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mirror of https://github.com/mbirth/wipy-ussd1306.git synced 2024-12-24 22:44:05 +00:00

Added functions for low-level settings.

This commit is contained in:
Markus Birth 2016-02-28 23:42:45 +01:00
parent 6892c13ade
commit b737ff2eb5

View File

@ -69,11 +69,14 @@ class SSD1306:
self.i2c = i2c
self.pwr = pwr
self.osc_freq = 8
self.clock_div = 1
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.set_osc_freq(8, False) # set oscillator freq., but don't send to LCD yet
self.set_clock_div(1) # set clock div and send osc_freq+clock_div to LCD
self.set_mux_ratio(self.height) # set multiplex ratio to 64 (default), for 32px: 32
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)
@ -87,12 +90,36 @@ class SSD1306:
self.set_display(DISPLAY_NORMAL) # enables and sets disp to show RAM contents, not inversed
self.clear()
def set_power(self, power, set=True):
def set_power(self, power):
""" Sets the power mode of the LCD controller """
assert power in [self.POWER_UP, self.POWER_DOWN], "Power must be POWER_UP or POWER_DOWN."
self.power = power
self.command(power)
def _set_oscfreqclockdiv(self):
""" Sets the oscillator frequency and clock divider value """
value = (self.osc_freq << 4) | (self.clock_div-1)
self.command([0xd5, value])
def set_osc_freq(self, osc_freq, set=True):
""" Stores and sets the oscillator frequency """
assert 0 <= osc_freq < 16, "Oscillator frequency must be between 0 and 15."
self.osc_freq = osc_freq
if set:
self._set_oscfreqclockdiv()
def set_clock_div(self, clock_div, set=True):
""" Stores and sets clock divider """
assert 0 < clock_div <= 16, "Clock divider must be between 1 and 16."
self.clock_div = clock_div
if set:
self._set_oscfreqclockdiv()
def set_mux_ratio(self, mux_ratio):
""" Sets the multiplex ratio. """
assert 16 <= mux_ratio <= 64, "Mux ratio must be between 16 and 64."
self.command([0xa8, (mux_ratio-1)])
def set_adressing(self, addr):
""" Sets the adressing mode """
assert addr in [self.ADDRESSING_HORIZ, self.ADDRESSING_VERT, self.ADDRESSING_PAGE], "Addressing must be ADDRESSING_HORIZ, ADDRESSING_VERT or ADDRESSING_PAGE."