File content as of revision 10:eed99ef09e63:

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

#ifndef __AKISPILCD_H__
#define __AKISPILCD_H

#include "mbed.h"
//#include "Ser23K256.h"
/** AkiSpiLcd
 * mbed library for SHARP LCD LS027B4DH01
 *
 * Example:
 * @code
 * #include "mbed.h"
 * #include "AkiSpiLcd.h"
 *
 * AkiSpiLcd LCD(MOSI_, SCK_, D2, D5);
 * extern const uint8_t hogepic[];
 * int main()
 * {
 *
 *   wait_ms(1);
 *   LCD.cls();
 *   LCD.updateSingle(10,(uint8_t*)(hogepic+2000));
 *   LCD.updateMulti(100,(240-100),(uint8_t*)(hogepic));
 *
 *   while(1) {
 *       for(int i=0; i<240; i++) {
 *           LCD.updateMulti(i,(240-i),(uint8_t*)(hogepic));
 *           LCD.updateMulti(0,(i),(uint8_t*)(hogepic+50*(240-i)));
 *       }
 *   }
 * }
 * @endcode
 */

//#define RAMLINE_BASE 0x6000
//#define RAMMODE_BASE 0x6100
//#define SCREEN0_BASE 0x0000
//#define SCREEN1_BASE 0x3000
#define SCREEN0 0
#define SCREEN1 1

class AkiSpiLcd
{
public:
    //! base address list for 23K256
    enum BASE_ADDR {
        RAMLINE_BASE = 0x6000,
        RAMMODE_BASE = 0x6100,
        SCREEN0_BASE = 0x0000,
        SCREEN1_BASE = 0x3000
    };

    //! mode codes for 23K256
    enum MODE {
        BYTE_MODE = 0x00,
        SEQUENTIAL_MODE = 0x40
    };

    //! command codes for 23K256
    enum COMMAND {
        READ = 0x03,
        WRITE = 0x02,
        READ_STATUS = 0x05, // called RDSR in datasheet
        WRITE_STATUS = 0x01 // called WRSR in datasheet
    };

    /** Constructor
    * @param mosi SPI data input
    * @param mosi SPI data output
    * @param sck SPI clock input
    * @param cs HIGH-active chip enable input
    * @param disp HIGH-active display enable input
    */
    AkiSpiLcd(PinName mosi, PinName miso, PinName sck, PinName csl, PinName csr);

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

    /** 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
    */
    void ramReadSingle(int line, uint8_t* buffer, int screen);

    /** Reads multi lines(400 x N bits = 50 x N bytes) from a screen
    */
    void ramReadMulti(int startline, int length, uint8_t* buffer, int screen);

    /** Writes single line (400 bits = 50 bytes) into a screen
    */
    void ramWriteSingle(int line, uint8_t* data, int screen);

    /** Writes multi lines(400 x N bits = 50 x N bytes) into a screen
    */
    void ramWriteMulti(int startline, int length, uint8_t* data, int screen);

    /** copies whole data in screen into LCD
    */
    void ram2lcd(int startline, int length, int screen);

//    /** Enables/disables display. internal memory will not flushed
//    * @param disp true = display is on / false = display is off
//    */
//    void dispOn(bool disp);

    /** read a byte from SRAM
    * @param address    The address to read from
    * @return the uint8_tacter at that address
    */
    uint8_t ram_read(int address);
    /** read multiple bytes from SRAM into a buffer
    * @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
    * @param address    The address SRAM 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
    * @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;
    int comflag;
    int modeflag;
    int clearflag;
    SPI _spi;
    DigitalOut _csl;
    DigitalOut _csr;

    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