Please help in PIC connection with eeprom

[Mohamedwaly]

Hello
i new in programming in PIC 16f84a and 16f877a
i use Flowcode 4.2
i have some questions:
1-How can i make SIN COS TAn equations in PIC?
2-in flowcode the max. size for external eeprom is 4096 byte , is this is the max. size can i use with pic or i can using larger that 4k?
3-how can i connect the EEprom and TX,RX of MAX232 to PIC (Wiring)?
4-as the following picture if i connect them as the next wiring that mean i will not using this pins of ports as output(LED)?

**broken link removed**

 

[doraemon]

Hello!

Sorry, I don't know about flowcode, but here are a few hints.

1. Making trigonometric function using a microcontroller (as any other chip)
can be done in 2 ways: using an approximation formula (e.g: cos(x) =
1 - x^2/2! + x^4/4! … etc..). The other way is to use a lookup table in memory,
which is probably what you intend to do, right?

2. If you use an external EEPROM, then you can use as much space as the
EEPROM. If you use a 24C128, then you can use 16kbytes.

3. Since you give a pointer to schematics in your question 4, then I don't
understand your question 3.

4. It's up to you to add leds if you want.

Dora.

 

[Mohamedwaly]

thank you too much.........................