S3C2440 development board learning - openjtag download BootLoader

       First, place oflash.exe and FTD2XX.dll in the C:WindowsSystem32 folder so that Dos can execute the oflash command;

       Secondly, enter the folder where BootLoader is located in the DOS command, use cd+absolute path, and select the file path of uboot.bin;

       Then, execute the oflash command, select parameters such as eeprom, IC, address, download program (u-boot.bin), etc.

       Finally, start the program and download the program to the development board through the openjtag port.

       Note:

      1. Differences and similarities between NAND and NOR flash. Similarities: Both NOR flash and NAND flash are EEPROMs, which can be repeatedly erased and read and written. Differences: The address bus and data bus of NOR flash are separate, so NOR flash can read and write data flexibly. It is usually used to place startup programs such as BootLoader. The address and data buses of NAND flash are multiplexed, and reading and writing are performed in "blocks". Of course, the cost of NOR flash is also higher than that of NAND flash.

      2. During the installation of the openjtag driver, the following error message appears: "The hash value of the file is not in the specified directory file. This file may have been damaged or tampered with." The solution is: a. On the win10 desktop, use the win+x combination; b. Enter Update and Security + Recovery + Advanced Startup + Troubleshooting + Advanced Options + Startup Settings + Restart + 7 (disable driver mandatory signature); c. Reinstall the driver. Note: This solution will become invalid after the computer is restarted.

       3. In the case of a bare board, it is not possible to directly burn the boot file, kernel and file system into the development board. The openjtag emulator is needed to help burn u-boot into the NOR flash of the development board. ：https://blog.csdn.net/qq_37238696/article/details/79969738