Tedd OKANO / MARY_CAMERA

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MARY_CAMERA.h@4:cb0ef3fd89c9, 2014-02-17 (annotated)

Committer:
okano
Date:
Mon Feb 17 23:44:08 2014 +0000
Revision:
4:cb0ef3fd89c9
Parent:
3:e5752853eb26
Child:
5:960221bde814
Child:
7:942d8d0a1760
add comments, cleaned-up

Who changed what in which revision?

UserRevisionLine numberNew contents of line
okano 4:cb0ef3fd89c9 1 #ifndef MBED_MARY_CAMERA
okano 4:cb0ef3fd89c9 2 #define MBED_MARY_CAMERA
okano 0:f4584dba3bac 3
okano 4:cb0ef3fd89c9 4 #define SPI_FREQUENCY 12000000
okano 0:f4584dba3bac 5
okano 0:f4584dba3bac 6
okano 4:cb0ef3fd89c9 7 /** MARY_CAMERA class
okano 4:cb0ef3fd89c9 8 *
okano 4:cb0ef3fd89c9 9 * MARY_CAMERA driver library
okano 4:cb0ef3fd89c9 10 * This driver has been made to get camera data from MARY CAMERA.
okano 4:cb0ef3fd89c9 11 *
okano 4:cb0ef3fd89c9 12 * Example:
okano 4:cb0ef3fd89c9 13 * @code
okano 4:cb0ef3fd89c9 14 *
okano 4:cb0ef3fd89c9 15 * #include "mbed.h"
okano 4:cb0ef3fd89c9 16 * #include "MARMEX_OB_oled.h"
okano 4:cb0ef3fd89c9 17 * #include "MARY_CAMERA.h"
okano 4:cb0ef3fd89c9 18 *
okano 4:cb0ef3fd89c9 19 * MARMEX_OB_oled oled1( p5, p7, p20, p16, p15 ); // mosi, sclk, cs, rst, power_control -- maple-mini-type-b-slot1
okano 4:cb0ef3fd89c9 20 * MARY_CAMERA camera( p5, p6, p7, p22, p26, p28, p27 ); // mosi, miso, sclk, cs, reset, I2C_SDA, I2C_SCL
okano 4:cb0ef3fd89c9 21 * BusOut led( LED3, LED4 );
okano 4:cb0ef3fd89c9 22 *
okano 4:cb0ef3fd89c9 23 * #define X_OFFSET ((MARY_CAMERA::PIXEL_PER_LINE - MARMEX_OB_oled::WIDTH ) / 2)
okano 4:cb0ef3fd89c9 24 * #define Y_OFFSET ((MARY_CAMERA::LINE_PER_FRAME - MARMEX_OB_oled::HEIGHT) / 2)
okano 4:cb0ef3fd89c9 25 *
okano 4:cb0ef3fd89c9 26 * int main()
okano 4:cb0ef3fd89c9 27 * {
okano 4:cb0ef3fd89c9 28 * led = 0x3;
okano 4:cb0ef3fd89c9 29 *
okano 4:cb0ef3fd89c9 30 * oled1.cls();
okano 4:cb0ef3fd89c9 31 *
okano 4:cb0ef3fd89c9 32 * short buf[ MARMEX_OB_oled::WIDTH ];
okano 4:cb0ef3fd89c9 33 *
okano 4:cb0ef3fd89c9 34 * while ( 1 ) {
okano 4:cb0ef3fd89c9 35 *
okano 4:cb0ef3fd89c9 36 * led = 0x1;
okano 4:cb0ef3fd89c9 37 * camera.open_transfer();
okano 4:cb0ef3fd89c9 38 *
okano 4:cb0ef3fd89c9 39 * for ( int line = 0; line < 128; line++ ) {
okano 4:cb0ef3fd89c9 40 * camera.transfer_a_line( buf, line + Y_OFFSET, X_OFFSET, 128 );
okano 4:cb0ef3fd89c9 41 * oled1.blit565( 0, line, 128, 1, buf );
okano 4:cb0ef3fd89c9 42 * }
okano 4:cb0ef3fd89c9 43 *
okano 4:cb0ef3fd89c9 44 * camera.close_transfer();
okano 4:cb0ef3fd89c9 45 * led = 0x2;
okano 4:cb0ef3fd89c9 46 * }
okano 4:cb0ef3fd89c9 47 * }
okano 4:cb0ef3fd89c9 48 * @endcode
okano 4:cb0ef3fd89c9 49 */
okano 4:cb0ef3fd89c9 50
okano 4:cb0ef3fd89c9 51
okano 0:f4584dba3bac 52 class MARY_CAMERA
okano 0:f4584dba3bac 53 {
okano 0:f4584dba3bac 54 public:
okano 0:f4584dba3bac 55
okano 4:cb0ef3fd89c9 56 /** General parameters for MARMEX_OB_oled */
okano 4:cb0ef3fd89c9 57 enum {
okano 4:cb0ef3fd89c9 58 PIXEL_PER_LINE = 176, /**< pixels in a line */
okano 4:cb0ef3fd89c9 59 LINE_PER_FRAME = 144, /**< pixels in a line */
okano 4:cb0ef3fd89c9 60 BYTE_PER_PIXEL = 2, /**< bytes per pixel */
okano 4:cb0ef3fd89c9 61 BYTE_PER_LINE = (PIXEL_PER_LINE * BYTE_PER_PIXEL) /**< data size of 1 line */
okano 4:cb0ef3fd89c9 62 };
okano 4:cb0ef3fd89c9 63
okano 4:cb0ef3fd89c9 64 /** Create a MARY_CAMERA instance connected to specified SPI, DigitalOut and I2C pins
okano 0:f4584dba3bac 65 *
