diff -r 000000000000 -r 88d965579617 components/u8g2/csrc/u8x8_d_st75320.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/components/u8g2/csrc/u8x8_d_st75320.c	Tue Oct 08 12:00:31 2019 +0200
@@ -0,0 +1,271 @@
+/*
+
+  u8x8_d_st75320.c
+
+  Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/)
+
+  Copyright (c) 2019, 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.  
+
+
+  ST75320: 320x240 monochrome LCD
+  
+  https://github.com/olikraus/u8g2/issues/921
+
+*/
+
+
+#include "u8x8.h"
+
+static const uint8_t u8x8_d_st75320_jlx320240_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_st75320_jlx320240_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 */
+};
+
+static const uint8_t u8x8_d_st75320_jlx320240_flip0_seq[] = {
+  U8X8_START_TRANSFER(),             	/* enable chip, delay is part of the transfer start */
+  U8X8_CA(0xC4, 0x02), 			/* COM Output Status, Bits 0 & 1 */
+  U8X8_C(0xA1), 				/* Column Address Direction: Bit 0 */
+  //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 */
+};
+
+static const uint8_t u8x8_d_st75320_jlx320240_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_CA(0xC4, 0x03), 			/* COM Output Status, Bits 0 & 1 */
+  U8X8_C(0xA0), 				/* Column Address Direction: Bit 0 */
+  U8X8_END_TRANSFER(),             	/* disable chip */
+  U8X8_END()             			/* end of sequence */
+};
+
+
+
+
+/*===================================================*/
+
+static uint8_t u8x8_d_st75320_generic(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
+{
+  uint16_t x;
+  uint8_t c;
+  uint8_t *ptr;
+  switch(msg)
+  {
+    /* handled by the calling function
+    case U8X8_MSG_DISPLAY_SETUP_MEMORY:
+      u8x8_d_helper_display_setup_memory(u8x8, &u8x8_st75320_jlx320240_display_info);
+      break;
+    */
+    /* handled by the calling function
+    case U8X8_MSG_DISPLAY_INIT:
+      u8x8_d_helper_display_init(u8x8);
+      u8x8_cad_SendSequence(u8x8, u8x8_d_st75320_jlx320240_init_seq);    
+      break;
+    */
+    case U8X8_MSG_DISPLAY_SET_POWER_SAVE:
+      if ( arg_int == 0 )
+	u8x8_cad_SendSequence(u8x8, u8x8_d_st75320_jlx320240_powersave0_seq);
+      else
+	u8x8_cad_SendSequence(u8x8, u8x8_d_st75320_jlx320240_powersave1_seq);
+      break;
+    case U8X8_MSG_DISPLAY_SET_FLIP_MODE:
+      if ( arg_int == 0 )
+      {
+	u8x8_cad_SendSequence(u8x8, u8x8_d_st75320_jlx320240_flip0_seq);
+	u8x8->x_offset = u8x8->display_info->default_x_offset;
+      }
+      else
+      {
+	u8x8_cad_SendSequence(u8x8, u8x8_d_st75320_jlx320240_flip1_seq);
+	u8x8->x_offset = u8x8->display_info->flipmode_x_offset;
+      }
+      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<<2 );	
+      u8x8_cad_SendArg(u8x8, arg_int>>6 );	
+      u8x8_cad_EndTransfer(u8x8);
+      break;
+#endif
+    case U8X8_MSG_DISPLAY_DRAW_TILE:
+      x = ((u8x8_tile_t *)arg_ptr)->x_pos;    
+      x *= 8;
+      x += u8x8->x_offset;
+
+      u8x8_cad_StartTransfer(u8x8);
+    
+      u8x8_cad_SendCmd(u8x8, 0x013);
+      u8x8_cad_SendArg(u8x8, (x>>8) );
+      u8x8_cad_SendArg(u8x8, (x&255) );
+      u8x8_cad_SendCmd(u8x8, 0x0b1 ); 
+      u8x8_cad_SendArg(u8x8, (((u8x8_tile_t *)arg_ptr)->y_pos)); 
+
+
+      u8x8_cad_SendCmd(u8x8, 0x01d );		// write data 
+    
+      do
+      {
+        c = ((u8x8_tile_t *)arg_ptr)->cnt;
+        ptr = ((u8x8_tile_t *)arg_ptr)->tile_ptr;
+        /* SendData can not handle more than 255 bytes */
+        if ( c > 31 )
+        {
+          u8x8_cad_SendData(u8x8, 248, ptr); 	/* 31*8=248 */
+          ptr+=248;
+          c -= 31;
+        }
+        
+        u8x8_cad_SendData(u8x8, c*8, ptr); 	
+        arg_int--;
+      } while( arg_int > 0 );
+
+      
+      u8x8_cad_EndTransfer(u8x8);
