; baudrate = clock freq / etu
; std smartcard etu: 372
; other smartcards: 625
-.define clock 8000000
-.define clk_h 4000000
-.define etu 625
-.define etu_h 312
-.define baudrate 5 ; UBRR value for 76800 bits/s (8mhz clock)
+.equ etu = 625
+.equ etu_h = 312
+.equ baudrate = 5 ; UBRR value for 76800 bits/s (8mhz clock)
; sizes
-.define uart_data_len 4
+.equ uart_data_len = 4
; names for registers
.def tmp = r16
.def mode = r26
.def counter_l_tmp = r27
.def counter_h_tmp = r28
-.def address_h = r31
-.def address_l = r30
.def one = r1
.def zero = r0
; state
-.define LOW (1<<0)
-.define LOW_F 1
-.define HIGH (1<<1)
-.define HIGH_F 2
+.equ LOW = (1<<0)
+.equ LOW_F = 1
+.equ HIGH = (1<<1)
+.equ HIGH_F = 2
; mode
-.define STUPID (1<<0) ; forward cam <-> card communication
-.define STUPID_F 1
-.define COOL (1<<1) ; send time (clocks) & state via uart
-.define COOL_F 2
-.define ELITE (1<<2) ; create bytes, maybe even whole command arrays
-.define ELITE_F 3
-.define GODLIKE (1<<3) ; filter and mask for commands to card - send rejected via uart only
-.define GODLIKE_F 4
-.define INCREDIBLE_HACK (1<<4) ; destroy all your hardware
-.define INCREDIBLE_HACK_F 5
+.equ STUPID = (1<<0) ; forward cam <-> card communication
+.equ STUPID_F = 1
+.equ COOL = (1<<1) ; send time (clocks) & state via uart
+.equ COOL_F = 2
+.equ ELITE = (1<<2) ; create bytes, maybe even whole command arrays
+.equ ELITE_F = 3
+.equ GODLIKE = (1<<3) ; filter and mask for commands to card - send rejected via uart only
+.equ GODLIKE_F = 4
+.equ INCREDIBLE_HACK = (1<<4) ; destroy all your hardware
+.equ INCREDIBLE_HACK_F = 5
; but there is only stupid and cool mode right now %)
ldi state,HIGH ; .. as waiting for falling edge of start bit
ldi state_m,0x03
ldi mode,(STUPID|COOL)
-ldi address_h,0
+ldi ZH,0
ldi tmp,1
mov one,tmp
ldi tmp,0
PREPARE_UART:
; write transfer data to sram
-ldi address_l,0x60
-st address_l+,counter_l
-st address_l+,counter_h
-st address_l+,overflow_counter
-st address_l+,state
+ldi ZL,0x60
+st Z+,counter_l
+st Z+,counter_h
+st Z+,overflow_counter
+st Z+,state
; enable uart data register empty interrupt
sbi UCR,UDRIE
cbi UCR,UDRIE
; init counter(s)
-mov address_l,zero
mov tmp,zero
; send the data
;
; read byte from memory and write via uart
-ld tmp1,address_l+
+ld tmp1,Z+
out UDR,tmp1
; increment counter (maybe needed later)