paralleldisplay
– Native helpers for driving parallel displays
Available on these boards
- class paralleldisplay.ParallelBus(*, data0: microcontroller.Pin, command: microcontroller.Pin, chip_select: microcontroller.Pin, write: microcontroller.Pin, read: microcontroller.Pin | None, reset: microcontroller.Pin | None = None, frequency: int = 30000000)
Manage updating a display over 8-bit parallel bus in the background while Python code runs. This protocol may be referred to as 8080-I Series Parallel Interface in datasheets. It doesn’t handle display initialization.
Create a ParallelBus object associated with the given pins. The bus is inferred from data0 by implying the next 7 additional pins on a given GPIO port.
The parallel bus and pins are then in use by the display until
displayio.release_displays()
is called even after a reload. (It does this so CircuitPython can use the display after your code is done.) So, the first time you initialize a display bus in code.py you should calldisplayio.release_displays()
first, otherwise it will error after the first code.py run.- Parameters:
data_pins (microcontroller.Pin) – A list of data pins. Specify exactly one of
data_pins
ordata0
.data0 (microcontroller.Pin) – The first data pin. The rest are implied
command (microcontroller.Pin) – Data or command pin
chip_select (microcontroller.Pin) – Chip select pin
write (microcontroller.Pin) – Write pin
read (microcontroller.Pin) – Read pin, optional
reset (microcontroller.Pin) – Reset pin, optional
frequency (int) – The communication frequency in Hz for the display on the bus