Diff: CameraOV528.h

Revision:

0:3f9d7ef7266c

Child:

1:06afc809909b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CameraOV528.h	Fri Jul 07 16:52:18 2017 +0000
@@ -0,0 +1,107 @@
+/* Copyright (c) 2016 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MBED_CAMERAOV528_H
+#define MBED_CAMERAOV528_H
+
+#include "mbed.h"
+#include "rtos.h"
+
+class Camera {
+public:
+    Camera(void) {};
+    virtual ~Camera(void) {};
+    virtual void powerup(void) = 0;
+    virtual void powerdown(void) = 0;
+    virtual void take_picture(void) = 0;
+    virtual uint32_t get_picture_size(void) = 0;
+    virtual uint32_t read_picture_data(uint8_t *data, uint32_t size) = 0;
+};
+
+class CameraOV528 : public Camera {
+
+public:
+    enum Resolution {
+//        RES_80x60       = 0x01,   // Does not work
+        RES_160x120     = 0x03,
+        RES_320x240     = 0x05,
+        RES_640x480     = 0x07,
+    };
+
+    enum Format {
+//        FMT_2_BIT_GRAY_SCALE = 1, //Does not work
+//        FMT_4_BIT_GRAY_SCALE = 2,
+//        FMT_8_BIT_GRAY_SCALE = 3,
+//        FMT_2_BIT_COLOR = 5,
+//        FMT_16_BIT = 6,
+        FMT_JPEG = 7,
+    };
+
+    CameraOV528(PinName rx, PinName tx);
+    virtual ~CameraOV528(void);
+    virtual void powerup(void);
+    virtual void powerup(uint32_t baud);
+    virtual void powerdown(void);
+    virtual void take_picture(void);
+    virtual uint32_t get_picture_size(void);
+    virtual uint32_t read_picture_data(uint8_t *data, uint32_t size);
+
+    void set_resolution(Resolution resolution);
+    void set_format(Format format);
+    void set_baud(uint32_t baud);
+
+private:
+
+    bool _init_sequence();
+    void _set_baud(uint32_t baud);
+    void _set_package_size(uint32_t size);
+    void _set_fmt_and_res(Format fmt, Resolution res);
+    void _read_picture_block();
+
+    void _rx_irq(void);
+
+    bool _send(const uint8_t *data, uint32_t size, uint32_t timeout_ms=500);
+    uint32_t _read(uint8_t * data, uint32_t size, uint32_t timeout_ms=500);
+    void _flush_rx(void);
+
+    bool _send_cmd(uint8_t cmd, uint8_t p1=0, uint8_t p2=0, uint8_t p3=0, uint8_t p4=0);
+    void _send_ack(uint8_t p1, uint8_t p2, uint8_t p3, uint8_t p4);
+
+    RawSerial _serial;
+
+    bool _init_done;
+    Resolution _resolution;
+    Format _format;
+    uint32_t _baud;
+
+    Resolution _dev_resolution;
+    Format _dev_format;
+    uint32_t _dev_baud;
+
+    uint32_t picture_length;
+    uint32_t picture_data_id;
+    uint32_t picture_data_id_count;
+    uint8_t picture_buffer[128];
+    uint32_t picture_buffer_size_limit;
+    uint32_t picture_buffer_pos;
+    uint32_t picture_buffer_size;
+
+    uint8_t _read_buf[sizeof(picture_buffer) + 1];
+    uint32_t _read_buf_head;
+    uint32_t _read_buf_tail;
+    uint32_t _read_wake_pos;
+    Semaphore _read_sem;
+};
+
+#endif