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I need help with AVR RAM check.

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ltg

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Hi,

I need help with AVR RAM check. Do you have algorithm/methode/link in C routine? How should I treat data when I do RAM check? Would they be destroyed? Thank you for your help!

Best Regards,
ltg
 

ltg said:
I need help with AVR RAM check. Do you have algorithm/methode/link in C routine? How should I treat data when I do RAM check? Would they be destroyed?
ltg
Click to expand...

The simplest check algorithm is as follows:

1) Save the local byte
2) Put the 0x55
3) Read and check it
4) Put the 0xAA
5) Read and check it
6) Restore the local byte

You can see the data in the memory cell is restored. Do it for for all memory cells.

Next you can implement the gallope 0 and 1 and so on...like it
was in past when RAMs were not such reliable as now.

But I wonder why on the earth do you need to check the RAM?

Regards,
George
 

or test it with the moving bit technic :

1. save local data
2. for (i=0;i<7;i++) {
3. write i<<i to RAM
4. read data and compare
5. loop to step2
 

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