STC89C52单片机怎么编程使P2.3、P2.4、P2.5配置成开漏状态？ STC89C52单片机C程序求解（有完整程序）
\u8c01\u4f1a\u7528C\u8bed\u8a00\u7f16\u5199\u7a0b\u5e8f\uff1a\u5173\u4e8e\u5355\u7247\u673aSTC89C52\u4fe1\u53f7\u4eceP3.2\u8f93\u5165,P2.5\u8f93\u51fa#include sbit P3.2 = P3^2;sbit P2.5 = P2^5;int main(){ while (1) // loop { while (P3.2 == 1) // P3.2 \u8f93\u5165\u4e3a\u9ad8\u7535\u5e73 { P2.5 = 1; // P2.5 \u8f93\u51fa\u4e3a\u9ad8\u7535\u5e73 } while (P3.2 == 0) // P3.2 \u8f93\u5165\u4e3a\u4f4e\u7535\u5e73 { P2.5 = 0; // P2.5 \u8f93\u51fa\u4e3a\u4f4e\u7535\u5e73 } } return 0;}
\u6211\u7ed9\u4f60\u89e3\u91ca\u4e00\u4e0b\u5427 \u5e0c\u671b\u5e2e\u5f97\u4e0a\u4f60
#include // \u5934\u6587\u4ef6
#define uint unsigned int //\u5b8f\u5b9a\u4e49 \u628auint \u7b49\u4ef7\u4e3a unsigned int
#define uchar unsigned char
sbit CS = P2^0; //\u5b9a\u4e49\u4e09\u4e2a\u7279\u6b8a\u529f\u80fd\u4f4d\uff0c \u6211\u611f\u89c9\u5e94\u8be5\u662f\u9a71\u52a8\u4e00\u4e2a\u4e1c\u897f\u5427\uff0cCS
sbit CLK = P2^1; \u662f\u7247\u9009 \u9ad8\u9009\u4e2d\u6216\u8005\u4f4e\u9009\u4e2d\uff0c CLK\u662f\u901a\u4fe1\u7684\u65f6\u949f\u7ebf\uff0c
sbit SDO = P2^2; SDO\u5e94\u8be5\u662f\u9a71\u52a8\u82af\u7247\u7684\u6570\u636e\u8f93\u51fa\u53e3\uff0c \u4e0d\u8fc7\u5e94\u8be5\u6709\u8f93\u5165\u53e3\u7684\uff1f\uff1f
\u600e\u4e48\u6ca1\u770b\u5230\u7a0b\u5e8f\u91cc\u6709\uff1f\uff1f\uff1f\uff1f
void DELAY(void) //\u7b80\u5355\u7684\u5ef6\u65f6\u5b50\u7a0b\u5e8f
{
uint x,y;
for(y = 5;y > 0;y--)
for(x = 110;x > 0;x--);
}
void main(void)
{
uint i = 0;
uint j = 0;
uint k = 0; \u5b9a\u4e49\u4e09\u4e2a\u53d8\u91cf
TMOD = 0X20;
TH1 = 0XF3; \u5b9a\u65f6\u5668\u5de5\u4f5c\u65b9\u5f0f \u548c\u521d\u503c
TL1 = 0XF3;
TR1 = 1; \u6253\u5f00\u5b9a\u65f6\u5668
REN = 1; REN SM0 SM1 \u662f\u4e32\u53e3\u8fd9\u91cc\u7684\u8bbe\u7f6e \u5177\u4f53\u7684\u4f60\u81ea\u5df1\u770b\u6587\u6863 \u6211\u5c31\u4e0d
SM0 = 0; \u7ec6\u8bf4\u4e86
SM1 = 1;
while(1)
{
CLK = 0;
CS = 1;
SDO = 0;
DELAY();
for(i=0;i<16;i++) \u5faa\u73af16\u6b21 \u5e94\u8be5\u662f\u8981\u4f20\u8f932\u4e2a\u5b57\u8282\u7684\u6570\u636e\u5427\u5427
{
CS = 0; \u8fd9\u4e2a\u7247\u9009\u8c8c\u4f3c\u5e94\u8be5\u653e\u5728\u5faa\u73af\u5916\u9762
CLK = 1; \u65f6\u949f\u7ebf\u7684\u63a7\u5236
DELAY();
k = SDO; \u628a\u9a71\u52a8\u82af\u7247\u8f93\u51fa\u7684\u6570\u636e\u8d4b\u503c\u7ed9K
j = j + k;
j = j << 1; \u521a\u624d\u7684K \u53ea\u662f\u4e00\u4e2a\u4f4d\uff0c \u8fd9\u91cc\u4e24\u53e5\u662f\u8981\u628a\u5b83\u6574\u7406\u6210uint\u578b\u7684\u537316\u4f4d\u7684\uff0c
DELAY();
CLK = 0; \u8fdb\u884c\u5ef6\u65f6 \u548cCLK\u65f6\u949f\u63a7\u5236\uff0c\u5373\u6a21\u62df\u9a71\u52a8\u82af\u7247\u7684\u9a71\u52a8\u65f6\u5e8f
DELAY();
DELAY();
}
CS = 1; \u9009\u4e2d\u6216\u8005\u53d6\u6d88\u7247\u9009 \u6211\u611f\u89c9\u5e94\u8be5\u662f\u53d6\u6d88
SBUF = (j >> 8) & 0XFF; \u628a\u521a\u624d\u4ece\u9a71\u52a8\u82af\u7247\u91cc\u8bfb\u51fa\u7684uint 16\u4f4d\u6570\u636e \u53d6\u9ad8\u516b\u4f4d \u9001\u5165