+      break;
+    default:
+      return 0;
+  }
+  return 1;
+}
+
+/*===================================================*/
+
+
+/* QT-2832TSWUG02/ZJY-2832TSWZG02 */
+static const uint8_t u8x8_d_st75320_jlx320240_init_seq[] = {
+    
+  U8X8_START_TRANSFER(),             	/* enable chip, delay is part of the transfer start */
+  
+  U8X8_C(0xAE), 				// Display OFF
+  U8X8_CA(0xEA, 0x00), 			// Power Discharge Control, Discharge OFF
+  U8X8_C(0xA8), 				// sleep out
+  U8X8_C(0xAB), 				// OSC ON
+  U8X8_C(0x69), 				// Temperature Detection ON
+  U8X8_C(0x4E), 				// TC Setting
+  U8X8_A8(0xff, 0x44, 0x12, 0x11,  0x11, 0x11, 0x22, 0x23),
+  U8X8_CAA(0x39, 0x00, 0x00), 	//TC Flag
+  
+  
+  U8X8_CA(0x2B, 0x00), 			// Frame Rate Level
+  U8X8_CAA(0x5F, 0x66, 0x66), 	// Set Frame Frequency, fFR=80Hz in all temperature range
+  U8X8_CAAA(0xEC, 0x19, 0x64, 0x6e), // FR Compensation Temp. Range, TA = -15 degree, TB = 60 degree, TC = 70 degree
+  U8X8_CAA(0xED, 0x04, 0x04), 	// Temp. Hysteresis Value (thermal sensitivity)
+  U8X8_C(0xA6), 				// Display Inverse OFF
+  U8X8_C(0xA4), 				// Disable Display All Pixel ON
+
+  U8X8_CA(0xC4, 0x02), 			// COM Output Status  
+  U8X8_C(0xA1), 				// Column Address Direction: MX=0
+  
+  U8X8_CAA(0x6D, 0x07, 0x00), 	// Display Area, Duty = 1/240 duty, Start Group = 1
+  U8X8_C(0x84), 				// Display Data Input Direction: Column
+  U8X8_CA(0x36, 0x1e), 			// Set N-Line
+  U8X8_C(0xE4), 				// N-Line On
+  U8X8_CA(0xE7, 0x19), 			// LCD Drive Method //NLFR=1//
+
+  U8X8_CAA(0x81, 0x4f, 0x01), 	// OX81: Set EV=64h, 0..255, 0..3
+  U8X8_CA(0xA2, 0x0a), 			// BIAS //1/16 BIAS
+  U8X8_CA(0x25, 0x020), 		// Power Control //AVDD ON
+  U8X8_DLY(10),
+  U8X8_CA(0x25, 0x60), 			// Power Control//AVDD, MV3 & NAVDD ON
+  U8X8_DLY(10),
+  U8X8_CA(0x25, 0x70), 			// Power Control //AVDD, MV3, NAVDD & V3 ON
+  U8X8_DLY(10),
+  U8X8_CA(0x25, 0x78), 			// Power Control//AVDD, MV3, NAVDD, V3 & VPF ON
+  U8X8_DLY(10),
+  U8X8_CA(0x25, 0x7c), 			// Power Control//AVDD, MV3, NAVDD, V3, VPF & VNF ON
+  U8X8_DLY(10),
+  U8X8_CA(0x25, 0x7e), 			// Power Control//VOUT, AVDD, MV3, NAVDD, V3, VPF & VNF ON
+  U8X8_DLY(10),
+  U8X8_CA(0x25, 0x7f), 			// Power Control/VOUT, AVDD, MV3, NAVDD, V3, VPF & VNF ON
+  U8X8_DLY(10),
+  //U8X8_C(0xaf); //Display ON  
+    
+  U8X8_END_TRANSFER(),             	/* disable chip */
+  U8X8_END()           			/* end of sequence */
+};
+
+
+
+
+static const u8x8_display_info_t u8x8_st75320_jlx320240_display_info =
+{
+  /* chip_enable_level = */ 0,
+  /* chip_disable_level = */ 1,
+  
+  /* post_chip_enable_wait_ns = */ 20,
+  /* pre_chip_disable_wait_ns = */ 20,
+  /* reset_pulse_width_ms = */ 5, 	
+  /* post_reset_wait_ms = */ 5, 		/**/
+  /* sda_setup_time_ns = */ 20,		/* */
+  /* sck_pulse_width_ns = */ 40,	/*  */
+  /* 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,	/* 400KHz */
+  /* data_setup_time_ns = */ 15,
+  /* write_pulse_width_ns = */ 70,	
+  /* tile_width = */ 40,
+  /* tile_hight = */ 30,
+  /* default_x_offset = */ 0,
+  /* flipmode_x_offset = */ 0,
+  /* pixel_width = */ 320,
+  /* pixel_height = */ 240
+};
+
+uint8_t u8x8_d_st75320_jlx320240(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
+{
+    
+  if ( u8x8_d_st75320_generic(u8x8, msg, arg_int, arg_ptr) != 0 )
+    return 1;
+  
+  switch(msg)
+  {
+    case U8X8_MSG_DISPLAY_INIT:
+      u8x8_d_helper_display_init(u8x8);
+      u8x8_cad_SendSequence(u8x8, u8x8_d_st75320_jlx320240_init_seq);    
+      break;
+    case U8X8_MSG_DISPLAY_SETUP_MEMORY:
+      u8x8_d_helper_display_setup_memory(u8x8, &u8x8_st75320_jlx320240_display_info);
+      break;
+    default:
+      return 0;
+  }
+  return 1;
+}