/*

  u8x8_d_ssd1309.c

  Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/)

  Copyright (c) 2017, olikraus@gmail.com
  All rights reserved.

  Redistribution and use in source and binary forms, with or without modification, 
  are permitted provided that the following conditions are met:

  * Redistributions of source code must retain the above copyright notice, this list 
    of conditions and the following disclaimer.
    
  * Redistributions in binary form must reproduce the above copyright notice, this 
    list of conditions and the following disclaimer in the documentation and/or other 
    materials provided with the distribution.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
  CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 
  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
  
*/

#include "u8x8.h"

static const uint8_t u8x8_d_ssd1309_powersave0_seq[] = {
  U8X8_START_TRANSFER(),             	/* enable chip, delay is part of the transfer start */
  U8X8_C(0x0af),		                  /* display on */
  U8X8_END_TRANSFER(),             	  /* disable chip */
  U8X8_END()             			        /* end of sequence */
};

static const uint8_t u8x8_d_ssd1309_powersave1_seq[] = {
  U8X8_START_TRANSFER(),             	/* enable chip, delay is part of the transfer start */
  U8X8_C(0x0ae),		                  /* display off */
  U8X8_END_TRANSFER(),             	  /* disable chip */
  U8X8_END()             			        /* end of sequence */
};

/* ==> CSC rename u8x8_d_ssd1309_128x64_flip0_seq => u8x8_d_ssd1309_flip0_seq <== */
static const uint8_t u8x8_d_ssd1309_flip0_seq[] = {
  U8X8_START_TRANSFER(),             	/* enable chip, delay is part of the transfer start */
  U8X8_C(0x0a1),				              /* segment remap a0/a1*/
  U8X8_C(0x0c8),				              /* c0: scan dir normal, c8: reverse */
  U8X8_END_TRANSFER(),             	  /* disable chip */
  U8X8_END()             			        /* end of sequence */
};

/* ==> CSC rename u8x8_d_ssd1309_128x64_flip1_seq => u8x8_d_ssd1309_flip1_seq <== */
static const uint8_t u8x8_d_ssd1309_flip1_seq[] = {
  U8X8_START_TRANSFER(),             	/* enable chip, delay is part of the transfer start */
  U8X8_C(0x0a0),				              /* segment remap a0/a1*/
  U8X8_C(0x0c0),				              /* c0: scan dir normal, c8: reverse */
  U8X8_END_TRANSFER(),             	  /* disable chip */
  U8X8_END()             			        /* end of sequence */
};

static uint8_t u8x8_d_ssd1309_generic(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
{
  uint8_t x, c;
  uint8_t *ptr;
  switch(msg)
  {
    case U8X8_MSG_DISPLAY_DRAW_TILE:
      u8x8_cad_StartTransfer(u8x8);
      x = ((u8x8_tile_t *)arg_ptr)->x_pos;    
      x *= 8;
      x += u8x8->x_offset;
    
      u8x8_cad_SendCmd(u8x8, 0x010 | (x>>4) );
      u8x8_cad_SendCmd(u8x8, 0x000 | ((x&15)));
      u8x8_cad_SendCmd(u8x8, 0x0b0 | (((u8x8_tile_t *)arg_ptr)->y_pos)   );

    
      do
      {
	c = ((u8x8_tile_t *)arg_ptr)->cnt;
	ptr = ((u8x8_tile_t *)arg_ptr)->tile_ptr;
	u8x8_cad_SendData(u8x8, c*8, ptr); 	/* note: SendData can not handle more than 255 bytes */
	/*
	do
	{
	  u8x8_cad_SendData(u8x8, 8, ptr);
	  ptr += 8;
	  c--;
	} while( c > 0 );
	*/
	arg_int--;
      } while( arg_int > 0 );
      
