jflash添加芯片_利用J-Link烧写SPI串行Flash存储器方法
J-Flash SPI是个单独的软件，如果你找不到，可能要升级到相对高一点的版本。我这是5.02的。项目采用默认的就行。
图1. 软件界面
打开要写入存储器的数据文件。File->Open data file (+O)
图2. 我的路由器是WR703N，4M改16M Flash
图3. 起始地址不用改
图4. 数据已备好
试着连接SPI存储器，软件会采用标准的读Flash ID过程尝试识别芯片型号。读到的三字节ID为： 0xEF 40 18(0xEF是华邦的Manufacturer ID，0x4018是W25Q128FV的Device ID)。J-Flash SPI支持的芯片列表：https://www.segger.com/jlink_supported_devices.html#SupportedSPIFlashes
图5. 除了正确识别出芯片外，软件还列出该芯片的各操作命令代码
自动烧写就好。Target->Auto()
图6. 先回读
图7. 烧写
图8. 完成
截图稍微简化了过程。
软件的Auto自动操作步骤从读取存储器原始内容开始，与准备烧写的内容进行比较，如果数据完全相同则直接结束。如果要烧写的区块原片为已擦除或者原片为空片则进入烧写过程，否则要对需要的区块进行擦除操作。烧写后再次读回校验，数据完全一致则烧写成功。
一次完整的烧写过程可能有以下提示：
Connecting ... - Connecting via USB to J-Link device 0
- VTarget = 4.258V - Read SPI Flash Id = 0xEF 40 18 00 00 00 00 00 00 00 00 00 00 00 00 00
- Found SPI Flash: Winbond W25Q128FVSIG - Connected successfully
Disconnecting ... - Disconnected
Auto programming target (16777216 bytes, 1 range) ... - Connecting ...
- Connected successfully - Reading affected sectors ...
- Target memory read successfully. (16777216 bytes, 1 range) - Erasing affected sectors ...
- Erase operation completed successfully - Programming target (0 bytes, 0 ranges) ...
- Target programmed successfully - Verifying target (0 bytes, 0 ranges) ...
- All loaded bytes verified OK! - Target erased, programmed and verified successfully - Completed after 158.982 sec
Erasing chip ... - Erasing 256 sectors, 1 range, 0x0 - 0xFFFFFF
- Erase operation completed successfully - Completed after 55.154 secAuto programming target (16777216 bytes, 1 range) ...
- Reading affected sectors ... - Target memory read successfully. (16777216 bytes, 1 range)
- Erasing affected sectors ... - Erase operation completed successfully
- Programming target (3803392 bytes, 8 ranges) ... - Target programmed successfully
- Verifying target (3803392 bytes, 8 ranges) ... - All loaded bytes verified OK!
- Target erased, programmed and verified successfully - Completed after 138.177 sec
利用J-Link烧写SPI串行Flash存储器(后续)
http://bbs.mydigit.cn/read.php?tid=2056681