Content originally posted in LPCWare by MarcVonWindscooting on Mon Jul 29 16:37:56 MST 2013 Hi,
I've nearly finished my own (Linux-only) command-line ISP programming tool. Only very remotely similar to lpc21isp. Available on www.windscooting.com/softy/software.html, at the bottom: isp-2.0
While writing/testing I noticed the following: If (on a LPC812M101FD20, rev 2A) blank checking sector 0 I get 0 (CMD_SUCCESS) if sector 0 is blank in CRP0 mode. Believe me, I'm really fine with that! :bigsmile: Unfortunately, this is in contradiction to what the manual says (in boldface): Blank check on sector 0 always fails as first 64 bytes are re-mapped to flash boot block. When reading data, I indeed get the re-mapped contents. CRC checksum is still missing from my program, but I expect (sadly) to get the CRC of the re-mapped content's checksum, not the FLASH contents.
Also, my overall judgement about the ISP chapter is: it's lacking depth! Writing an ISP programmer is more like getting the basic command from the manual, send it over to a real device and look what comes out of it. Don't get me wrong, I do appreciate that information, I got my program running. But the goal should be to write it according to specification, not observation on one specific, sample device.
In that context, I'd like to ask: is it intended, that after a read - after removing the echo (if enabled), I always get a '\n' and only then the binary data? This happens with and without echoing (A 1 / A 0 ).
And, by the way, may I get a Revision '4C' device sample for that feat of mine?? 0:)
Content originally posted in LPCWare by nxp_apps on Thu Sep 19 13:59:21 MST 2013 Regarding the blank check on sector comment in the UM......this is a typo, and blank check on sector 0 will return 0. We will correct this. Thanks for pointing this out.
All ISP responses from device are sent as <CR><LF> terminated ASCII strings.
