?? serial.s,v
字號:
head 1.2;access;symbols;locks tom:1.2; strict;comment @# @;1.2date 2001.03.15.10.39.06; author tom; state Exp;branches;next 1.1;1.1date 2001.03.12.07.14.00; author tom; state Exp;branches;next ;desc@serial library routines@1.2log@removed renable on tx - was stopping rx,@text@## Simple serial I/O routine for hc11# .include "../include/symbols.f1w.h" .include "serial.h" .section .text;; Initialise serial port with baud rate constant in A;serial_init: psha pshx ldx #REGBS staa BAUD,x clra staa SCCR1,x bset SCCR2,x #0b00001100 pulx pula rts;; Flush serial port;serial_flush: pshx ldx #REGBS brclr SCSR,x #0b10000000 . pulx rts;; Send character in A to serial port;serial_send: pshx ldx #REGBS bsr serial_flush staa SCDR,x pulx rts;; Print the string pointed to by X to the serial port ; terminate with a null;serial_send_string: psha pshxsss_next: ldaa 0,x tsta beq .sss_done bsr serial_send inx bra sss_next.sss_done: pulx pula rts;; Print the carriage return and line feed to the serial port;serial_send_crlf: psha ldaa #0xd bsr serial_send ldaa #0xa bsr serial_send pula rts;; Print the hex value of A to the serial port;serial_send_hex_byte: psha pshb tab lsra lsra lsra lsra cmpa #10 bge .upper1 adda #'0 bra .out1.upper1: adda #'A - 10.out1: jsr serial_send tba anda #0b00001111 cmpa #10 bge .upper2 adda #'0 bra .out2.upper2: adda #'A - 10.out2: jsr serial_send pulb pula rts @1.1log@Initial revision@text@a40 1 bset SCCR2,x #0b000010000@?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -