update

buildroot/share/PlatformIO/boards/marlin_fysetc_s6.json

@@ -21,7 +21,7 @@
   "name": "3D Printer control board",
   "upload": {
     "maximum_ram_size": 131072,
-    "maximum_size": 524288,
+    "maximum_size": 458752,
     "protocol": "stlink",
     "protocols": [
       "jlink",

buildroot/share/PlatformIO/boards/marlin_fysetc_s6_8000.json

@@ -0,0 +1,35 @@
+{
+  "build": {
+    "cpu": "cortex-m4",
+    "extra_flags": "-DSTM32F446xx",
+    "f_cpu": "180000000L",
+    "mcu": "stm32f446ret6",
+    "variant": "MARLIN_FYSETC_S6"
+  },
+  "connectivity": [
+    "can"
+  ],
+  "debug": {
+    "jlink_device": "STM32F446RE",
+    "openocd_target": "stm32f4x",
+    "svd_path": "STM32F446x.svd"
+  },
+  "frameworks": [
+    "arduino",
+    "stm32cube"
+  ],
+  "name": "3D Printer control board",
+  "upload": {
+    "maximum_ram_size": 131072,
+    "maximum_size": 491520,
+    "protocol": "stlink",
+    "protocols": [
+      "jlink",
+      "stlink",
+      "blackmagic",
+      "serial"
+    ]
+  },
+  "url": "https://www.st.com/en/microcontrollers-microprocessors/stm32f446.html",
+  "vendor": "FYSETC"
+}

buildroot/share/PlatformIO/scripts/fix_framework_weakness.py

@@ -30,15 +30,3 @@ if env.MarlinFeatureIsEnabled("POSTMORTEM_DEBUGGING"):
         print("Done patching exception handler")
 
     print("Libmaple modified and ready for post mortem debugging")
-
-mf = env["MARLIN_FEATURES"]
-rxBuf = mf["RX_BUFFER_SIZE"] if "RX_BUFFER_SIZE" in mf else "0"
-txBuf = mf["TX_BUFFER_SIZE"] if "TX_BUFFER_SIZE" in mf else "0"
-if int(rxBuf) < 64:
-	rxBuf = "64"
-if int(txBuf) < 64:
-	txBuf = "64"
-
-build_flags = env.get('BUILD_FLAGS')
-build_flags.append("-DUSART_RX_BUF_SIZE=" + rxBuf + " -DUSART_TX_BUF_SIZE=" + txBuf)
-env.Replace(BUILD_FLAGS=build_flags)

buildroot/share/PlatformIO/scripts/stm32_serialbuffer.py

@@ -13,11 +13,16 @@ Import("env")
 #
 # The script will set the value as the default one (64 bytes)
 # or the user-configured one, whichever is higher.
+#
+# Marlin has 128 and 32 as default values for RX_BUFFER_SIZE and
+# TX_BUFFER_SIZE respectively. We use the highest value.
 mf = env["MARLIN_FEATURES"]
-rxBuf = str(max(64, int(mf["RX_BUFFER_SIZE"]) if "RX_BUFFER_SIZE" in mf else 0))
+rxBuf = str(max(128, 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)
+build_flags.append("-DUSART_RX_BUF_SIZE=" + rxBuf)
+build_flags.append("-DUSART_TX_BUF_SIZE=" + txBuf)
 env.Replace(BUILD_FLAGS=build_flags)