Vishal Rai
/
JPEGCamera
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Fork of
JPEGCamera
by 
Hiroshi Yamaguchi
JPEGCamera.cpp@1:27417b6a951d, 2011-11-17 (annotated)
- Committer:
- yamaguch
- Date:
- Thu Nov 17 13:59:40 2011 +0000
- Revision:
- 1:27417b6a951d
- Parent:
- 0:974923b4db2d
- Child:
- 2:609037d25e10
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| yamaguch | 0:974923b4db2d | 1 | /* Arduino JPEGCamera Library |
| yamaguch | 0:974923b4db2d | 2 | * Copyright 2010 SparkFun Electronic |
| yamaguch | 0:974923b4db2d | 3 | * Written by Ryan Owens |
| yamaguch | 0:974923b4db2d | 4 | * Modified by arms22 |
| yamaguch | 0:974923b4db2d | 5 | * Ported to mbed by yamaguch |
| yamaguch | 0:974923b4db2d | 6 | */ |
| yamaguch | 0:974923b4db2d | 7 | |
| yamaguch | 0:974923b4db2d | 8 | #include "JPEGCamera.h" |
| yamaguch | 0:974923b4db2d | 9 | |
| yamaguch | 0:974923b4db2d | 10 | #define min(x, y) ((x) < (y)) ? (x) : (y) |
| yamaguch | 0:974923b4db2d | 11 | |
| yamaguch | 0:974923b4db2d | 12 | const int RESPONSE_TIMEOUT = 500; |
| yamaguch | 0:974923b4db2d | 13 | const int DATA_TIMEOUT = 1000; |
| yamaguch | 0:974923b4db2d | 14 | |
| yamaguch | 0:974923b4db2d | 15 | JPEGCamera::JPEGCamera(PinName tx, PinName rx) : Serial(tx, rx) { |
| yamaguch | 0:974923b4db2d | 16 | baud(38400); |
| yamaguch | 0:974923b4db2d | 17 | state = READY; |
| yamaguch | 0:974923b4db2d | 18 | } |
| yamaguch | 0:974923b4db2d | 19 | |
| yamaguch | 0:974923b4db2d | 20 | bool JPEGCamera::setPictureSize(JPEGCamera::PictureSize size, bool doReset) { |
| yamaguch | 0:974923b4db2d | 21 | char buf[9] = {0x56, 0x00, 0x31, 0x05, 0x04, 0x01, 0x00, 0x19, (char) size}; |
| yamaguch | 0:974923b4db2d | 22 | int ret = sendReceive(buf, sizeof buf, 5); |
| yamaguch | 0:974923b4db2d | 23 | |
| yamaguch | 0:974923b4db2d | 24 | if (ret == 5 && buf[0] == 0x76) { |
| yamaguch | 0:974923b4db2d | 25 | if (doReset) |
| yamaguch | 0:974923b4db2d | 26 | reset(); |
| yamaguch | 0:974923b4db2d | 27 | return true; |
| yamaguch | 0:974923b4db2d | 28 | } else |
| yamaguch | 0:974923b4db2d | 29 | return false; |
| yamaguch | 0:974923b4db2d | 30 | } |
| yamaguch | 0:974923b4db2d | 31 | |
| yamaguch | 0:974923b4db2d | 32 | bool JPEGCamera::isReady() { |
| yamaguch | 0:974923b4db2d | 33 | return state == READY; |
| yamaguch | 0:974923b4db2d | 34 | } |
| yamaguch | 0:974923b4db2d | 35 | |
| yamaguch | 0:974923b4db2d | 36 | bool JPEGCamera::isProcessing() { |
| yamaguch | 0:974923b4db2d | 37 | return state == PROCESSING; |
| yamaguch | 0:974923b4db2d | 38 | } |
| yamaguch | 0:974923b4db2d | 39 | |
| yamaguch | 0:974923b4db2d | 40 | bool JPEGCamera::takePicture(char *filename) { |
| yamaguch | 0:974923b4db2d | 41 | if (state == READY) { |
| yamaguch | 0:974923b4db2d | 42 | fp = fopen(filename, "wb"); |
| yamaguch | 0:974923b4db2d | 43 | if (fp != 0) { |
| yamaguch | 0:974923b4db2d | 44 | if (takePicture()) { |
