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如何通过串口给单片机发送指令控制电机不同的转动状态？

问答对人有帮助，内容完整，我也想知道答案 0 如何通过串口给单片机发送指令控制电机不同的转动状态？ 0
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答案对人有帮助，有参考价值 0 通过串口给单片机发送指令控制电机不同的转动状态，此程序是配合普中51-单核-A4开发板写的。请按需服用。欢迎留言讨论。 /1、串口发送00，电机停止转动，指示灯1点亮； 2、串口发送01，电机全速正转，指示灯2点亮； 3、串口发送02，电机全速反转，指示灯3点亮； 4、串口发送03，电机50%速度正转，指示灯2闪烁； 5、串口发送04，电机50%速度反转，指示灯3闪烁；数码管代替指示灯（数码管的正向反向流动，流动速度的快慢代替指示灯）指示灯不亮不闪烁 / #include //头文件 #预处理命令符 inclue预处理命令 #define uint unsigned int #define uchar unsigned char uchar a,b,i; //定义全局变量a的值域，以便下面函数使用 uchar SendBuf[]="The signal is normal"; //定义数组，储存返回语句 uchar code DMZ50[]={0x01,0x01,0x01,0x01,0x02,0x04,0x08,0x08,0x08,0x08,0x10,0x20}; //流水显示的段码，定义为正 uchar code DMF50[]={0x20,0x10,0x08,0x08,0x08,0x08,0x04,0x02,0x01,0x01,0x01,0x01}; //流水显示的段码，定义为反 uchar code DM0[]={0x49,0x36,0x49,0x36,0x49,0x36,0x49,0x36,0x49,0x36,0x49,0x36,0x49,0x36,0x49,0x36}; //流水显示的段码,停 uchar code DMZ[] = {0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x02,0x04, 0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x10,0x20}; uchar code DMF[] = {0x20,0x10,0x08,0x08,0x08,0x08,0x08,0x08,0x08,0x08, 0x04,0x02,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01}; *it WA=P2^2; it WB=P2^3; //74HC138译码器位选管脚（数码管用） *it WC=P2^4; /蜂鸣器/ it BZ=P2^5; //L298N引脚定义 it ena = P1^0; //l298n电机驱动的相关引脚 it in1 = P1^1; it in2 = P1^2; it in3 = P1^3; it in4 = P1^4; it enb = P1^5; uchar MA = 0,MB = 0; //pwm控制用 uchar PWMA = 20; uchar PWMB = 20; uchar cmd; //串口接收的命令uf void delay(uint z); //声明延时函数 /数码管/ void showDigital() { switch(cmd) { case(0): for(i=0;i<16;i++) { switch(i) { case(8): WA = 0;WB = 0;WC = 0;break; case(9): WA = 1;WB = 0;WC = 0;break; case(10): WA = 0;WB = 1;WC = 0;break; case(11): WA = 1;WB = 1;WC = 0;break; case(12): WA = 0;WB = 0;WC = 1;break; case(13): WA = 1;WB = 0;WC = 1;break; case(14): WA = 0;WB = 1;WC = 1;break; case(15): WA = 1;WB = 1;WC = 1;break; case(7): WA = 0;WB = 0;WC = 0;break; case(6): WA = 1;WB = 0;WC = 0;break; case(5): WA = 0;WB = 1;WC = 0;break; case(4): WA = 1;WB = 1;WC = 0;break; case(3): WA = 0;WB = 0;WC = 1;break; case(2): WA = 1;WB = 0;WC = 1;break; case(1): WA = 0;WB = 1;WC = 1;break; case(0): WA = 1;WB = 1;WC = 1;break; } P0 = DM0; delay(250); } break; case(3): for(i=0;i<12;i++) { switch(i) { case(11): WA = 1;WB = 1;WC = 1;break; case(10): WA = 1;WB = 1;WC = 1;break; case(9): WA = 1;WB = 1;WC = 1;break; case(8): WA = 0;WB = 1;WC = 1;break; case(7): WA = 1;WB = 0;WC = 1;break; case(6): WA = 0;WB = 0;WC = 1;break; case(5): WA = 0;WB = 0;WC = 1;break; case(4): WA = 0;WB = 0;WC = 1;break; case(3): WA = 0;WB = 0;WC = 1;break; case(2): WA = 1;WB = 0;WC = 1;break; case(1): WA = 0;WB = 1;WC = 1;break; case(0): WA = 1;WB = 1;WC = 1;break; } P0 = DMZ50; delay(50); } break; case(4): for(i=0;i<12;i++) { switch(i) { case(0): WA = 1;WB = 1;WC = 1;break; case(1): WA = 1;WB = 1;WC = 1;break; case(2): WA = 1;WB = 1;WC = 1;break; case(3): WA = 0;WB = 1;WC = 1;break; case(4): WA = 1;WB = 0;WC = 1;break; case(5): WA = 0;WB = 0;WC = 1;break; case(6): WA = 0;WB = 0;WC = 1;break; case(7): WA = 0;WB = 0;WC = 1;break; case(8): WA = 0;WB = 0;WC = 1;break; case(9): WA = 1;WB = 0;WC = 1;break; case(10): WA = 0;WB = 1;WC = 1;break; case(11): WA = 1;WB = 1;WC = 1;break; } P0 = DMF50; delay(50); } break; case(1): for(i=0;i<20;i++) { switch(i) { case(19): WA = 1;WB = 1;WC = 1;break; case(18): WA = 1;WB = 1;WC = 1;break; case(17): WA = 1;WB = 1;WC = 1;break; case(16): WA = 0;WB = 1;WC = 1;break; case(15): WA = 1;WB = 0;WC = 1;break; case(14): WA = 0;WB = 0;WC = 1;break; case(13): WA = 1;WB = 1;WC = 0;break; case(12): WA = 0;WB = 1;WC = 0;break; case(11): WA = 1;WB = 0;WC = 0;break; case(10): WA = 0;WB = 0;WC = 0;break; case(9): WA = 0;WB = 0;WC = 0;break; case(8): WA = 0;WB = 0;WC = 0;break; case(7): WA = 0;WB = 0;WC = 0;break; case(6): WA = 1;WB = 0;WC = 0;break; case(5): WA = 0;WB = 1;WC = 0;break; case(4): WA = 1;WB = 1;WC = 0;break; case(3): WA = 0;WB = 0;WC = 1;break; case(2): WA = 1;WB = 0;WC = 1;break; case(1): WA = 0;WB = 1;WC = 1;break; case(0): WA = 1;WB = 1;WC = 1;break; } P0 = DMZ; delay(25); } break; case(2): for(i=0;i<20;i++) { switch(i) { case(0): WA = 1;WB = 1;WC = 1;break; case(1): WA = 1;WB = 1;WC = 1;break; case(2): WA = 1;WB = 1;WC = 1;break; case(3): WA = 0;WB = 1;WC = 1;break; case(4): WA = 1;WB = 0;WC = 1;break; case(5): WA = 0;WB = 0;WC = 1;break; case(6): WA = 1;WB = 1;WC = 0;break; case(7): WA = 0;WB = 1;WC = 0;break; case(8): WA = 1;WB = 0;WC = 0;break; case(9): WA = 0;WB = 0;WC = 0;break; case(10): WA = 0;WB = 0;WC = 0;break; case(11): WA = 0;WB = 0;WC = 0;break; case(12): WA = 0;WB = 0;WC = 0;break; case(13): WA = 1;WB = 0;WC = 0;break; case(14): WA = 0;WB = 1;WC = 0;break; case(15): WA = 1;WB = 1;WC = 0;break; case(16): WA = 0;WB = 0;WC = 1;break; case(17): WA = 1;WB = 0;WC = 1;break; case(18): WA = 0;WB = 1;WC = 1;break; case(19): WA = 1;WB = 1;WC = 1;break; } P0 = DMF; delay(25); } break; } } /全速正转/ void forward() { in1=1; //l298n手册，真值 in2=0; in3=1; in4=0; PWMA = 20; PWMB = 20; } /全速反转/ void fallback() { in1=0; in2=1; in3=0; in4=1; PWMA = 20; PWMB = 20; } /50占空比正转/ void quick() { in1=1; in2=0; PWMA = 10; in3=1; in4=0; PWMB = 10; } /50占空比反转/ void slow() { in1=0; in2=1; PWMA = 10; in3=0; in4=1; PWMB = 10; } /停/ void stop() { in1=0; in2=0; in3=0; in4=0; } void delay(uint z) { uint x,y; for(x=z;x>0;x--) for(y=115;y>0;y--); } void SendOneByte(uchar str) //串口发送数据 { while(str !='') { SBUF=str; while(!TI); TI=0; str++; } } void main() //定义主函数，返回值为空 { //串口定时器定时器T0 TMOD = 0x21; //T0定时器为工作方式一，T1定时器为工作方式二 PCON = 0x00; //串口初始化相关，波特率 SCON = 0x50; //串口初始化相关，串口工作方式一，允许接收 TH1 = 0xFD; //设置初值 TL1 = 0xFD; //设置初值 TR1 = 1; //开启定时器T1 TH0 = 0xF4; //设置初值 TL0 = 0x48; //设置初值 TR0 = 1; //开启定时器T0 ES = 1; //开放串口中断 PT0 = 1; //定时器0中断优先 ET0 = 1; //开放定时器T0中断 EA = 1; //开放总中断 SendOneByte("Receiving from 8051...rn"); //发送字符串，结尾回车换行 while(1) { showDigital(); SendOneByte("rn"); delay(500); SendOneByte(SendBuf); } } void time0_int() interrupt 1 { TR0 = 0; TH0 = (65536-500)/256; TL0 = (65536-500)%256; MA++; if(MA < PWMA) { ena = 1; //使用ena来产生pwm波控制A端电机 } else ena = 0; if(MA == 40) { MA = 0; } MB++; if(MB < PWMB) { enb = 1; //使用enb来产生pwm波控制B端电机 } else enb = 0; if(MB == 40) { MB = 0; } TR0 = 1; } void UARTInterrupt(void) interrupt 4 { if(RI) { RI = 0; cmd = SBUF; switch(cmd) { case 1: forward(); break; case 2: fallback(); break; case 3: quick(); break; case 4: slow(); break; case 0: stop(); default: break; } } }

2021-10-21 13:59:10 评论举报李超