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-rw-r--r--electronics/stm32.txt32
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diff --git a/electronics/stm32.txt b/electronics/stm32.txt
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+
+Debugging
+================
+
+Access all registers:
+
+ (gdb) x/x 0xE000ED14
+ 0xe000ed14: Cannot access memory at address 0xe000ed14
+ (gdb)
+ 0xe000ed18: Cannot access memory at address 0xe000ed18
+ (gdb) show mem inaccessible-by-default
+ Unknown memory addresses will be treated as inaccessible.
+ (gdb) set mem inaccessible-by-default off
+ (gdb) x/x 0xE000ED14
+ 0xe000ed14: 0x00000200
+
+Uploading via SWD
+====================
+
+upload_blackmagic.sh:
+
+ #!/bin/bash
+ arm-none-eabi-gdb build/stm32f401cc_telemetry.elf < load_blackmagic.gdb
+ sleep 1.0
+
+load_blackmagic.gdb:
+
+ target extended-remote /dev/ttyACM0
+ monitor swdp_scan
+ attach 1
+ load
+ quit