topic Re: Help lcp1769 ISP + bootloader!!! in LPCXpresso IDE

Help lcp1769 ISP + bootloader!!!

lpcware — Wed, 15 Jun 2016 23:16:42 GMT

Content originally posted in LPCWare by MAUROFIUNER on Fri Nov 15 19:13:22 MST 2013
Hi,
I'm using lcp1769, and I have P2.10 pin attached to the sd card so when power on, P2.10 go low and ISP mode start!.. i need to write a dummy soft that return to the main, how do i do that?

Tanks a lot!
Mauro

Re: Help lcp1769 ISP + bootloader!!!

lpcware — Wed, 15 Jun 2016 23:16:43 GMT

Content originally posted in LPCWare by MikeSimmonds on Fri Nov 15 19:44:56 MST 2013
There are many many topics already about this -- that is what the search is for!!! (to use your punctuation style).

Basically, you MUST add a pull up resistior on this pin to avoid entering ISP mode at power on.
Once ISP mode is active, you have no control exept via seria comms.

Regards.

Re: Help lcp1769 ISP + bootloader!!!

lpcware — Wed, 15 Jun 2016 23:16:43 GMT

Content originally posted in LPCWare by MAUROFIUNER on Fri Nov 15 21:38:23 MST 2013
Hi Mike, Tank you for your reply! I thougth you could use any function or pice of code to set, as an example the RTC (date), or another issue... but if I can't do that, i'd better change the pin P2.10 to detect the sd card!

Tanks a lot!
mauro

Re: Help lcp1769 ISP + bootloader!!!

lpcware — Wed, 15 Jun 2016 23:16:44 GMT

Content originally posted in LPCWare by mc on Sat Nov 16 11:19:00 MST 2013
Hi MAUROFIUNER,
As Mike mentioned boot ROM samples ISP pin at power on. Once BootROM detects this pin low, LPC1769 execute ISP mode(ROM code). Therefore LPC1769 is not executing user code. At that time LPC1769 takes command from UART0 serial port only. Please check LPC17xx User manual paragraph 2, section 32.3, page 615/840 UM10360 Rev. 2 — 19 August 2010 details about ISP pin condition.

Hope it is helpful.
MC

Re: Help lcp1769 ISP + bootloader!!!

lpcware — Wed, 15 Jun 2016 23:16:44 GMT

Content originally posted in LPCWare by MAUROFIUNER on Sun Nov 17 13:11:50 MST 2013
Hi MC,
I've read the paragraph and it was very helpful!

thank you very much!

Mauro