File content as of revision 32:7e37fd2ddaa4:

/* Copyright (c) 2016 Kazuki Yamamoto <k.yamamoto.08136891@gmail.com>
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files
(the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of the Software,
and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/** this is for SHARP LCD LS027B4DH01
* (c) Kazuki Yamamoto, or _K4ZUKI_
*/

#include "AkiSpiLcd.h"
#include "mbed.h"  //NOLINT
// #include "Ser23K256.h"
extern const uint8_t lcd_line[];

AkiSpiLcd::AkiSpiLcd(PinName mosi, PinName miso, PinName sck, PinName csl,
                     PinName csr)
    : _spi(mosi, miso, sck), _csl(csl), _csr(csr) {
  _csl = 0;
  _csr = 1;
  _spi.format(8, 0);
  _spi.frequency(1000000);
  _comflag = 0;
}

void AkiSpiLcd::cls() {
  _csl = 1;

  _spi.write(AkiLCD_MODE::CLEAR_SCREEN | (_comflag << 6));
  _spi.write(0x00);

  _csl = 0;

  cominvert();
}

void AkiSpiLcd::cls_ram(int screen) {
  screen &= 1;
  if (screen == SCREEN0) {
    _cls_ram(SCREEN0_BASE);
  } else {
    _cls_ram(SCREEN1_BASE);
  }
}

void AkiSpiLcd::directUpdateSingle(int line, uint8_t *data) {
  _csl = 1;
  if (line == 0) line = 1;

  _spi.write(AkiLCD_MODE::UPDATE | (_comflag << 6));
  _spi.write((uint8_t)lcd_line[line]);

  for (int i = 0; i < 50; i++) {
    _spi.write(*(data + i));
  }
  _spi.write(0x00);
  _spi.write(0x00);

  _csl = 0;

  cominvert();
}

void AkiSpiLcd::directUpdateMulti(int line, int length, uint8_t *data) {
  if (line == 0) line = 1;

  if (length > 0) {
    _csl = 1;

    for (int j = 1; j <= length; j++) {
      _spi.write(AkiLCD_MODE::UPDATE | (_comflag << 6));
      _spi.write((uint8_t)lcd_line[line]);
      for (int i = 0; i < 50; i++) {
        _spi.write(*(data + (50 * j + i)));
      }
      line += 1;
    }
    _spi.write(0x00);
    _spi.write(0x00);

    _csl = 0;
  }
  cominvert();
}

void AkiSpiLcd::cominvert() {
  _csl = 1;

  _spi.write(AkiLCD_MODE::COM_INVERT | (_comflag << 6));
  _spi.write(0x00);

  _csl = 0;
  if (_comflag == 0) {
    _comflag = 1;
  } else {
    _comflag = 0;
  }
}

/** Reads single line (16 + 400 bits = 52 bytes) from a screen
*/
void AkiSpiLcd::ramReadSingleLine(int line, uint8_t *buffer, int screen) {
  screen &= 1;
  if (screen == SCREEN0) {
    screen = SCREEN0_BASE;
  } else {
    screen = SCREEN1_BASE;
  }

  line *= RAMLINE_LENGTH;
  int address = screen + line;
  ram_read(address, buffer, RAMLINE_LENGTH);
}

/** Reads multi lines( (16 + 400) x N bits = 52 x N bytes) from a screen
*/
void AkiSpiLcd::ramReadMultiLine(int line, int length, uint8_t *buffer,
                                 int screen) {
  screen &= 1;
  if (screen == SCREEN0) {
    screen = SCREEN0_BASE;
  } else {
    screen = SCREEN1_BASE;
  }
  line *= RAMLINE_LENGTH;
  int address = screen + line;
  ram_read(address, buffer, RAMLINE_LENGTH * length);
}

/** Writes single line (400 bits = 50 bytes) into a screen
*/
void AkiSpiLcd::ramWriteSingleLine(int line, uint8_t *data, int screen) {
  screen &= 1;
  if (screen == SCREEN0) {
    screen = SCREEN0_BASE;
  } else {
    screen = SCREEN1_BASE;
  }
  line--;
  line *= RAMLINE_LENGTH;
  int address = screen + line;
  ram_write(address, data, 50);
}

/** Writes multi lines(400 x N bits = 50 x N bytes) into a screen
*/
void AkiSpiLcd::ramWriteMultiLine(int line, int length, uint8_t *data,
                                  int screen) {
  screen &= 1;
  if (screen == SCREEN0) {
    screen = SCREEN0_BASE;
  } else {
    screen = SCREEN1_BASE;
  }
  //    line--;
  //    line*=RAMLINE_LENGTH;

  int address = screen + line * RAMLINE_LENGTH;
  _ram_writeStatus(SEQUENTIAL_MODE);
  _ram_prepareCommand(WRITE, address);
  for (int i = 0; i < length; i++) {
    _spi.write(AkiLCD_MODE::UPDATE | (_comflag << 6));
    _spi.write((uint8_t)lcd_line[line]);
    for (int j = 0; j < LINE_LENGTH; j++) {
      _spi.write(*data);
      data++;
    }
    line++;
  }
  _ram_deselect();
  _ram_writeStatus(BYTE_MODE);
  //    ram_write(address,data,50*length);
}

