I have a Keil C code for using 16x2 LCD in 4-bit mode. the code is working fine.........
Problem: If "RS", "E" control pins (on LCD) are on a different port than the Data port, the code works fine....... But if the Data and Control Pins are on the Same Port, there's nothing appearing on the LCD.
please suggest any reason (and remedy if possible) for this.........
Controller: P89V51RD2 80c51 core 8-bit CPU with 64KB Flash, 1Kb RAM from NXP(Philips). LCD Module: Hitachi HD44780 controller based 16x2 Alphanumeric Green Backlit LCD.
The instructions for posting source code really are quite clearly stated: www.danlhenry.com/.../keil_code.png well 'stated' but not 'read' or, at least not 'followed'
I'm perfectly calm, just want the OP to get help, which requires reading and following www.danlhenry.com/.../keil_code.png
Erik
Hmmm.... if your ability to judge "working code" is as good as your ability notice illegible source code, I think that assertion must be open to considerable doubt...