http://www.8051projects.net/ Learn to make simple microcontroller projects, pic, 8051, avr and arm projects. download 8051 projects, tutorials, libraries, sample codes. join the microcontroller discussion forum and ask doubts regarding electronics. the best source for 8051 over internet. en-gb 2009-01-07T21:48:18-08:00 contact@nospam.com hourly 1 2000-01-01T12:00+00:00 http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 Hi. I want to send some characters to pc.I set baud rate 9600 in the pic.Then connect tx pin to serials rx. but in hyperterminal doesnt appear anything.Then i set baud 2400 in my pic program. and opened hyperterminal . got some character but wrong chrachter .i sent 1 but get gç i also used max232 but nothing changed.please help. what is wrong? http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 Ajay please take a look at tutorial.. you will get a better idea..http://www.8051projects.net/lcd-interfacing/ http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 jiraju I recommend u to first check ur PC's serial port by shorting pin2 & 3 and send some characters via Hyper terminal. make sure u enabled the echo type character locally in settings->ASCII setup.One more thing ground ur rx232 port's 5th pin with ur PC's 5th pin. http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 Ajay keep flow control none.well if its working then you must see whatever you are typing.try 115200 baud. http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 turker1 i tried. shorted 2&3. pins. then set baud rate 9600 and flow control hardware but when i send something nothing arrived. http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 jiraju ok means u checkd ur PC serial port...and since nothing is arrived in hyper terminal it means that there is some problem in ur PCs serial port...did u select the correct COM port in PC???? to check that go to device manager-> Ports where u check the which port is assigned for serial port. And in hyper terminal select that port only and sort pin 2&3 of PC serial port and check again. http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 turker1 ok. which baud rate must i use? and flow control must be hardware or none? http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 turker1 i tried if i press a key then comes the same one (without pressing enter)so com port works.now what is the problem? http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 sashijoseph i also used max232 but nothing changed. You mean you even connected the PIC and PC without MAX232?If so then your PIC's serial port may be busted.Try using a different PIC and also show us your code.And remember never hook up the mcu's and PC's serial ports without a level converter. http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 turker1 but i only used pic's tx pin. so i can connect directly.if i use rx so i must use max232.i connected pic's tx to serial 's rx and gnd to (-)my program:#include <16F628.h>#use delay(clock=4000000)#use rs232(baud=9600, xmit=PIN_b1, rcv=PIN_b2)void main(){for (;;){putc('1');}} http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 shyam r u using CCS PCM compiler?? the cod eseems that way...while burning to the chip did u check the correct configuration... ??i mean oscillator type and WD..your problem can be due to enabled watch dog or wrong choice of oscillator... http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 turker1 hey what is wrong? http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 Ajay your connections are not seem to be fine..plz post your circuit cannot understand what are you saying..and yes you need max232 for connecting PIC to PC. http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 turker1 circuit in attach.i did as circuit. but with my code (i gave it) it doesnt work.sometimes some character comes. but characters > $%& i want to send only "1". http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 Ajay what is crystal frequency you are using? and baud? http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 turker1 i selected intrc. 4 mhz and my c program too. and i tried 9600. but nothing happened. then i select 2400 only hyperterminal. some different characters came.i used for loop. so it must come every loop. but that characters comes sometimes.and isnt "1" http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 turker1 my connection is same in the picture. shyam and ajay please help. it doesnt work. only 16 box appear what is problem. how can i set 4 bit mode ajay? http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 turker1 i selected intrc clkout. wihch setting i must enable?wdt,mclr, etc. http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 turker1 and i connected lcd.but in lcd screen (2x16) there are 16 small box. the program and connection true.my program: CODE:#if defined(__PCM__)
#include <16F628.h>
#use delay(clock=4000000)
#define use_portb_lcd TRUE //lcd bilgisi için port b'yi kullanıyoruz
#include <LCD.C>
int tamsayi=1; // tamsayi adında tamsayı tipinde bir değişken tanımlıyoruz ve değerini 1 olarak başlangıçta veriyoruz.
void main()
{
   lcd_init(); //lcd ekranımızı kuruyoruz
   printf(lcd_putc,”Cevizimiz:\n%d”,tamsayi); //Ekrana “Cevizimiz:” yazar ve alt satıra giderek sonuc değişkenini yazar.
   bas:
   goto bas;
} but didnt work. i select intrc clkout. what is problem?i cant connect to pc and cant working with lcd http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 Ajay you are using LCD in 4-bit mode.. and you did not specify it anywhere... http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 shyam hey are using an lcd library or have u made that lcd_init() by ur own??if u made it feel free to share with us we will not misuse it http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 Ajay looks like LCD is faulty.. first portion of pixels are not glowing properly... http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 turker1 CODE:#if defined(__PCM__)
#include <16F628.h>
#use delay(clock=4000000)
#fuses INTRC_IO,NOWDT,NOPROTECT,NOLVP,NOBROWNOUT
#define use_portb_lcd TRUE
#include <lcd.c>
void main()
{
   lcd_init();//ekranımızı kuruyoruz
   lcd_gotoxy(1,1);
   lcd_send_byte(1,65);
   for(;;)
   {}
}
 this is my code.Connection is above..It must display "A" but lcd display :what is the problem? http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 turker1 hey but it is new. i bought it 2 days ago and cant worked it. http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 Ajay this is so confusing!!may i see your LCD routines? http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 turker1 it is JHD 162A model.What is lcd routines? http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 Ajay I mean your LCD program.. where have you written your LCD program.. http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 Ajay where is the code? for LCD.. i mean i want to see that lcd.c file!!!! http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 turker1 in ccs c http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 turker1 install ccs c it is ccs c library. look google. every lcd project in ccs includes lcd.ci dont know its content http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 turker1 lcd.c uses 4 bit mode. but i think my lcd not working. because i download a hex file but didnt work.i 'll connect pic and pc.i havent done this yet http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 Ajay ok.. so how you define whether you are using LCD in 8-bit or 4-bit mode? there must be something where you tell your compiler which library to use for your LCD depending on mode of usage.. I think you need to find out how to do that.. or try if you can take a look at content of lcd.c it must be located somewhere in the include directory. http://www.8051projects.net/forum-t7175.html 2009-01-07T21:48:18-08:00 Ajay well as i looked from the pic you send of LCD it seems LCD is burnt.. still cant be sure of that but chances are there.. reason could be any..even a simple electrostatic discharge from human body can damage it