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???
02/02/08 17:58
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 		 #150228 - d0-d3
Responding to: ???'s previous message
In 4bit mode, d0-d3 must be at allways at logic high!
My other display has this pins pulled and when I check it with a voltage meter they are at VCC(5v) while disconnected.

The display I'm currently using (CP1620F) has those pins at 3.5V while disconnected I guess its not enough since it didn't work. And when I tied those pins to VCC (5V) it works.

BTW I'm done writing the functions which will handle the LCD
if anyone intrested it support 8bit and 4bit mode:

lcd.h (header file):
http://rafb.net/p/QVuj8791.nln.html

main.c (example program):
http://rafb.net/p/mMZOiT88.nln.html
* Notice the required defines before including lcd.h


List of 44 messages in thread
TopicAuthorDate
LCD in 4Bit mode trouble            01/01/70 00:00      
   For a start            01/01/70 00:00      
   How to post source code            01/01/70 00:00      
   HD44780 in 4 bit mode timings            01/01/70 00:00      
      Thanks, but still doesnt work            01/01/70 00:00      
         Tied lines            01/01/70 00:00      
            RW line tied to GND            01/01/70 00:00      
               R/W is tied to ground by hardware            01/01/70 00:00      
               have a look at this in code library            01/01/70 00:00      
            It worked!            01/01/70 00:00      
               It worked!            01/01/70 00:00      
                  d0-d3            01/01/70 00:00      
                     d0-d3 I still insist they should be left open !            01/01/70 00:00      
                        Proof            01/01/70 00:00      
                           They already have internal pullups            01/01/70 00:00      
                              Where ?            01/01/70 00:00      
                                 Please find the " Pull-up MOS " in the datasheet            01/01/70 00:00      
                                    Thanks            01/01/70 00:00      
                        I never insisted ont tieing them            01/01/70 00:00      
   can\'t help it            01/01/70 00:00      
      Noritake            01/01/70 00:00      
         Noritake            01/01/70 00:00      
            'life' for as long as it lasts            01/01/70 00:00      
               Please provide the datasheet part info            01/01/70 00:00      
                  I do not have it            01/01/70 00:00      
   I never insisted ont tieing them            01/01/70 00:00      
      Powertip - pc1602f            01/01/70 00:00      
   2 more things            01/01/70 00:00      
   I am getting 50\'000Hrs , with 80Cd/m2 , they            01/01/70 00:00      
   I work in 4 bit mode            01/01/70 00:00      
      All that code reduces to:            01/01/70 00:00      
         Thanks by the code size reduction            01/01/70 00:00      
            Tools            01/01/70 00:00      
               sure, but why            01/01/70 00:00      
                  time for a new thread...            01/01/70 00:00      
            Free IDE            01/01/70 00:00      
               it does not make sense            01/01/70 00:00      
                  Ops,,, Topic changes!            01/01/70 00:00      
                     one thing at a time            01/01/70 00:00      
                        Why bin file and not hex directly            01/01/70 00:00      
                  re: it does not make sense            01/01/70 00:00      
                     it does not matter 'how long'            01/01/70 00:00      
                        Not recommending anything            01/01/70 00:00      
         The swap command should not exist !!?            01/01/70 00:00      

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