/** copies whole data in screen into LCD
*/
void AkiSpiLcd::ram2lcd(int startline, int length, int screen) {
  screen &= 1;
  if (screen == SCREEN0) {
    screen = SCREEN0_BASE;
  } else {
    screen = SCREEN1_BASE;
  }
  if (startline == 0) startline = 1;

  if (length > 0) {
    int address = screen + startline * RAMLINE_LENGTH;
    //    uint8_t dummy[RAMLINE_LENGTH+2];
    int dummy = 0;

    _ram_writeStatus(SEQUENTIAL_MODE);
    _ram_prepareCommand(READ, address);
    _spi.format(16, 0);
    _csl = 1;
    // wait_us(5);

    for (int j = 0; j <= length; j++) {
      //        _csl=1;
      for (int k = 0; k < RAMLINE_LENGTH; k += 4) {
        dummy = _spi.write(0x55de);
        //                dummy = _spi.write(0xde);
        dummy = _spi.write(0xadaa);
        //            dummy = _spi.write(0xbe);
        //            dummy = _spi.write(0xaf);
        //                dummy = _spi.write(0xaa);
      }
      //        _csl = 0;
    }
  }
  _spi.write(0xdead);
  // wait_us(5);
  _csl = 0;
  //    _spi.write(0xde);
  //    _spi.write(0xad);
  _ram_deselect();
  _spi.format(8, 0);
  cominvert();
}

/** copies whole data in screen into LCD
*/
void AkiSpiLcd::ram2lcd(int screen) {
  uint8_t lineBuffer[RAMLINE_LENGTH];
  for (int y = 0; y < 240; y++) {
    ram_read(y * RAMLINE_LENGTH + 2, lineBuffer, RAMLINE_LENGTH);
    directUpdateSingle(y + 1, lineBuffer);
  }
}
uint8_t AkiSpiLcd::ram_read(int address) {
  _ram_prepareCommand(READ, address);
  int result = _spi.write(0);
  _ram_deselect();
  return (uint8_t)result;
}

void AkiSpiLcd::ram_read(int address, uint8_t *buffer, int count) {
  _ram_writeStatus(SEQUENTIAL_MODE);
  _ram_prepareCommand(READ, address);
  for (int i = 0; i < count; i++) {
    buffer[i] = _spi.write(0x00);
  }
  _ram_deselect();
  _ram_writeStatus(BYTE_MODE);
}

void AkiSpiLcd::ram_write(int address, uint8_t byte) {
  _ram_prepareCommand(WRITE, address);
  _spi.write(byte);
  _ram_deselect();
}

void AkiSpiLcd::ram_write(int address, uint8_t *buffer, int count) {
  _ram_writeStatus(SEQUENTIAL_MODE);
  _ram_prepareCommand(WRITE, address);
  for (int i = 0; i < count; i++) {
    _spi.write(buffer[i]);
  }
  _ram_deselect();
  _ram_writeStatus(BYTE_MODE);
}

uint8_t AkiSpiLcd::ram_readStatus() {
  _ram_select();
  _spi.write(READ_STATUS);
  uint8_t result = (uint8_t)_spi.write(0);
  _ram_deselect();
  return result;
}

void AkiSpiLcd::_ram_writeStatus(uint8_t status) {
  _ram_select();
  _spi.write(WRITE_STATUS);
  _spi.write(status);
  _ram_deselect();
}

void AkiSpiLcd::_ram_prepareCommand(uint8_t command, int address) {
  _ram_select();
  _spi.write(command);
  _spi.write(address >> 8);
  _spi.write(address & 0xFF);
}

void AkiSpiLcd::_ram_select() { _csr = 0; }

void AkiSpiLcd::_ram_deselect() { _csr = 1; }

void AkiSpiLcd::_cls_ram(int address) {
  _ram_writeStatus(SEQUENTIAL_MODE);
  _ram_prepareCommand(WRITE, address);
  for (int i = 1; i <= (240); i++) {
    _spi.write(AkiLCD_MODE::UPDATE | (_comflag << 6));
    _spi.write((uint8_t)lcd_line[i]);
    for (int j = 0; j < 50; j++) {
      _spi.write(0x00);
    }
  }
  _ram_deselect();
  _ram_writeStatus(BYTE_MODE);
}