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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