Pickit2 UART Frage

#include <pic.h>

#include <stdlib.h>

#include <stdio.h>

/*   PIC Configuration Bit:

**   INTIO     - Using Internal RC No Clock

**   WDTDIS    - Wacthdog Timer Disable

**   PWRTEN    - Power Up Timer Enable

**   MCLREN    - Master Clear Enable

**   UNPROTECT - Code Un-Protect

**   UNPROTECT - Data EEPROM Read Un-Protect

**   BORDIS    - Borwn Out Detect Disable

**   IESODIS   - Internal External Switch Over Mode Disable

**   FCMDIS    - Monitor Clock Fail Safe Disable

*/

__CONFIG(INTIO & WDTDIS & PWRTEN & MCLREN & UNPROTECT \

  & UNPROTECT & BORDIS & IESODIS & FCMDIS);

// Using Internal Clock of 8 MHz

#define FOSC 8000000L

#define BAUD_RATE 9600

// Delay Function

#define  _delay_us(x) { unsigned char us; \

               us = (x)/(12000000/FOSC)|1; \

               while(--us != 0) continue; }

void _delay_ms(unsigned int ms)

{

  unsigned char i;

  do {

    i = 4;

    do {

      _delay_us(164);

    } while(--i);

  } while(--ms);

}

// BRAM UART Debugging Function

void ansi_cl(void)

{

  // ANSI clear screen: cl=\E[H\E[J

  putchar(27);

  putchar('[');

  putchar('H');

  putchar(27);

  putchar('[');

  putchar('J');

}

void ansi_me(void)

{

  // ANSI turn off all attribute: me=\E[0m

  putchar(27);

  putchar('[');

  putchar('0');

  putchar('m');

}

void uart_init(void)

{

  TRISB5 = 1;          // Set Port B5 and B7 for UART Tx and Rx

  TRISB7 = 0;

  // Baud Rate formula for SYNC=0 (Async), BRG16=0 (8-bit), BRGH=0 (low speed)

  // 0.16% Error for 8 MHz Oscilator Clock. Actual Rate will be 9615.

  // BAUD_RATE = FOSC / (64 x (SPBRG + 1)) 

  SPBRG = (int)(FOSC/(64UL * BAUD_RATE) - 1);

  TXSTA = 0b00100000;  // Async, 8 bit and Enable Transmit (TXEN=1)

  RCSTA = 0b10010000;  // Serial Port Enable, Async,8-bit and Enable Receipt (CREN=1)

  BAUDCTL=0;

}

void putch(unsigned char data)

{

  // Send Data when TXIF bit is ready

  while(!TXIF) continue;

  TXREG = data;

}

unsigned char getch(void) {

  // Get Data when RCIF bit is ready

  while(!RCIF) continue;

  return RCREG;

}

void main(void)

{

  ansi_me();

  ansi_cl();

while (1)

 {

  OSCCON=0x70;         // Select 8 MHz internal clock

  TRISA = 0x03;        // Input for RA0 and RA1

  TRISC = 0x07;        // Set RC0,RC1 and RC2 as input others as Output

  ANSEL = 0x71;        // Set PORT AN0, AN4, AN5 and AN6 as analog input

  ANSELH = 0x00;       // Set PORT AN8 to AN11 as Digital I/O

  PORTC = 0x00;        // Turn Off all PORTC

  // Initial PIC16F690 UART

  uart_init();

  // Set the Attribute and Clear Screen

  printf("Welcome");

  putch("a");

}

}