Bluetooth JPEG camera library with test program build over the the original library for LS-Y201 LinkSprite JPEG Camera
Dependents: JPEGCameraTest JPEGCamera_SIM808_STM32F401RE JPEGCamera_SIM808_MPU9150_STM32F401RE
JPEGCamera.cpp@0:4df5706ea8d9, 2014-10-13 (annotated)
- Committer:
- thesane
- Date:
- Mon Oct 13 20:54:24 2014 +0000
- Revision:
- 0:4df5706ea8d9
modify JPEG camera to send image over serial port/bluetooth module instead of writing it to USB drive
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
thesane | 0:4df5706ea8d9 | 1 | /* Arduino JPEGCamera Library |
thesane | 0:4df5706ea8d9 | 2 | * Copyright 2010 SparkFun Electronic |
thesane | 0:4df5706ea8d9 | 3 | * Written by Ryan Owens |
thesane | 0:4df5706ea8d9 | 4 | * Modified by arms22 |
thesane | 0:4df5706ea8d9 | 5 | * Ported to mbed by yamaguch |
thesane | 0:4df5706ea8d9 | 6 | * Modified by thesane |
thesane | 0:4df5706ea8d9 | 7 | */ |
thesane | 0:4df5706ea8d9 | 8 | |
thesane | 0:4df5706ea8d9 | 9 | #include "JPEGCamera.h" |
thesane | 0:4df5706ea8d9 | 10 | |
thesane | 0:4df5706ea8d9 | 11 | #define min(x, y) ((x) < (y)) ? (x) : (y) |
thesane | 0:4df5706ea8d9 | 12 | |
thesane | 0:4df5706ea8d9 | 13 | const int RESPONSE_TIMEOUT = 500; |
thesane | 0:4df5706ea8d9 | 14 | const int DATA_TIMEOUT = 1000; |
thesane | 0:4df5706ea8d9 | 15 | |
thesane | 0:4df5706ea8d9 | 16 | JPEGCamera::JPEGCamera(PinName tx, PinName rx) : Serial(tx, rx) { |
thesane | 0:4df5706ea8d9 | 17 | baud(38400); |
thesane | 0:4df5706ea8d9 | 18 | state = READY; |
thesane | 0:4df5706ea8d9 | 19 | } |
thesane | 0:4df5706ea8d9 | 20 | |
thesane | 0:4df5706ea8d9 | 21 | bool JPEGCamera::setPictureSize(JPEGCamera::PictureSize size, bool doReset) { |
thesane | 0:4df5706ea8d9 | 22 | char buf[9] = {0x56, 0x00, 0x31, 0x05, 0x04, 0x01, 0x00, 0x19, (char) size}; |
thesane | 0:4df5706ea8d9 | 23 | int ret = sendReceive(buf, sizeof buf, 5); |
thesane | 0:4df5706ea8d9 | 24 | |
thesane | 0:4df5706ea8d9 | 25 | if (ret == 5 && buf[0] == 0x76) { |
thesane | 0:4df5706ea8d9 | 26 | if (doReset) |
thesane | 0:4df5706ea8d9 | 27 | reset(); |
thesane | 0:4df5706ea8d9 | 28 | return true; |
thesane | 0:4df5706ea8d9 | 29 | } else |
thesane | 0:4df5706ea8d9 | 30 | return false; |
thesane | 0:4df5706ea8d9 | 31 | } |
thesane | 0:4df5706ea8d9 | 32 | |
thesane | 0:4df5706ea8d9 | 33 | bool JPEGCamera::isReady() { |
thesane | 0:4df5706ea8d9 | 34 | return state == READY; |
thesane | 0:4df5706ea8d9 | 35 | } |
thesane | 0:4df5706ea8d9 | 36 | |
thesane | 0:4df5706ea8d9 | 37 | bool JPEGCamera::isProcessing() { |
thesane | 0:4df5706ea8d9 | 38 | return state == PROCESSING; |
thesane | 0:4df5706ea8d9 | 39 | } |
thesane | 0:4df5706ea8d9 | 40 | |