      u8x8_cad_EndTransfer(u8x8);
      break;
    case U8X8_MSG_DISPLAY_SET_POWER_SAVE:
      if ( arg_int == 0 )
	u8x8_cad_SendSequence(u8x8, u8x8_d_ssd1309_powersave0_seq);
      else
	u8x8_cad_SendSequence(u8x8, u8x8_d_ssd1309_powersave1_seq);
      break;
#ifdef U8X8_WITH_SET_CONTRAST
    case U8X8_MSG_DISPLAY_SET_CONTRAST:
      u8x8_cad_StartTransfer(u8x8);
      u8x8_cad_SendCmd(u8x8, 0x081 );
      u8x8_cad_SendArg(u8x8, arg_int );	/* ssd1309 has range from 0 to 255 */
      u8x8_cad_EndTransfer(u8x8);
      break;
#endif
    default:
      return 0;
  }
  return 1;
}


/*=================================================*/
/* offset 2 version */

/* timing from SSD1306 */
static const u8x8_display_info_t u8x8_ssd1309_128x64_noname2_display_info =
{
  /* chip_enable_level = */ 0,
  /* chip_disable_level = */ 1,
  
  /* post_chip_enable_wait_ns = */ 20,
  /* pre_chip_disable_wait_ns = */ 10,
  /* reset_pulse_width_ms = */ 100, 	/* SSD1306: 3 us */
  /* post_reset_wait_ms = */ 100, /* far east OLEDs need much longer setup time */
  /* sda_setup_time_ns = */ 50,		/* SSD1306: 15ns, but cycle time is 100ns, so use 100/2 */
  /* sck_pulse_width_ns = */ 50,	/* SSD1306: 20ns, but cycle time is 100ns, so use 100/2, AVR: below 70: 8 MHz, >= 70 --> 4MHz clock */
  /* sck_clock_hz = */ 4000000UL,	/* since Arduino 1.6.0, the SPI bus speed in Hz. Should be  1000000000/sck_pulse_width_ns */
  /* spi_mode = */ 0,		/* active high, rising edge */
  /* i2c_bus_clock_100kHz = */ 4,
  /* data_setup_time_ns = */ 40,
  /* write_pulse_width_ns = */ 150,	/* SSD1306: cycle time is 300ns, so use 300/2 = 150 */
  /* tile_width = */ 16,
  /* tile_height = */ 8,
  /* default_x_offset = */ 2,
  /* flipmode_x_offset = */ 2,
  /* pixel_width = */ 128,
  /* pixel_height = */ 64
};


static const uint8_t u8x8_d_ssd1309_128x64_noname_init_seq[] = {
    
  U8X8_START_TRANSFER(),             	/* enable chip, delay is part of the transfer start */
  
  U8X8_C(0x0ae),		                /* display off */
  U8X8_CA(0x0d5, 0x0a0),		/* clock divide ratio (0x00=1) and oscillator frequency (0x8) */
  //U8X8_CA(0x0a8, 0x03f),		/* multiplex ratio */
  U8X8_C(0x040),		        	/* set display start line to 0 */
  U8X8_CA(0x020, 0x002),		/* horizontal addressing mode */
  
  U8X8_C(0x0a1),				/* segment remap a0/a1*/
  U8X8_C(0x0c8),				/* c0: scan dir normal, c8: reverse */
  // Flipmode
  // U8X8_C(0x0a0),				/* segment remap a0/a1*/
  // U8X8_C(0x0c0),				/* c0: scan dir normal, c8: reverse */
  
  U8X8_CA(0x0da, 0x012),		/* com pin HW config, sequential com pin config (bit 4), disable left/right remap (bit 5) */

  U8X8_CA(0x081, 0x06f), 		/* [2] set contrast control */
  U8X8_CA(0x0d9, 0x0d3), 		/* [2] pre-charge period 0x022/f1*/
  U8X8_CA(0x0db, 0x020), 		/* vcomh deselect level */  
  // if vcomh is 0, then this will give the biggest range for contrast control issue #98
  // restored the old values for the noname constructor, because vcomh=0 will not work for all OLEDs, #116
  
