diff options
Diffstat (limited to 'drivers/display/ssd1306.py')
| -rw-r--r-- | drivers/display/ssd1306.py | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/display/ssd1306.py b/drivers/display/ssd1306.py index 85e2bf0cb..a504cdadc 100644 --- a/drivers/display/ssd1306.py +++ b/drivers/display/ssd1306.py @@ -15,6 +15,7 @@ SET_PAGE_ADDR = const(0x22) SET_DISP_START_LINE = const(0x40) SET_SEG_REMAP = const(0xA0) SET_MUX_RATIO = const(0xA8) +SET_IREF_SELECT = const(0xAD) SET_COM_OUT_DIR = const(0xC0) SET_DISP_OFFSET = const(0xD3) SET_COM_PIN_CFG = const(0xDA) @@ -63,6 +64,8 @@ class SSD1306(framebuf.FrameBuffer): 0xFF, # maximum SET_ENTIRE_ON, # output follows RAM contents SET_NORM_INV, # not inverted + SET_IREF_SELECT, + 0x30, # enable internal IREF during display on # charge pump SET_CHARGE_PUMP, 0x10 if self.external_vcc else 0x14, @@ -92,10 +95,11 @@ class SSD1306(framebuf.FrameBuffer): 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 + if self.width != 128: + # narrow displays use centred columns + col_offset = (128 - self.width) // 2 + x0 += col_offset + x1 += col_offset self.write_cmd(SET_COL_ADDR) self.write_cmd(x0) self.write_cmd(x1) |