File content as of revision 30:d5c18e268866:

/** 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);

  /** 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;

  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