CameraOV528.h

00001 /* Copyright (c) 2016 ARM Limited
00002  *
00003  * Licensed under the Apache License, Version 2.0 (the "License");
00004  * you may not use this file except in compliance with the License.
00005  * You may obtain a copy of the License at
00006  *
00007  *     http://www.apache.org/licenses/LICENSE-2.0
00008  *
00009  * Unless required by applicable law or agreed to in writing, software
00010  * distributed under the License is distributed on an "AS IS" BASIS,
00011  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00012  * See the License for the specific language governing permissions and
00013  * limitations under the License.
00014  */
00015 #ifndef MBED_CAMERAOV528_H
00016 #define MBED_CAMERAOV528_H
00017 
00018 #include "mbed.h"
00019 #include "rtos.h"
00020 
00021 class Camera {
00022 public:
00023     Camera(void) {};
00024     virtual ~Camera(void) {};
00025     virtual int powerup(void) = 0;
00026     virtual int powerdown(void) = 0;
00027     virtual int take_picture(void) = 0;
00028     virtual uint32_t get_picture_size(void) = 0;
00029     virtual uint32_t read_picture_data(uint8_t *data, uint32_t size) = 0;
00030 };
00031 
00032 class CameraOV528 : public Camera {
00033 
00034 public:
00035     enum Resolution {
00036 //        RES_80x60       = 0x01,   // Does not work
00037         RES_160x120     = 0x03,
00038         RES_320x240     = 0x05,
00039         RES_640x480     = 0x07,
00040     };
00041 
00042     enum Format {
00043 //        FMT_2_BIT_GRAY_SCALE = 1, //Does not work
00044 //        FMT_4_BIT_GRAY_SCALE = 2,
00045 //        FMT_8_BIT_GRAY_SCALE = 3,
00046 //        FMT_2_BIT_COLOR = 5,
00047 //        FMT_16_BIT = 6,
00048         FMT_JPEG = 7,
00049     };
00050 
00051     CameraOV528(PinName rx, PinName tx);
00052     virtual ~CameraOV528(void);
00053     virtual int powerup(void);
00054     virtual int powerup(uint32_t baud);
00055     virtual int powerdown(void);
00056     virtual int take_picture(void);
00057     virtual uint32_t get_picture_size(void);
00058     virtual uint32_t read_picture_data(uint8_t *data, uint32_t size);
00059 
00060     void set_resolution(Resolution resolution);
00061     void set_format(Format format);
00062     void set_baud(uint32_t baud);
00063 
00064     void attach_debug_function(void (*func)(const char* fmt, ...));
00065     int camera_error(const char* message);
00066 
00067 private:
00068 
00069     bool _init_sequence();
00070     void _set_baud(uint32_t baud);
00071     void _set_package_size(uint32_t size);
00072     void _set_fmt_and_res(Format fmt, Resolution res);
00073     int _read_picture_block();
00074 
00075     void _rx_irq(void);
00076 
00077     bool _send(const uint8_t *data, uint32_t size, uint32_t timeout_ms=500);
00078     uint32_t _read(uint8_t * data, uint32_t size, uint32_t timeout_ms=500);
00079     void _flush_rx(void);
00080 
00081     bool _send_cmd(uint8_t cmd, uint8_t p1=0, uint8_t p2=0, uint8_t p3=0, uint8_t p4=0);
00082     void _send_ack(uint8_t p1, uint8_t p2, uint8_t p3, uint8_t p4);
00083 
00084     RawSerial _serial;
00085 
00086     bool _init_done;
00087     Resolution _resolution;
00088     Format _format;
00089     uint32_t _baud;
00090 
00091     Resolution _dev_resolution;
00092     Format _dev_format;
00093     uint32_t _dev_baud;
00094 
00095     uint32_t picture_length;
00096     uint32_t picture_data_id;
00097     uint32_t picture_data_id_count;
00098     uint8_t picture_buffer[128];
00099     uint32_t picture_buffer_size_limit;
00100     uint32_t picture_buffer_pos;
00101     uint32_t picture_buffer_size;
00102 
00103     uint8_t _read_buf[sizeof(picture_buffer) + 1];
00104     uint32_t _read_buf_head;
00105     uint32_t _read_buf_tail;
00106     uint32_t _read_wake_pos;
00107     Semaphore _read_sem;
00108 
00109     void (*log_func)(const char* fmt, ...);
00110 };
00111 
00112 #endif