topic Put a function into the stack in 8-bit Microcontrollers

Put a function into the stack

Saga — Fri, 10 Nov 2006 23:11:33 GMT

Hi to all, i was wondering is there any way to put a function into the stack? This function (as you may guess) is for writing into the flash.

Thanks for your help!

Re: Put a function into the stack

Geezer — Fri, 10 Nov 2006 23:19:49 GMT

Putting a function on the stack is equivalent to placing it in RAM, so here's another way:
Define an array of RAM bytes, copy down the routine bytes from your ROM space, in C-code use an "__asm JSR xxxx" to that location.

Re: Put a function into the stack

Saga — Fri, 10 Nov 2006 23:34:09 GMT

Thank you geezer, i would like to know how can i know (from code) which is the size of the function i want to put into the RAM. Yes im using C language. Thank you!

Re: Put a function into the stack

tonyp — Fri, 10 Nov 2006 23:44:56 GMT

See the example code given in Fig. 4-12 of the HCS08 Family Reference Manual.

Re: Put a function into the stack

Saga — Sat, 11 Nov 2006 00:25:04 GMT

Is this reference manual supposed to be with codewarrior? or where can i find it...? Thank you

Re: Put a function into the stack

Geezer — Sat, 11 Nov 2006 02:13:02 GMT

HCS08RMV1.PDF

from Freescale:
http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MC9S08GT60&nodeId=016246844914370008

Re: Put a function into the stack

CompilerGuru — Sat, 11 Nov 2006 06:59:36 GMT

There are some technical notes on this topic.

TN 235: Running Portion of the Application from Stack
TN 228: Running Portion of the Application in RAM

Daniel

TN228.pdf

TN235.pdf

Message Edited by t.dowe on 2009-09-24 03:18 PM