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发表于 2010-7-15 09:36:46
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回复【3楼】tear086 .COM 缺氧
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hardware debug 的时候出现error,如下:
>Using cable "USB-Blaster [USB-0]", device 1, instance 0x00
>Pausing target processor: OK
>Reading System ID at address 0x00401000: verified
>Initializing CPU cache (if present)
>OK
>Downloading 01000020 ( 0%)
>Downloaded 55KB in 0.9s (61.1KB/s)
>Verifying 01000020 ( 0%)
>Verify failed between address 0x1000020 and 0x100D943
>Leaving target processor paused
>
address 0x1000020 and 0x100D943 这段地址在SDRAM段(根据system.h)
google,baidu了一些,问题主要在:
硬件:
管脚配置 不对,硬件焊接问题,dram 本身有问题
软件:
主要在时序(pll配置)
软件上我改了几种时序,都不行,手边只有万用表,正在想办法怎么测试,调整呢?
有遇到此类问题的吗? |
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