diff options
Diffstat (limited to 'shared-bindings/displayio')
| -rw-r--r-- | shared-bindings/displayio/Display.c | 22 | ||||
| -rw-r--r-- | shared-bindings/displayio/EPaperDisplay.c | 11 |
2 files changed, 18 insertions, 15 deletions
diff --git a/shared-bindings/displayio/Display.c b/shared-bindings/displayio/Display.c index 1ed59f233..8d1a888fe 100644 --- a/shared-bindings/displayio/Display.c +++ b/shared-bindings/displayio/Display.c @@ -58,24 +58,26 @@ //| r"""Create a Display object on the given display bus (`FourWire`, `ParallelBus` or `I2CDisplay`). //| //| The ``init_sequence`` is bitpacked to minimize the ram impact. Every command begins with a -//| command byte followed by a byte to determine the parameter count and if a delay is need after. -//| When the top bit of the second byte is 1, the next byte will be the delay time in milliseconds. -//| The remaining 7 bits are the parameter count excluding any delay byte. The third through final -//| bytes are the remaining command parameters. The next byte will begin a new command definition. -//| Here is a portion of ILI9341 init code: +//| command byte followed by a byte to determine the parameter count and delay. When the top bit +//| of the second byte is 1 (0x80), a delay will occur after the command parameters are sent. +//| The remaining 7 bits are the parameter count excluding any delay byte. The bytes following +//| are the parameters. When the delay bit is set, a single byte after the parameters specifies +//| the delay duration in milliseconds. The value 0xff will lead to an extra long 500 ms delay +//| instead of 255 ms. The next byte will begin a new command definition. +//| Here is an example: //| //| .. code-block:: python //| //| init_sequence = (b"\xe1\x0f\x00\x0E\x14\x03\x11\x07\x31\xC1\x48\x08\x0F\x0C\x31\x36\x0F" # Set Gamma //| b"\x11\x80\x78"# Exit Sleep then delay 0x78 (120ms) -//| b"\x29\x80\x78"# Display on then delay 0x78 (120ms) +//| b"\x29\x81\xaa\x78"# Display on then delay 0x78 (120ms) //| ) //| display = displayio.Display(display_bus, init_sequence, width=320, height=240) //| -//| The first command is 0xe1 with 15 (0xf) parameters following. The second and third are 0x11 and -//| 0x29 respectively with delays (0x80) of 120ms (0x78) and no parameters. Multiple byte literals -//| (b"") are merged together on load. The parens are needed to allow byte literals on subsequent -//| lines. +//| The first command is 0xe1 with 15 (0xf) parameters following. The second is 0x11 with 0 +//| parameters and a 120ms (0x78) delay. The third command is 0x29 with one parameter 0xaa and a +//| 120ms delay (0x78). Multiple byte literals (b"") are merged together on load. The parens +//| are needed to allow byte literals on subsequent lines. //| //| The initialization sequence should always leave the display memory access inline with the scan //| of the display to minimize tearing artifacts. diff --git a/shared-bindings/displayio/EPaperDisplay.c b/shared-bindings/displayio/EPaperDisplay.c index e0326d9c8..8518e3714 100644 --- a/shared-bindings/displayio/EPaperDisplay.c +++ b/shared-bindings/displayio/EPaperDisplay.c @@ -65,11 +65,12 @@ //| """Create a EPaperDisplay object on the given display bus (`displayio.FourWire` or `displayio.ParallelBus`). //| //| The ``start_sequence`` and ``stop_sequence`` are bitpacked to minimize the ram impact. Every -//| command begins with a command byte followed by a byte to determine the parameter count and if -//| a delay is need after. When the top bit of the second byte is 1, the next byte will be the -//| delay time in milliseconds. The remaining 7 bits are the parameter count excluding any delay -//| byte. The third through final bytes are the remaining command parameters. The next byte will -//| begin a new command definition. +//| command begins with a command byte followed by a byte to determine the parameter count and +//| delay. When the top bit of the second byte is 1 (0x80), a delay will occur after the command +//| parameters are sent. The remaining 7 bits are the parameter count excluding any delay +//| byte. The bytes following are the parameters. When the delay bit is set, a single byte after +//| the parameters specifies the delay duration in milliseconds. The value 0xff will lead to an +//| extra long 500 ms delay instead of 255 ms. The next byte will begin a new command definition. //| //| :param display_bus: The bus that the display is connected to //| :type _DisplayBus: displayio.FourWire or displayio.ParallelBus |