while(!TI); \u4e32\u53e3\u7684SBUF \u5bc4\u5b58\u5668 \u8c8c\u4f3c\u662f\u8981\u4f20\u7ed9\u7535\u8111 \u6216\u8005\u4e0a\u4f4d\u673a\u8f6f\u4ef6
TI = 0; \u7b49\u5f85\u4f20\u8f93\u5b8c\u6210 \u6e05 \u6807\u5fd7\u4f4d
SBUF = j & 0XFF; \u628a\u521a\u624d\u4ece\u9a71\u52a8\u82af\u7247\u91cc\u8bfb\u51fa\u7684uint 16\u4f4d\u6570\u636e \u53d6\u4f4e\u516b\u4f4d \u9001\u5165
while(!TI); \u4e32\u53e3\u7684SBUF \u5bc4\u5b58\u5668 \u8c8c\u4f3c\u662f\u8981\u4f20\u7ed9\u7535\u8111 \u6216\u8005\u4e0a\u4f4d\u673a\u8f6f\u4ef6
TI = 0; \u7b49\u5f85\u4f20\u8f93\u5b8c\u6210 \u6e05 \u6807\u5fd7\u4f4d
\u4e0a\u9762\u8fd9\u6b21 \u6b63\u597d\u628a UINT\u578b\u7684 16\u4f4d 2\u4e2a\u5b57\u8282\u5168\u90e8\u4f20\u8f93\u5230\u4e0a\u4f4d\u673a
SBUF = 0XFF; \u6700\u540e\u5728\u4f20\u8f930xff \u8fd9\u4e2a\u6570\u636e\u7ed9\u4e0a\u4f4d\u673a
while(!TI);
TI = 0;
}
}
\u597d\u4e86 \u56de\u7b54\u5b8c\u4e86 \uff0c \u5e0c\u671b\u80fd\u5e2e\u5f97\u4e0a\u4f60\u3002
可以使用寄存器和数据选择器构成多路数据总线，比如使用多个74HC573寄存器挂在P0口上，再使用74HC138选通不同的74HC573，从而实现端口复用！还有STC89C52是5v单片机，如果要和3.3V器件进行数据通信，可以使用74LVC4245电平转换芯片做转换！
STC89C52连接3.3V器件时，为防止3.3V器件承受不了5V，可将响应的IO口先串一个330欧的限流电阻到3.3V器件的IO口，响应的口外部加10K上拉电阻到VCC，这样高电平时3,3V，低电平0V，输入输出一切正常。
P0口外接上拉电阻,再用电压表测测
绛旓細//瀹氭椂50ms IE|=0x82; TR0=1;}void main(){ Motor_L=Motor_R=1; InitTimer0(); while(1) { if(K0|K2) { Motor_L=0; Motor_R=1; time2s=40;//2s } if(K1|K3) { Motor_L=1; Motor_R=0; time2s=40; } ...
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绛旓細;鐢ㄦ眹缂栬瑷缂栫▼濡備笅锛歄RG 0000H MOV A, #7FH MOV R2, #7 L: JNB F0, R RL A JMP O R: RR A O: MOV P1, A CALL DL ;寤舵椂 DJNZ R2, L MOV R2, #7 CPL F0 JMP L ;--- DL: ;寤舵椂瀛愮▼搴 DJNZ R7,DJNZ R7,DJNZ R6,...
绛旓細include "reg52.h"define uchar unsigned char define uint unsigned int //--- sbit led = P1^0;sbit key = P0^0;sbit out1= P0^1;sbit out2= P0^2;uint run_cnt;uchar temp;//--- void send_one_byte(unsigned char tad ){ TI=0;SBUF=tad;//鍙戦佹暟鎹 os_wait2...
绛旓細void delay(uint);void main(){ uchar i,j,k;uchar temp;temp=0xfe;while(1){ for(j=1;j>0;j--){ for(i=7;i>0;i--){ P1=temp;delay(200);temp=_crol_(temp,1);} P1=0xff;for(k=6;k>0;k--){ P1=~P1;delay(200);} for(i=7;i>0;i--){ P1=temp;delay(200)...
绛旓細include<reg52.h> define uchar unsigned char define uint unsigned int sbit wr=P1^0;sbit cs1=P1^1;sbit cs2=P1^2;uchar q,w,a[8];uchar code zm[]= { 0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,} void wx(uchar xx){ wr=0;cs2=0;P0=xx;wr=1;cs2=1;} v...
绛旓細鍋囪P0鍙ｆ帴LED;鐩存帴鍦ㄤ腑鏂▼搴忎腑鍐欙細P0=0XFF锛沝elayms(200);P0=0锛沝elayms(200);P0=0XFF锛沝elayms(200);P0=0锛沝elayms(200);P0=0XFF锛沝elayms(200);P0=0锛沝elayms(200);涓荤▼搴忎腑:while(1){ for(i=0;i<8;i++){ P0=1<<i;//鎴栬匬0=0XFE<...
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绛旓細include <reg52.h> include <stdio.h> include <intrins.h> define uchar unsigned char define uint unsigned int sbit sm1= P3^7;sbit sm2=P3^6;sbit sm3=P3^5;sbit sm4=P3^4;sbit led=P2^7;unsigned char table1[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90 }...
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