; ***************************************************************************
; Source file for base system node on AtTiny 84
;
; This is for the maintenance system (i.e. the flash loader).
;
; All definitions and changes should go into this file.
;
;
;                                 AtTiny84
;                                 --------
;                            VCC  1     14  GND
;                            PB0  2     13  PA0
;                            PB1  3     12  PA1  COM-DATA
;                  /RESET    PB3  4     11  PA2
;                  KEY1      PB2  5     10  PA3  LED
;                  COM_ATTN  PA7  6      9  PA4
;                            PA6  7      8  PA5
;                                 --------
;
; ***************************************************************************



.nolist
.include "include/tn84def.inc" ; Define device ATtiny84
.list

.include "defs.asm"



; ***************************************************************************
; defines

; ---------------------------------------------------------------------------
; generic

.equ clock=1000000 ; Define the clock frequency


.include "utils_wait.asm"
.include "com2_defs.asm"
.include "comproto_defs.asm"



; ---------------------------------------------------------------------------
; firmware settings including list of modules used

#define FW_TYPE    AQHOME_FW_TYPE_ATT84_BASE
#define FW_VERSION 0x0001


#define BASE_SYSTEM
#define WITH_FLASH

#define MODULES_TIMER
#define MODULES_COM
;#define MODULES_LED
; #define MODULES_TWI_MASTER
; #define MODULES_LCD
; #define MODULES_SI7021


.set MODULES_MASK = 0
#ifdef MODULES_TIMER
.set MODULES_MASK = MODULES_MASK | (1<<AQHOME_FW_MODULE_TIMER)
#endif
#ifdef MODULES_COM
.set MODULES_MASK = MODULES_MASK | (1<<AQHOME_FW_MODULE_COM)
#endif
#ifdef MODULES_LED
.set MODULES_MASK = MODULES_MASK | (1<<AQHOME_FW_MODULE_LED)
#endif
#ifdef MODULES_TWI_MASTER
.set MODULES_MASK = MODULES_MASK | (1<<AQHOME_FW_MODULE_TWIMASTER)
#endif
#ifdef MODULES_LCD
.set MODULES_MASK = MODULES_MASK | (1<<AQHOME_FW_MODULE_LCD)
#endif
#ifdef MODULES_SI7021
.set MODULES_MASK = MODULES_MASK | (1<<AQHOME_FW_MODULE_SI7021)
#endif



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

.equ COM_BIT_LENGTH      = 52000 ; 104000=9600, 52000=19200, 26000=38400

.equ COM_DDR_DATA        = DDRA
.equ COM_PORT_DATA       = PORTA
.equ COM_PIN_DATA        = PINA
.equ COM_PINNUM_DATA     = PORTA1

.equ COM_DDR_ATTN        = DDRA
.equ COM_PORT_ATTN       = PORTA
.equ COM_PIN_ATTN        = PINA
.equ COM_PINNUM_ATTN     = PORTA7

.equ COM_IRQ_ADDR_ATTN   = PCMSK0
.equ COM_IRQ_BIT_ATTN    = 7              ; bit 7 in PCMSK0
.equ COM_IRQ_GIFR_ATTN   = PCIF0
.equ COM_IRQ_GIMSK_ATTN  = PCIE0



; ***************************************************************************
; code segment

.cseg
.org 0x0000



; ---------------------------------------------------------------------------
; Reset and interrupt vectors
;  rjmp start ; Reset vector
  rjmp main ; Reset vector
  reti ; EXT_INT0
  reti ; PCI0
  reti ; PCI1
  reti ; WATCHDOG
  reti ; ICP1
  reti ; OC1A
  reti ; OC1B
  reti ; OVF1
  reti ; OC0A
  reti ; OC0B
  reti ; OVF0
  reti ; ACI
  reti ; ADCC
  reti ; ERDY
  reti ; USI_STR
  reti ; USI_OVF


firmwareType:    .dw FW_TYPE
firmwareVersion: .dw FW_VERSION
firmwareModules: .dw MODULES_MASK
firmwareStart:   .dw 0 ; will be overwritten when flashing



; ***************************************************************************
; main code


.org 0xd00


main:
  rjmp bootLoader




; ***************************************************************************
; includes

.include "com2_lowlevel.asm"
.include "com2_crc.asm"
.include "com2_packets.asm"
.include "crc8.asm"
.include "flash.asm"
.include "flashproto.asm"