  U8X8_C(0x02e),				/* Deactivate scroll */ 
  U8X8_C(0x0a4),				/* output ram to display */
  U8X8_C(0x0a6),				/* none inverted normal display mode */
  
  //U8X8_C(0x0af),		                /* display on */
    
  U8X8_END_TRANSFER(),             	/* disable chip */
  U8X8_END()             			/* end of sequence */
};

/* CSC ==> */
static const uint8_t u8x8_d_ssd1309_128x128_noname_init_seq[] = {

  U8X8_START_TRANSFER(),             	/* enable chip, delay is part of the transfer start */

  U8X8_C(0x0ae),		                  /* display off */
  U8X8_CA(0x0d5, 0x0a0),		          /* clock divide ratio (0x00=1) and oscillator frequency (0x8) */
  U8X8_CA(0x0a8, 0x07f),              /* multiplex ratio */ /* 128 Zeilen  0x07f, 64 Zeilen 0x03f */
  U8X8_C(0x040),            	        /* set display start line to 0 */
  U8X8_CA(0x020, 0x002),		          /* horizontal addressing mode */

  U8X8_C(0x0a1),				              /* segment remap a0/a1*/
  U8X8_C(0x0c8),				              /* c0: scan dir normal, c8: reverse */
  // Flipmode
  // U8X8_C(0x0a0),				            /* segment remap a0/a1*/
  // U8X8_C(0x0c0),				            /* c0: scan dir normal, c8: reverse */

  U8X8_CA(0x0da, 0x012),		          /* com pin HW config, sequential com pin config (bit 4), disable left/right remap (bit 5) */

  U8X8_CA(0x081, 0x06f), 		          /* [2] set contrast control */
  U8X8_CA(0x0d9, 0x0d3), 		          /* [2] pre-charge period 0x022/f1*/
  U8X8_CA(0x0db, 0x020), 		          /* vcomh deselect level */
  // if vcomh is 0, then this will give the biggest range for contrast control issue #98
  // restored the old values for the noname constructor, because vcomh=0 will not work for all OLEDs, #116

  U8X8_C(0x02e),				              /* Deactivate scroll */
  U8X8_C(0x0a4),				              /* output ram to display */
  U8X8_C(0x0a6),				              /* none inverted normal display mode */

  //U8X8_C(0x0af),		                /* display on */

  U8X8_END_TRANSFER(),             	  /* disable chip */
  U8X8_END()             			        /* end of sequence */
};
/* <== CSC */

uint8_t u8x8_d_ssd1309_128x64_noname2(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
{
    
  if ( u8x8_d_ssd1309_generic(u8x8, msg, arg_int, arg_ptr) != 0 )
    return 1;
  
  switch(msg)
  {
    case U8X8_MSG_DISPLAY_SET_FLIP_MODE:
      if ( arg_int == 0 )
      {
	u8x8_cad_SendSequence(u8x8, u8x8_d_ssd1309_flip0_seq);
	u8x8->x_offset = u8x8->display_info->default_x_offset;
      }
      else
      {
	u8x8_cad_SendSequence(u8x8, u8x8_d_ssd1309_flip1_seq);
	u8x8->x_offset = u8x8->display_info->flipmode_x_offset;
      }
      break;
    case U8X8_MSG_DISPLAY_INIT:
      u8x8_d_helper_display_init(u8x8);
      u8x8_cad_SendSequence(u8x8, u8x8_d_ssd1309_128x64_noname_init_seq);    
      break;
    case U8X8_MSG_DISPLAY_SETUP_MEMORY:
      u8x8_d_helper_display_setup_memory(u8x8, &u8x8_ssd1309_128x64_noname2_display_info);
      break;
    default:
      return 0;
  }
  return 1;
}


