PIC Micro Controller C Input / Output Routine

SPI Setup

by Peter Schutz

void init_spi_communication ( void )
 {
  TRISC4 = 1;   //SPI Slave In
  TRISC5 = 0;   //SPI Slave Out
  TRISC3 = 1;   //SPI Slave CLK In
  TRISA5 = 1;   //SPI SS Enabled In, used for other purpose then SPI
     SMP = 0;   //SPI slave mode
   SSPEN = 1;   //SPI port pins enabled
   SSPM0 = 0;   //Slave Mode SS pin Disabled
   SSPM1 = 0;
   SSPM2 = 1;
   SSPM3 = 0;
     CKP = 1;   //Clock idle is high
     CKE = 0;   //Data on rising edge
 }

void main ( void )
 {
  hardware_init();
  initialize ();
  init_spi_communication ();    // Initialization of SPI
  SSPBUF = 0x00;                        // Clear SPI receive buffer
  SSPIE = 1;                      // Enable interrupt on SPI receiving
  PEIE = 1;                             // Enable peripherial interrupt(For
SPI)
  ei();                         // Global interrupt enable
  asm("sleep");                 // Going to sleep
  while (1)
   ;
 }

Questions:

• Vinay of L&T asks: " I WANT TO USE RECEVIER IN INTERRUPT MODE AND RECEVIE VARIABLE LENGTH OF DATA CAN SOMEBODY SHARE SOME ROUTINES?"

Comments:

• TakeThisOuTlb07v at ecs.soton.ac.uk

  Hi there!
  It's my first time in PicList!I'm working now on PIC16F687 and I'm looking for some application examples to set up SPI slave mode. I found very helpful information, and I'll be happy to accept further tips about that! Great site! LucaB

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