2.3.0

src/U8x8lib.cpp

@@ -74,7 +74,23 @@ extern "C" uint8_t u8x8_gpio_and_delay_arduino(u8x8_t *u8x8, uint8_t msg, uint8_
 	}
 	  
       break;
-  
+
+#ifndef __AVR__	
+    /* this case is not compiled for any AVR, because AVR uC are so slow */
+    /* that this delay does not matter */
+    case U8X8_MSG_DELAY_NANO:
+      delayMicroseconds(arg_int==0?0:1);
+      break;
+#endif
+    
+    case U8X8_MSG_DELAY_10MICRO:
+      /* not used at the moment */
+      break;
+    
+    case U8X8_MSG_DELAY_100NANO:
+      /* not used at the moment */
+      break;
+   
     case U8X8_MSG_DELAY_MILLI:
       delay(arg_int);
       break;

src/clib/u8x8.h

@@ -79,7 +79,7 @@
     U8X8_MSG_DELAY_MILLI
     U8X8_MSG_DELAY_10MICRO
     U8X8_MSG_DELAY_100NANO
-  
+    U8X8_MSG_DELAY_NANO
 */
 
 #ifndef _U8X8_H

src/clib/u8x8_d_st7920.c

@@ -123,13 +123,16 @@ uint8_t u8x8_d_st7920_common(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *a
       */
       c = ((u8x8_tile_t *)arg_ptr)->cnt;	/* number of tiles */
       ptr = ((u8x8_tile_t *)arg_ptr)->tile_ptr;	/* data ptr to the tiles */
+      /* The following byte is sent to allow the ST7920 to sync up with the data */
+      /* it solves some issues with garbage data */
+      u8x8_cad_SendCmd(u8x8, 0x03e );	/* enable extended mode */
       for( i = 0; i < 8; i++ )
       {
 	u8x8_cad_SendCmd(u8x8, 0x03e );	/* enable extended mode */
 	u8x8_cad_SendCmd(u8x8, 0x080 | (y+i) );      /* y pos  */
 	u8x8_cad_SendCmd(u8x8, 0x080 | x );      /* set x pos */
 	c = ((u8x8_tile_t *)arg_ptr)->cnt;	/* number of tiles */
-	
+
 	u8x8->gpio_and_delay_cb(u8x8, U8X8_MSG_DELAY_NANO, 200, NULL);	/* extra dely required */
 	u8x8_cad_SendData(u8x8, c, ptr);	/* note: SendData can not handle more than 255 bytes, send one line of data */
 	ptr += c;
@@ -181,6 +184,7 @@ static const u8x8_display_info_t u8x8_st7920_128x64_display_info =
   /* sda_setup_time_ns = */ 20,		
   /* sck_pulse_width_ns = */  140,	/* datasheet ST7920 */
   /* sck_clock_hz = */ 1000000UL,	/* since Arduino 1.6.0, the SPI bus speed in Hz. Should be  1000000000/sck_pulse_width_ns */
+  /* ST7920+Due work with 1MHz but not with 2MHz, ST7920+Uno works with 2MHz */
   /* spi_mode = */ 1,		/* active high, rising edge */
   /* i2c_bus_clock_100kHz = */ 4,
   /* data_setup_time_ns = */ 30,

src/clib/u8x8_d_uc1701_mini12864.c

@@ -82,16 +82,16 @@ static const uint8_t u8x8_d_uc1701_mini12864_powersave1_seq[] = {
 
 static const uint8_t u8x8_d_uc1701_mini12864_flip0_seq[] = {
   U8X8_START_TRANSFER(),             	/* enable chip, delay is part of the transfer start */
-  U8X8_C(0x0a1),				/* segment remap a0/a1*/
-  U8X8_C(0x0c0),				/* c0: scan dir normal, c8: reverse */
+  U8X8_C(0x0a0),				/* 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_uc1701_mini12864_flip1_seq[] = {
   U8X8_START_TRANSFER(),             	/* enable chip, delay is part of the transfer start */
-  U8X8_C(0x0a0),				/* segment remap a0/a1*/
-  U8X8_C(0x0c8),				/* c0: scan dir normal, c8: reverse */
+  U8X8_C(0x0a1),				/* segment remap a0/a1*/
+  U8X8_C(0x0c0),				/* c0: scan dir normal, c8: reverse */
   U8X8_END_TRANSFER(),             	/* disable chip */
   U8X8_END()             			/* end of sequence */
 };
@@ -116,7 +116,7 @@ static const u8x8_display_info_t u8x8_uc1701_display_info =
   /* tile_width = */ 16,		/* width of 16*8=128 pixel */
   /* tile_hight = */ 8,
   /* default_x_offset = */ 0,
-  /* flipmode_x_offset = */ 30,
+  /* flipmode_x_offset = */ 4,
   /* pixel_width = */ 128,
   /* pixel_height = */ 64
 };