即使一小步也有新高度!
就像当年学单片机一样,怀着无比崇拜和好奇的心情搞ARM9,大体看了下ARM9的架构,和ARM7基本是一样的,唯一不同的是他的boot是要单独烧写的,就是PC机的bios一样,忙碌了一下午,听着歌,研究怎么烧写,主要是刚开始路子没选对,走了弯路,其实直接用jtag就行,直接烧写,很简单的,我烧的步骤如下:
第一歩: 加载预先编译的启动文件,
第二部选择FLASH:norflash,或者NAND flash,
第三部:烧写
烧写完毕之后,提示你成功,然后你重新上电,串口就打印如下:成功了!
*** Warning - bad CRC or NAND, using default environment
##### EmbedSky BIOS for SKY2440/TQ2440 #####
Press Space key to Download Mode !
##### Boot for Nor Flash Main Menu #####
##### EmbedSky USB download mode #####
[1] Download u-boot or STEPLDR.nb1 or other bootloader to Nand Flash
[2] Download Eboot (eboot.nb0) to Nand Flash
[3] Download Linux Kernel (zImage.bin) to Nand Flash
[5] Download CRAMFS image to Nand Flash
[6] Download YAFFS image (root.bin) to
Nand Flash
[7] Download Program (uCOS-II or TQ2440_Test) to SDRAM and Run it
[8] Boot the system
[9] Format the Nand Flash
[0] Set the boot parameters
[a] Download User Program (eg: uCOS-II or TQ2440_Test)
Download LOGO Picture (.bin) to Nand Flash
[l] Set LCD Parameters
[n] Enter TFTP download mode menu
[o] Download u-boot to Nor Flash
[r] Reboot u-boot
[t] Test Linux Image (zImage)
[q] quit from menu
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