5 * Copyright (C) 2013-06-11 K.Ohta <whatisthis.sowhat ai gmail.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2,
11 * or (at your option) any later version.
12 * This library / program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
15 * See the GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this library; see the file COPYING. If not, write to the
19 * Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
22 * As a special exception, if you link this(includeed from sdcc) library
23 * with other files, some of which are compiled with SDCC,
24 * to produce an executable, this library does not by itself cause
25 * the resulting executable to be covered by the GNU General Public License.
26 * This exception does not however invalidate any other reasons why
27 * the executable file might be covered by the GNU General Public License.
30 #include <pic18fregs.h> /* ONLY FOR PIC18x */
37 INTCON = INTCON & ~(_TMR0IF | _RBIF); // Enable tmr0 as interrupt and clear interrupt flags.
38 INTCON2 = ~_TMR0IP & _TMR0IP; // Interrupt is lower.
40 WDTCON = 1; // OK? WDT=Disabled.
50 void idle(unsigned int initial)
53 unsigned char contword;
58 osccon = osccon | _IDLEN;
61 INTCON |= _TMR0IE; // Enable tmr0 as interrupt and clear interrupt flags.
63 /* Set TMR0 for interrupt*/
64 /* Pre-scaler: 1/16, PSA=0(ON), TOSE=0, T0CS=0(INTERNAL), T08BIT=0(16bit), TMR0ON=1(START) */
65 contword = _T0PS0 | _T0PS1 | _T0PS2 | _TMR0ON; // Prescaler = 1:256.
66 //contword = _T0PS2 | _TMR0ON; // Pre-scakler is 1:32.
67 //TMR0H = initial >> 8;
69 TMR0L = initial & 0xff;
70 TMR0H = initial >> 8; // Write order : L->H
74 i = TMR0H << 8 + TMR0L; // Check if IDLE-Timer was elapsed.
75 } while(i < 3); // Dead area : 0-2.