/*=================================================*/
/* offset 0 version */

/* timing from SSD1306 */
static const u8x8_display_info_t u8x8_ssd1309_128x64_noname0_display_info =
{
  /* chip_enable_level = */ 0,
  /* chip_disable_level = */ 1,
  
  /* post_chip_enable_wait_ns = */ 20,
  /* pre_chip_disable_wait_ns = */ 10,
  /* reset_pulse_width_ms = */ 100, 	/* SSD1306: 3 us */
  /* post_reset_wait_ms = */ 100, /* far east OLEDs need much longer setup time */
  /* sda_setup_time_ns = */ 50,		/* SSD1306: 15ns, but cycle time is 100ns, so use 100/2 */
  /* sck_pulse_width_ns = */ 50,	/* SSD1306: 20ns, but cycle time is 100ns, so use 100/2, AVR: below 70: 8 MHz, >= 70 --> 4MHz clock */
  /* sck_clock_hz = */ 4000000UL,	/* since Arduino 1.6.0, the SPI bus speed in Hz. Should be  1000000000/sck_pulse_width_ns */
  /* spi_mode = */ 0,		/* active high, rising edge */
  /* i2c_bus_clock_100kHz = */ 4,
  /* data_setup_time_ns = */ 40,
  /* write_pulse_width_ns = */ 150,	/* SSD1306: cycle time is 300ns, so use 300/2 = 150 */
  /* tile_width = */ 16,
  /* tile_height = */ 8,
  /* default_x_offset = */ 0,
  /* flipmode_x_offset = */ 0,
  /* pixel_width = */ 128,
  /* pixel_height = */ 64
};

/* CSC ==> */
static const u8x8_display_info_t u8x8_ssd1309_128x128_noname0_display_info =
{
  /* chip_enable_level = */ 0,
  /* chip_disable_level = */ 1,

  /* post_chip_enable_wait_ns = */ 20,
  /* pre_chip_disable_wait_ns = */ 10,
  /* reset_pulse_width_ms = */ 100, 	/* SSD1306: 3 us */
  /* post_reset_wait_ms = */ 100, /* far east OLEDs need much longer setup time */
  /* sda_setup_time_ns = */ 50,		/* SSD1306: 15ns, but cycle time is 100ns, so use 100/2 */
  /* sck_pulse_width_ns = */ 50,	/* SSD1306: 20ns, but cycle time is 100ns, so use 100/2, AVR: below 70: 8 MHz, >= 70 --> 4MHz clock */
  /* sck_clock_hz = */ 4000000UL,	/* since Arduino 1.6.0, the SPI bus speed in Hz. Should be  1000000000/sck_pulse_width_ns */
  /* spi_mode = */ 0,		/* active high, rising edge */
  /* i2c_bus_clock_100kHz = */ 4,
  /* data_setup_time_ns = */ 40,
  /* write_pulse_width_ns = */ 150,	/* SSD1306: cycle time is 300ns, so use 300/2 = 150 */
  /* tile_width = */ 16,
  /* tile_height = */ 16,
  /* default_x_offset = */ 0,
  /* flipmode_x_offset = */ 0,
  /* pixel_width = */ 128,
  /* pixel_height = */ 128
};
/* <== CSC */

uint8_t u8x8_d_ssd1309_128x64_noname0(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
{
    
  if ( u8x8_d_ssd1309_generic(u8x8, msg, arg_int, arg_ptr) != 0 )
    return 1;
  
