LPC Microcontrollers中的主题 Re: Flash signature not same after reset

Flash signature not same after reset

lpcware — Wed, 15 Jun 2016 19:02:32 GMT

Content originally posted in LPCWare by tioui657 on Thu May 01 12:44:56 MST 2014
I use 128-bit flash signature generator for flash bank A applied on sector 4 to 14, address range 0x1A008000 - 0x1A07FFFF. I perform the signature generation after writing a single flash page at the address 0x1A008000, start of sector 4. If i reset the debugger and restart code without flash writen and try to perform same signature generation, the result is not the same for the same flash area and content?

If i use a software CRC32 to generate and validate the signature in the same reserved 128-bit area instead of hardware FMC controller, every things run properly witout failure...

Re: Flash signature not same after reset

lpcware — Wed, 15 Jun 2016 19:02:33 GMT

Content originally posted in LPCWare by xianghuiwang on Fri May 02 14:32:20 MST 2014
Hi,
Did you confirm your flash contents are really same in the two situations?
Might there be some operations modifying the same area as well?

regards,

Re: Flash signature not same after reset

lpcware — Wed, 15 Jun 2016 19:02:33 GMT

Content originally posted in LPCWare by tioui657 on Mon May 05 14:12:21 MST 2014
Hi,
Yes flash content is the same in two situation.!

Re: Flash signature not same after reset

lpcware — Wed, 15 Jun 2016 19:02:34 GMT

Content originally posted in LPCWare by TheFallGuy on Tue May 06 00:31:28 MST 2014
So you have a bug in your code then. Do you have uninitialised data?