mbirth/wipy-ussd1306
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Complete init sequence.

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This commit is contained in:
Markus Birth 2016-02-10 15:55:34 +01:00
parent 10bb48b95a
commit 6892c13ade
1 changed files with 16 additions and 18 deletions
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34
ussd1306-i2c.py
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@ -70,23 +70,21 @@ class SSD1306:
self.i2c = i2c
self.pwr = pwr
self.power_on()
# set disp off : 0xae
# set clock div : 0xd5, 0x80
# set multiplex : 0xa8, 0x3f (for 32px: 0x1f)
# set disp offset: 0xd3 0x00
# set start line : 0x40|0x00
# chargepump on : 0x8d, 0x14 (ext. VCC: 0x10)
# memory mode : 0x20, 0x00
# segment remap : 0xa0|0x10 (invalid value: 0xb0, maybe 0x01?)
# com scan dir : 0xc8 (decreasing, inc.: 0xc0)
# com pins : 0xda, 0x12 (for 32px: 0x02)
# contrast : 0x81, 0xff
# precharge : 0xd9, 0xf1 (ext. VCC: 0x22 = RESET)
# Vcom deselect : 0xdb, 0x40
# disp resume ram: 0xa4
# disp not invers: 0xa6
# set disp on : 0xaf
self.power_on() # enable power to the display
self.set_power(self.POWER_DOWN) # set display to sleep mode
self.command([0xd5, 0x80]) # set clock divider
self.command([0xa8, 0x3f]) # set multiplex to 0x3f (for 32px: 0x1f)
self.command([0xd3, 0x00]) # set disp offset to 0
self.command(0x40|0x00) # set start line to 0
self.command([0x8d, 0x14]) # chargepump on (ext. VCC - off: 0x10)
self.set_addressing(self.ADDRESSING_HORIZ)
self.command(0xa0|0x10) # segment remap (invalid value: 0xb0, maybe 0x01?)
self.command(0xc8) # com scan dir decreasing (inc.: 0xc0)
self.command([0xda, 0x12]) # com pins (for 32px: 0x02)
self.set_contrast(255)
self.command([0xd9, 0xf1]) # precharge (ext. VCC: 0x22 = RESET)
self.command([0xdb, 0x40]) # Vcom deselect
self.set_display(DISPLAY_NORMAL) # enables and sets disp to show RAM contents, not inversed
self.clear()
def set_power(self, power, set=True):
@ -109,7 +107,7 @@ class SSD1306:
def set_contrast(self, value):
""" set OLED contrast """
assert 0x00 <= value <= 0xff, "Contrast value must be between 0x00 and 0xff"
assert 0x00 <= value <= 0xff, "Contrast value must be between 0 and 255"
self.command([0x81, value])
def position(self, x, y):