  switch(msg)
  {
    case U8X8_MSG_DISPLAY_SET_FLIP_MODE:
      if ( arg_int == 0 )
      {
	u8x8_cad_SendSequence(u8x8, u8x8_d_ssd1309_flip0_seq);
	u8x8->x_offset = u8x8->display_info->default_x_offset;
      }
      else
      {
	u8x8_cad_SendSequence(u8x8, u8x8_d_ssd1309_flip1_seq);
	u8x8->x_offset = u8x8->display_info->flipmode_x_offset;
      }
      break;
    case U8X8_MSG_DISPLAY_INIT:
      u8x8_d_helper_display_init(u8x8);
      u8x8_cad_SendSequence(u8x8, u8x8_d_ssd1309_128x64_noname_init_seq);    
      break;
    case U8X8_MSG_DISPLAY_SETUP_MEMORY:
      u8x8_d_helper_display_setup_memory(u8x8, &u8x8_ssd1309_128x64_noname0_display_info);
      break;
    default:
      return 0;
  }
  return 1;
}

/* CSC ==> */
uint8_t u8x8_d_ssd1309_128x128_noname0(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
{

  if ( u8x8_d_ssd1309_generic(u8x8, msg, arg_int, arg_ptr) != 0 )
    return 1;

  switch(msg)
  {
    case U8X8_MSG_DISPLAY_SET_FLIP_MODE:
      if ( arg_int == 0 )
      {
	    u8x8_cad_SendSequence(u8x8, u8x8_d_ssd1309_flip0_seq);
	    u8x8->x_offset = u8x8->display_info->default_x_offset;
      }
      else
      {
	    u8x8_cad_SendSequence(u8x8, u8x8_d_ssd1309_flip1_seq);
	    u8x8->x_offset = u8x8->display_info->flipmode_x_offset;
      }
      break;
    case U8X8_MSG_DISPLAY_INIT:
      u8x8_d_helper_display_init(u8x8);
      u8x8_cad_SendSequence(u8x8, u8x8_d_ssd1309_128x128_noname_init_seq);
      break;
    case U8X8_MSG_DISPLAY_SETUP_MEMORY:
      u8x8_d_helper_display_setup_memory(u8x8, &u8x8_ssd1309_128x128_noname0_display_info);
      break;
    default:
      return 0;
  }
  return 1;
}
/* <== CSC */

/*=================================================*/
/*
  EA OLEDS102
  Contributed here: https://github.com/olikraus/u8g2/pull/1497/files
  Manually added here, device renamed from SSD1309 to SSD1306
*/

static const uint8_t u8x8_d_ssd1309_102x64_ea_oleds102_init_seq[] = {

  U8X8_START_TRANSFER(),             	/* enable chip, delay is part of the transfer start */

  U8X8_C(0x40),         //Set Display start line
  U8X8_C(0xA0),         //Bottom View no Segment remap
  U8X8_C(0xC0),         //Bottom View COM scan direction normal
  U8X8_C(0x2E),         //StartColumnAddress
  U8X8_CA(0x8D, 0x95),  //Switch Charge Pump (9V)
  U8X8_CA(0x20, 0x02),  //Set Memory AddressMode
  U8X8_CA(0x81, 0xFF),  //Set Brightness
  U8X8_CA(0xD5, 0x40),  //Set Display Clock Divide
  U8X8_CA(0xD9, 0xF1),  //Set Precharge Periode
  U8X8_CA(0xAD, 0x30),  //Set Internal Ref
  U8X8_CAA(0x21, 0x0D, 0x72), //Set ColumnAddress to 13x8 + 10 = 114/0x72
  U8X8_CAA(0x22, 0x00, 0x3F), //Set PageAddress
  U8X8_C(0xAF),         //Display on

  U8X8_END_TRANSFER(),  /* disable chip */
  U8X8_END()            /* end of sequence */
};

/* timing from SSD1306 */
static const u8x8_display_info_t u8x8_ssd1309_102x64_ea_oleds102_display_info =
{
  /* chip_enable_level = */ 0,
  /* chip_disable_level = */ 1,

