| ??? 03/13/02 16:06 Read: times |
#20800 - RE: help lcd initialisation code |
Sorry about not providing enough information about lcd interfacing that i have actually done in my circuit. Please pardon me sir for the mistake . I also thank Hal albach for his invaluable guidance & now i have understood that i should be very clear in my queries. so here i am trying it. 1. i am using p89c51rd+ as microcontroller i am using lampex 16X1 lcd display. 2. lcd has three control pins RS ; to select data register or command register EN ; enable signal WR/RD; to select read or write RS connected to 3.2 WR/RD " 3.1 EN " 3.0 3. i am providing proper Vlcd i.e contrast voltage to lcd Also i have configured lcd to work in 5x7 character font 4. i am using p1 as data port 5. sir i have provided proper hookup to control pins. i.e. EA connected to +5v ( high) I have checked all MCU connections properly. 6. AND finally the result . THE result is that instead of the character i sent only dots are seen. i.e. 35 dots in place of each character, arranged in 5x7 format . this i get even if i power on only lcd & not MCU I hope i have cleared everything. & About answer from phillip Sir, Did you mean that i should make EN first low & then high ? |
| Topic | Author | Date |
| help lcd initialisation code | 01/01/70 00:00 | |
| RE: help lcd initialisation code | 01/01/70 00:00 | |
| RE: help lcd initialisation code | 01/01/70 00:00 | |
| RE: help lcd initialisation code | 01/01/70 00:00 | |
| RE: help lcd initialisation code | 01/01/70 00:00 | |
| RE: help lcd initialisation code | 01/01/70 00:00 | |
RE: help lcd initialisation code | 01/01/70 00:00 |



