topic Re: MC9S08PA4 warning in 8-bit Microcontrollers

MC9S08PA4 warning

mikee_ — Thu, 23 Apr 2015 15:44:19 GMT

Hello,

I am getting this strange warning every time I compile my code.

In my code I start by Initialization section when I configure the PORT registers as follows.

BCLR 0,PORT_PTAOE

; Output disabled

BSET 0,PORT_PTAIE

; Input Enabled

I am using Freescale Codewarrioe 10.6 and the compilor does not seem to like something about my code. I get the following warning for each line in my code where I try to configure a register.

The warning is the following: A13003 Value is truncated to one byte.

Any help?

Many thanks

Re: MC9S08PA4 warning

tonyp — Thu, 23 Apr 2015 22:23:39 GMT

Check the values for the PORT_PTAOE and PORT_PTAIE symbols.

If they are not in zero page (i.e., have an MSB of zero) then you cannot use the BSET/BCLR instructions. You will have to use a LDA/ORA/STA (BSET) or LDA/AND/STA (BCLR, using inverted mask) sequence instead.

Re: MC9S08PA4 warning

mikee_ — Fri, 24 Apr 2015 20:06:32 GMT

Thank you so much.

you were right !!