[SOLVED]No output on LCD screen of green bee project.

hello ajay sir,

thanking you for ur useful advices, help me to solve the prob of coding errors. Now i require ur help.
i m not able to see the output on the lcd , i m getting only boxes in first line and the second line is empty .
i hv checked all d connections of uC ckt. de r perfect according to the ckt diagram.
i hv tested the ckt with n widout installing d uC... n got the same result. i hv also chek d coding part .it seems der is no prob 4m coding side...

so please help me in that part.

http://www.8051projects.net/files/public/1236709942_14263_FT0_lcd3.jpg][/link]

here are the codings of LCD initialization

try increasing the delay in lcddelay routine. I am sure that will solve your problem.

[Edit]
I just checked your images, you forgot to put controller in circuit.

NOTE: Do check vcc pins to make sure there is 5V

try increasing the delay in lcddelay routine. I am sure that will solve your problem.

[Edit]
I just checked your images, you forgot to put controller in circuit.

NOTE: Do check vcc pins to make sure there is 5V

Ajay

Sir i hv checkd both d vcc pt of uC and LCD, i found itz below 5V. So i modified d power supply section n add another 5 V only 4 uC ckt to maintain the voltage drop. And also i hv designed the ckt as per the ckt diagram (ckt images r given below). i m wondering abt the controller in d ckt. cud u pls tell exactly at which pt i miss d controller?

thank you sir 4 ur guide lines....

try increasing the delay in lcddelay routine. I am sure that will solve your problem.

[Edit]
I just checked your images, you forgot to put controller in circuit.

NOTE: Do check vcc pins to make sure there is 5V

Ajay

Sir as u told me , i increas d delay in lcddelay 4m 50 to 250. also give const 5v DC supply to uC ckt to maintain the voltage drop. bt i still hv d same problem. i chked d codings thoroughly, bt find no errors. i dnt know hw 2 over com dis prob ... sir pls help me out. i m also uploading codes 4 ur reference.

BTW have you tried adjusting the contrast of LCD ?



Arun

well sometimes faulty LCD also behave like this

hello Arun sir n TPS

ajay sir ask abt the controler , if u give a close look 2 the pix i post b4 i hv used 10k VR 4 adjusting the LCD contrast. Arun Sir i hv chked the resistance btween VR, whn v hv resitsnce in between 6-10K the Lcd contrast is visible.

And TPS , i hv also guessed dat my LCD may b faulty , so i pluged 4 other NEW LCD dat i hv bought 4 other projects. n got d same single line box as result. bt dos LCDs r working perfectly wid other project.

so pls sir tell me wht r the trouble shootings 4 LCD u hv faced duringg u r projects.
so dat i can analysis dem 2 get d solution. or get me any solution on it. thk u

n Happy holi. !dance

pls somone help me..........

I smell a different problem here..
can you tell me what is LCDDATA is defined?