hello everybody, i need ur help
i want to design a digital ampere hour meter using AT89S8252 micro contr. but the prib is with prog, iam unable to write the prog.iam new to programming .this is my first project

the features i require in my ckt are...

i use a shunt to convert the currr, to voltage, next amplify it, intergrate it , conv the volt into freq using LM311 , then feed this to the timer 1 iof the microcontroller . then count the freq and then cal. the volt and then the actual current. next we have to display the data on the 16*2 lcd screen.

the features we need in the lcd is we have to use a key pad which has 4 keys
1. menu which has 2 functions change the resolutions (decimal point, shunt value(range ).
2. enter
3.exit.

the prob is in programming this .

please help me with this code. better if it is in c language.
if not atlease help me with the code for lcd display and the key pad circuit with the above mentioned features.

please help . waiting for ur hearty reply.