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// Config Register: CONFIG1
#define CONFIG1 0x8007
// Oscillator Selection
// ECH, External Clock, High Power Mode (4-32 MHz): device clock supplied to CLKIN pin
#define FOSC_ECH 0xFFFF
// ECM, External Clock, Medium Power Mode (0.5-4 MHz): device clock supplied to CLKIN pin
#define FOSC_ECM 0xFFFE
// ECL, External Clock, Low Power Mode (0-0.5 MHz): device clock supplied to CLKIN pin
#define FOSC_ECL 0xFFFD
// INTOSC oscillator: I/O function on CLKIN pin
#define FOSC_INTOSC 0xFFFC
// EXTRC oscillator: External RC circuit connected to CLKIN pin
#define FOSC_EXTRC 0xFFFB
// HS Oscillator, High-speed crystal/resonator connected between OSC1 and OSC2 pins
#define FOSC_HS 0xFFFA
// XT Oscillator, Crystal/resonator connected between OSC1 and OSC2 pins
#define FOSC_XT 0xFFF9
// LP Oscillator, Low-power crystal connected between OSC1 and OSC2 pins
#define FOSC_LP 0xFFF8
// Watchdog Timer Enable
// WDT enabled
#define WDTE_ON 0xFFFF
// WDT enabled while running and disabled in Sleep
#define WDTE_NSLEEP 0xFFF7
// WDT controlled by the SWDTEN bit in the WDTCON register
#define WDTE_SWDTEN 0xFFEF
// WDT disabled
#define WDTE_OFF 0xFFE7
// Power-up Timer Enable
// PWRT disabled
#define PWRTE_OFF 0xFFFF
// PWRT enabled
#define PWRTE_ON 0xFFDF
// MCLR Pin Function Select
// MCLR/VPP pin function is MCLR
#define MCLRE_ON 0xFFFF
// MCLR/VPP pin function is digital input
#define MCLRE_OFF 0xFFBF
// Flash Program Memory Code Protection
// Program memory code protection is disabled
#define CP_OFF 0xFFFF
// Program memory code protection is enabled
#define CP_ON 0xFF7F
// Data Memory Code Protection
// Data memory code protection is disabled
#define CPD_OFF 0xFFFF
// Data memory code protection is enabled
#define CPD_ON 0xFEFF
// Brown-out Reset Enable
// Brown-out Reset enabled
#define BOREN_ON 0xFFFF
// Brown-out Reset enabled while running and disabled in Sleep
#define BOREN_NSLEEP 0xFDFF
// Brown-out Reset controlled by the SBOREN bit in the BORCON register
#define BOREN_SBODEN 0xFBFF
// Brown-out Reset disabled
#define BOREN_OFF 0xF9FF
// Clock Out Enable
// CLKOUT function is disabled. I/O or oscillator function on the CLKOUT pin
#define CLKOUTEN_OFF 0xFFFF
// CLKOUT function is enabled on the CLKOUT pin
#define CLKOUTEN_ON 0xF7FF
// Internal/External Switchover
// Internal/External Switchover mode is enabled
#define IESO_ON 0xFFFF
// Internal/External Switchover mode is disabled
#define IESO_OFF 0xEFFF
// Fail-Safe Clock Monitor Enable
// Fail-Safe Clock Monitor is enabled
#define FCMEN_ON 0xFFFF
// Fail-Safe Clock Monitor is disabled
#define FCMEN_OFF 0xDFFF
// Config Register: CONFIG2
#define CONFIG2 0x8008
// Flash Memory Self-Write Protection
// Write protection off
#define WRT_OFF 0xFFFF
// 000h to 1FFh write protected, 200h to 1FFFh may be modified by EECON control
#define WRT_BOOT 0xFFFE
// 000h to FFFh write protected, 1000h to 1FFFh may be modified by EECON control
#define WRT_HALF 0xFFFD
// 000h to 1FFFh write protected, no addresses may be modified by EECON control
#define WRT_ALL 0xFFFC
// Voltage Regulator Capacitor Enable
// All VCAP pin functionality is disabled
#define VCAPEN_OFF 0xFFFF
// VCAP functionality is enabled on RA6
#define VCAPEN_RA6 0xFFEF
// VCAP functionality is enabled on RA5
#define VCAPEN_RA5 0xFFDF
// VCAP functionality is enabled on RA0
#define VCAPEN_RA0 0xFFCF
// PLL Enable
// 4x PLL enabled
#define PLLEN_ON 0xFFFF
// 4x PLL disabled
#define PLLEN_OFF 0xFEFF
// Stack Overflow/Underflow Reset Enable
// Stack Overflow or Underflow will cause a Reset
#define STVREN_ON 0xFFFF
// Stack Overflow or Underflow will not cause a Reset
#define STVREN_OFF 0xFDFF
// Brown-out Reset Voltage Selection
// Brown-out Reset Voltage (VBOR) set to 1.9 V
#define BORV_19 0xFFFF
// Brown-out Reset Voltage (VBOR) set to 2.5 V
#define BORV_25 0xFBFF
// Low-Voltage Programming Enable
// Low-voltage programming enabled
#define LVP_ON 0xFFFF
// High-voltage on MCLR/VPP must be used for programming
#define LVP_OFF 0xDFFFvoid usart_puts(const char *s)
{
while(*s++ )
{
usart_putc (*s);
}
}#include <stdio.h> // sprintf() is in here
#include <stdlib.h> // string functios are in here
#include <htc.h> // You only need this for defines
#define _XTAL_FREQ 4000000
#define BAUD9600_16MHZ 103
#define BAUD9600_4MHZ 25
__CONFIG(0x2F84);
__CONFIG(0x1EFF);
unsigned char buffer[20];
void usart_init(void)
{
TRISC7 = 1; // both of these
TRISC6 = 1; // MUST be input
BRGH = 1;
SPBRG = BAUD9600_4MHZ; // 4mhz xtal 9600 BAUD
TXEN = 1;
CREN = 1;
SPEN = 1; // SPEN and CREN
}
void usart_putc(const char c)
{
while(!TXIF);
TXREG = c;
}
void usart_puts(unsigned char *s)
{
while(*s)
{
usart_putc (*s++);
}
}
void main()
{
OSCCON = 0x68; // THIS MUST BE SET
_nop();
_nop(); // Two clocks should do it
usart_init();
RCIE =1;
GIE = 1;
PEIE = 1;
sprintf(buffer,"TEST"); // Using a buffer so the USART
usart_puts(buffer); // can send the data as variable...
while(1);
}
