🔨 MKS Robin E3 for HAL/STM32 (#21927)

buildroot/share/PlatformIO/scripts/stm32_serialbuffer.py

@@ -0,0 +1,23 @@
+#
+# stm32_serialbuffer.py
+#
+Import("env")
+
+# Marlin has `RX_BUFFER_SIZE` and `TX_BUFFER_SIZE` to configure the
+# buffer size for receiving and transmitting data respectively.
+# Stm32duino uses another set of defines for the same purpose,
+# so we get the values from the Marlin configuration and set
+# them in `SERIAL_RX_BUFFER_SIZE` and `SERIAL_TX_BUFFER_SIZE`.
+# It is not possible to change the values at runtime, they must
+# be set with build flags.
+#
+# The script will set the value as the default one (64 bytes)
+# or the user-configured one, whichever is higher.
+mf = env["MARLIN_FEATURES"]
+rxBuf = str(max(64, int(mf["RX_BUFFER_SIZE"]) if "RX_BUFFER_SIZE" in mf else 0))
+txBuf = str(max(64, int(mf["TX_BUFFER_SIZE"]) if "TX_BUFFER_SIZE" in mf else 0))
+
+build_flags = env.get('BUILD_FLAGS')
+build_flags.append("-DSERIAL_RX_BUFFER_SIZE=" + rxBuf)
+build_flags.append("-DSERIAL_TX_BUFFER_SIZE=" + txBuf)
+env.Replace(BUILD_FLAGS=build_flags)