Diff: MARMEX_VB.cpp

Revision:

0:c4d14dd5d479

Child:

1:b2324313d4da

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MARMEX_VB.cpp	Fri Jun 06 03:36:58 2014 +0000
@@ -0,0 +1,356 @@
+/** MARMEX_VB Camera control library
+ *
+ *  @class   MARMEX_VB
+ *  @version 0.1
+ *  @date    10-Jun-2014
+ *
+ *  Released under the Apache License, Version 2.0 : http://mbed.org/handbook/Apache-Licence
+ *
+ *  MARMEX_VB Camera control library for mbed
+ */
+
+#include    "mbed.h"
+#include    "MARMEX_VB.h"
+
+#define     SPI_FREQUENCY                   (12 * 1000 * 1000)
+
+MARMEX_VB::MARMEX_VB(
+    PinName SPI_mosi,
+    PinName SPI_miso,
+    PinName SPI_sck,
+    PinName SPI_cs,
+    PinName cam_reset,
+    PinName I2C_sda,
+    PinName I2C_scl
+) :
+    _spi( SPI_mosi, SPI_miso, SPI_sck ),
+    _cs( SPI_cs ),
+    _reset( cam_reset ),
+    _i2c( I2C_sda, I2C_scl )
+{
+#ifdef IGNORE_INITIALIZATION_ERROR
+    init();
+#else
+    if ( 0 != init() )
+        error( "camera initialization failed." );
+#endif
+}
+
+
+#define CAM_I2C_ADDR    0x42
+
+#define     COMMAND_WRITE                   0x00
+#define     COMMAND_READ                    0x80
+#define     COMMAND_ADDR_INCREMENT          0x20
+
+#define     MEMORY_ADDR_LOW__REGISTER       0x0
+#define     MEMORY_ADDR_MID__REGISTER       0x1
+#define     MEMORY_ADDR_HIGH_REGISTER       0x2
+#define     CAMERA_DATA_REGISTER            0x8
+#define     CONTROL_DATA_REGISTER           0x3
+#define     STATUS_REGISTER                 0x4
+
+#define     CONTROL__PAUSE_BUFFER_UPDATE    0x01
+#define     CONTROL__RESUME_BUFFER_UPDATE   0x00
+
+
+int MARMEX_VB::init( CameraResolution res )
+{
+#define     PARAM_NUM               99
+#define     RES_CHANGE_PARAM_NUM    12
+#define     RESET_PULSE_WIDTH       100     //  mili-seconds
+#define     RESET_RECOVERY_TIME     100     //  mili-seconds
+#define     COMMAND_INTERVAL        20      //  mili-seconds
+
+    char camera_register_setting[ PARAM_NUM ][ 2 ] = {
+        { 0x01, 0x40 }, { 0x02, 0x60 }, { 0x03, 0x02 }, { 0x0C, 0x0C },
+        { 0x0E, 0x61 }, { 0x0F, 0x4B }, { 0x11, 0x80 }, { 0x12, 0x04 },
+        { 0x15, 0x00 }, { 0x16, 0x02 }, { 0x17, 0x39 }, { 0x18, 0x03 },
+        { 0x19, 0x03 }, { 0x1A, 0x7B }, { 0x1E, 0x37 }, { 0x21, 0x02 },
+        { 0x22, 0x91 }, { 0x29, 0x07 }, { 0x32, 0x80 }, { 0x33, 0x0B },
+        { 0x34, 0x11 }, { 0x35, 0x0B }, { 0x37, 0x1D }, { 0x38, 0x71 },
+        { 0x39, 0x2A }, { 0x3B, 0x12 }, { 0x3C, 0x78 }, { 0x3D, 0xC3 },
+        { 0x3E, 0x11 }, { 0x3F, 0x00 }, { 0x40, 0xD0 }, { 0x41, 0x08 },
+        { 0x41, 0x38 }, { 0x43, 0x0A }, { 0x44, 0xF0 }, { 0x45, 0x34 },
+        { 0x46, 0x58 }, { 0x47, 0x28 }, { 0x48, 0x3A }, { 0x4B, 0x09 },
+        { 0x4C, 0x00 }, { 0x4D, 0x40 }, { 0x4E, 0x20 }, { 0x4F, 0x80 },
+        { 0x50, 0x80 }, { 0x51, 0x00 }, { 0x52, 0x22 }, { 0x53, 0x5E },
+        { 0x54, 0x80 }, { 0x56, 0x40 }, { 0x58, 0x9E }, { 0x59, 0x88 },
+        { 0x5A, 0x88 }, { 0x5B, 0x44 }, { 0x5C, 0x67 }, { 0x5D, 0x49 },
+        { 0x5E, 0x0E }, { 0x69, 0x00 }, { 0x6A, 0x40 }, { 0x6B, 0x0A },
