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 00038 #include "pic_pwm.h" 00039 #include "config.h" 00040 00041 uns8 pwm_count; 00042 uns8 pwm_level[PWM_NUM_PINS]; 00043 00044 00045 void pwm_set_level(uns8 pwm_item, uns8 level) { 00046 00047 pwm_level[pwm_item] = level; 00048 } 00049 00050 uns8 pwm_get_level(uns8 pwm_item) { 00051 return pwm_level[pwm_item]; 00052 } 00053 00054 void pwm_set_transition(uns8 pwm_item, uns8 to_level, uns16 steps) { 00055 } 00056 00057 00058 void pwm_setup_io() { 00059 00060 make_output(PWM_PORT_0, PWM_PIN_0); 00061 #if PWM_NUM_PINS > 1 00062 make_output(PWM_PORT_1, PWM_PIN_1); 00063 #endif 00064 #if PWM_NUM_PINS > 2 00065 make_output(PWM_PORT_2, PWM_PIN_2); 00066 #endif 00067 00068 } 00069 00070 void pwm_handle() { 00071 uns8 count; 00072 00073 pwm_count++; 00074 00075 if (pwm_count == 0) { // Turn them all on 00076 set_pin(PWM_PORT_0, PWM_PIN_0); 00077 #if PWM_NUM_PINS > 1 00078 set_pin(PWM_PORT_1, PWM_PIN_1); 00079 #endif 00080 #if PWM_NUM_PINS > 2 00081 set_pin(PWM_PORT_2, PWM_PIN_2); 00082 #endif 00083 } 00084 if (pwm_level[0] == pwm_count) { 00085 clear_pin(PWM_PORT_0, PWM_PIN_0); 00086 } 00087 #if PWM_NUM_PINS > 1 00088 if (pwm_level[1] == pwm_count) { 00089 clear_pin(PWM_PORT_1, PWM_PIN_1); 00090 } 00091 #endif 00092 #if PWM_NUM_PINS > 2 00093 if (pwm_level[2] == pwm_count) { 00094 clear_pin(PWM_PORT_2, PWM_PIN_2); 00095 } 00096 #endif 00097 }