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2005-04-18 by Jaromir
Hello, I cant find any information about protecting software on lpc21xx. I use lpc21isp or sometimes Philips Flash Utility. Jaromir _________________________________________________________________ List sprawdzony skanerem poczty mks_vir ( http://www.mks.com.pl ) [Non-text portions of this message have been removed]
2005-04-18 by 42Bastian Schick
> I cant find any information about protecting software on lpc21xx. AFAIK there is no way to disable JTAG permantly. You can make hackers-life only a bit more complicate by disabling JTAG upon boot. BTW: Please make a new email instead of replying and changing subject as this will screw up threaded views. Thanks. -- 42Bastian Schick
2005-04-18 by Jaromir
But how can I disable reading by bootloader (rs232 on uart0)? -- Jaromir _________________________________________________________________ List sprawdzony skanerem poczty mks_vir ( http://www.mks.com.pl ) [Non-text portions of this message have been removed]
2005-04-18 by 42Bastian Schick
Jaromir <jaromir.kajdaniak@...> schrieb am Mon, 18 Apr 2005 10:28:36 +0200: > > But how can I disable reading by bootloader (rs232 on uart0)? You may replace the boot-loader with your own one is one idea that comes to mind. -- 42Bastian Schick
2005-04-18 by lpcarmed
Code protect is available on the LPC211x and higher, using bootloader version 1.61 or higher. Take a look at message 2619. The first generation 48 pin devices are not protected. One code protect is in, it kills the JTAG and the read/execute function of the boot loader. --- In lpc2000@yahoogroups.com, "Jaromir" <jaromir.kajdaniak@z...> wrote:
> Hello, > > I cant find any information about protecting software on lpc21xx. > I use lpc21isp or sometimes Philips Flash Utility. > > Jaromir > _________________________________________________________________ > List sprawdzony skanerem poczty mks_vir ( http://www.mks.com.pl ) > > > [Non-text portions of this message have been removed]
2005-04-18 by Robert Adsett
At 08:52 AM 4/18/05 +0200, Jaromir wrote: >I cant find any information about protecting software on lpc21xx. >I use lpc21isp or sometimes Philips Flash Utility. Check the users manual. There is a flash location (just above the exception vectors) that can have a specific value written to it to provide read protection. AFAIK it disables JTAG as well but you would have to check that. It is not, however, available on the 2104, 2105 or 2106. Robert " 'Freedom' has no meaning of itself. There are always restrictions, be they legal, genetic, or physical. If you don't believe me, try to chew a radio signal. " -- Kelvin Throop, III http://www.aeolusdevelopment.com/
2005-04-18 by Robert Adsett
At 11:14 AM 4/18/05 +0200, 42Bastian Schick wrote: >Jaromir <jaromir.kajdaniak@...> schrieb am Mon, 18 Apr 2005 >10:28:36 +0200: > > But how can I disable reading by bootloader (rs232 on uart0)? > >You may replace the boot-loader with your own one is one idea that comes >to mind. I haven't heard of anyone doing that. Wouldn't it be far simpler just to enable the protection built-in (unless of course you are using a 2104/5/6)? Robert " 'Freedom' has no meaning of itself. There are always restrictions, be they legal, genetic, or physical. If you don't believe me, try to chew a radio signal. " -- Kelvin Throop, III http://www.aeolusdevelopment.com/
2005-04-18 by 42Bastian Schick
> Code protect is available on the LPC211x and higher, using bootloader > version 1.61 or higher. Take a look at message 2619. The first > generation 48 pin devices are not protected. One code protect is in, > it kills the JTAG and the read/execute function of the boot loader. I have a LPC2294 here, which "kill" JTAG, but i can break on reset and then can read the flash. Ah, maybe, I just think I stop on 0, but actually stop there the second time because my flash does not contain a magic ?! -- 42Bastian Schick