88 lines
2.5 KiB
NASM
88 lines
2.5 KiB
NASM
; ***************************************************************************
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; copyright : (C) 2024 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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; ***************************************************************************
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;
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; AtTiny 841
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; -------
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; VCC 1 14 GND
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; PB0 2 13 PA0 ATTN0
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; PB1 3 12 PA1 TXD0 (UART0)
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; /RESET PB3 4 11 PA2 RXD0 (UART0)
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; LED PB2 5 10 PA3 ATTN1
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; 1-wire PA7 6 9 PA4 RXD1 (UART1) [SCK, PRG]
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; [MOSI,PRG] SDA (I2C) PA6 7 8 PA5 TXD1 (UART1) [MISO, PRG]
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; -------
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;
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; ***************************************************************************
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.equ BOOTLOADER_ADDR = 0xd00
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.equ FIRMWARE_VARIANT_BOOT = 0
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.equ FIRMWARE_VARIANT_TEMP_WINDOW = 1
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; ---------------------------------------------------------------------------
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; LED module
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.equ LED_SIMPLE_ONTIME = 2
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.equ LED_SIMPLE_OFFTIME = 30
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.equ LED_SIMPLE_DDR = DDRB
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.equ LED_SIMPLE_PORT = PORTB
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.equ LED_SIMPLE_PORTIN = PINB
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.equ LED_SIMPLE_PINNUM = PORTB2
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; ---------------------------------------------------------------------------
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; COM module
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.equ COM_BIT_LENGTH = 52000 ; 104000ns=9600, 52000ns=19200, 26000ns=38400
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.equ COM_HALFBIT_LENGTH = 26000 ; see https://de.wikipedia.org/wiki/Universal_Asynchronous_Receiver_Transmitter
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.equ COM_DATA_DDR = DDRA
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.equ COM_DATA_INPUT = PINA
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.equ COM_DATA_OUTPUT = PORTA
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.equ COM_DATA_PIN = PORTA2
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.equ COM_ATTN_DDR = DDRA
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.equ COM_ATTN_INPUT = PINA
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.equ COM_ATTN_OUTPUT = PORTA
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.equ COM_ATTN_PIN = PORTA0
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.equ COM_IRQ_ADDR_ATTN = PCMSK0
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.equ COM_IRQ_BIT_ATTN = PCINT0 ; bit 7 in PCMSK0
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.equ COM_IRQ_GIFR_ATTN = PCIF0
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.equ COM_IRQ_GIMSK_ATTN = PCIE0
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; ---------------------------------------------------------------------------
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; LCD module
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.equ LCD_TWI_ADDRESS = 0x3c
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; ---------------------------------------------------------------------------
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; 1-Wire Master
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;
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.equ OWI_DDR = DDRA
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.equ OWI_PORTOUT = PORTA
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.equ OWI_PORTIN = PINA
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.equ OWI_PINNUM = PORTA7
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