+        { 0x6C, 0x0A }, { 0x6D, 0x55 }, { 0x6E, 0x11 }, { 0x6F, 0x9F },
+        { 0x70, 0x3A }, { 0x71, 0x35 }, { 0x72, 0x11 }, { 0x73, 0xF1 },
+        { 0x74, 0x10 }, { 0x75, 0x05 }, { 0x76, 0xE1 }, { 0x77, 0x01 },
+        { 0x78, 0x04 }, { 0x79, 0x01 }, { 0x8D, 0x4F }, { 0x8E, 0x00 },
+        { 0x8F, 0x00 }, { 0x90, 0x00 }, { 0x91, 0x00 }, { 0x96, 0x00 },
+        { 0x96, 0x00 }, { 0x97, 0x30 }, { 0x98, 0x20 }, { 0x99, 0x30 },
+        { 0x9A, 0x00 }, { 0x9A, 0x84 }, { 0x9B, 0x29 }, { 0x9C, 0x03 },
+        { 0x9D, 0x4C }, { 0x9E, 0x3F }, { 0xA2, 0x52 }, { 0xA4, 0x88 },
+        { 0xB0, 0x84 }, { 0xB1, 0x0C }, { 0xB2, 0x0E }, { 0xB3, 0x82 },
+        { 0xB8, 0x0A }, { 0xC8, 0xF0 }, { 0xC9, 0x60 },
+    };
+    const char  res_change_param[ 5 ][ RES_CHANGE_PARAM_NUM ] = {
+        { 0x17, 0x18, 0x32, 0x19, 0x1a, 0x03, 0x0c, 0x3e, 0x71, 0x72, 0x73, 0xa2 }, //  register addr
+        { 0x39, 0x03, 0x80, 0x03, 0x7b, 0x02, 0x0c, 0x11, 0x35, 0x11, 0xf1, 0x52 }, //  QSIF
+        { 0x13, 0x01, 0xb6, 0x02, 0x7a, 0x0a, 0x00, 0x00, 0x35, 0x11, 0xf0, 0x02 }, //  VGA
+        { 0x16, 0x04, 0x80, 0x02, 0x7a, 0x0a, 0x04, 0x19, 0x35, 0x11, 0xf1, 0x02 }, //  QVGA
+        { 0x16, 0x04, 0xa4, 0x02, 0x7a, 0x0a, 0x04, 0x1a, 0x35, 0x22, 0xf2, 0x02 }, //  QQVGA
+    };
+    const char camera_reset_command[] = { 0x12, 0x80 };
+
+    _read_order_change  = 0;
+
+    //  SPI settings
+
+    _cs     = 1;                        //  set ChipSelect signal HIGH
+    _spi.format( 8 );                   //  camera SPI : 8bits/transfer
+    _spi.frequency( SPI_FREQUENCY );    //  SPI frequency setting
+    _i2c.frequency( 400 * 1000 );
+
+    //  reset
+
+    _reset = 0;
+    wait_ms( RESET_PULSE_WIDTH );   //  assert RESET signal
+    _reset = 1;
+    wait_ms( RESET_RECOVERY_TIME ); //  deassert RESET signal
+
+    if ( 0 != (_error_state = _i2c.write( CAM_I2C_ADDR, camera_reset_command, 2 )) )
+        return _error_state;    //  return non-zero if I2C access failed
+
+    wait_ms( 100 ); //  reset (via I2C) recovery time
+
+    _horizontal_size    = QCIF_PIXEL_PER_LINE;
+    _vertical_size      = QCIF_LINE_PER_FRAME;
+
+#ifdef UNIFIED_RESOLUTION_CHANGE
+    if ( QCIF != res ) {
+        for ( int i = 0; i < RES_CHANGE_PARAM_NUM; i++ ) {
+            for ( int j = 0; j < PARAM_NUM; j++ ) {
+                if ( camera_register_setting[ j ][ 0 ] == res_change_param[ 0 ][ i ] ) {
+                    camera_register_setting[ j ][ 1 ]   = res_change_param[ res ][ i ];
+                }
+            }
+        }
+    }
+
+    switch ( res ) {
+        case QCIF:
+            _horizontal_size    = QCIF_PIXEL_PER_LINE;
+            _vertical_size      = QCIF_LINE_PER_FRAME;
+            break;
+        case VGA:
+            _horizontal_size    = VGA_PIXEL_PER_LINE;
+            _vertical_size      = VGA_LINE_PER_FRAME;
+            break;
+        case QVGA:
+            _horizontal_size    = VGA_PIXEL_PER_LINE / 2;
+            _vertical_size      = VGA_LINE_PER_FRAME / 2;
+            break;
+        case QQVGA:
