Add manual NPCX EC UART flash

Signed-off-by: Daniel Schaefer <dhs@frame.work>

Author: JohnAZoidberg

scripts/flash_manual_ec.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+
+# Only works on NPCX EC chips
+# Every Framework system, except 11-13th Gen Intel
+#
+# Using bare UART adapter with manual reset/flashmode buttons
+# Usage:
+# 0. Connect USB-UART adapter to EC UART (TX, RX, GND)
+# 1. Hold down flashmode button (5.1k from EC UART TX to GND)
+# 2. Press and release EC reset button (RST short to GND)
+# 3. Run this script to flash
+#    ./flash_manual_ec.sh ~/Downloads/sunflower/
+#    Where the folder contains ec.bin and npcx_monitor.bin
+#    If the adapter shows up at a different port, set it in an environment variable:
+#    env FLASHUART=ttyUSB1 ./flash_manual_ec.sh ~/Downloads/sunflower/
+# 4. Press and release EC reset button to boot EC again
+
+FLASHUART=ttyUSB0
+
+FLASH_SRC="$1/ec.bin"
+MONITOR="$1/npcx_monitor.bin"
+echo "USING ${FLASH_SRC} to flash EC"
+
+#### DO FLASH
+echo "Using NUVOTON Tool ./uartupdatetool" 
+./uartupdatetool --port ${FLASHUART} --opr wr --addr 0x200c3020 --file ${MONITOR}
+./uartupdatetool --port ${FLASHUART} --opr wr --auto --addr 0x0000 --file ${FLASH_SRC}