LPC4357 CRP加密设置

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LPC4357 CRP加密设置

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skysky
Contributor III

想用LPC4357的CRP2级加密,在启动代码.s文件中使能了这段代码

QQ截图20170823160552.png

但是,在生成的.bin文件中,在0x02FC处,并没有发现此处值被设置成0x87654321

而且,并不是生成单一的bin文件,而是分成了两个文件

QQ截图20170823160820.png

QQ截图20170823160833.png

想要实现CRP保护,要怎么操作呢?

4 Replies

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jeremyzhou
NXP Employee
NXP Employee

Hi sky sky,

Thank you for your interest in NXP Semiconductor products and 
for the opportunity to serve you.
Please referring the application note: Code Read Protection in LPC1800 and LPC4300.
Have a great day,

TIC

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2,494 Views
skysky
Contributor III

hi jeremy:

谢谢你的回复,今早想了一下发现是|.ARM.__at_0x1A0002FC|这个标号地址问题,自己改了下就成功了。

另外一个问题是,看文档上说:

Program the CRP pattern at address 0x1A00 02FC for flash bank A and at 0x1B00 02FC for flash bank B.

这句是什么意思呢?

是说在BANK-B上写入CRP值也是可以的?

还是可以两个BANK进行分别的保护?

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jeremyzhou
NXP Employee
NXP Employee

Hi sky sky,

你可以这么理解,因为LPC4357有两个Flash bank, bank A 和bank B,当任意的bank作为启动bank,即工程存放的bank,在便宜0x00 02FC处都可以设置CRP,而且是对于整个Flash bank有效。
Have a great day,
TIC

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Note: If this post answers your question, please click the Correct Answer button. Thank you!
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2,494 Views
skysky
Contributor III

hi jeremy:

  明白了,谢谢你的回复

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