  /* post_chip_enable_wait_ns = */ 20,
  /* pre_chip_disable_wait_ns = */ 10,
  /* reset_pulse_width_ms = */ 100, 	/* SSD1306: 3 us */
  /* post_reset_wait_ms = */ 100, /* far east OLEDs need much longer setup time */
  /* sda_setup_time_ns = */ 50,		/* SSD1306: 15ns, but cycle time is 100ns, so use 100/2 */
  /* sck_pulse_width_ns = */ 50,	/* SSD1306: 20ns, but cycle time is 100ns, so use 100/2, AVR: below 70: 8 MHz, >= 70 --> 4MHz clock */
  /* sck_clock_hz = */ 4000000UL,	/* since Arduino 1.6.0, the SPI bus speed in Hz. Should be  1000000000/sck_pulse_width_ns */
  /* spi_mode = */ 0,		/* active high, rising edge */
  /* i2c_bus_clock_100kHz = */ 4,
  /* data_setup_time_ns = */ 40,
  /* write_pulse_width_ns = */ 150,	/* SSD1306: cycle time is 300ns, so use 300/2 = 150 */
  /* tile_width = */ 13,  /* width of 13*8=104 pixel */
  /* tile_height = */ 8,
  /* default_x_offset = */ 13, 
  /* flipmode_x_offset = */ 13,
  /* pixel_width = */ 102,
  /* pixel_height = */ 64
};

uint8_t u8x8_d_ssd1306_102x64_ea_oleds102(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
{
  uint8_t x, c;
  uint8_t *ptr;

  switch(msg)
  {
    case U8X8_MSG_DISPLAY_SET_FLIP_MODE:
      if ( arg_int == 0 )
      {
	u8x8_cad_SendSequence(u8x8, u8x8_d_ssd1309_flip0_seq);
	u8x8->x_offset = u8x8->display_info->default_x_offset;
      }
      else
      {
	u8x8_cad_SendSequence(u8x8, u8x8_d_ssd1309_flip1_seq);
	u8x8->x_offset = u8x8->display_info->flipmode_x_offset;
      }
      break;
    case U8X8_MSG_DISPLAY_INIT:
      u8x8_d_helper_display_init(u8x8);
      u8x8_cad_SendSequence(u8x8, u8x8_d_ssd1309_102x64_ea_oleds102_init_seq);    
      break;
    case U8X8_MSG_DISPLAY_SETUP_MEMORY:
      u8x8_d_helper_display_setup_memory(u8x8, &u8x8_ssd1309_102x64_ea_oleds102_display_info);
      break;
    case U8X8_MSG_DISPLAY_SET_CONTRAST:
      u8x8_cad_StartTransfer(u8x8);
      u8x8_cad_SendCmd(u8x8, 0x081 );
      u8x8_cad_SendArg(u8x8, arg_int );	/* ssd1309 has range from 0 to 255 */
      u8x8_cad_EndTransfer(u8x8);
      break;
    case U8X8_MSG_DISPLAY_DRAW_TILE:
      u8x8_cad_StartTransfer(u8x8);

      x = ((u8x8_tile_t *)arg_ptr)->x_pos;
      x *= 8;
      x += u8x8->x_offset;
      u8x8_cad_SendCmd(u8x8, 0x010 | (x>>4) );
      u8x8_cad_SendCmd(u8x8, 0x000 | ((x&15)));
      u8x8_cad_SendCmd(u8x8, 0x0b0 | (((u8x8_tile_t *)arg_ptr)->y_pos));

      c = ((u8x8_tile_t *)arg_ptr)->cnt;
      c *= 8;
      ptr = ((u8x8_tile_t *)arg_ptr)->tile_ptr;

      if ( c + x > 115u )
      {
        c = 115u;
        c -= x;
      }
      do
      {
        u8x8_cad_SendData(u8x8, c, ptr);	/* note: SendData can not handle more than 255 bytes */
        arg_int--;
      } while( arg_int > 0 );

      u8x8_cad_EndTransfer(u8x8);
      break;
    default:
      return 0;
  }
  return 1;
}                                                                     