+            _horizontal_size    = VGA_PIXEL_PER_LINE / 4;
+            _vertical_size      = VGA_LINE_PER_FRAME / 4;
+            break;
+    }
+#endif
+
+
+    for ( int i = 0; i < PARAM_NUM; i++ ) {
+        if ( 0 != (_error_state = _i2c.write( CAM_I2C_ADDR, camera_register_setting[ i ], 2 )) )
+            break;
+
+        wait_ms( COMMAND_INTERVAL );  //  camera register writing requires this interval
+    }
+
+#ifndef UNIFIED_RESOLUTION_CHANGE
+    if ( QCIF != res ) {
+        char    d[ 2 ];
+        for ( int i = 0; i < RES_CHANGE_PARAM_NUM; i++ ) {
+            d[ 0 ]  = res_change_param[  0  ][ i ];
+            d[ 1 ]  = res_change_param[ res ][ i ];
+
+            if ( 0 != (_error_state = _i2c.write( CAM_I2C_ADDR, d, 2 )) )
+                break;
+
+            wait_ms( COMMAND_INTERVAL );  //  camera register writing requires this interval
+        }
+    }
+
+    switch ( res ) {
+        case QCIF:
+            _horizontal_size    = QCIF_PIXEL_PER_LINE;
+            _vertical_size      = QCIF_LINE_PER_FRAME;
+            break;
+        case VGA:
+            _horizontal_size    = VGA_PIXEL_PER_LINE;
+            _vertical_size      = VGA_LINE_PER_FRAME;
+            break;
+        case QVGA:
+            _horizontal_size    = VGA_PIXEL_PER_LINE / 2;
+            _vertical_size      = VGA_LINE_PER_FRAME / 2;
+            break;
+        case QQVGA:
+            _horizontal_size    = VGA_PIXEL_PER_LINE / 4;
+            _vertical_size      = VGA_LINE_PER_FRAME / 4;
+            break;
+    }
+
+printf( "resolution : h,v = %d,%d\r\n", _horizontal_size, _vertical_size );
+#endif
+
+    return _error_state;    //  return non-zero if I2C access failed
+}
+
+void MARMEX_VB::colorbar( SwitchState sw )
+{
+    char    s[ 2 ];
+
+    s[ 0 ]  = 0x12;
+    s[ 1 ]  = sw ? 0x06 : 0x04;
+
+    _error_state = _i2c.write( CAM_I2C_ADDR, s, 2 );
+}
+
+int MARMEX_VB::get_horizontal_size( void )
+{
+    return _horizontal_size;    //  return last state of I2C access
+}
+
+int MARMEX_VB::get_vertical_size( void )
+{
+    return _vertical_size;    //  return last state of I2C access
+}
+
+int MARMEX_VB::ready( void )
+{
+    return _error_state;    //  return last state of I2C access
+}
+
+extern int read_order_change;
+
+void MARMEX_VB::read_a_line( short *p, int line_number, int x_offset, int n_of_pixels )
+{
+#if 0
+
+    char    tmp;
+
+    if ( line_number < 0 )
+        return;
+
+    //  set camera module's buffer address
+    set_address( line_number * get_horizontal_size() * BYTE_PER_PIXEL + x_offset * BYTE_PER_PIXEL );
+
+    //  put a read command, first return byte should be ignored
+    read_register( CAMERA_DATA_REGISTER );
+
+    for( int x = 0; x < n_of_pixels; x++ ) {
+        //  perform 2 bytes read. a pixel data is in RGB565 format (16bits)
+        tmp     = read_register( CAMERA_DATA_REGISTER );                //  read lower byte
+        *p++    = (read_register( CAMERA_DATA_REGISTER ) << 8) | tmp;   //  read upper byte
+    }
+
+#else
+
+
+    short    tmp;
+
+    if ( line_number < 0 )
+        return;
