Mac Intel / ProjetMacIntel

Smart coffee machine with facial recognition and remote control

Dependencies:   Camera_LS_Y201 EthernetInterface EthernetNetIf HTTPClient SRF05 TextLCD mbed-rtos mbed-src

Camera_LS_Y201_RTOS/SerialBuffered.cpp@0:43669f623d43, 2014-01-15 (annotated)

Committer:
projetmacintel
Date:
Wed Jan 15 11:09:52 2014 +0000
Revision:
0:43669f623d43
dep?t final PAO Macintel

Who changed what in which revision?

UserRevisionLine numberNew contents of line
projetmacintel 0:43669f623d43 1 /**
projetmacintel 0:43669f623d43 2 * =============================================================================
projetmacintel 0:43669f623d43 3 * LS-Y201 device driver class (Version 0.0.1)
projetmacintel 0:43669f623d43 4 * Reference documents: LinkSprite JPEG Color Camera Serial UART Interface
projetmacintel 0:43669f623d43 5 * January 2010
projetmacintel 0:43669f623d43 6 * =============================================================================
projetmacintel 0:43669f623d43 7 * Copyright (c) 2010 Shinichiro Nakamura (CuBeatSystems)
projetmacintel 0:43669f623d43 8 *
projetmacintel 0:43669f623d43 9 * Permission is hereby granted, free of charge, to any person obtaining a copy
projetmacintel 0:43669f623d43 10 * of this software and associated documentation files (the "Software"), to deal
projetmacintel 0:43669f623d43 11 * in the Software without restriction, including without limitation the rights
projetmacintel 0:43669f623d43 12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
projetmacintel 0:43669f623d43 13 * copies of the Software, and to permit persons to whom the Software is
projetmacintel 0:43669f623d43 14 * furnished to do so, subject to the following conditions:
projetmacintel 0:43669f623d43 15 *
projetmacintel 0:43669f623d43 16 * The above copyright notice and this permission notice shall be included in
projetmacintel 0:43669f623d43 17 * all copies or substantial portions of the Software.
projetmacintel 0:43669f623d43 18 *
projetmacintel 0:43669f623d43 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
projetmacintel 0:43669f623d43 20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
projetmacintel 0:43669f623d43 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
projetmacintel 0:43669f623d43 22 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
projetmacintel 0:43669f623d43 23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
projetmacintel 0:43669f623d43 24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
projetmacintel 0:43669f623d43 25 * THE SOFTWARE.
projetmacintel 0:43669f623d43 26 * =============================================================================
projetmacintel 0:43669f623d43 27 */
projetmacintel 0:43669f623d43 28
projetmacintel 0:43669f623d43 29 #include <RawSerial.h>
projetmacintel 0:43669f623d43 30 #include "mbed.h"
projetmacintel 0:43669f623d43 31 #include "SerialBuffered.h"
projetmacintel 0:43669f623d43 32
projetmacintel 0:43669f623d43 33 /**
projetmacintel 0:43669f623d43 34 * Create a buffered serial class.
projetmacintel 0:43669f623d43 35 *
projetmacintel 0:43669f623d43 36 * @param tx A pin for transmit.
projetmacintel 0:43669f623d43 37 * @param rx A pin for receive.
projetmacintel 0:43669f623d43 38 */
projetmacintel 0:43669f623d43 39 SerialBuffered::SerialBuffered(PinName tx, PinName rx) : RawSerial(tx, rx) {
projetmacintel 0:43669f623d43 40 indexContentStart = 0;
projetmacintel 0:43669f623d43 41 indexContentEnd = 0;
projetmacintel 0:43669f623d43 42 timeout = 1;
projetmacintel 0:43669f623d43 43 attach(this, &SerialBuffered::handleInterrupt);
projetmacintel 0:43669f623d43 44 }
projetmacintel 0:43669f623d43 45
projetmacintel 0:43669f623d43 46 /**
projetmacintel 0:43669f623d43 47 * Destroy.
projetmacintel 0:43669f623d43 48 */
projetmacintel 0:43669f623d43 49 SerialBuffered::~SerialBuffered() {
projetmacintel 0:43669f623d43 50 }
projetmacintel 0:43669f623d43 51
projetmacintel 0:43669f623d43 52 /**
