mirror of
https://github.com/MarlinFirmware/Marlin.git
synced 2024-12-18 08:17:18 +00:00
60 lines
2.1 KiB
Python
60 lines
2.1 KiB
Python
#
|
|
# stm32_serialbuffer.py
|
|
#
|
|
Import("env")
|
|
|
|
# Marlin uses the `RX_BUFFER_SIZE` \ `TX_BUFFER_SIZE` options to
|
|
# configure buffer sizes for receiving \ transmitting serial data.
|
|
# Stm32duino uses another set of defines for the same purpose, so this
|
|
# script gets the values from the configuration and uses them to define
|
|
# `SERIAL_RX_BUFFER_SIZE` and `SERIAL_TX_BUFFER_SIZE` as global build
|
|
# flags so they are available for use by the platform.
|
|
#
|
|
# The script will set the value as the default one (64 bytes)
|
|
# or the user-configured one, whichever is higher.
|
|
#
|
|
# Marlin's default buffer sizes are 128 for RX and 32 for TX.
|
|
# The highest value is taken (128/64).
|
|
#
|
|
# If MF_*_BUFFER_SIZE, SERIAL_*_BUFFER_SIZE, USART_*_BUF_SIZE, are
|
|
# defined, the first of these values will be used as the minimum.
|
|
build_flags = env.ParseFlags(env.get('BUILD_FLAGS'))["CPPDEFINES"]
|
|
mf = env["MARLIN_FEATURES"]
|
|
|
|
# Get a build flag's value or None
|
|
def getBuildFlagValue(name):
|
|
for flag in build_flags:
|
|
if isinstance(flag, list) and flag[0] == name:
|
|
return flag[1]
|
|
|
|
return None
|
|
|
|
# Get an overriding buffer size for RX or TX from the build flags
|
|
def getInternalSize(side):
|
|
return getBuildFlagValue(f"MF_{side}_BUFFER_SIZE") or \
|
|
getBuildFlagValue(f"SERIAL_{side}_BUFFER_SIZE") or \
|
|
getBuildFlagValue(f"USART_{side}_BUF_SIZE")
|
|
|
|
# Get the largest defined buffer size for RX or TX
|
|
def getBufferSize(side, default):
|
|
# Get a build flag value or fall back to the given default
|
|
internal = int(getInternalSize(side) or default)
|
|
flag = side + "_BUFFER_SIZE"
|
|
# Return the largest value
|
|
return max(int(mf[flag]), internal) if flag in mf else internal
|
|
|
|
# Add a build flag if it's not already defined
|
|
def tryAddFlag(name, value):
|
|
if getBuildFlagValue(name) is None:
|
|
env.Append(BUILD_FLAGS=[f"-D{name}={value}"])
|
|
|
|
# Get the largest defined buffer sizes for RX or TX, using defaults for undefined
|
|
rxBuf = getBufferSize("RX", 128)
|
|
txBuf = getBufferSize("TX", 64)
|
|
|
|
# Provide serial buffer sizes to the stm32duino platform
|
|
tryAddFlag("SERIAL_RX_BUFFER_SIZE", rxBuf)
|
|
tryAddFlag("SERIAL_TX_BUFFER_SIZE", txBuf)
|
|
tryAddFlag("USART_RX_BUF_SIZE", rxBuf)
|
|
tryAddFlag("USART_TX_BUF_SIZE", txBuf)
|