+
+    //  set camera module's buffer address
+    set_address( line_number * get_horizontal_size() * BYTE_PER_PIXEL + x_offset * BYTE_PER_PIXEL );
+
+    //  put a read command, first return byte should be ignored
+    read_register( CAMERA_DATA_REGISTER );
+
+
+    if ( _read_order_change ) {
+
+        read_register( CAMERA_DATA_REGISTER );
+
+        for( int x = 0; x < n_of_pixels; x++ ) {
+            //  perform 2 bytes read. a pixel data is in RGB565 format (16bits)
+            tmp     = read_register( CAMERA_DATA_REGISTER ) << 8;                //  read lower byte
+            *p++    = (read_register( CAMERA_DATA_REGISTER ) << 0) | tmp;   //  read upper byte
+        }
+
+    } else {
+
+        for( int x = 0; x < n_of_pixels; x++ ) {
+            //  perform 2 bytes read. a pixel data is in RGB565 format (16bits)
+            tmp     = read_register( CAMERA_DATA_REGISTER );                //  read lower byte
+            *p++    = (read_register( CAMERA_DATA_REGISTER ) << 8) | tmp;   //  read upper byte
+        }
+
+    }
+
+#endif
+}
+
+void MARMEX_VB::open_transfer( void )
+{
+    //  send command to pause the camera buffer update
+    write_register( CONTROL_DATA_REGISTER, CONTROL__PAUSE_BUFFER_UPDATE );
+
+    //  read status register (first return byte should be ignored)
+    read_register( STATUS_REGISTER );
+
+    //  wait until the status register become 0x51(ready to transfer data)
+    while ( 0x51 != read_register( STATUS_REGISTER ) )
+        ;
+}
+
+void MARMEX_VB::close_transfer( void )
+{
+    //  send command to resume the camera buffer update
+    write_register( CONTROL_DATA_REGISTER, CONTROL__RESUME_BUFFER_UPDATE );
+
+    //  read status register (first return byte should be ignored)
+    read_register( STATUS_REGISTER );
+
+    //  wait until the status register become 0x50(camera updating the buffer)
+    while ( 0x50 != read_register( STATUS_REGISTER ) )
+        ;
+}
+
+int MARMEX_VB::read_order_change( void )
+{
+    return ( _read_order_change = !_read_order_change );
+}
+
+void MARMEX_VB::set_address( int address )
+{
+    //  set memory address (3 bytes)
+
+    write_register( MEMORY_ADDR_LOW__REGISTER, (address >>  0) & 0xFF );
+    write_register( MEMORY_ADDR_MID__REGISTER, (address >>  8) & 0xFF );
+    write_register( MEMORY_ADDR_HIGH_REGISTER, (address >> 16) & 0xFF );
+}
+
+void MARMEX_VB::write_register( char reg, char value )
+{
+    //  camera register write
+
+    send_spi( COMMAND_WRITE | reg );    //  send command and register number
+    send_spi( value );                  //  send register value
+}
+
+int MARMEX_VB::read_register( char reg )
+{
+    //  camera register read
+    //  returning current data in SPI buffer (data returned by previous command)
+
+    return ( send_spi( COMMAND_READ | reg | ((reg == CAMERA_DATA_REGISTER) ? COMMAND_ADDR_INCREMENT : 0x00) ) );
+}
+
+int MARMEX_VB::send_spi( char data )
+{
+    int     tmp;
+
+    //  SPI access
+
+    _cs     = 0;
+    tmp     = _spi.write( data );
+    _cs     = 1;
+
+    return ( tmp );
+}