projetmacintel 0:43669f623d43 53 * Set timeout for getc().
projetmacintel 0:43669f623d43 54 *
projetmacintel 0:43669f623d43 55 * @param ms milliseconds. (-1:Disable timeout)
projetmacintel 0:43669f623d43 56 */
projetmacintel 0:43669f623d43 57 void SerialBuffered::setTimeout(int ms) {
projetmacintel 0:43669f623d43 58 timeout = ms;
projetmacintel 0:43669f623d43 59 }
projetmacintel 0:43669f623d43 60
projetmacintel 0:43669f623d43 61 /**
projetmacintel 0:43669f623d43 62 * Read requested bytes.
projetmacintel 0:43669f623d43 63 *
projetmacintel 0:43669f623d43 64 * @param bytes A pointer to a buffer.
projetmacintel 0:43669f623d43 65 * @param requested Length.
projetmacintel 0:43669f623d43 66 *
projetmacintel 0:43669f623d43 67 * @return Readed byte length.
projetmacintel 0:43669f623d43 68 */
projetmacintel 0:43669f623d43 69 size_t SerialBuffered::readBytes(uint8_t *bytes, size_t requested) {
projetmacintel 0:43669f623d43 70 int i = 0;
projetmacintel 0:43669f623d43 71 while (i < requested) {
projetmacintel 0:43669f623d43 72 int c = getc();
projetmacintel 0:43669f623d43 73 if (c < 0) {
projetmacintel 0:43669f623d43 74 break;
projetmacintel 0:43669f623d43 75 }
projetmacintel 0:43669f623d43 76 bytes[i] = c;
projetmacintel 0:43669f623d43 77 i++;
projetmacintel 0:43669f623d43 78 }
projetmacintel 0:43669f623d43 79 return i;
projetmacintel 0:43669f623d43 80 }
projetmacintel 0:43669f623d43 81
projetmacintel 0:43669f623d43 82 /**
projetmacintel 0:43669f623d43 83 * Get a character.
projetmacintel 0:43669f623d43 84 *
projetmacintel 0:43669f623d43 85 * @return A character. (-1:timeout)
projetmacintel 0:43669f623d43 86 */
projetmacintel 0:43669f623d43 87 int SerialBuffered::getc() {
projetmacintel 0:43669f623d43 88 timer.reset();
projetmacintel 0:43669f623d43 89 timer.start();
projetmacintel 0:43669f623d43 90 while (indexContentStart == indexContentEnd) {
projetmacintel 0:43669f623d43 91 wait_ms(1);
projetmacintel 0:43669f623d43 92 if ((timeout > 0) && (timer.read_ms() > timeout)) {
projetmacintel 0:43669f623d43 93 /*
projetmacintel 0:43669f623d43 94 * Timeout occured.
projetmacintel 0:43669f623d43 95 */
projetmacintel 0:43669f623d43 96 // printf("Timeout occured.\n");
projetmacintel 0:43669f623d43 97 return EOF;
projetmacintel 0:43669f623d43 98 }
projetmacintel 0:43669f623d43 99 }
projetmacintel 0:43669f623d43 100 timer.stop();
projetmacintel 0:43669f623d43 101
projetmacintel 0:43669f623d43 102 uint8_t result = buffer[indexContentStart++];
projetmacintel 0:43669f623d43 103 indexContentStart = indexContentStart % BUFFERSIZE;
projetmacintel 0:43669f623d43 104
projetmacintel 0:43669f623d43 105 return result;
projetmacintel 0:43669f623d43 106 }
projetmacintel 0:43669f623d43 107
projetmacintel 0:43669f623d43 108 /**
projetmacintel 0:43669f623d43 109 * Returns 1 if there is a character available to read, 0 otherwise.
projetmacintel 0:43669f623d43 110 */
projetmacintel 0:43669f623d43 111 int SerialBuffered::readable() {
projetmacintel 0:43669f623d43 112 return indexContentStart != indexContentEnd;
projetmacintel 0:43669f623d43 113 }
projetmacintel 0:43669f623d43 114
projetmacintel 0:43669f623d43 115 void SerialBuffered::handleInterrupt() {
projetmacintel 0:43669f623d43 116 while (RawSerial::readable()) {
projetmacintel 0:43669f623d43 117 if (indexContentStart == ((indexContentEnd + 1) % BUFFERSIZE)) {
projetmacintel 0:43669f623d43 118 /*
projetmacintel 0:43669f623d43 119 * Buffer overrun occured.
projetmacintel 0:43669f623d43 120 */
projetmacintel 0:43669f623d43 121 // printf("Buffer overrun occured.\n");
projetmacintel 0:43669f623d43 122 RawSerial::getc();
projetmacintel 0:43669f623d43 123 } else {
projetmacintel 0:43669f623d43 124 buffer[indexContentEnd++] = RawSerial::getc();
projetmacintel 0:43669f623d43 125 indexContentEnd = indexContentEnd % BUFFERSIZE;
projetmacintel 0:43669f623d43 126 }
projetmacintel 0:43669f623d43 127 }
projetmacintel 0:43669f623d43 128 }