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--- hamradio:mmdvm:pog [2018/12/01 17:51] – created philpem
+++ hamradio:mmdvm:pog [2019/08/14 02:31] – [In-system re-flash] philpem
@@ Line 1: / Line 1: @@
-====== MMDVM POG board ======
+====== MMDVM POG board mods and notes ======
 The [[https://github.com/wojciechk8/MMDVM_pog/|MMDVM POG]] board is a widely-available Raspberry Pi HAT. It uses an STM32F105R8T6 microcontroller with a simple analogue front-end to connect a Raspberry Pi to a radio transceiver.
@@ Line 30: / Line 30: @@
 It should now be possible to upgrade the board's firmware using the tools included with Pi-Star.
+To flash manually:
+<code>
+stm32flash -v -w firmware.bin -g 0x0 -R -i 20,-21,21:-20,21 /dev/ttyAMA0
+# -v: verify writes
+# -w: write flash from file
+# -g: start execution at specified address (after loading)
+# -R: reset device at exit
+# -i: GPIO sequence --
+#       enter with GPIO20 high and toggle GPIO21 L->H
+#       exit with GPIO20 low and GPIO21 H
+# /dev/ttyAMA0: Pi serial port
+#
+# default baud rate is 57600
+</code>