辽工大电子设计
参考文献
[1]阎石.《数字电子技术基础（第五版）》 北京：高等教育出版社，2006 [2]李哲英.《电子技术及其应用基础》（数字部分）北京：高等教育出版社，2003 [3]郭天祥.《十天学会单片机和C语言编程》 北京；电子工业出版社，2009
辽工大电子设计
附录1 :原理图
VCC1234U2ULN2003_DIP1612345679IN1IN2IN3IN4IN5IN6IN7COMGND8OUT1OUT2OUT3OUT4OUT5OUT6OUT7161514131211101234567891011121314151617181920U1P1B0T2P1B1T2EXP1B2P1B3P1B4P1B5MOSIP1B6MISOP1B7SCKRSTP3B0RXDP3B1TXDP3B2INT0P3B3INT1P3B4T0P3B5T1P3B6WRP3B7RDXTAL2XTAL1GNDVCCP0B0AD0P0B1AD1P0B2AD2P0B3AD3P0B4AD4P0B5AD5P0B6AD6P0B7AD7EAVPPALEPROGPSENP2B7A15P2B6A14P2B5A13P2B4A12P2B3A11P2B2A10P2B1A9P2B0A8VCC5VVCC stepmotorVCC011VCC5VVCCQ110BC109BP8U45VVCCC310uF54038393736353433323130292827262524232221VCC5VVCCR65VVCC200kΩ50%Key=A15R410kΩ50%Key=AR5AIN0AIN1AIN2AIN3A0A1VDDVCC5VPCF8591AOUTVREFAGNDEXTOSCSCLSDAP3.0P3.108052U3761410kΩ50￠Key=A0VSSDS18B20R31kΩR110kΩ0C1C2CRYSTAL_VIRTUAL30pF30pF0VCCVCCIRDGNDP3.2VCC5VGNDI/O5VP3.39R2SONALERT100Ω200 Hz 0
辽工大电子设计
附录 2 :部分子程序
unsigned int LowTime,HighTime; {
unsigned char i,j; for(i=0;i<10;i++) for(j=0;j<33;j++) ; }
void delay(unsigned char n) {
unsigned char i; for(i=0;i void DelayDelay(unsigned int num) { while( --num ) ; } void delay11(unsigned char x) //x*0.14MS { unsigned char i; while(x--) { for (i = 0; i<13; i++) {} } } void beep() //蜂鸣器响一声函数 { unsigned char i; BEEP=1; for (i=0;i<100;i++) { delay1ms(); //BEEP取反 } BEEP=0; //关闭蜂鸣器 delay(250); //延时 } void motor_ffw(unsigned char ii) //unsigned char num, { unsigned char i; unsigned int j; 辽工大电子设计 //while(num--) //{ for (j=0; j<64; j++) //转1*n圈 { for (i=0; i<8; i++) //一个周期转30度 { if(ii==1) P1 = ~FFF[i]; //取数据 ii控制电机的正反转ii=0 或者 ii=1 if(ii==2) P1 = ~FFZ[i]; delay(1); //调节转速 } } //} } void iic_start(void) { //时钟保持高，数据线从高到低一次跳变，I2C通信开始 SDA = 1; SCL = 1; delayNOP(); // 延时5us SDA = 0; delayNOP(); SCL = 0; } void iic_stop(void) { SDA = 0; //时钟保持高，数据线从低到高一次跳变，I2C通信停止 SCL = 1; delayNOP(); SDA = 1; delayNOP(); SCL = 0; } void iicInit(void) { SCL = 0; iic_stop(); } void slave_ACK(void) { SDA = 0; SCL = 1; delayNOP(); SCL = 0; 辽工大电子设计 } void slave_NOACK(void) { SDA = 1; SCL = 1; delayNOP(); SDA = 0; SCL = 0; } void check_ACK(void) { SDA = 1; // 将p1.1设置成输入，必须先向端口写1 SCL = 1; askflag = 0; delayNOP(); if(SDA == 1) // 若SDA=1表明非应答，置位非应答标志askflag askflag = 1; SCL = 0; } void IICSendByte(unsigned char ch) { unsigned char idata n=8; // 向SDA上发送一位数据字节，共八位 while(n--) { if((ch&0x80) == 0x80) // 若要发送的数据最高位为1则发送位1 { SDA = 1; // 传送位1 SCL = 1; delayNOP(); // SDA = 0; SCL = 0; } else { SDA = 0; // 否则传送位0 SCL = 1; delayNOP(); SCL = 0; } ch = ch<<1; // 数据左移一位 } }