thesane | 0:4df5706ea8d9 | 41 | bool JPEGCamera::takePicture() { |
thesane | 0:4df5706ea8d9 | 42 | if (state == READY) { |
thesane | 0:4df5706ea8d9 | 43 | if (takePicture_int()) { |
thesane | 0:4df5706ea8d9 | 44 | imageSize = getImageSize(); |
thesane | 0:4df5706ea8d9 | 45 | address = 0; |
thesane | 0:4df5706ea8d9 | 46 | state = PROCESSING; |
thesane | 0:4df5706ea8d9 | 47 | } else { |
thesane | 0:4df5706ea8d9 | 48 | state = ERROR; |
thesane | 0:4df5706ea8d9 | 49 | } |
thesane | 0:4df5706ea8d9 | 50 | |
thesane | 0:4df5706ea8d9 | 51 | } |
thesane | 0:4df5706ea8d9 | 52 | return state != ERROR; |
thesane | 0:4df5706ea8d9 | 53 | } |
thesane | 0:4df5706ea8d9 | 54 | |
thesane | 0:4df5706ea8d9 | 55 | bool JPEGCamera::processPicture(Serial &control) { |
thesane | 0:4df5706ea8d9 | 56 | if (state == PROCESSING) { |
thesane | 0:4df5706ea8d9 | 57 | if (address < imageSize) { |
thesane | 0:4df5706ea8d9 | 58 | char data[1024]; |
thesane | 0:4df5706ea8d9 | 59 | int size = readData(data, min(sizeof(data), imageSize - address), address); |
thesane | 0:4df5706ea8d9 | 60 | for(int i = 0;i<size;i++) |
thesane | 0:4df5706ea8d9 | 61 | control.putc(data[i]); |
thesane | 0:4df5706ea8d9 | 62 | address += size; |
thesane | 0:4df5706ea8d9 | 63 | if (address >= imageSize) { |
thesane | 0:4df5706ea8d9 | 64 | stopPictures(); |
thesane | 0:4df5706ea8d9 | 65 | wait(0.1); |
thesane | 0:4df5706ea8d9 | 66 | state = READY; |
thesane | 0:4df5706ea8d9 | 67 | } |
thesane | 0:4df5706ea8d9 | 68 | } |
thesane | 0:4df5706ea8d9 | 69 | } |
thesane | 0:4df5706ea8d9 | 70 | |
thesane | 0:4df5706ea8d9 | 71 | return state == PROCESSING || state == READY; |
thesane | 0:4df5706ea8d9 | 72 | } |
thesane | 0:4df5706ea8d9 | 73 | |
thesane | 0:4df5706ea8d9 | 74 | bool JPEGCamera::reset() { |
thesane | 0:4df5706ea8d9 | 75 | char buf[4] = {0x56, 0x00, 0x26, 0x00}; |
thesane | 0:4df5706ea8d9 | 76 | int ret = sendReceive(buf, sizeof buf, 4); |
thesane | 0:4df5706ea8d9 | 77 | if (ret == 4 && buf[0] == 0x76) { |
thesane | 0:4df5706ea8d9 | 78 | wait(4.0); |
thesane | 0:4df5706ea8d9 | 79 | state = READY; |
thesane | 0:4df5706ea8d9 | 80 | } else { |
thesane | 0:4df5706ea8d9 | 81 | state = ERROR; |
thesane | 0:4df5706ea8d9 | 82 | } |
thesane | 0:4df5706ea8d9 | 83 | return state == READY; |
thesane | 0:4df5706ea8d9 | 84 | } |
thesane | 0:4df5706ea8d9 | 85 | |
thesane | 0:4df5706ea8d9 | 86 | bool JPEGCamera::takePicture_int() { |
thesane | 0:4df5706ea8d9 | 87 | char buf[5] = {0x56, 0x00, 0x36, 0x01, 0x00}; |
thesane | 0:4df5706ea8d9 | 88 | int ret = sendReceive(buf, sizeof buf, 5); |
thesane | 0:4df5706ea8d9 | 89 | |
thesane | 0:4df5706ea8d9 | 90 | return ret == 5 && buf[0] == 0x76; |
thesane | 0:4df5706ea8d9 | 91 | } |
