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 #include "hc4led.h" 00037 #include "pic_serial.h" 00038 00039 void hc4led_setup() { 00040 spi_setup(); 00041 } 00042 00043 uns8 hc4led_convert(uns8 digit) { 00044 switch (digit) { 00045 case ' ': return 0; 00046 case '0': return 126; 00047 case '1': return 24; 00048 case '2': return 109; 00049 case '3': return 61; 00050 case '4': return 27; 00051 case '5': return 55; 00052 case '6': return 115; 00053 case '7': return 28; 00054 case '8': return 127; 00055 case '9': return 31+32; 00056 case '\'': return 15; 00057 } 00058 } 00059 00060 void hc4led_write_str(char *data) { 00061 00062 uns8 count, digit; 00063 char converted[5]; 00064 00065 count = 4; 00066 do { 00067 digit = data[count-1]; 00068 converted[count-1] = hc4led_convert(digit); 00069 count--; 00070 } while (count > 0); 00071 count = 4; 00072 do { 00073 digit = converted[count-1]; 00074 spi_write(digit); 00075 count--; 00076 } while (count > 0); 00077 00078 } 00079