136 lines
3.1 KiB
ArmAsm
136 lines
3.1 KiB
ArmAsm
;DIP SWICTHES
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;1843200 CLK / x16 SIO CLOCK MODE = 115200
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;MAX BAUD RATE = 115200
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;DIP VALUE = 115200/<BAUD>
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;
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;9600 -> 12 / 00110000
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;
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CONSOLE_INIT:
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CONSOLE_INIT_CTC:
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;LD A,00001111b ; Set /16 Divider, CPU Trigger, Time COnstant Follows
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LD A,01001111b ; External Trigger, Time COnstant Follows
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OUT (CS_CTC_0),A
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IN A,(CS_DIP) ; Read BAUD from DIP-Switches
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;LD A,39
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OUT (CS_CTC_0),A
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CONSOLE_INIT_SIO:
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LD A,00110000b ;write into WR0: error reset, select WR0
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OUT (CS_SIO_A_C),A
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LD a,018h ;write into WR0: channel reset
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OUT (CS_SIO_A_C),A
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LD a,004h ;write into WR0: select WR4
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OUT (CS_SIO_A_C),A
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LD a,01000100b ;write into WR4: clkx16,1 stop bit, no parity
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OUT (CS_SIO_A_C),A
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LD a,005h ;write into WR0: select WR5
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OUT (CS_SIO_A_C),A
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LD a,11101000b ;DTR inactive, TX 8bit, BREAK off, TX on, RTS inactive
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OUT (CS_SIO_A_C),A
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LD a,01h ;write into WR0: select WR1
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OUT (CS_SIO_A_C),A
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LD a,00000100b ;no interrupt in CH B, special RX condition affects vect
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OUT (CS_SIO_A_C),A
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LD a,02h ;write into WR0: select WR2
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OUT (CS_SIO_A_C),A
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LD a,0h ;write into WR2: cmd line int vect (see int vec table)
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;bits D3,D2,D1 are changed according to RX condition
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OUT (CS_SIO_A_C),A
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LD a,003h ;write into WR0: select WR3
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OUT (CS_SIO_A_C),A
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LD a,0C1h ;RX 8bit, auto enable off, RX on
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OUT (CS_SIO_A_C),A
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;Channel A RX active
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RET
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; A contains char
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; Destroys A
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print_char:
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push af
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out (CS_SIO_A_D),a
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call print_wait_out
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pop af
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;call print_char
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ret
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; HL contains pointer to string
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; Destroy A, HL
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print_str:
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ld a, (hl)
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or a
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jr z,print_str_end
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call print_char
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inc hl
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jr print_str
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print_str_end:
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ret
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print_clear:
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ld hl, [MSG_CLEAR]
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call print_str
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ret
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print_newLine:
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ld a,10
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call print_char
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ld a,13
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call print_char
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ret
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; destroys a
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print_wait_out:
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; check for TX buffer empty
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sub a ;clear a, write into WR0: select RR0
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inc a ;select RR1
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out (CS_SIO_A_C),A
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in A,(CS_SIO_A_C) ;read RRx
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bit 0,A
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jr z,print_wait_out
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ret
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print_a_hex:
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push af
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push bc
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push de
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call STRCONV_BYTES_TO_HEX
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ld a,b
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call print_char
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ld a,c
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call print_char
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pop de
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pop bc
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pop af
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read_char:
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call A_RTS_ON
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nop
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xor a ; a = 0
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out (CS_SIO_A_C), a ; select reg 0
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in a, (CS_SIO_A_C) ; read reg 0
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and 1 ; mask D0 (recieve char available)
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call A_RTS_OFF
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ret Z ; return 0 if no char
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in a, (CS_SIO_A_D) ; read char if avail
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ret ; return
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;MSG_CRSR_0:
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; db 0x1B, "[?25h",0
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;MSG_CRSR_1:
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; db 0x1B, "[?25l",0
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MSG_CLEAR:
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db 27, '[2J', 27, '[H',0
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; Serial Util Functions
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A_RTS_OFF:
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ld a,005h ;write into WR0: select WR5
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out (CS_SIO_A_C),A
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ld a,068h ;DTR inactiveh, TX 8bit, BREAK off, TX on, RTS inactive
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out (CS_SIO_A_C),A
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ret
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A_RTS_ON:
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ld a,005h ;write into WR0: select WR5
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out (CS_SIO_A_C),A
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ld a,0EAh ;DTR active, TX 8bit, BREAK off, TX on, RTS active
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out (CS_SIO_A_C),A
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ret |