hi Also i had done on transmitting and receiving a character. but then on transmitting and receiving a string.. i have done it but then it is not receving what i had transmitted...what is the problem?? but can any give me a guide or source??
"i don receive the same string on the LCD" So what do you receive!?! What exactly is wrong with it? And what about the other questions I asked you: What steps have you taken to degug this yourself? Have you tried it in the Simulator?
i am using C8051F226. i tried on transmitting a character and it is working just that now i changed it to transmitting and receiving a string and i does not work.. the receiving program.... $include (c8051f200.inc) flag bit 00h ERR_FLG EQU 01H MSG EQU 600H ORG 0000H JMP MAIN org 23H jmp serial_isr ORG 0100H ;---------------SETTING-------------------- MAIN: ;CLOCK SETTING NOP NOP NOP MOV OSCXCN,#0E7H NOP NOP NOP ORL OSCXCN,#00H NOP NOP MOV OSCICN,#08H ;-> INTERNAL OSCILLATOR CONTROL SETTING NOP NOP MOV WDTCN,#0DEH mov WDTCN, #0ADH ;//Port initialization for P0.0, Page 93 MOV PRT0CF,#03H MOV P0MODE,#03H MOV PRT0MX,#01H MOV P0,#0FCH MOV PRT1CF,#0FFH MOV P1MODE,#0FFH MOV PRT1MX,#00H MOV PCON,#80H MOV SCON,#70H MOV TMOD,#20H MOV TH1,#0FDH CLR FLAG SETB TR1 SETB EA SETB ES CLR P2.5 ; GOT MAIN INITIALLY CLR P2.6 MOV A,#038H CALL STROBE MOV A,#0CH CALL STROBE MOV A,#06H CALL STROBE MOV A,#01H CALL STROBE MOV A,#02H CALL STROBE SETB P2.5 MOV DPTR,#MSG NEXT: CLR A MOVC A,@A+DPTR ANL A,#01111111B CJNE A,#0DH,LOOP JMP HERE LOOP: CALL STROBE INC DPTR JMP NEXT HERE: JMP HERE STROBE: SETB P2.7 MOV P1,A CALL DELAY CLR P2.7 RET CLR P2.5 ;Send command CLR P2.6 ;Write command LCALL STROBE SETB P2.5 RET ;--------END OF SETTING------------------- ;--------DELAY---------------------------- DELAY: MOV R0,#10H AA: MOV R1,#55H BB: DJNZ R1,BB DJNZ R0,AA RET ;------ END OF DELAY --------------------- ;-------- PHRASE STORAGE------------------ ORG 600H DB '',0DH ;-------- END OF PHRASE STORAGE ---------- ;RX1: MOV R0,#30H ;Move to R0 RX: SETB EA JNB flag,RX CLR EA CLR FLAG MOV A,SBUF ;JMP CLCD ;MOVC A,@A+DPTR ;CJNE A,#0DH,CLCD ;INC DPTR CALL STROBE ;LCALL STROBE ;LCALL CLCD ;LCALL PRINTN ;MOV @R0,A ;INC R0 ;CJNE R0,#03FH,RX ;MOV P1, #00H CLR ERR_FLG ;MOV R1, #30H LOOP1: CJNE @R1, #55H, SET_FLG BACK: INC R1 CJNE R1,#3FH, LOOP1 JNB ERR_FLG,SKIP MOV P1, #0FFh SKIP: JMP $ SET_FLG:SETB ERR_FLG JMP BACK serial_isr: SETB flag CLR RI RETI END I interface with what i had received to the LCD and it does not result in the LCD. Also i probe an oscilloscope to transmit pin there is signal but not the receive pin. Can the error be in this receiving part??
CAN any one help??? i really need help on transmitting and receiving string.. really
"CAN any one help???" Not if you don't answer the questions!
Have you read Application Note 161 Interface and Simulation of an LCD Text Display http://www.keil.com/appnotes/docs/apnt_161.asp You can use this to run your code in the simulator, to check if your code is correct. If the Simulator shows that your code is correct, but it still doesn't work in your target, that suggests that you have a hardware fault - although it could just be that the simulator does not quite simulate your particular device correctly... ;-)