File content as of revision 22:5ac00ac2a4be:

/** this is for SHARP LCD LS027B4DH01
* by Kazuki Yamamoto, or _K4ZUKI_
*/

#ifndef __AKISPILCD_H__
#define __AKISPILCD_H__

#include "mbed.h"

/** \class AkiSpiLcd
 * \brief mbed library for SHARP LCD LS027B4DH01
 *
 * Example:
 * @code
 * #include "mbed.h"
 * #include "AkiSpiLcd.h"
 *
 * AkiSpiLcd LCD(MOSI_, MISO_, SCK_, D2, D5);
 * extern const uint8_t hogepic[];
 * int main()
 * {
 *
 *   wait_ms(1);
 *   LCD.cls();
 *   LCD.directUpdateSingle(10,(uint8_t*)(hogepic+2000));
 *   LCD.directUpdateMulti(100,(240-100),(uint8_t*)(hogepic));
 *
 *   while(1) {
 *       for(int i=0; i<240; i++) {
 *           LCD.directUpdateMulti(i,(240-i),(uint8_t*)(hogepic));
 *           LCD.directUpdateMulti(0,(i),(uint8_t*)(hogepic+50*(240-i)));
 *       }
 *   }
 * }
 * @endcode
 */

#define SCREEN0 0
#define SCREEN1 1
#define LINE_LENGTH 50
#define RAMLINE_LENGTH 52

const uint8_t lcd_line[256]= {
    0x00,
    0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0,0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0,0x08,
    0x88,0x48,0xC8,0x28,0xA8,0x68,0xE8,0x18,0x98,0x58,0xD8,0x38,0xB8,0x78,0xF8,0x04,
    0x84,0x44,0xC4,0x24,0xA4,0x64,0xE4,0x14,0x94,0x54,0xD4,0x34,0xB4,0x74,0xF4,0x0C,
    0x8C,0x4C,0xCC,0x2C,0xAC,0x6C,0xEC,0x1C,0x9C,0x5C,0xDC,0x3C,0xBC,0x7C,0xFC,0x02,
    0x82,0x42,0xC2,0x22,0xA2,0x62,0xE2,0x12,0x92,0x52,0xD2,0x32,0xB2,0x72,0xF2,0x0A,
    0x8A,0x4A,0xCA,0x2A,0xAA,0x6A,0xEA,0x1A,0x9A,0x5A,0xDA,0x3A,0xBA,0x7A,0xFA,0x06,
    0x86,0x46,0xC6,0x26,0xA6,0x66,0xE6,0x16,0x96,0x56,0xD6,0x36,0xB6,0x76,0xF6,0x0E,
    0x8E,0x4E,0xCE,0x2E,0xAE,0x6E,0xEE,0x1E,0x9E,0x5E,0xDE,0x3E,0xBE,0x7E,0xFE,0x01,
    0x81,0x41,0xC1,0x21,0xA1,0x61,0xE1,0x11,0x91,0x51,0xD1,0x31,0xB1,0x71,0xF1,0x09,
    0x89,0x49,0xC9,0x29,0xA9,0x69,0xE9,0x19,0x99,0x59,0xD9,0x39,0xB9,0x79,0xF9,0x05,
    0x85,0x45,0xC5,0x25,0xA5,0x65,0xE5,0x15,0x95,0x55,0xD5,0x35,0xB5,0x75,0xF5,0x0D,
    0x8D,0x4D,0xCD,0x2D,0xAD,0x6D,0xED,0x1D,0x9D,0x5D,0xDD,0x3D,0xBD,0x7D,0xFD,0x03,
    0x83,0x43,0xC3,0x23,0xA3,0x63,0xE3,0x13,0x93,0x53,0xD3,0x33,0xB3,0x73,0xF3,0x0B,
    0x8B,0x4B,0xCB,0x2B,0xAB,0x6B,0xEB,0x1B,0x9B,0x5B,0xDB,0x3B,0xBB,0x7B,0xFB,0x07,
    0x87,0x47,0xC7,0x27,0xA7,0x67,0xE7,0x17,0x97,0x57,0xD7,0x37,0xB7,0x77,0xF7,0x0F,
};

class AkiSpiLcd
{
public:
    /** \enum BASE_ADDR
        \brief base address list for 23K256
        @param SCREEN0_BASE = 0x0000,
        @param SCREEN1_BASE = 0x3000,
        @param RAMLINE_BASE = 0x6000,
    */
    enum BASE_ADDR {
        SCREEN0_BASE = 0x0000,
        SCREEN1_BASE = 0x4000,
//        RAMLINE_BASE = 0x7000,
    };

