c_cpp SPIMasterμC

Posted 2021-05-14

/*
* File : newmain.c
* Author : Ligo George
* Company : electroSome
* Project : SPI Master Example
* Microcontroller : PIC 16F877A
* Created on April 15, 2017, 5:59 PM
*/

// PIC16F877A Configuration Bit Settings
// 'C' source line config statements

// #pragma config statements should precede project file includes.
// Use project enums instead of #define for ON and OFF.

// CONFIG
#pragma config FOSC = XT   // Oscillator Selection bits (XT oscillator)
#pragma config WDTE = OFF  // Watchdog Timer Enable bit (WDT disabled)
#pragma config PWRTE = OFF // Power-up Timer Enable bit (PWRT disabled)
#pragma config BOREN = OFF // Brown-out Reset Enable bit (BOR disabled)
#pragma config LVP = OFF   // Low-Voltage In-Circuit Serial Programming Enable bit
#pragma config CPD = OFF   // Data EEPROM Memory Code Protection bit
#pragma config WRT = OFF   // Flash Program Memory Write Enable bits
#pragma config CP = OFF    // Flash Program Memory Code Protection bit

#include <xc.h>
#include <pic16f877a.h>
#include "spi.h"

#define _XTAL_FREQ 8000000

void main()
{
  nRBPU = 0;    //Enable PORTB internal pull up resistor
  TRISB = 0xFF; //PORTB as input
  TRISD = 0x00; //PORTD as output
  PORTD = 0x00; //All LEDs OFF
  TRISC7 = 0;
  RC7 = 1;

  spiInit(SPI_MASTER_OSC_DIV4, SPI_DATA_SAMPLE_MIDDLE, SPI_CLOCK_IDLE_LOW, SPI_IDLE_2_ACTIVE);

  while(1)
  {
    RC7 = 0; //Slave Select
    __delay_ms(1);

    spiWrite(PORTB);
    PORTD = spiRead();

    __delay_ms(1);
    RC7 = 1; //Slave Deselect

    __delay_ms(100);
  }
}