小弟最近開始接觸8051 現在想要做從PC端發送字串 然後透過RS232傳輸給8051然後在LCD上顯示出來    目前小弟做出來 只能正常顯示一個字元 想要嘗試一次傳送一個字串並顯示出來 卻遇到瓶頸 希望能在此得到協助 <textarea class="c#" rows="10" cols="60" name="code"> 請在此區域輸入程式碼 //mcs-51 #include #include sbit RS = P2^0; sbit RW = P2^1; sbit En = P2^2; void delay(void); void InitialLCD(void); void WriteLCDcmd(char); void WriteLCDdata(char); void CheckBusy(void); void print(char line,char *str); char *string; main() { TMOD = 0x20; TH1 = 253; TL1 = 253; TR1 = 1; SCON = 0x50; InitialLCD(); WriteLCDcmd(0x84); print(1,"READY OK"); while(1) { while(RI==0) RI=0; *string = SBUF; print(1,string); delay(); } } //main void InitialLCD(void) { WriteLCDcmd(0x38); WriteLCDcmd(0x38); WriteLCDcmd(0x38); WriteLCDcmd(0x38); WriteLCDcmd(0x08); WriteLCDcmd(0x01); WriteLCDcmd(0x0c); WriteLCDcmd(0x06); } //初始化LCD void WriteLCDcmd(char instruction) { RS = 0; RW = 0; En = 1; P1 = instruction; En = 0; CheckBusy(); } //寫命令至LCD void WriteLCDdata(char i) { RS = 1; RW = 0; En = 1; P1 = i; En = 0; CheckBusy(); } //寫字串至LCD void CheckBusy(void) { char i=0x80; while(i&0x80) { RS=0; RW=1; En=1; i=P1; En=0; delay(); } } void delay(void) { int i; for(i=0;i<500;i ); } void print(char line,char *str) { int i; if(line==1) { WriteLCDcmd(0x80); for(i=0;i<16;i ) WriteLCDdata(' '); WriteLCDcmd(0x80); } else { WriteLCDcmd(0x80); for(i=0;i<16;i ) WriteLCDdata(' '); WriteLCDcmd(0xc0); } do{WriteLCDdata(*str );} while(*str!='\0'); } //輸出到lcd </textarea>

大大:
8051一次RI!=0只能收到一個BYTE, 我的建議您去買些書來參考.