CRC Calculation Limit

lpcware — Wed, 15 Jun 2016 20:06:40 GMT

Content originally posted in LPCWare by wanderingnewfie on Tue Oct 20 14:24:20 MST 2015
I am writing a 2nd bootloader for my LPC812 that jumps to an application after downloading through the UART. To confirm the download was successful, I want to compare the CRC at the end of the application with a CRC I calculate with Chip_CRC_CRC8() found in chip_8xx.c. When I try to calculate the value of my application I get into the while loop and never exit. The size of my application is 0x1BFC bytes (application is contained in 0x2400 to 0x4000 in flash and last 4 bytes is CRC). Am I just running out of RAM during the loop so the processor locks up? Is there a limit to the size of the bytes parameter in Chip_CRC_CRC8() for the LPC812 due to the amount of available RAM?

Thanks for the help.

Re: CRC Calculation Limit

lpcware — Wed, 15 Jun 2016 20:06:42 GMT

Content originally posted in LPCWare by wanderingnewfie on Wed Oct 21 16:17:56 MST 2015
I think I solved my problem, it was an unhandled systick interrupt that would fire during the CRC calculations. The default handler is just an infinite loop.

topic Re: CRC Calculation Limit in LPC Microcontrollers

CRC Calculation Limit

Re: CRC Calculation Limit