MODIFIED BY FEVZI YAZGAN BOUDRATE AND IMAGESIZE FUNCTION ADDED ALSO IT SENDS THE IMAGE AT ONE TIME TO THE MBED. SO IT IS FASTER TO SEND IMAGE AT A ONE TIME:)
Dependents: 10_Camera_LS_Y201_TestProgram
SerialBuffered.cpp
00001 /** 00002 * ============================================================================= 00003 * LS-Y201 device driver class (Version 0.0.1) 00004 * Reference documents: LinkSprite JPEG Color Camera Serial UART Interface 00005 * January 2010 00006 * ============================================================================= 00007 * Copyright (c) 2010 Shinichiro Nakamura (CuBeatSystems) 00008 * 00009 * Permission is hereby granted, free of charge, to any person obtaining a copy 00010 * of this software and associated documentation files (the "Software"), to deal 00011 * in the Software without restriction, including without limitation the rights 00012 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 00013 * copies of the Software, and to permit persons to whom the Software is 00014 * furnished to do so, subject to the following conditions: 00015 * 00016 * The above copyright notice and this permission notice shall be included in 00017 * all copies or substantial portions of the Software. 00018 * 00019 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 00020 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 00021 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 00022 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 00023 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 00024 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 00025 * THE SOFTWARE. 00026 * ============================================================================= 00027 */ 00028 00029 #include "mbed.h" 00030 #include "SerialBuffered.h" 00031 00032 /** 00033 * Create a buffered serial class. 00034 * 00035 * @param tx A pin for transmit. 00036 * @param rx A pin for receive. 00037 */ 00038 SerialBuffered::SerialBuffered(PinName tx, PinName rx) : Serial(tx, rx) { 00039 indexContentStart = 0; 00040 indexContentEnd = 0; 00041 timeout = 1; 00042 attach(this, &SerialBuffered::handleInterrupt); 00043 } 00044 00045 /** 00046 * Destroy. 00047 */ 00048 SerialBuffered::~SerialBuffered() { 00049 } 00050 00051 /** 00052 * Set timeout for getc(). 00053 * 00054 * @param ms milliseconds. (-1:Disable timeout) 00055 */ 00056 void SerialBuffered::setTimeout(int ms) { 00057 timeout = ms; 00058 } 00059 00060 /** 00061 * Read requested bytes. 00062 * 00063 * @param bytes A pointer to a buffer. 00064 * @param requested Length. 00065 * 00066 * @return Readed byte length. 00067 */ 00068 size_t SerialBuffered::readBytes(uint8_t *bytes, size_t requested) { 00069 int i = 0; 00070 while (i < requested) { 00071 int c = getc(); 00072 if (c < 0) { 00073 break; 00074 } 00075 bytes[i] = c; 00076 i++; 00077 } 00078 return i; 00079 } 00080 00081 /** 00082 * Get a character. 00083 * 00084 * @return A character. (-1:timeout) 00085 */ 00086 int SerialBuffered::getc() { 00087 timer.reset(); 00088 timer.start(); 00089 while (indexContentStart == indexContentEnd) { 00090 wait_ms(1); 00091 if ((timeout > 0) && (timer.read_ms() > timeout)) { 00092 /* 00093 * Timeout occured. 00094 */ 00095 // printf("Timeout occured.\n"); 00096 return EOF; 00097 } 00098 } 00099 timer.stop(); 00100 00101 uint8_t result = buffer[indexContentStart++]; 00102 indexContentStart = indexContentStart % BUFFERSIZE; 00103 00104 return result; 00105 } 00106 00107 /** 00108 * Returns 1 if there is a character available to read, 0 otherwise. 00109 */ 00110 int SerialBuffered::readable() { 00111 return indexContentStart != indexContentEnd; 00112 } 00113 00114 void SerialBuffered::handleInterrupt() { 00115 while (Serial::readable()) { 00116 if (indexContentStart == ((indexContentEnd + 1) % BUFFERSIZE)) { 00117 /* 00118 * Buffer overrun occured. 00119 */ 00120 // printf("Buffer overrun occured.\n"); 00121 Serial::getc(); 00122 } else { 00123 buffer[indexContentEnd++] = Serial::getc(); 00124 indexContentEnd = indexContentEnd % BUFFERSIZE; 00125 } 00126 } 00127 }
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