| yamaguch | 0:974923b4db2d | 45 | imageSize = getImageSize(); |
| yamaguch | 0:974923b4db2d | 46 | address = 0; |
| yamaguch | 0:974923b4db2d | 47 | state = PROCESSING; |
| yamaguch | 0:974923b4db2d | 48 | } else { |
| yamaguch | 0:974923b4db2d | 49 | fclose(fp); |
| yamaguch | 0:974923b4db2d | 50 | printf("takePicture(%s) failed", filename); |
| yamaguch | 0:974923b4db2d | 51 | state = ERROR; |
| yamaguch | 0:974923b4db2d | 52 | } |
| yamaguch | 0:974923b4db2d | 53 | } else { |
| yamaguch | 0:974923b4db2d | 54 | printf("fopen() failed"); |
| yamaguch | 0:974923b4db2d | 55 | state = ERROR; |
| yamaguch | 0:974923b4db2d | 56 | } |
| yamaguch | 0:974923b4db2d | 57 | } |
| yamaguch | 0:974923b4db2d | 58 | return state != ERROR; |
| yamaguch | 0:974923b4db2d | 59 | } |
| yamaguch | 0:974923b4db2d | 60 | |
| yamaguch | 0:974923b4db2d | 61 | bool JPEGCamera::processPicture() { |
| yamaguch | 0:974923b4db2d | 62 | if (state == PROCESSING) { |
| yamaguch | 0:974923b4db2d | 63 | if (address < imageSize) { |
| yamaguch | 0:974923b4db2d | 64 | char data[1024]; |
| yamaguch | 0:974923b4db2d | 65 | int size = readData(data, min(sizeof(data), imageSize - address), address); |
| yamaguch | 0:974923b4db2d | 66 | int ret = fwrite(data, size, 1, fp); |
| yamaguch | 0:974923b4db2d | 67 | if (ret > 0) |
| yamaguch | 0:974923b4db2d | 68 | address += size; |
| yamaguch | 0:974923b4db2d | 69 | if (ret == 0 || address >= imageSize) { |
| yamaguch | 0:974923b4db2d | 70 | stopPictures(); |
| yamaguch | 0:974923b4db2d | 71 | fclose(fp); |
| yamaguch | 0:974923b4db2d | 72 | wait(0.1); // ???? |
| yamaguch | 0:974923b4db2d | 73 | state = ret > 0 ? READY : ERROR; |
| yamaguch | 0:974923b4db2d | 74 | } |
| yamaguch | 0:974923b4db2d | 75 | } |
| yamaguch | 0:974923b4db2d | 76 | } |
| yamaguch | 0:974923b4db2d | 77 | |
| yamaguch | 0:974923b4db2d | 78 | return state == PROCESSING || state == READY; |
| yamaguch | 0:974923b4db2d | 79 | } |
| yamaguch | 0:974923b4db2d | 80 | |
| yamaguch | 0:974923b4db2d | 81 | bool JPEGCamera::reset() { |
| yamaguch | 0:974923b4db2d | 82 | char buf[4] = {0x56, 0x00, 0x26, 0x00}; |
| yamaguch | 0:974923b4db2d | 83 | int ret = sendReceive(buf, sizeof buf, 4); |
| yamaguch | 0:974923b4db2d | 84 | if (ret == 4 && buf[0] == 0x76) { |
| yamaguch | 0:974923b4db2d | 85 | wait(4.0); |
| yamaguch | 0:974923b4db2d | 86 | state = READY; |
| yamaguch | 0:974923b4db2d | 87 | } else { |
| yamaguch | 0:974923b4db2d | 88 | state = ERROR; |
| yamaguch | 0:974923b4db2d | 89 | } |
| yamaguch | 0:974923b4db2d | 90 | return state == READY; |
| yamaguch | 0:974923b4db2d | 91 | } |
| yamaguch | 0:974923b4db2d | 92 | |
| yamaguch | 0:974923b4db2d | 93 | bool JPEGCamera::takePicture() { |
| yamaguch | 0:974923b4db2d | 94 | char buf[5] = {0x56, 0x00, 0x36, 0x01, 0x00}; |
| yamaguch | 0:974923b4db2d | 95 | int ret = sendReceive(buf, sizeof buf, 5); |
| yamaguch | 0:974923b4db2d | 96 | |
