case RECEIVE:
            s_wRemainLen = s_wFileSize - s_wOffSet;

            if(hwSize > s_wRemainLen) {
                hwSize = s_wRemainLen;
                s_tState = END;
            }

			if(target_flash_write(APP_PART_ADDR + s_wOffSet, pchBuffer, hwSize) < 0) {
				LOG_E("target flash write data error.");
				return NULL;
			}
			s_wOffSet += hwSize;
            
            break;

        case END:
            target_flash_uninit(APP_PART_ADDR);                        
            s_tState = START;
            break;
    }

    return s_chBuffer;
}
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简介

一个适配几乎任意单片机型号的flash驱动 展开 收起
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