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drivers/display/ssd1306: Add width arg and support 64px wide displays. 

In particular, the WeMOS D1 Mini board comes with a shield that has a
64x48 OLED display. This patch makes it display properly, with the upper
left pixel being at (0, 0) and not (32, 0).

I tried to do this with the configuration commands, but there doesn't
seem to be a command that would set the column offset (there is one for
the line offset, though).
uheapq-ticks
Radomir Dopieralski 2016-06-14 10:50:29 +02:00 committed by Damien George
parent eb7637ba2e
commit ab8a5d5199
1 changed files with 14 additions and 8 deletions
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22
drivers/display/ssd1306.py
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@ -25,8 +25,8 @@ SET_CHARGE_PUMP = const(0x8d)
class SSD1306:
def __init__(self, height, external_vcc):
self.width = 128
def __init__(self, width, height, external_vcc):
self.width = width
self.height = height
self.external_vcc = external_vcc
self.pages = self.height // 8
@ -73,9 +73,15 @@ class SSD1306:
self.write_cmd(SET_NORM_INV | (invert & 1))
def show(self):
x0 = 0
x1 = self.width - 1
if self.width == 64:
# displays with width of 64 pixels are shifted by 32
x0 += 32
x1 += 32
self.write_cmd(SET_COL_ADDR)
self.write_cmd(0)
self.write_cmd(self.width - 1)
self.write_cmd(x0)
self.write_cmd(x1)
self.write_cmd(SET_PAGE_ADDR)
self.write_cmd(0)
self.write_cmd(self.pages - 1)
@ -95,11 +101,11 @@ class SSD1306:
class SSD1306_I2C(SSD1306):
def __init__(self, height, i2c, addr=0x3c, external_vcc=False):
def __init__(self, width, height, i2c, addr=0x3c, external_vcc=False):
self.i2c = i2c
self.addr = addr
self.temp = bytearray(2)
super().__init__(height, external_vcc)
super().__init__(width, height, external_vcc)
def write_cmd(self, cmd):
self.temp[0] = 0x80 # Co=1, D/C#=0
@ -119,7 +125,7 @@ class SSD1306_I2C(SSD1306):
class SSD1306_SPI(SSD1306):
def __init__(self, height, spi, dc, res, cs, external_vcc=False):
def __init__(self, width, height, spi, dc, res, cs, external_vcc=False):
self.rate = 10 * 1024 * 1024
dc.init(dc.OUT, value=0)
res.init(res.OUT, value=0)
@ -128,7 +134,7 @@ class SSD1306_SPI(SSD1306):
self.dc = dc
self.res = res
self.cs = cs
super().__init__(height, external_vcc)
super().__init__(width, height, external_vcc)
def write_cmd(self, cmd):
self.spi.init(baudrate=self.rate, polarity=0, phase=0)