db3f88f3af
- move IRQ control to main code (only the main code knows exactly which combination of pins is used for com2) - split one big module into multiple smaller files (easier to maintain)
91 lines
2.5 KiB
NASM
91 lines
2.5 KiB
NASM
; ***************************************************************************
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; copyright : (C) 2026 by Martin Preuss
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; email : martin@libchipcard.de
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;
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; ***************************************************************************
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; * This file is part of the project "AqHome". *
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; * Please see toplevel file COPYING of that project for license details. *
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; ***************************************************************************
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#ifndef AVR_MODULES_COM2W2_MACROS_H
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#define AVR_MODULES_COM2W2_MACROS_H
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.macro M_COM2WCLKSETLOW
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sbi COM_CLK_DDR, COM_CLK_PIN ; set CLK as output
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cbi COM_CLK_OUTPUT, COM_CLK_PIN ; set CLK low
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.endmacro
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.macro M_COM2WCLKSETHIGH
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cbi COM_CLK_DDR, COM_CLK_PIN ; set CLK as input
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.ifndef COM_CLK_PUE
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cbi COM_CLK_OUTPUT, COM_CLK_PIN ; disable pullup on CLK
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.endif
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.endmacro
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.macro M_COM2WDATASETLOW
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sbi COM_DATA_DDR, COM_DATA_PIN ; set DATA as output
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cbi COM_DATA_OUTPUT, COM_DATA_PIN ; set DATA low
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.endmacro
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.macro M_COM2WDATASETHIGH
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cbi COM_DATA_DDR, COM_DATA_PIN ; set DATA as input
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.ifndef COM_DATA_PUE
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cbi COM_DATA_OUTPUT, COM_DATA_PIN ; disable pullup on DATA
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.endif
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.endmacro
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.macro M_COM2WSETUPINT0
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inr r16, MCUCR
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cbr r16, (1<<ISC01) | (1<<ISC00)
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sbr r16, (1<<ISC01) | (0<<ISC00) ; falling edge of ATTN
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outr MCUCR, r16
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; sbr r16, (0<<ISC01) | (0<<ISC00) ; low level triggers
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inr r16, COM_IRQ_ADDR_CLK ; enable irq for ATTN line
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sbr r16, (1<<COM_IRQ_BIT_CLK)
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outr COM_IRQ_ADDR_CLK, r16
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.endmacro
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.macro M_COM2WSETUPPCI
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inr r16, COM_IRQ_ADDR_CLK ; enable pin change irq for CLK line
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ori r16, (1<<COM_IRQ_BIT_CLK)
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outr COM_IRQ_ADDR_CLK, r16
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; sbi COM_IRQ_ADDR_CLK, COM_IRQ_BIT_CLK ; enable pin change irq for CLK line
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in r16, GIMSK ; enable pin change irq PCIE0 or PCIE1
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ori r16, (1<<COM_IRQ_GIMSK_CLK)
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out GIMSK, R16
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ldi r16, (1<<COM_IRQ_GIFR_CLK) ; clear pending irq by writing 1 to CLK bit
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out GIFR, r16
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.endmacro
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.macro M_COM2WSETUPPCICR
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inr r16, COM_IRQ_ADDR_CLK ; enable pin change irq for CLK line
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ori r16, (1<<COM_IRQ_BIT_CLK)
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outr COM_IRQ_ADDR_CLK, r16
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inr r16, COM_IRQ_ICR_ADDR ; enable pin change irq in PCICR
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ori r16, (1<<COM_IRQ_ICR_BIT)
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outr COM_IRQ_ICR_ADDR, R16
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ldi r16, (1<<COM_IRQ_IFR_BIT) ; clear pending irq by writing 1 to CLK bit
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out COM_IRQ_IFR_ADDR, r16
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.endmacro
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#endif
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