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; Copyright (C) 2003, Alexander 'E-Razor' Krause
; admin@erazor-zone.de
; http://projects.erazor-zone.de/ezusb
; First test of the Cypress EZ-USB and ep0
.inc ezusb_reg_inc.asm
.org 0x0000
ljmp init
.org 0x0100
init:
mov dptr, #PORTCCFG
mov a, #00000000b
movx @dptr, a
mov dptr, #OEC
mov a, #11111111b
movx @dptr, a
;main
;mov dptr, #0x000ah
;mov a,#0x00h
;movx @dptr,a
begin:
mov dptr, #0x000ah
movx a,@dptr
mov dptr, #OUTC
movx @dptr, a
;lcall Wait100msec
ljmp begin
;10ms loop
Wait100msec:
mov r1, #100
Wait1msec: ; A delay loop
mov dptr,#-1200
More: inc dptr ; 3 cycles
mov a,dpl ; + 2
orl a,dph ; + 2
jnz More ; + 3 = 10 cycles x 1200 = 1msec
djnz r1, Wait1msec ;
ret
; Copyright (C) 2003, Alexander 'E-Razor' Krause
; admin@erazor-zone.de
; http://projects.erazor-zone.de/ezusb
;
; First test of the Cypress EZ-USB
; Rotates a bit from port C and B
;
; Many thanks to Mr. Tony Cureington for ezusb2131.o !
;
.inc ezusb_reg_inc.asm
.org 0x0000
ljmp init
.org 0x0100
init:
mov dptr, #PORTBCFG ;all bits are io
mov a, #00000000b
movx @dptr, a
mov dptr, #PORTCCFG
mov a, #00000000b
movx @dptr, a
mov dptr, #OEB ;enable complete output latch
mov a, #11111111b
movx @dptr, a
mov dptr, #OEC
mov a, #11111111b
movx @dptr, a
;main
mov r1, #10000000b
begin:
mov dptr, #OUTB
mov a,r1
rrc a
mov r1,a
movx @dptr, a
mov dptr, #OUTC
movx @dptr, a
;lcall Wait100msec
ljmp begin
;100ms loop
Wait100msec:
mov r0, #100
Wait1msec: ; A delay loop
mov dptr,#-1200
More: inc dptr ; 3 cycles
mov a,dpl ; + 2
orl a,dph ; + 2
jnz More ; + 3 = 10 cycles x 1200 = 1msec
djnz r0, Wait1msec ;
ret