Mikrokontrolery PIC w praktycznych zastosowaniach - Helion

26 Mikrokontrolery PIC w praktycznych zastosowaniach
//RC oscillator
#define FOSC_EXTRC
0xFFFF
//HS oscillator
#define FOSC_HS
0xFFFE
//XT oscillator
#define FOSC_XT
0xFFFD
//LP oscillator
#define FOSC_LP
0xFFFC
//Watchdog Timer Enable bit
//WDT enabled
#define WDTE_ON
0xFFFF
//WDT disabled
#define WDTE_OFF
0xFFFB
//Power-up Timer Enable bit
//PWRT disabled
#define PWRTE_OFF
0xFFFF
//PWRT enabled
#define PWRTE_ON
0xFFF7
//Brown-out Reset Enable bit
//BOR enabled
#define BOREN_ON
0xFFFF
//BOR disabled
#define BOREN_OFF
0xFFBF
//Low-Voltage (Single-Supply) In-Circuit Serial Programming Enable bit
//RB3/PGM pin has PGM function; low-voltage programming enabled
#define LVP_ON
0xFFFF
//RB3 is digital I/O, HV on MCLR must be used for programming
#define LVP_OFF
0xFF7F
//Data EEPROM Memory Code Protection bit
//Data EEPROM code protection off
#define CPD_OFF
0xFFFF
//Data EEPROM code-protected
#define CPD_ON
0xFEFF
//Flash Program Memory Write Enable bits
//Write protection off; all program memory may be written to by EECON control
#define WRT_OFF
0xFFFF
//0000h to 00FFh write-protected; 0100h to 1FFFh may be written to by EECON control
#define WRT_256
0xFDFF
//0000h to 07FFh write-protected; 0800h to 1FFFh may be written to by EECON control
#define WRT_1FOURTH
0xFBFF
//0000h to 0FFFh write-protected; 1000h to 1FFFh may be written to by EECON control
#define WRT_HALF
0xF9FF
//In-Circuit Debugger Mode bit
//In-Circuit Debugger disabled, RB6 and RB7 are general purpose I/O pins
#define DEBUG_OFF
0xFFFF
//In-Circuit Debugger enabled, RB6 and RB7 are dedicated to the debugger
#define DEBUG_ON
0xF7FF
//Flash Program Memory Code Protection bit
//Code protection off
#define CP_OFF
0xFFFF
//All program memory code-protected
#define CP_ON
0xDFFF
Przy okazji rozszyfrujemy trzy skróty, bardzo czsto wystpujce w dokumentacji:
FOSC (Frequency of the device OSCillator) — czstotliwo oscylatora
podczonego do ukadu. W naszym przykadzie FOSC = 20 MHz.