Wanna some tutorials on spi

H

hayee

New Member

• Feb 14, 2008

• #1

Hi everyone,
i want some tutorials on spi in C.i am using two pic16f877a controllers.any simple tutorials like blinking leds.i have no concept of spi.please help me out if u guys have any information.
Thanx

 

E

eng1

New Member

• Feb 14, 2008

• #2

This is a Micorchip reference. It's in assembler but it's a good overview on the SPI interface of PICs. If you understand how SPI works, it should be trivial to re-write the routines in C.

 

Last edited: Feb 14, 2008

H

hayee

New Member

• Feb 14, 2008

• #3

Thankx eng1.
I have already seen that file but i cant understand this.plz give me other links that r in C.i have no knowledge of assembly

 

simrantogether

Member

• Feb 14, 2008

• #4

Well...

Hi,

Simple...

https://www.best-microcontroller-projects.com/spi-interface.html

Regards,

Simran..

 

F

firewater

New Member

• Feb 16, 2008

• #5

Yes, there seams to be a lack of actual example code for SPI and if you can find some it's usually in asm. Here a some code written in C for Atmel.If anyone knows of more please share.
https://books.google.com/books?id=0vm-gb63qOEC&pg=PA403&lpg=PA403&dq=atmel+%22spi+h%22&source=web&ots=jS1p0L7wiv&sig=27vnML24qF1BAetJyd2dEObO3O0#PPA403,M1

 

P

Pommie

Well-Known Member

Most Helpful Member

• Feb 16, 2008

• #6

Here's the Master asm code (page 32 of this) in C18.

Code:

void main(){
unsigned char Count=0;
unsigned char Dummy;
    TRISA=0;
    ADCON1=0x06;
    TRISC=0x10;
    SSPSTAT=0x40;
    SSPCON=0x31;
    while(1){
        LATAbits.LATA2=1;
        SSPBUF=Count++;
        while(!SSPSTATbits.BF);
        Dummy=SSPBUF;
        LATAbits.LATA2=0;
        DelaymS(100);
    }
}

By comparing the two, you should be able to convert the slave code as well.

Mike.

 

M

MrNobody

New Member

• Feb 17, 2008

• #7

hayee said:

Hi everyone,
i want some tutorials on spi in C.i am using two pic16f877a controllers.any simple tutorials like blinking leds.i have no concept of spi.please help me out if u guys have any information.
Thanx

Click to expand...

Here is a link for **broken link removed**.. It covers nearly everything to do with PIC programming, from turning ON and OFF LED to UART to SPI to LCD and others..

Hope that helps..