thesane | 0:4df5706ea8d9 | 92 | |
thesane | 0:4df5706ea8d9 | 93 | bool JPEGCamera::stopPictures() { |
thesane | 0:4df5706ea8d9 | 94 | char buf[5] = {0x56, 0x00, 0x36, 0x01, 0x03}; |
thesane | 0:4df5706ea8d9 | 95 | int ret = sendReceive(buf, sizeof buf, 5); |
thesane | 0:4df5706ea8d9 | 96 | |
thesane | 0:4df5706ea8d9 | 97 | return ret == 4 && buf[0] == 0x76; |
thesane | 0:4df5706ea8d9 | 98 | } |
thesane | 0:4df5706ea8d9 | 99 | |
thesane | 0:4df5706ea8d9 | 100 | int JPEGCamera::getImageSize() { |
thesane | 0:4df5706ea8d9 | 101 | char buf[9] = {0x56, 0x00, 0x34, 0x01, 0x00}; |
thesane | 0:4df5706ea8d9 | 102 | int ret = sendReceive(buf, sizeof buf, 9); |
thesane | 0:4df5706ea8d9 | 103 | |
thesane | 0:4df5706ea8d9 | 104 | //The size is in the last 2 characters of the response. |
thesane | 0:4df5706ea8d9 | 105 | return (ret == 9 && buf[0] == 0x76) ? (buf[7] << 8 | buf[8]) : 0; |
thesane | 0:4df5706ea8d9 | 106 | } |
thesane | 0:4df5706ea8d9 | 107 | |
thesane | 0:4df5706ea8d9 | 108 | int JPEGCamera::readData(char *dataBuf, int size, int address) { |
thesane | 0:4df5706ea8d9 | 109 | char buf[16] = {0x56, 0x00, 0x32, 0x0C, 0x00, 0x0A, 0x00, 0x00, |
thesane | 0:4df5706ea8d9 | 110 | address >> 8, address & 255, 0x00, 0x00, size >> 8, size & 255, 0x00, 0x0A |
thesane | 0:4df5706ea8d9 | 111 | }; |
thesane | 0:4df5706ea8d9 | 112 | int ret = sendReceive(buf, sizeof buf, 5); |
thesane | 0:4df5706ea8d9 | 113 | |
thesane | 0:4df5706ea8d9 | 114 | return (ret == 5 && buf[0] == 0x76) ? receive(dataBuf, size, DATA_TIMEOUT) : 0; |
thesane | 0:4df5706ea8d9 | 115 | } |
thesane | 0:4df5706ea8d9 | 116 | |
thesane | 0:4df5706ea8d9 | 117 | int JPEGCamera::sendReceive(char *buf, int sendSize, int receiveSize) { |
thesane | 0:4df5706ea8d9 | 118 | while (readable()) getc(); |
thesane | 0:4df5706ea8d9 | 119 | |
thesane | 0:4df5706ea8d9 | 120 | for (int i = 0; i < sendSize; i++) putc(buf[i]); |
thesane | 0:4df5706ea8d9 | 121 | |
thesane | 0:4df5706ea8d9 | 122 | return receive(buf, receiveSize, RESPONSE_TIMEOUT); |
thesane | 0:4df5706ea8d9 | 123 | } |
thesane | 0:4df5706ea8d9 | 124 | |
thesane | 0:4df5706ea8d9 | 125 | int JPEGCamera::receive(char *buf, int size, int timeout) { |
thesane | 0:4df5706ea8d9 | 126 | timer.start(); |
thesane | 0:4df5706ea8d9 | 127 | timer.reset(); |
thesane | 0:4df5706ea8d9 | 128 | |
thesane | 0:4df5706ea8d9 | 129 | int i = 0; |
thesane | 0:4df5706ea8d9 | 130 | while (i < size && timer.read_ms() < timeout) { |
thesane | 0:4df5706ea8d9 | 131 | if (readable()) |
thesane | 0:4df5706ea8d9 | 132 | buf[i++] = getc(); |
thesane | 0:4df5706ea8d9 | 133 | } |
thesane | 0:4df5706ea8d9 | 134 | |
thesane | 0:4df5706ea8d9 | 135 | return i; |
thesane | 0:4df5706ea8d9 | 136 | } |