Wakeup on pin change.. how?!

[Curt]

I see many references to "when configured" about waking up on a pin change, but cannot find how to configure it.

I see this #define in my 16c505.h "example"-

#define PIN_CHANGE_FROM_SLEEP 0x90

Which seems promising, but is not mentioned anywhere in the documentation.

help?

-Curt
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This message was ported from CCS's old forum
Original Post ID: 14121

[Curt]

finnaly found the appropriate bit in the status register (/RBWU) and am attemptin to manually set this to '0' but how is it "supposed" to be done with the compiler? Docs are quite sketchy.

-Curt
___________________________
This message was ported from CCS's old forum
Original Post ID: 14122

[PCM programmer]

:=finnaly found the appropriate bit in the status register (/RBWU) and am attemptin to manually set this to '0' but how is it "supposed" to be done with the compiler? Docs are quite sketchy.
---------------------------------------------------------

The RBWU bit is in the Option register. CCS has a macro
in the EX_MACRO.C file that can be used to write to that
register. EX_MACRO.C is in c:\Program Files\Picc\Examples

Here's the macro:

<PRE>
#define set_options(value) {#ASM \
MOVLW value \
OPTION \
#ENDASM}
</PRE>

Because the Option register is Write-only, you also have
to specify the other bits properly, when you write to it.
ie., RBPU, TOCS, etc. These are discussed in the 16c505
data sheet in section 4.4.
___________________________
This message was ported from CCS's old forum
Original Post ID: 14123

[Curt]

This code works-

-------------

// perform setup of environment
set_tris_b( 0x1A ); // 11010
set_tris_c( 0x0F ); // 1111

// enable wakeup-on-pin-change
#asm
movlw 0x18
option
#endasm

output_low( FET0 );

g_bTriggerState = input( TRIGGER ); // read trigger

if ( !input(L_RESET_SW) ) // its depressed, wait for it to come back up
sleep();

// okay it was released, determine power state
if ( g_onOff && !g_bTriggerState ) // was on, turn off
{
g_onOff = false;
output_low( LED );

sleep();
}
else // was off, turn on
{
g_onOff = true;
output_high( LED );
}
___________________________
This message was ported from CCS's old forum
Original Post ID: 14124

[Curt]

I guess my solution was the un-macroed version I appreciate your quick feedback.

-Curt
___________________________
This message was ported from CCS's old forum
Original Post ID: 14126