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Fixed driver issues with 128x64, made more readable #4

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Merged
merged 1 commit into from
Nov 8, 2019
Merged

Fixed driver issues with 128x64, made more readable #4

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53 changes: 29 additions & 24 deletions adafruit_ssd1305.py
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Original file line number Diff line number Diff line change
Expand Up @@ -25,7 +25,7 @@

Framebuf (non-displayio) driver for SSD1305 displays

* Author(s): Bryan Siepert, Tony DiCola, Michael McWethy
* Author(s): Melissa LeBlanc-Williamns, Bryan Siepert, Tony DiCola, Michael McWethy

Display init commands taken from
https://www.buydisplay.com/download/democode/ER-OLED022-1_I2C_DemoCode.txt
Expand Down Expand Up @@ -70,12 +70,16 @@
SET_COL_ADDR = const(0x21)
SET_PAGE_ADDR = const(0x22)
SET_DISP_START_LINE = const(0x40)
SET_LUT = const(0x91)
SET_SEG_REMAP = const(0xa0)
SET_MUX_RATIO = const(0xa8)
SET_MASTER_CONFIG = const(0xad)
SET_COM_OUT_DIR = const(0xc0)
SET_COMSCAN_DEC = const(0xc8)
SET_DISP_OFFSET = const(0xd3)
SET_COM_PIN_CFG = const(0xda)
SET_DISP_CLK_DIV = const(0xd5)
SET_AREA_COLOR = const(0xd8)
SET_PRECHARGE = const(0xd9)
SET_VCOM_DESEL = const(0xdb)
SET_CHARGE_PUMP = const(0x8d)
Expand All @@ -95,7 +99,9 @@ def __init__(self, buffer, width, height, *, external_vcc, reset):
if self.reset_pin:
self.reset_pin.switch_to_output(value=0)
self.pages = self.height // 8
self._column_offset = 4 # hardcoded for now...
self._column_offset = 0
if self.height == 32:
self._column_offset = 4 # hardcoded for now...
# Note the subclass must initialize self.framebuf to a framebuffer.
# This is necessary because the underlying data buffer is different
# between I2C and SPI implementations (I2C needs an extra byte).
Expand All @@ -105,27 +111,26 @@ def __init__(self, buffer, width, height, *, external_vcc, reset):
def init_display(self):
"""Base class to initialize display"""
for cmd in (
0xae | 0x00, # off
SET_DISP | 0x00, # off
# timing and driving scheme
0xd5, 0x80, #SET_DISP_CLK_DIV
0xa0 | 0x01, # column addr 127 mapped to SEG0 SET_SEG_REMAP
0xa8, self.height - 1, #SET_MUX_RATIO
0xd3, 0x00, #SET_DISP_OFFSET
0xad, 0x8e, #Set Master Configuration
0xd8, 0x05, #Set Area Color Mode On/Off & Low Power Display Mode
0x20, 0x00, # horizontal SET_MEM_ADDR ADD
0x40 | 0x00, #SET_DISP_START_LINE ADD
0xa1, #set segment re-map 128 to 0
0xC8, #Set COM Output Scan Direction 64 to 1
0xda, 0x12, #SET_COM_PIN_CFG
0x91, 0x3f, 0x3f, 0x3f, 0x3f,#Current drive pulse width of BANK0, Color A, Band C.
0x81, 0xff, # maximum SET_CONTRAST to maximum
0xd9, 0xd2, #SET_PRECHARGE orig: 0xd9, 0x22 if self.external_vcc else 0xf1,
0xdb, 0x34, #SET_VCOM_DESEL 0xdb, 0x30, $ 0.83* Vcc
0xa6, # not inverted SET_NORM_INV
0xa4, # output follows RAM contents SET_ENTIRE_ON
0x8d, 0x10 if self.external_vcc else 0x14, #SET_CHARGE_PUMP
0xaf): #//--turn on oled panel
SET_DISP_CLK_DIV, 0x80, #SET_DISP_CLK_DIV
SET_SEG_REMAP | 0x01, # column addr 127 mapped to SEG0 SET_SEG_REMAP
SET_MUX_RATIO, self.height - 1, #SET_MUX_RATIO
SET_DISP_OFFSET, 0x00, #SET_DISP_OFFSET
SET_MASTER_CONFIG, 0x8e, #Set Master Configuration
SET_AREA_COLOR, 0x05, #Set Area Color Mode On/Off & Low Power Display Mode
SET_MEM_ADDR, 0x00, # horizontal SET_MEM_ADDR ADD
SET_DISP_START_LINE | 0x00, 0x2E, #SET_DISP_START_LINE ADD
SET_COMSCAN_DEC, #Set COM Output Scan Direction 64 to 1
SET_COM_PIN_CFG, 0x12, #SET_COM_PIN_CFG
SET_LUT, 0x3f, 0x3f, 0x3f, 0x3f,#Current drive pulse width of BANK0, Color A, B, C
SET_CONTRAST, 0xff, # maximum SET_CONTRAST to maximum
SET_PRECHARGE, 0xd2, #SET_PRECHARGE orig: 0xd9, 0x22 if self.external_vcc else 0xf1,
SET_VCOM_DESEL, 0x34, #SET_VCOM_DESEL 0xdb, 0x30, $ 0.83* Vcc
SET_NORM_INV, # not inverted SET_NORM_INV
SET_ENTIRE_ON, # output follows RAM contents SET_ENTIRE_ON
SET_CHARGE_PUMP, 0x10 if self.external_vcc else 0x14, #SET_CHARGE_PUMP
SET_DISP | 0x01): #//--turn on oled panel
self.write_cmd(cmd)
self.fill(0)
self.show()
Expand Down Expand Up @@ -171,8 +176,8 @@ def show(self):
xpos0 += 32
xpos1 += 32
self.write_cmd(SET_COL_ADDR)
self.write_cmd(xpos0+self._column_offset)
self.write_cmd(xpos1+self._column_offset)
self.write_cmd(xpos0 + self._column_offset)
self.write_cmd(xpos1 + self._column_offset)
self.write_cmd(SET_PAGE_ADDR)
self.write_cmd(0)
self.write_cmd(self.pages - 1)
Expand Down