pic 18f458........LCD keypad interfacing

[NARENDRA1234]

we are interfacing 8 bit LCD and 4*4 keypad to PIC 18f458.its having in built 10 bit adc.so my doubt is ,whether its possible to read or to display data on 8 bit LCD from 10 bit ADC.I mean ADC is converting analog signal into 10 bit data as its a 10 bit ADC,so is it ok to use 8 bit LCS for this?Or its nothing to do with 10 bit ADC ....please help....:sad:

 

[babatundeawe]

from my understanding the resolution of your adc conversion does not have anything to do with how u drive the lcd. if u want to use 10bit adc and connect your lcd in 8bit mode no problem if it is in 4 bit mode no problem. the problem comes from hw u wqant the result from ur adc be displayed and u have to take care in when u are doing the justification from ur adc result. make sure ur variable are within the scope of the vaues you are going to get. dont use a byte when u re going to be displaying decimal (floating) result. hope dis help?

 

[babatundeawe]

yes it is possible the 10bit adc is the resolution of adc conversion it is independent of the lcd connection interface. you can either us e the 4bit databus(d4-d7) connection mode if u want to save pins usage on micro or u use the eight data bus(d0-d8) if u have enuf pins to play with. what matter most hw u justify ur adc result and selecting variables that are needed. dont use a byte when u need to display results that require a decimal point(float) after the significant figures. and dont allocate variable anyhow so dt u dont consume the memory in your micro