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 "audio_queue.h" 00039 #include "somo_14d.h" 00040 #include "pic_serial.h" 00041 00043 uns8 audio_queue_fifo[AUDIO_QUEUE_FIFO_SIZE]; 00045 uns8 aq_start = 0; 00047 uns8 aq_end = 0; 00049 bit audio_playing = 0; 00050 00051 void audio_queue_add(uns8 phrase) { 00052 00053 uns8 aq_next; 00054 00055 if ((aq_end == aq_start) && // Nothing in the fifo 00056 (audio_playing == 0)) { // And txreg is empty 00057 00058 somo_14d_set_file_id(phrase); 00059 audio_playing = 1; 00060 } else { // Put it in the buffer 00061 aq_next = aq_end + 1; // Get next buffer position 00062 if (aq_next == AUDIO_QUEUE_FIFO_SIZE) { // If we're at the end 00063 aq_next = 0; // wrap to the beginning 00064 } 00065 if (aq_next == aq_start) { 00066 // we're full! 00067 return; // just forget it for now 00068 } 00069 00070 audio_queue_fifo[aq_end] = phrase; // put it in 00071 aq_end = aq_next; // move pointer along 00072 } 00073 } 00074 00081 void audio_queue_process() 00082 { 00083 uns8 aq_next; 00084 00085 if (aq_end == aq_start) { // anything in the fifo? 00086 //serial_print_str("End of queue\n"); 00087 audio_playing = 0; 00088 return; // nope 00089 } 00090 aq_next = aq_start + 1; // get next position 00091 if (aq_next == AUDIO_QUEUE_FIFO_SIZE) { // if we're at the end of the buffer 00092 aq_next = 0; // wrap to the beginning 00093 } 00094 if (aq_end == aq_next) { // if we've only got one character to send 00095 //?????clear_bit(pie1, TXIE); // then turn off interrupts 00096 } 00097 audio_playing = 1; 00098 00099 somo_14d_set_file_id(audio_queue_fifo[aq_start]); 00100 aq_start = aq_next; // move start position of fifo 00101 00102 } 00103 00104 00105 void audio_queue_clear() { 00106 // crit sec 00107 start_crit_sec(); 00108 aq_end = aq_start; 00109 if (audio_playing || somo_14d_is_busy()) { 00110 serial_print_str("<<BUSY>>"); 00111 delay_ms(10); 00112 somo_14d_stop(); 00113 while (somo_14d_is_busy()) {}; 00114 delay_ms(10); 00115 } 00116 audio_playing = 0; 00117 end_crit_sec(); 00118 // crit sec end 00119 } 00120 00121 uns8 audio_queue_empty() { 00122 return (audio_playing == 0); 00123 }