00001 /* 00002 00003 Copyright (c) 2010, Embedded Adventures, www.embeddedadventures.com 00004 All rights reserved. 00005 00006 Redistribution and use in source and binary forms, with or without 00007 modification, are permitted provided that the following conditions are met: 00008 00009 - Redistributions of source code must retain the above copyright notice, 00010 this list of conditions and the following disclaimer. 00011 00012 - Redistributions in binary form must reproduce the above copyright 00013 notice, this list of conditions and the following disclaimer in the 00014 documentation and/or other materials provided with the distribution. 00015 00016 - Neither the name of Embedded Adventures nor the names of its contributors 00017 may be used to endorse or promote products derived from this software 00018 without specific prior written permission. 00019 00020 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 00021 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00022 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00023 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 00024 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 00025 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 00026 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00027 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 00028 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 00029 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 00030 THE POSSIBILITY OF SUCH DAMAGE. 00031 00032 Contact us at admin@embeddedadventures.com 00033 00034 */ 00035 00036 00037 #include "pic_timer1.h" 00038 00039 00040 uns16 timer_1_start_value = 0; 00041 00042 00043 void timer_setup_1(uns8 prescaler_setting, uns16 timer_start_value) { 00044 00045 clear_bit(t1con, TMR1ON); // turn off timer if it was on so we can get it set up 00046 clear_bit(t1con, TMR1CS); // Internal instruction cycle clock 00047 #ifdef _PIC18 00048 set_bit(t1con, RD16); 00049 #endif 00050 t1con &= 0b11001111; 00051 t1con |= prescaler_setting; 00052 timer_1_start_value = timer_start_value; 00053 set_bit(pie1, TMR1IE); // Turn on timer 0 interrupts 00054 } 00055 00056 void timer_start_1() { 00057 tmr1h = timer_1_start_value >> 8; 00058 tmr1l = timer_1_start_value & 0xff; 00059 set_bit(t1con, TMR1ON); 00060 } 00061 00062 00063 void timer_stop_1() { 00064 clear_bit(t1con, TMR1ON); 00065 } 00066 00067