SUPER BASIC C help plz

Makaram

Member

• Nov 20, 2011

• #1

Using MPLABS 8.8, Hitech C compiler, a pic16f84a and a pickit3
all I want to do is set a pin high so I can check if my whole setup is working before I really knuckle down and learn some C.
If i simply wanted to turn my RB3 pin high so i can attach a LED to check my whole system is working, what code would i use?
thanks !

 

Ian Rogers

User Extraordinaire

Forum Supporter

Most Helpful Member

• Nov 21, 2011

• #2

I have some basic C code that will do the task... I have ported Nigel's asm tutorials to C.

Just click the link in my signature and look at tutorial 1

 

DerStrom8

Super Moderator

• Nov 21, 2011

• #3

I suggest you read the datasheet for the '84A. You'll need to set the fuses first, include source files, etc before even being able to start coding. You'll also need to set it up for ICSP. From there, it's simply a matter of setting TRISB to output (At least RB3) and then writing a main loop. Turning the LED on is the easy part. There's a lot you need to do before you can start with that. The datasheet is very important.

Der Strom

 

Makaram

Member

• Nov 21, 2011

• #4

I just looked through the whole data sheet and if there is something on fuses out eludes me

 

Ian Rogers

User Extraordinaire

Forum Supporter

Most Helpful Member

• Nov 22, 2011

• #5

They are still called fuses..... In flash they are read / writeable... DS8 is talking about the config register it contains 'bits' (used to be fuses) that control the mode / operation of the device.

If you load tutorial 1 into MPLAB and change the second line '__config()' and change the value to 0x3ff1.. Remove the line 'CMCON0 = 7' this will revert the code to work with the 84a

 

Last edited: Nov 22, 2011

atferrari

Well-Known Member

Most Helpful Member

• Nov 22, 2011

• #6

He is asking...

He said: all I want to do is set a pin high.

Isn't he asking for an instruction in C to get that acomplished?

I am not C conversant.

Yes, he follows with: If i simply wanted to turn my RB3 pin high so i can attach a LED to check my whole system is working, what code would i use?

 

Last edited: Nov 22, 2011

Makaram

Member

• Nov 22, 2011

• #7

these tutorials are good, thanks for the help lads