--- a/gdew0154t8.py	Thu Apr 05 20:09:18 2018 +0200
+++ b/gdew0154t8.py	Thu Apr 05 20:45:06 2018 +0200
@@ -1,3 +1,16 @@
+_FONT = (
+    b'LLLLLLLB\x13BLLGKLGKLz3z3zLb3f3vL/wP"/L|7!r$LLLGKLLLr3\rLLL\r3rLLfP'
+    b'rPfLDDrDDLLL\xfc<LLDDDDDLLL,,LL,tPBOLr3\x053rLL\x0e33\x0cL>7\x15\x03*Ln/'
+    b'\x053zLP\x12;5\x1cL{+\t1wLr3\t1vLO=1COLz3\x053zLB\x13\x1d3rLLzzLLLL\xfa:'
+    b'LLLDPz/\rLXXXXXL\r/zPDLNO\x15CJLp2\x0e\x16PL23_32L33\x053zLr3\r/nL33\r3r'
+    b'L33\x1d\r/L33]MOLr3\r76L33\\33LL\r33\rL}=\r3sL33D;/L33\x0c\x0c,L32P23L32'
+    b'Ps3Lr3\r3rL33]SBLr3-\xb3\xf2L33]3"Lj#\x057~LMM33MMs3\x0c3sLKS4SKL3sTs3L/'
+    b';P;/LKC44CK?5\x11\x03+LL33\r\rLOBPt,L\r\r33LLPBKBPL,,,,,LLNKBLLt0\x0800L'
+    b'33\x080tLt0\x08 dLt0\x0833Lt0\x18\x10TL\\\xb2\xb3]NLP\xf0\xe8\xb0\x94L33'
+    b'H04LLH11LLL\xc8\xb11LL33\\ \x08LMs3\x0clL00p04L00H04Lt0\x080tL\xb0\xb0'
+    b'\x080tLt0\x08\xb0\xb0L00H@@L\x14\x10\x188|LHr3\x08LLp0\x0c00LPp\x0cpPLp0'
+    b'|0pL  t  LP\xf0\xec\xb00L(80\x10\x00LLDf3;\rLL33LL\r;3fDLBOC@KL')
+
 _LUT_FULL = (
     b'\x00\x08\x00\x00\x00\x02' b'\x60\x28\x28\x00\x00\x01'
     b'\x00\x14\x00\x00\x00\x01' b'\x00\x12\x12\x00\x00\x01'
@@ -81,7 +94,8 @@
         self._command(b'\x06', b'\x17\x17\x17')  # booster soft start
         self._command(b'\x04')  # power on
         self._wait()
-        self._command(b'\x00', b'\x33\x0d')  # panel setting for BW
+        #self._command(b'\x00', b'\x33\x0d')  # panel setting for BW
+        self._command(b'\x00', b'\x23\x0d')  # panel setting for BWR/BWY
         self._command(b'\x61', b'\x98\x00\x98')  # resolution 152x152
         self._command(b'\x82', b'\x28')  # VCOM value
         self._command(b'\x50', b'\x97')  # VCOM and data interval
@@ -96,23 +110,32 @@
         self._wait()
         self._command(b'\x07\xa5')  # deep sleep
 
+    def clean(self):
+        #self._command(b'\x00', b'\x13\x0d')  # panel setting for BW
+        self._command(b'\x00', b'\x03\x0d')  # panel setting for BWR/BWY
+        self._command(b'\x12')  # refresh
+        #self._command(b'\x00', b'\x33\x0d')  # panel setting for BW
+        self._command(b'\x00', b'\x23\x0d')  # panel setting for BWR/BWY
+
     def update(self, block=True, fast=False):
         self._wait()
+        self._command(b'\x10', self.buffer)  # old data
+        self._command(b'\x11')  # data stop
         self._command(b'\x13', self.buffer)  # new data
         self._command(b'\x11')  # data stop
-        if fast and not self._fast:
-            self._lut(_LUT_FAST)
-            self._command(b'\x82', b'\x08')  # VCOM value
-            self._command(b'\x50', b'\x47')  # VCOM interval
-        elif not fast and self._fast:
-            self._lut(_LUT_FULL)
-            self._command(b'\x82', b'\x28')  # VCOM value
-            self._command(b'\x50', b'\x97')  # VCOM interval
+        if fast != self._fast:
+            self._fast = fast
+            if fast:
+                self._lut(_LUT_FAST)
+                self._command(b'\x82', b'\x08')  # VCOM value
+                self._command(b'\x50', b'\x47')  # VCOM interval
+            else:
+                self._lut(_LUT_FULL)
+                self._command(b'\x82', b'\x28')  # VCOM value
+                self._command(b'\x50', b'\x97')  # VCOM interval
         self._command(b'\x12')  # refresh
         if block:
             self._wait()
-        self._command(b'\x10', self.buffer)  # old data
-        self._command(b'\x11')  # data stop
 
     def pixel(self, x, y, color=None):
         if not 0 <= x < self.width or not 0 <= y < self.height:
@@ -125,3 +148,46 @@
             self.buffer[page + y * self._stride] |= mask
         else:
             self.buffer[page + y * self._stride] &= ~mask
+
+    def char(self, x, y, c, width=1, height=1, inverse=False):
+        x *= 6
+        if x >= self.width or y >= self._stride:
+            return
+        c = ord(c)
+        inverse = 0xff if c & 0x80 or inverse else 0x00
+        index = ((c & 0x7f) - 32) * 6
+        if not (0 <= index < len(_FONT)):
+            index = 0
+        for scan in range(index, index + 6):
+            byte = _FONT[scan] ^ 0xb3
+            if height > 1:
+                out = 0x00
+                for bit in range(8):
+                    if byte & (1 << bit):
+                        out |= (2 ** height - 1) << (bit * height)
+            else:
+                out = byte
+            for row in range(y, y + height):
+                if not 0 <= row < self._stride:
+                    break
+                for col in range(x, x + width):
+                    if not 0 <= col < 152:
+                        break
+                    self.buffer[(col + 1) * self._stride - 1 - row] = (
+                        out & 0xff) ^ inverse
+                out >>= 8
+            x += width
+
+    def text(self, text, row=0, col=0, width=1, height=1, inverse=False):
+        x = col
+        y = row
+        for c in text:
+            if c == '\n':
+                x = col
+                y += height
+                continue
+            self.char(x, y, c, width, height, inverse)
+            x += width
+            if x >= self.width // 6 - width:
+                x = col
+                y += height

--- a/main.py	Thu Apr 05 20:09:18 2018 +0200
+++ b/main.py	Thu Apr 05 20:45:06 2018 +0200
@@ -3,12 +3,11 @@
 import board
 import time
 import gdew0154t8
-import font86
 
 
 spi = busio.SPI(board.SCK, board.MOSI)
 spi.try_lock()
-spi.configure(baudrate=12000000)
+spi.configure(baudrate=24000000)
 
 dc = digitalio.DigitalInOut(board.MISO)
 dc.switch_to_output(value=1)
@@ -26,16 +25,6 @@
 display = gdew0154t8.Display(spi, dc, cs, busy)
 display.pixel(10, 10, 1)
 
-i = 32
-for y in range(19):
-    for x in range(25):
-        font86.put_char(display.buffer, chr(i), x, y)
-        i += 1
+display.text("Hello world!", width=6, height=3)
 display.update()
 
-for y in range(19):
-    for x in range(25):
-        font86.put_char(display.buffer, '*', x, y)
-        i += 1
-display.update()
-