:::
Browsing this Thread:
1 Anonymous Users
|
GPIO<5:4>無法設成'OUTPUT'
|
||||
|---|---|---|---|---|
|
新會員
 
|
片段
*************** list p=12f629 include "c:\program files\mplab ide\mchip_tools\p12f629.inc" __CONFIG _CP_ON&_WDT_OFF&_MCLRE_OFF&_INTRC_OSC_NOCLKOUT&_PWRTE_ON&_BODEN_ON ;***** VARIABLE DEFINITIONS ***** CBLOCK 0x20 clkcount W_TEMP ; STATUS_TEMP ; endc ; ;************************ ORG 0x000 ; coding begins here bsf STATUS,RP0 call 3FFh movwf OSCCAL goto _MAIN ;**************************** ;Interrupt Vector interpt: ORG 0x04 movwf W_TEMP ; ; swapf STATUS,W ; bcf STATUS,RP0 ; ; movwf STATUS_TEMP ; NOP SER_EXIT: bcf STATUS,RP0 ; swapf STATUS_TEMP,W ; ; movwf STATUS ; swapf W_TEMP,F ; swapf W_TEMP,W ; retfie ;**************************** _MAIN: call init _doing: nop goto _doing ;************************** init: ;在PAGE0 bcf STATUS,RP0 ;Bank 0 clrf GPIO ;Init GPIO movlw 07h ;Set GP<2:0> to movwf CMCON ;digital IO(Not ADC IN) bcf T1CON,T1OSCEN bcf T1CON,TMR1GE bsf STATUS,RP0 ;Bank 1 movlw b'11110000' ;wake pull-ups movwf WPU ;clrf ANSEL ;digital I/O movlw b'11001111' movwf TRISIO movlw b'10000000' ; movwf OPTION_REG movlw b'00001111' movwf IOCB ;pin on change bcf STATUS,RP0 NOP bsf INTCON,PEIE bsf INTCON,T0IE bsf INTCON,GIE return END
發表於: 2004/6/13 18:29
|
|||
|
||||
|
Re: GPIO<5:4>無法設成'OUTPUT'
|
||||
|---|---|---|---|---|
|
版主
 
|
我把您的程式，叫進去MPLAB組譯，並且跑了一下，發現，TRISIO的BIT5和BIT4會被設為0，也就是已經是OUTPUT模式了。
並且，我用以下的程式片斷，來測試，發現GPIO 4, GPIO 5也都可以送出0和1資料。 _doing: BSF GPIO,4 NOP BCF GPIO,5 NOP BCF GPIO,4 NOP BSF GPIO,5 nop goto _doing 您是不是碰到了所謂"Read-Modify-Write"的問題？詳情請參考右方「江湖一點訣」。
發表於: 2004/6/18 15:00
|
|||
|
||||
You can view topic.
你 不可以 發起新主題
You cannot reply to posts.
You cannot edit your posts.
You cannot delete your posts.
You cannot add new polls.
You cannot vote in polls.
You cannot attach files to posts.
You cannot post without approval.
You cannot use topic type.
You cannot use HTML syntax.
You cannot use signature.
You cannot create PDF files.
You cannot get print page.