okano 4:cb0ef3fd89c9 66 * @param SPI_mosi SPI-bus MOSI pin
okano 4:cb0ef3fd89c9 67 * @param SPI_miso SPI-bus MISO pin
okano 4:cb0ef3fd89c9 68 * @param SPI_sclk SPI-bus SCLK pin
okano 4:cb0ef3fd89c9 69 * @param SPI_cs SPI-bus Chip Select pin
okano 4:cb0ef3fd89c9 70 * @param cam_reset Camera reset pin
okano 4:cb0ef3fd89c9 71 * @param I2C_sda I2C-bus SDA pin
okano 4:cb0ef3fd89c9 72 * @param I2C_scl I2C-bus SCL pin
okano 0:f4584dba3bac 73 */
okano 0:f4584dba3bac 74
okano 0:f4584dba3bac 75 MARY_CAMERA(
okano 4:cb0ef3fd89c9 76 PinName SPI_mosi,
okano 4:cb0ef3fd89c9 77 PinName SPI_miso,
okano 4:cb0ef3fd89c9 78 PinName SPI_sck,
okano 4:cb0ef3fd89c9 79 PinName SPI_cs,
okano 0:f4584dba3bac 80 PinName cam_reset,
okano 4:cb0ef3fd89c9 81 PinName I2C_sda,
okano 4:cb0ef3fd89c9 82 PinName I2C_scl
okano 0:f4584dba3bac 83 );
okano 4:cb0ef3fd89c9 84
okano 4:cb0ef3fd89c9 85 /** Initialization
okano 4:cb0ef3fd89c9 86 *
okano 4:cb0ef3fd89c9 87 * Performs MARY_CAMERA reset and initializations
okano 4:cb0ef3fd89c9 88 * This function is called from MARY_CAMERA constoructor. So user don't have to call in the user code.
okano 4:cb0ef3fd89c9 89 *
okano 4:cb0ef3fd89c9 90 * This function takes about 2 seconds because there is 99 times I2C access with 20ms interval.
okano 4:cb0ef3fd89c9 91 */
okano 0:f4584dba3bac 92 void init( void );
okano 4:cb0ef3fd89c9 93
okano 4:cb0ef3fd89c9 94 /** Open transfer
okano 4:cb0ef3fd89c9 95 *
okano 4:cb0ef3fd89c9 96 * Let the MARY_CAMERA get ready to transfer the data.
okano 4:cb0ef3fd89c9 97 * When this function is called, the camera will stop updating buffer at end of frame.
okano 4:cb0ef3fd89c9 98 */
okano 0:f4584dba3bac 99 void open_transfer( void );
okano 4:cb0ef3fd89c9 100
okano 4:cb0ef3fd89c9 101 /** Close transfer
okano 4:cb0ef3fd89c9 102 *
okano 4:cb0ef3fd89c9 103 * Letting the MARY_CAMERA to know the data transfer done.
okano 4:cb0ef3fd89c9 104 * This function should be called when the data transfer done to resume the buffer update by camera
okano 4:cb0ef3fd89c9 105 */
okano 0:f4584dba3bac 106 void close_transfer( void );
okano 4:cb0ef3fd89c9 107
okano 4:cb0ef3fd89c9 108 /** Transfer a line
okano 4:cb0ef3fd89c9 109 *
okano 4:cb0ef3fd89c9 110 * Reads 1 line data from MARY_CAMERA
okano 4:cb0ef3fd89c9 111 * This function should be called when the data transfer done to resume the buffer update by camera
okano 4:cb0ef3fd89c9 112 *
okano 4:cb0ef3fd89c9 113 * @param *p pointer to array of short
okano 4:cb0ef3fd89c9 114 * @param line_number to select which line want to read
okano 4:cb0ef3fd89c9 115 * @param x_offset holizontal offset (from left) to start the read
okano 4:cb0ef3fd89c9 116 * @param n_of_pixels pixels to be read
okano 4:cb0ef3fd89c9 117 */
okano 0:f4584dba3bac 118 void transfer_a_line( short *p, int line_number, int x_offset, int n_of_pixels );
okano 0:f4584dba3bac 119
okano 0:f4584dba3bac 120 private:
okano 0:f4584dba3bac 121 int send_spi( char data );
okano 0:f4584dba3bac 122 void write_register( char reg, char value );
okano 0:f4584dba3bac 123 int read_register( char reg );
okano 0:f4584dba3bac 124 void set_address( int address );
okano 0:f4584dba3bac 125
okano 4:cb0ef3fd89c9 126 SPI _spi;
okano 4:cb0ef3fd89c9 127 DigitalOut _cs;
okano 4:cb0ef3fd89c9 128 DigitalOut _reset;
okano 4:cb0ef3fd89c9 129 I2C _i2c;
okano 0:f4584dba3bac 130 };
okano 0:f4584dba3bac 131
okano 0:f4584dba3bac 132
okano 0:f4584dba3bac 133
okano 0:f4584dba3bac 134 #endif // MBED_MARY_CAMERA