    /** Constructor
    * @param mosi SPI data output from mbed
    * @param mosi SPI data input from slave
    * @param sck SPI clock output from mbed
    * @param csl HIGH-active chip select input for LCD
    * @param csr LOW-active chip select input for SRAM
    */
    AkiSpiLcd(PinName mosi, PinName miso, PinName sck, PinName csl, PinName csr,long mhz,int width,int height);

    /** Clear screen
    */
    void cls();

    /** Clear screen of SRAM
    * @param screen screen number (0 or 1)
    */
    void cls_ram( int screen );
    
    /** place a dot pixel
    * @param x x position
    * @param y y position
    */
//    virtual void pixel(int x, int y, int colour);
//    virtual int width() = 0;
//    virtual int height() = 0;

    /** Writes single line(400 bits = 50 bytes)
    * @param line line number(1-240)
    * @param *data pointer to data
    */
    void directUpdateSingle(int line, uint8_t* data);

    /** Writes multi lines(400 x N bits = 50 x N bytes)
    * @param line line number(1-240)
    * @param length number of line to write
    * @param *data pointer to data
    */
    void directUpdateMulti(int startline, int length, uint8_t* data);

    /** Inverting internal COM signal
    */
    void cominvert();

    /** Reads single line (400 bits = 50 bytes) from a screen and writes into buffer
    * @param line line number(1-240)
    * @param buffer pointer to buffer(50 bytes)
    * @param screen screen to read from(0 or 1)
    */
    void ramReadSingleLine(int line, uint8_t* buffer, int screen);

    /** Reads multi lines(400 x N bits = 50 x N bytes) from a screen
    * @param startline starting line number(1-240)
    * @param length number of line to read
    * @param *buffer pointer to buffer
    * @param screen screen to read from(0 or 1)
    */
    void ramReadMultiLine(int startline, int length, uint8_t* buffer, int screen);

    /** Writes single line (400 bits = 50 bytes) into a screen
    * @param line line number(1-240)
    * @param *data pointer to data to write(50 bytes)
    * @param screen screen to read from(0 or 1)
    */
    void ramWriteSingleLine(int line, uint8_t* data, int screen);

    /** Writes multi lines(400 x N bits = 50 x N bytes) into a screen
    * @param startline starting line number(1-240)
    * @param length number of line to read
    * @param *data pointer to data to write
    * @param screen screen to read from(0 or 1)
    */
    void ramWriteMultiLine(int startline, int length, uint8_t* data, int screen);

    /** copies whole data in screen into LCD
    * @param startline starting line number(1-240)
    * @param length number of line to read
    * @param screen screen to copy (0 or 1)
    */
    void ram2lcd(int startline, int length, int screen);

    /** copies whole data in screen into LCD
    * @param screen screen to copy (0 or 1)
    */
    void ram2lcd(int screen);

    /** read a byte from SRAM (copied from Ser23K256)
    * @param address    The address to read from
    * @return the character at that address
    */
    uint8_t ram_read(int address);

    /** read multiple bytes from SRAM into a buffer (copied from Ser23K256)
    * @param address    The SRAM address to read from
    * @param buffer     The buffer to read into (must be big enough!)
    * @param count      The number of bytes to read
    */
    void ram_read(int address, uint8_t * buffer, int count);

    /** write a byte to SRAM (copied from Ser23K256)
    * @param address    The SRAM address to write to
    * @param byte       The byte to write there
    */
    void ram_write(int address, uint8_t byte);

    /** write multiple bytes to SRAM from a buffer (copied from Ser23K256)
    * @param address    The SRAM address write to
    * @param buffer     The buffer to write from
    * @param count      The number of bytes to write
    */
    void ram_write(int address, uint8_t * buffer, int count);

private:
//    Ser23K256 _ram;

    enum MODE {
        BYTE_MODE = 0x00,
        SEQUENTIAL_MODE = 0x40
    };

    enum COMMAND {
        READ = 0x03,
        WRITE = 0x02,
        READ_STATUS = 0x05, // called RDSR in datasheet
        WRITE_STATUS = 0x01 // called WRSR in datasheet
    };

    int _comflag;
    int _modeflag;
    int _clearflag;
    SPI _spi;
    DigitalOut _csl;
    DigitalOut _csr;
    int _width;
    int _height;

    void _cls_ram( int address );
    uint8_t ram_readStatus();
    void _ram_writeStatus(uint8_t status);
    void _ram_prepareCommand(uint8_t command, int address);
    void _ram_select();
    void _ram_deselect();
};
#endif