mbirth/wipy-ussd1306
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Code Issues Releases Wiki Activity

Fix remaining bugs, first working version.

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This commit is contained in:
Markus Birth 2016-03-31 02:49:50 +02:00
parent 041bad00d3
commit ec958f3808
1 changed files with 23 additions and 17 deletions
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40
ussd1306-i2c.py → ussd1306_i2c.py
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@ -42,14 +42,14 @@ class SSD1306:
ADDRESSING_PAGE = 0x02 ADDRESSING_PAGE = 0x02
POWER_UP = 0xaf POWER_UP = 0xaf
POWER_DOWN = 0xae POWER_DOWN = 0xae
DISPLAY_BLANK = 0xae DISPLAY_BLANK = [0xae]
DISPLAY_ALL = 0xa5 DISPLAY_ALL = [0xa5]
DISPLAY_NORMAL = [0xa4, 0xa6, 0xaf] DISPLAY_NORMAL = [0xa4, 0xa6, 0xaf]
DISPLAY_INVERSE = 0xa7 DISPLAY_INVERSE = [0xa7]
DC_CMD = 0x80 DC_CMD = 0x80
DC_DATA = 0x40 DC_DATA = 0x40
def __init__(self, i2c, pwr=None, devid=0x3c): def __init__(self, i2c, pins=('GP15', 'GP10'), pwr=None, devid=0x3c):
self.width = 128 self.width = 128
self.height = 64 self.height = 64
self.devid = devid self.devid = devid
@ -58,7 +58,7 @@ class SSD1306:
self.display_mode = self.DISPLAY_NORMAL self.display_mode = self.DISPLAY_NORMAL
# init the I2C bus and pins # init the I2C bus and pins
i2c.init(i2c.MASTER, baudrate=400000) # 400 kHz i2c.init(i2c.MASTER, baudrate=400000, pins=pins) # 400 kHz
if pwr: if pwr:
if "OUT_PP" in dir(pwr): if "OUT_PP" in dir(pwr):
# pyBoard style # pyBoard style
@ -85,16 +85,16 @@ class SSD1306:
self.set_clock_div(1) # set clock div and send osc_freq+clock_div to LCD self.set_clock_div(1) # set clock div and send osc_freq+clock_div to LCD
self.set_chargepump_enabled(True) # chargepump on (ext. VCC: off) self.set_chargepump_enabled(True) # chargepump on (ext. VCC: off)
self.set_addressing(self.ADDRESSING_HORIZ) self.set_addressing(self.ADDRESSING_HORIZ)
self.set_precharge_period(15, 1) # with ext. VCC: 2, 2 (RESET) self.set_precharge_period(1, 15) # with ext. VCC: 2, 2 (RESET)
self.set_vcomh_deselect_level(4) self.set_vcomh_deselect_level(4)
self.set_display(DISPLAY_NORMAL) # enables and sets disp to show RAM contents, not inversed self.set_display(self.DISPLAY_NORMAL) # enables and sets disp to show RAM contents, not inversed
self.clear() self.clear()
def set_power(self, power): def set_power(self, power):
""" Sets the power mode of the LCD controller """ """ 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." assert power in [self.POWER_UP, self.POWER_DOWN], "Power must be POWER_UP or POWER_DOWN."
self.power = power self.power = power
self.command(power) self.command([power])
def set_vcomh_deselect_level(self, level): def set_vcomh_deselect_level(self, level):
""" Sets the Vcomh deselect level. """ """ Sets the Vcomh deselect level. """
@ -124,12 +124,12 @@ class SSD1306:
def set_com_output_scan_dir_remap_enabled(self, status): def set_com_output_scan_dir_remap_enabled(self, status):
""" Enables or disables COM output scan direction remapping. """ """ Enables or disables COM output scan direction remapping. """
assert isinstance(status, bool), "Status must be True or False." assert isinstance(status, bool), "Status must be True or False."
self.command((0xc8 if status else 0xc0)) self.command([(0xc8 if status else 0xc0)])
def set_segment_remap_enabled(self, status): def set_segment_remap_enabled(self, status):
""" Enables or disables segment remapping. """ """ Enables or disables segment remapping. """
assert isinstance(status, bool), "Status must be True or False." assert isinstance(status, bool), "Status must be True or False."
