macros.inc

das filter: baswed on research by das in filtering

;*****************************************************************
;*	file: macros.inc
;*
;*	Description:
;*	Source file for application note AVR001 - Conditional Assembly
;*	and Portability Macros.
;*
;*	Defines a number of macros that makes it easier to access
;*	IO registers and extended IO registers (or SRAM locations up
;*  to adress $FF if applicable).
;*	The macros can be used to produce code that assembles to
;*	any target AVR, without considering if the accessed IO
;*	registers are located in low, standard or extended IO space
;*
;* $Revision: 2.2 $	
;* $Author: jllassen $
;* $Date: Wednesday, January 26, 2005 10:55:18 UTC $
;*****************************************************************

;*********************************************************
;*	BIT access anywhere in IO or lower $FF of data space
;*	SETB - SET Bit in IO of data space
;*	CLRB - CLeaR Bit in IO of data space
;*********************************************************

.MACRO SETB 		;Arguments: Address, Bit, Register
	.if @1>7
		.message "Only values 0-7 allowed for Bit parameter"
	.endif
	.if @0>0x3F
		lds  @2, @0
		sbr  @2, (1<<@1)
		sts  @0, @2
	.elif @0>0x1F
		in   @2, @0
		sbr  @2, (1<<@1)
		out  @0, @2
	.else
		sbi  @0, @1
	.endif
.ENDMACRO

.MACRO CLRB 		;Arguments: Address, Bit, Register
	.if @1>7
		.message "Only values 0-7 allowed for Bit parameter"
	.endif
	.if @0>0x3F
		lds  @2, @0
		cbr  @2, (1<<@1)
		sts  @0, @2
	.elif @0>0x1F
		in   @2, @0
		cbr  @2, (1<<@1)
		out  @0, @2
	.else
		cbi  @0, @1
	.endif
.ENDMACRO

;*********************************************************
;*	Bit test anywhere in IO or in lower $FF of data space
;*  SKBS : SKip if Bit Set
;*  SKBC : SKip if Bit Cleared
;*********************************************************
.MACRO SKBS  		;Arguments: Address, Bit, Register
	.if @1>7
		.message "Only values 0-7 allowed for Bit parameter"
	.endif
	.if @0>0x3F
		lds  @2, @0
		sbrs @2, @1
	.elif @0>0x1F
		in   @2, @0
		sbrs @2, @1
	.else
		sbis @0, @1
	.endif
.ENDMACRO

.MACRO SKBC  		;Arguments: Address, Bit, Register
	.if @1>7
		.message "Only values 0-7 allowed for Bit parameter"
	.endif
	.if @0>0x3F
		lds	 @2, @0
		sbrc @2, @1
	.elif @0>0x1F
		in	 @2, @0
		sbrc @2, @1
	.else
		sbic @0, @1
	.endif
.ENDMACRO

;*********************************************************
;*	Byte access anywhere in IO or lower $FF of data space
;* 	STORE - Store register in IO or data space
;* 	LOAD  - Load register from IO or data space
;*********************************************************

.MACRO STORE 		;Arguments: Address, Register
	.if	@0>0x3F
		sts	@0, @1
	.else
		out	@0, @1
	.endif
.ENDMACRO

.MACRO LOAD 		;Arguments: Register, Address
	.if	@1>0x3F
		lds	@0, @1
	.else
		in	@0, @1
	.endif
.ENDMACRO