本帖最后由 木易阳 于 2018-3-21 18:17 编辑 wulin 发表于 2018-3-20 20:46 谢谢，就是他的外部中断3是怎么控制的，比如说我按下按键发出外部中断3信号，串口开始发送DATA里的数据，但是数据发送是乱码 #include <reg51.h> char code DATA[19]={0x02, 0x6c, 0x62, 0x03, 0x03, 0x03, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc1}; //隐 unsigned char i=0; //----------------------------------------- //define baudrate const //BAUD = 65536 - FOSC/3/BAUDRATE/M (1T:M=1; 12T:M=12) //NOTE: (FOSC/3/BAUDRATE) must be greater then 98, (RECOMMEND GREATER THEN 110) #define BAUD 0xFE80 // 9600bps @ 11.0592MHz sfr AUXR = 0x8E; sfr INT_CLKO = 0x8f; sbit RXB = P3^0; //define UART TX/RX port sbit TXB = P3^1; sbit T3 = P3^5; sbit led = P3^4; typedef bit BOOL; typedef unsigned char BYTE; typedef unsigned int WORD; BYTE TBUF,RBUF;//字节 BYTE TDAT,RDAT; BYTE TCNT,RCNT; BYTE TBIT,RBIT; BOOL TING,RING; BOOL TEND,REND; void UART_INIT(); BYTE r; BYTE buf[16]; int k=0; //----------------------------------------- //initial UART module variable void UART_INIT() { TING = 0; RING = 0; TEND = 1; REND = 0; TCNT = 0; RCNT = 0; } void exint3() interrupt 11 { k = 1; led = 1; } void main() { TMOD = 0x00; //timer0 in 16-bit auto reload mode定时器0在16位自动重新加载模式下 AUXR = 0x80; //timer0 working at 1T mode定时器0在1T模式下工作 TL0 = BAUD; TH0 = BAUD>>8; //initial timer0 and set reload value初始计时器0并设置重新加载值 TR0 = 1; //tiemr0 start runningtimer0 tiemr0开始运行 ET0 = 1; //enable timer0 interrupt使timer0中断 PT0 = 1; //improve timer0 interrupt priority提高定时器0中断优先级 EA = 1; //总中断 led = 0; INT_CLKO |= 0x20; UART_INIT(); while (1) { //user's function if (REND) { REND = 0; buf[r++ & 0x0f] = RBUF; //接收缓冲器 高四位清0低四位赋值 } if(k == 1) { if (TEND) { for(i=0;i<19;i++)// { TEND = 0; //发送完一个字符清一次 TBUF = DATA;//发送缓冲器 进行赋值 TING = 1; } k = 0; } } } } //----------------------------------------- //Timer interrupt routine for UART计时器中断串口 void tm0() interrupt 1 using 1 { //****************接收数据******************/ if (RING) //正在接受数据 { if (--RCNT == 0) { RCNT = 3; //reset send baudrate counter 复位发送波特率计数器 if (--RBIT == 0) { RBUF = RDAT; //save the data to RDAT数据保存到RBUF中 RING = 0; //stop receive 停止接受 REND = 1; //set receive completed flag设置接收完成标志 } else { RDAT >>= 1; //接收到的单bit数据暂存 if (RXB) RDAT |= 0x80; //shift RX data to RX buffer 将RX数据转移到RX缓冲区 } } } else if (!RXB)//判断开始位RXB=0 { RING = 1; //set start receive flag 设置开始接收标志 RCNT = 4; //initial receive baudrate counter 初始接收波特率计数器 RBIT = 9; //initial receive bit number (8 data bits + 1 stop bit) 初始接收位(8位数据位1停止位) } //*******************发送********************/ if (--TCNT == 0) { TCNT = 3; //reset send baudrate counter 复位发送波特率计数器 if (TING) //judge whether sending 判断是否发送 { if (TBIT == 0) { TXB = 0; //send start bit 发送起始位 TDAT = TBUF; //load data from TBUF to TDAT 数据从TBUF加载到TDAT TBIT = 9; //initial send bit number (8 data bits + 1 stop bit)初始发送位(8位数据位1停止位) } else { TDAT >>= 1; //shift data to CY将 数据右移1位，低位送给CY if (--TBIT == 0) { TXB = 1; //发送停止位数据 TING = 0; //stop send发送停止位 TEND = 1; //set send completed flag设置发送完成标志 } else { TXB = CY; //write CY to TX port 发送单bit数据 } } } } } |
木易阳 发表于 2018-3-20 14:02 芯片没有硬件串口，也就是说没有与串口相关的寄存器，当然也就没有SBUF寄存器！ /*---------------------------------------------------------------------*/ /* --- STC MCU Limited ------------------------------------------------*/ /* --- STC15Fxx 系列 软件模拟串口举例----------------------------------*/ /* --- Mobile: (86)13922805190 ----------------------------------------*/ /* --- Fax: 86-0513-55012956,55012947,55012969 ------------------------*/ /* --- Tel: 86-0513-55012928,55012929,55012966-------------------------*/ /* 如果要在程序中使用此代码,请在程序中注明使用了STC的资料及程序 */ /* 如果要在文章中应用此代码,请在文章中注明使用了STC的资料及程序 */ /*---------------------------------------------------------------------*/ //本示例在Keil开发环境下请选择Intel的8058芯片型号进行编译 //若无特别说明,工作频率一般为11.0592MHz #include "reg51.h" //----------------------------------------- //define baudrate const //BAUD = 65536 - FOSC/3/BAUDRATE/M (1T:M=1; 12T:M=12) //NOTE: (FOSC/3/BAUDRATE) must be greater then 98, (RECOMMEND GREATER THEN 110) //#define BAUD 0xF400 // 1200bps @ 11.0592MHz //#define BAUD 0xFA00 // 2400bps @ 11.0592MHz //#define BAUD 0xFD00 // 4800bps @ 11.0592MHz //#define BAUD 0xFE80 // 9600bps @ 11.0592MHz //#define BAUD 0xFF40 //19200bps @ 11.0592MHz #define BAUD 0xFFA0 //38400bps @ 11.0592MHz //#define BAUD 0xEC00 // 1200bps @ 18.432MHz //#define BAUD 0xF600 // 2400bps @ 18.432MHz //#define BAUD 0xFB00 // 4800bps @ 18.432MHz //#define BAUD 0xFD80 // 9600bps @ 18.432MHz //#define BAUD 0xFEC0 //19200bps @ 18.432MHz //#define BAUD 0xFF60 //38400bps @ 18.432MHz //#define BAUD 0xE800 // 1200bps @ 22.1184MHz //#define BAUD 0xF400 // 2400bps @ 22.1184MHz //#define BAUD 0xFA00 // 4800bps @ 22.1184MHz //#define BAUD 0xFD00 // 9600bps @ 22.1184MHz //#define BAUD 0xFE80 //19200bps @ 22.1184MHz //#define BAUD 0xFF40 //38400bps @ 22.1184MHz //#define BAUD 0xFF80 //57600bps @ 22.1184MHz sfr AUXR = 0x8E; sbit RXB = P3^0; //define UART TX/RX port sbit TXB = P3^1; typedef bit BOOL; typedef unsigned char BYTE; typedef unsigned int WORD; BYTE TBUF,RBUF; BYTE TDAT,RDAT; BYTE TCNT,RCNT; BYTE TBIT,RBIT; BOOL TING,RING; BOOL TEND,REND; void UART_INIT(); BYTE t, r; BYTE buf[16]; void main() { TMOD = 0x00; //timer0 in 16-bit auto reload mode AUXR = 0x80; //timer0 working at 1T mode TL0 = BAUD; TH0 = BAUD>>8; //initial timer0 and set reload value TR0 = 1; //tiemr0 start running ET0 = 1; //enable timer0 interrupt PT0 = 1; //improve timer0 interrupt priority EA = 1; //open global interrupt switch UART_INIT(); while (1) { //user's function if (REND) { REND = 0; buf[r++ & 0x0f] = RBUF; } if (TEND) { if (t != r) { TEND = 0; TBUF = buf[t++ & 0x0f]; TING = 1; } } } } //----------------------------------------- //Timer interrupt routine for UART void tm0() interrupt 1 using 1 { if (RING) { if (--RCNT == 0) { RCNT = 3; //reset send baudrate counter if (--RBIT == 0) { RBUF = RDAT; //save the data to RBUF RING = 0; //stop receive REND = 1; //set receive completed flag } else { RDAT >>= 1; if (RXB) RDAT |= 0x80; //shift RX data to RX buffer } } } else if (!RXB) { RING = 1; //set start receive flag RCNT = 4; //initial receive baudrate counter RBIT = 9; //initial receive bit number (8 data bits + 1 stop bit) } if (--TCNT == 0) { TCNT = 3; //reset send baudrate counter if (TING) //judge whether sending { if (TBIT == 0) { TXB = 0; //send start bit TDAT = TBUF; //load data from TBUF to TDAT TBIT = 9; //initial send bit number (8 data bits + 1 stop bit) } else { TDAT >>= 1; //shift data to CY if (--TBIT == 0) { TXB = 1; TING = 0; //stop send TEND = 1; //set send completed flag } else { TXB = CY; //write CY to TX port } } } } } //----------------------------------------- //initial UART module variable void UART_INIT() { TING = 0; RING = 0; TEND = 1; REND = 0; TCNT = 0; RCNT = 0; } |
wulin 发表于 2018-3-20 10:21 就是用的USB线连得串口线，data不能直接给SBUF吗?为什么？谢谢回答 |
木易阳 发表于 2018-3-20 08:37 1.此芯片没有硬件串口， SBUF = DATA[a]; 有什么用？要用软件模拟串口 2.外部中断3允许位 INT_CLKO |= 0x20; //(EX3 = 1)使能INT3中断 void exint3() interrupt 11 //INT3中断入口 { 中断任务...... // INT_CLKO &= 0xDF; //若需要手动清除中断标志,可先关闭中断,此时系统会自动清除内部的中断标志 // INT_CLKO |= 0x20; //然后再开中断即可 } |
wulin 发表于 2018-3-19 21:53 资料里的中段3没看懂啊 |
devcang 发表于 2018-3-19 22:21 我的外部中断写的应该有问题，不太明白，新手 |
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芯片型号 : STC15L100 关于此芯片的重要说明: 无硬件串口,可用软件模拟串口 (范例代码中有参考代码) 有定时器0和定时器2 (注意:无定时器1) |
组图打开中，请稍候......
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