单片机控制打印机自动随机打印

typedef unsigned char uint8; typedef unsigned int uint16; //#include <reg51.h> #include "stc12c2052ad.h" #define shakehand 0x18 #define answer_PC 0x28 #define print_page 0x55 uint16 T_delay = 0; uint16 T_led = 0; uint16 T_detect = 0; uint16 MARKA = 0; #define f_print_enable 0x0001 #define f_connect 0x0002 #define f_delay_enable 0x0004 void sys_init(void) { /* 1 端口全为准双向口，故无需配置 */ // P3M0 = 0x08; // P3M1 = 0x08; /* T0作为10MS延时，属于慢速，故采用传统12分频 T1因晶振为12M，为满足波特率要求，只能采用1分频 RELOAD = 256 - INT（Fosc / Baud0 / 32 + 0.5) Baud = Fosc / (256 - RELOAD) / 32 error = ((Baud - Boud0) / Boud0 * 100%)<4.5% UART仍需采用12分频，不能选择2分频，否则波特率不对； */ AUXR = 0x40; //T0为12分频，T1为1分频，UATRT为12分频，AD、SPI、低压中断禁. CLOCK_DIV = 0; //不分 频 /* 3 看门狗配置，2.0971秒 */ WDT_CONTR = 0x3D; //使能看门狗，喂狗语句同此句/ /* 4 定时器初始化、UART初始化 T1工作于模式2，作为波特率发生器，波特率=9600； T0工作于模式1，16位定时中断，定时50mS */ TMOD = 0x21; TH0 = 0xD8; TL0 = 0xF0; ET0 = 1; //开定时器0中断 TR0 = 1; SCON = 0X50; //8位可变波特率，无奇偶校验位 PCON = 0x00; //波特率不加速 TH1 = 0xD9; TL1 = 0xD9; TR1 = 1; //开定时器1 ES = 1; //允许串口中断 /* 5 外部中断0初始化 */ IT0 = 1; //外部中断下降沿触发中断 // EX0 = 1; //允许外部中断 EA = 1; //开总中断 } void send_UART(uint8 i) { ES = 0; //关串口中断 TI = 0; //清零串口发送完成中断请求标志 SBUF = i; while(TI == 0); //等待发送完成 TI = 0; ES = 1; //允许串口中断 } void UART_Interrupt(void) interrupt 4 { uint8 k = 0; if(RI == 1) { RI = 0; k = SBUF; if(k == shakehand) //电脑连接正确 { MARKA |= f_connect; send_UART(answer_PC); } } else { TI = 0; } } void INT0_Interrupt(void) interrupt 0 { if(MARKA & f_print_enable) { send_UART(print_page); MARKA &= ~f_print_enable; MARKA |= f_delay_enable; } } void T0_Interrupt(void) interrupt 1 { TR0 = 0; TH0 = 0xD8; TL0 = 0xED; //加三个周期补偿 TR0 = 1; T_led++; T_detect++; if(MARKA & f_delay_enable) { T_delay++; if(T_delay >= 500) //延时= 500 * 10mS = 5S { MARKA |= f_print_enable; T_delay = 0; MARKA &= ~f_delay_enable; } } } void led_flash(void) { if(T_led >= 50) { P3_3 = !P3_3; T_led = 0; } } /* void delay(void) { uint16 i; for(i=0;i<2000;i++) { ; } } */ void main(void) { sys_init(); P3_3 = 0; MARKA |= f_print_enable; /* send_UART(shakehand); delay(); if(MARKA & f_connect) { EX0 = 1; MARKA |= f_print_enable; } */ while(1) { WDT_CONTR = 0x3D; led_flash(); if(MARKA & f_connect) { EX0 = 1; } else { EX0 = 0; } } }