Help with PIC16F84A for Beginners

[Em Jay]

hello

i am a beginner in pic16f84a
and i found it very exciting but there is a problem i need u to help me with


suppose that portb is input


how can i copy the input to all GPR register


and one more question
what is the best type of Microcontroler that got more instructio than pic1684a

i mean sqrt and dived and multiply


and thanks

 

[schip666!]

Yes, you should be able to read any port, or register, and write the value to any general register or memory location.

I suggest that you look into using C instead of assembly programming if you are just starting out. It'll be a lot easier to get a satisfying result...then you can dig into the assembler. In C one does something simple like RegisterX = PortB; In assembler it's a bunch of MOV's and bit tests...

I'm not sure that any of the 16F series PICs have MULtiply instructions. The 18F2450 does have an integer multiply, as do the ATMEGA 128 and MSP430 (I only know what I've used...). Higher level math is usually constructed from the simple operations so I don't think you'll find a Square Root instruction on any processor chip. You are also unlikely to find any Floating Point math on chips at this level -- but I could be wrong because I avoid FP whenever possible.

 

[Em Jay]

thanks man

i know that c is much easier but i don't have a choice it's my doctor order to start
with assembly to know exactly what is going on in the device

just to make the story of registers familiar
but

if u know any type
that has Multiply divide and sqrt

i will be very great full and a bout my question i did it

i copy the input to all GPR