mbirth/wipy-ussd1306
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More low-level functions.

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This commit is contained in:
Markus Birth 2016-03-22 17:52:00 +01:00
parent b79ad1b4cc
commit 323a3a4ef0
1 changed files with 18 additions and 3 deletions
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21
ussd1306-i2c.py
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@ -79,10 +79,10 @@ class SSD1306:
self.set_mux_ratio(self.height) # set multiplex ratio to 64 (default), for 32px: 32 self.set_mux_ratio(self.height) # set multiplex ratio to 64 (default), for 32px: 32
self.set_disp_offset(0) # set display offset to 0 self.set_disp_offset(0) # set display offset to 0
self.set_disp_start_line(0) # set display start line to 0 self.set_disp_start_line(0) # set display start line to 0
self.command([0x8d, 0x14]) # chargepump on (ext. VCC - off: 0x10) self.set_chargepump_enabled(True) # chargepump on (ext. VCC: off)
self.set_addressing(self.ADDRESSING_HORIZ) self.set_addressing(self.ADDRESSING_HORIZ)
self.command(0xa0|0x10) # segment remap (invalid value: 0xb0, maybe 0x01?) self.set_segment_remap_enabled(False)
self.command(0xc8) # com scan dir decreasing (inc.: 0xc0) self.set_com_output_scan_dir_remap_enabled(False)
self.command([0xda, 0x12]) # com pins (for 32px: 0x02) self.command([0xda, 0x12]) # com pins (for 32px: 0x02)
self.set_contrast(255) self.set_contrast(255)
self.command([0xd9, 0xf1]) # precharge (ext. VCC: 0x22 = RESET) self.command([0xd9, 0xf1]) # precharge (ext. VCC: 0x22 = RESET)
@ -96,6 +96,21 @@ class SSD1306:
self.power = power self.power = power
self.command(power) self.command(power)
def set_com_output_scan_dir_remap_enabled(self, status):
""" Enables or disables COM output scan direction remapping. """
assert isinstance(status, bool), "Status must be True or False."
self.command((0xc8 if status else 0xc0))
def set_segment_remap_enabled(self, status):
""" Enables or disables segment remapping. """
assert isinstance(status, bool), "Status must be True or False."
self.command((0xa1 if status else 0xa0))
def set_chargepump_enabled(self, status):
""" Enables or disables the charge pump. """
assert isinstance(status, bool), "Status must be True or False."
self.command([0x8d, (0x14 if status else 0x10)])
def _set_oscfreqclockdiv(self): def _set_oscfreqclockdiv(self):
""" Sets the oscillator frequency and clock divider value """ """ Sets the oscillator frequency and clock divider value """
value = (self.osc_freq << 4) | (self.clock_div-1) value = (self.osc_freq << 4) | (self.clock_div-1)