self.command((0xa1 if status else 0xa0)) self.command([(0xa1 if status else 0xa0)])
def set_chargepump_enabled(self, status): def set_chargepump_enabled(self, status):
""" Enables or disables the charge pump. """ """ Enables or disables the charge pump. """
@ -168,9 +168,9 @@ class SSD1306:
def set_disp_start_line(self, start_line): def set_disp_start_line(self, start_line):
""" Sets the display RAM start line register. """ """ Sets the display RAM start line register. """
assert 0 <= start_line < 63, "Start line must be between 0 and 63." assert 0 <= start_line < 63, "Start line must be between 0 and 63."
self.command(0x40 | start_line) self.command([0x40 | start_line])
def set_adressing(self, addr): def set_addressing(self, addr):
""" Sets the adressing mode """ """ 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." assert addr in [self.ADDRESSING_HORIZ, self.ADDRESSING_VERT, self.ADDRESSING_PAGE], "Addressing must be ADDRESSING_HORIZ, ADDRESSING_VERT or ADDRESSING_PAGE."
self.addressing = addr self.addressing = addr
@ -180,7 +180,7 @@ class SSD1306:
""" Sets display mode (blank, black, normal, inverse) """ """ Sets display mode (blank, black, normal, inverse) """
assert display_mode in [self.DISPLAY_BLANK, self.DISPLAY_ALL, self.DISPLAY_NORMAL, self.DISPLAY_INVERSE], "Mode must be one of DISPLAY_BLANK, DISPLAY_ALL, DISPLAY_NORMAL or DISPLAY_INVERSE." assert display_mode in [self.DISPLAY_BLANK, self.DISPLAY_ALL, self.DISPLAY_NORMAL, self.DISPLAY_INVERSE], "Mode must be one of DISPLAY_BLANK, DISPLAY_ALL, DISPLAY_NORMAL or DISPLAY_INVERSE."
self.display_mode = display_mode self.display_mode = display_mode
self.command([display_mode]) self.command(display_mode)
def set_contrast(self, value): def set_contrast(self, value):
""" set OLED contrast """ """ set OLED contrast """
@ -191,7 +191,7 @@ class SSD1306:
""" set cursor to page y, column x """ """ set cursor to page y, column x """
assert 0 <= x < self.width, "x must be between 0 and 127" assert 0 <= x < self.width, "x must be between 0 and 127"
assert 0 <= y < self.height // 8, "y must be between 0 and 7" assert 0 <= y < self.height // 8, "y must be between 0 and 7"
self.command([0x20, 0x00, x, 0x21, 0x00, y]) self.command([0x21, x, 0x7f, 0x22, y, 0x07])
def clear(self): def clear(self):
""" clear screen """ """ clear screen """
@ -214,7 +214,7 @@ class SSD1306:
def power_on(self): def power_on(self):
if self.pwr: if self.pwr:
self.pwr.value(1) self.pwr.value(1)
self.reset() #self.reset()
def reset(self): def reset(self):
""" issue reset impulse to reset the display """ """ issue reset impulse to reset the display """
@ -245,7 +245,11 @@ class SSD1306:
def command(self, arr): def command(self, arr):
""" send bytes in command mode """ """ send bytes in command mode """
self.bitmap(arr, self.DC_CMD) arr2 = []
for i in arr:
arr2.append(self.DC_CMD)
arr2.append(i)
self.bitmap(arr2[1::], self.DC_CMD)
def data(self, arr): def data(self, arr):
""" send bytes in data mode """ """ send bytes in data mode """
@ -253,6 +257,8 @@ class SSD1306:
def bitmap(self, arr, dc): def bitmap(self, arr, dc):
arr = [dc] + arr arr = [dc] + arr
#print(repr(arr))
buf = struct.pack('B'*len(arr), *arr) buf = struct.pack('B'*len(arr), *arr)
self.i2c.send(buf, addr=self.devid, timeout=5000) print(repr(buf))
self.i2c.writeto(self.devid, buf)