; ***************************************************************************
; copyright   : (C) 2024 by Martin Preuss
; email       : martin@libchipcard.de
;
; ***************************************************************************
; * This file is part of the project "AqHome".                              *
; * Please see toplevel file COPYING of that project for license details.   *
; ***************************************************************************

; ***************************************************************************
;
;                                 AtTiny85
;                                 --------
;                     /RESET PB5  1      8  VCC
;                        LED PB3  2      7  PB2  TWI-SDA
;                   COM-DATA PB4  3      6  PB1  TWI-SCL
;                            GND  4      5  PB0  COM-ATTN [PCINT0]
;                                 --------
;
; ***************************************************************************



.equ BOOTLOADER_ADDR = 0xd00


.equ FIRMWARE_VARIANT_BOOT        = 0
.equ FIRMWARE_VARIANT_MAIN        = 1


.equ DEVICEINFO_ID       = 'N'
.equ DEVICEINFO_VERSION  = 18
.equ DEVICEINFO_REVISION = 0


; ---------------------------------------------------------------------------
; LED module

.equ LED_SIMPLE_ONTIME  = 2
.equ LED_SIMPLE_OFFTIME = 50
.equ LED_SIMPLE_DDR     = DDRB
.equ LED_SIMPLE_PORT    = PORTB
.equ LED_SIMPLE_PINNUM  = PORTB3



; ---------------------------------------------------------------------------
; COM module

.equ COM_BIT_LENGTH      = 52000 ; 104000ns=9600, 52000ns=19200, 26000ns=38400
.equ COM_HALFBIT_LENGTH  = 26000 ; see https://de.wikipedia.org/wiki/Universal_Asynchronous_Receiver_Transmitter

.equ COM_DATA_DDR       = DDRB
.equ COM_DATA_INPUT     = PINB
.equ COM_DATA_OUTPUT    = PORTB
.equ COM_DATA_PIN       = PORTB4

.equ COM_ATTN_DDR       = DDRB
.equ COM_ATTN_INPUT     = PINB
.equ COM_ATTN_OUTPUT    = PORTB
.equ COM_ATTN_PIN       = PORTB0

.equ COM_IRQ_ADDR_ATTN   = PCMSK
.equ COM_IRQ_BIT_ATTN    = PCINT0       ; bit 0 in PCMSK0 (PCINT0)
.equ COM_IRQ_GIFR_ATTN   = PCIF
.equ COM_IRQ_GIMSK_ATTN  = PCIE



; ---------------------------------------------------------------------------
; TWI master module

;.equ TWI_BIT_LENGTH = 10000 ; 100000 and 200000 works for display: 10000, 100000, 200000
.equ TWI_BIT_LENGTH = 1 ; 10, 100, 500, 100000 and 200000 works for display: 10000, 100000, 200000

.equ TWI_DDR_SCL          = DDRB
.equ TWI_PORT_SCL         = PORTB
.equ TWI_PIN_SCL          = PINB
.equ TWI_PINNUM_SCL       = PORTB1

.equ TWI_DDR_SDA          = DDRB
.equ TWI_PORT_SDA         = PORTB
.equ TWI_PIN_SDA          = PINB
.equ TWI_PINNUM_SDA       = PORTB2



; ---------------------------------------------------------------------------
; SI 7021

.equ SI7021_ADDR          = 0x40



; ---------------------------------------------------------------------------
; CCS 811
;

.equ CCS811_ADDR = 0x5a ; or 0x5b