added script for demonstrating how to flash with openocd

tools/scripts/flash_firmware.cfg

@@ -0,0 +1,38 @@
+# an openocd config file for flashing both bootloader and main firmware for AM32
+# This assumes you have a bootloader image in bl.bin and a main firmware in fw.bin
+# this script may be useful as part of a production line testing system
+
+# first off uncomment for the type of debug adapter you have
+source [find interface/stlink.cfg]
+#source [find interface/cmsis-dap.cfg]
+#source [find interface/jlink.cfg]
+
+# now uncomment the right line for which MCU your ESC uses
+#source [find target/stm32f0x.cfg] # for F031 or F051
+#source [find target/at32f415xx.cfg]
+#source [find target/at32f421xx.cfg]
+#source [find target/gd32e23x.cfg] # for E230
+#source [find target/stm32g0x.cfg]
+source [find target/stm32l4x.cfg]
+
+# initialise
+init
+halt
+
+# now erase all of flash
+echo "erasing"
+flash erase_sector 0 0 last
+
+# now flash the bootloader, just comment out these lines if you don't
+# want to flash the bootloader
+echo "Flashing bootloader"
+flash write_bank 0 bl.bin 0x0
+flash verify_bank 0 bl.bin 0x0
+
+# now flash and verify the main firmware
+echo "Flashing main firmware"
+flash write_bank 0 fw.bin 0x1000
+flash verify_bank 0 fw.bin 0x1000
+
+echo "Success!"
+exit