| yamaguch | 0:974923b4db2d | 97 | return ret == 5 && buf[0] == 0x76; |
| yamaguch | 0:974923b4db2d | 98 | } |
| yamaguch | 0:974923b4db2d | 99 | |
| yamaguch | 0:974923b4db2d | 100 | bool JPEGCamera::stopPictures() { |
| yamaguch | 0:974923b4db2d | 101 | char buf[5] = {0x56, 0x00, 0x36, 0x01, 0x03}; |
| yamaguch | 0:974923b4db2d | 102 | int ret = sendReceive(buf, sizeof buf, 5); |
| yamaguch | 0:974923b4db2d | 103 | |
| yamaguch | 0:974923b4db2d | 104 | return ret == 4 && buf[0] == 0x76; |
| yamaguch | 0:974923b4db2d | 105 | } |
| yamaguch | 0:974923b4db2d | 106 | |
| yamaguch | 0:974923b4db2d | 107 | int JPEGCamera::getImageSize() { |
| yamaguch | 0:974923b4db2d | 108 | char buf[9] = {0x56, 0x00, 0x34, 0x01, 0x00}; |
| yamaguch | 0:974923b4db2d | 109 | int ret = sendReceive(buf, sizeof buf, 9); |
| yamaguch | 0:974923b4db2d | 110 | |
| yamaguch | 0:974923b4db2d | 111 | //The size is in the last 2 characters of the response. |
| yamaguch | 0:974923b4db2d | 112 | return (ret == 9 && buf[0] == 0x76) ? (buf[7] << 8 | buf[8]) : 0; |
| yamaguch | 0:974923b4db2d | 113 | } |
| yamaguch | 0:974923b4db2d | 114 | |
| yamaguch | 0:974923b4db2d | 115 | int JPEGCamera::readData(char *dataBuf, int size, int address) { |
| yamaguch | 0:974923b4db2d | 116 | char buf[16] = {0x56, 0x00, 0x32, 0x0C, 0x00, 0x0A, 0x00, 0x00, |
| yamaguch | 0:974923b4db2d | 117 | address >> 8, address & 255, 0x00, 0x00, size >> 8, size & 255, 0x00, 0x0A |
| yamaguch | 0:974923b4db2d | 118 | }; |
| yamaguch | 0:974923b4db2d | 119 | int ret = sendReceive(buf, sizeof buf, 5); |
| yamaguch | 0:974923b4db2d | 120 | |
| yamaguch | 0:974923b4db2d | 121 | return (ret == 5 && buf[0] == 0x76) ? receive(dataBuf, size, DATA_TIMEOUT) : 0; |
| yamaguch | 0:974923b4db2d | 122 | } |
| yamaguch | 0:974923b4db2d | 123 | |
| yamaguch | 0:974923b4db2d | 124 | int JPEGCamera::sendReceive(char *buf, int sendSize, int receiveSize) { |
| yamaguch | 0:974923b4db2d | 125 | while (readable()) getc(); |
| yamaguch | 0:974923b4db2d | 126 | |
| yamaguch | 0:974923b4db2d | 127 | for (int i = 0; i < sendSize; i++) putc(buf[i]); |
| yamaguch | 0:974923b4db2d | 128 | |
| yamaguch | 0:974923b4db2d | 129 | return receive(buf, receiveSize, RESPONSE_TIMEOUT); |
| yamaguch | 0:974923b4db2d | 130 | } |
| yamaguch | 0:974923b4db2d | 131 | |
| yamaguch | 0:974923b4db2d | 132 | int JPEGCamera::receive(char *buf, int size, int timeout) { |
| yamaguch | 0:974923b4db2d | 133 | timer.start(); |
| yamaguch | 0:974923b4db2d | 134 | timer.reset(); |
| yamaguch | 0:974923b4db2d | 135 | |
| yamaguch | 0:974923b4db2d | 136 | int i = 0; |
| yamaguch | 0:974923b4db2d | 137 | while (i < size && timer.read_ms() < timeout) { |
| yamaguch | 0:974923b4db2d | 138 | if (readable()) |
| yamaguch | 0:974923b4db2d | 139 | buf[i++] = getc(); |
| yamaguch | 0:974923b4db2d | 140 | } |
| yamaguch | 0:974923b4db2d | 141 | |
| yamaguch | 0:974923b4db2d | 142 | return i; |
| yamaguch | 1:27417b6a951d | 143 | } |