Hello All,


I try to make a simple Function Generator using (Oscillator,counter,AT28C16 EEPROM and a DAC)to generate(sine wave,saw tooth and a square wave).

I'm thinking of that

1-The frequency of the signal depends on the oscillator frequency

2-I'm going to use memory mapping so as to separate the memory into 3 parts one for each signal chape.

3-In each memory part of the 3 i'll feed the data like that :

Sine wave and sow tooth will be divided into 4 quarters (0-90,90-180,180-270,270-360) for each quarter i'll feed the data in EEPROM for example for saw tooth the first address will contain binary 1, the second contains binary 2 and so on.
For the second quarter the memory address will contain binary -1 then -2 and so on.

Square wave will be much smiple where 4 words contians zeros others ones and so on in third part of memory.

So is there anyone can suggest me for simple implementation of this,or there is in easier way to implement that?

Thanks all
Hatem Zakaria