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.
31 #include <pic18fregs.h> /* ONLY FOR PIC18x */
42 INTCONbits.TMR0IF = 0;
44 INTCON2bits.TMR0IP = 0;
45 // INTCON = INTCON & ~(_TMR0IF | _RBIF); // Enable tmr0 as interrupt and clear interrupt flags.
46 // INTCON2 = ~_TMR0IP & _TMR0IP; // Interrupt is lower.
48 INTCON = INTCON & ~(_INTCON_TMR0IF_MASK | _INTCON_RBIF_MASK); // Enable tmr0 as interrupt and clear interrupt flags.
49 INTCON2bits.TMR0IP = 0; // Interrupt is lower.
51 WDTCON = 1; // OK? WDT=Disabled.
61 void idle(unsigned int initial)
63 // unsigned char osccon;
64 unsigned char contword;
68 WDTCONbits.SWDTEN = 0; // Lame WDT OFF.
71 INTCONbits.TMR0IF = 0;
72 INTCONbits.TMR0IE = 1; // Enable tmr0 as interrupt and clear interrupt flags.
73 /* Set TMR0 for interrupt*/
74 /* Pre-scaler: 1/16, PSA=0(ON), TOSE=0, T0CS=0(INTERNAL), T08BIT=0(16bit), TMR0ON=1(START) */
79 // contword = _T0PS0 | _T0PS1 | _T0PS2 | _TMR0ON; // Prescaler = 1:256.
81 contword = _T0CON_T0PS0_MASK | _T0CON_T0PS1_MASK | _T0CON_T0PS2_MASK | _T0CON_TMR0ON_MASK; // Prescaler = 1:256.
82 #endif //contword = _T0PS2 | _TMR0ON; // Pre-scakler is 1:32.
83 //TMR0H = initial >> 8;
85 TMR0L = initial & 0xff;
86 TMR0H = initial >> 8; // Write order : L->H
87 T0CONbits.TMR0ON = 1; // Start
90 // i = TMR0H << 8 + TMR0L; // Check if IDLE-Timer was elapsed.
91 // } while(i < 3); // Dead area : 0-2.
92 WDTCONbits.SWDTEN = 1; // WDT ON.
96 void idle_time_ms(unsigned int ms)
102 upper = (ms & 0xe000) >> 13;
103 // unsigned int upper;
104 tim = ms << 3 - ms >> 4 - ms >>3;
105 tim = 65535 - tim + 1; // tim = 65536 - tim;
107 idle(0x0000); // Upper is 65536 tick.
112 void idle_time_62_5ms(void)
114 // Tim = 1ms * 64 - 1ms - 0.5ms
115 // Tim = 0.128ms * (488 + 2.2)
117 idle(65535 - 488 + 4);
120 void idle_time_35ms(void)
122 // Tim = 35 / 0.128 = 273.44
123 idle(65535 - 274 + 1);