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| AT91SAM7A3 FLASH LOCK http://www.at91.com/samphpbb/viewtopic.php?f=15&t=19139 |
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| Author: | multis [ Fri Apr 09, 2010 2:57 pm ] |
| Post subject: | AT91SAM7A3 FLASH LOCK |
Dear All, can anyone help me, how to LOCK FLASH memory of AT91SAM7A3? Regards,David |
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| Author: | dfridley [ Fri Apr 09, 2010 5:11 pm ] |
| Post subject: | Re: AT91SAM7A3 FLASH LOCK |
You will have to write to the MC_FCR register for each page you want to lock (pages are 256bytes in size). See the data sheet. FYI: this only locks the page from subsequent writes it does not prevent reads. So, to lock page 0x0a you would load the MC_FCR with 0x5a000a02 Then you should wait until the the FRDY bit in the MC_FSR = 1 Finally you should check the status of the operation. This assumes that you have properly set up the Embedded Flash Controller (EFC) for use. |
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| Author: | multis [ Mon Apr 12, 2010 7:35 am ] |
| Post subject: | Re: AT91SAM7A3 FLASH LOCK |
Dear Dfridley, thanks for your reply. MC_FCR register not solve my problem. How can I protected Flash against reading? I would like to lock my program in flash, that no one could make a copy. Regards, David |
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| Author: | dfridley [ Mon Apr 12, 2010 1:45 pm ] |
| Post subject: | Re: AT91SAM7A3 FLASH LOCK |
To my knowledge, the AT91SAM devices do not have a way to securely lock them from reading. |
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