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************
Maple Mini
************
Programming with OpenOCD
========================
The Maple Mini can be programmed using OpenOCD_ and a suitable
programmer.
.. _OpenOCD: https://openocd.sourceforge.io/
To program a Maple Mini the following PINs should be connected:
==== ===
Prog MM
==== ===
GND GND
3V3 Vcc
MOSI D22
CLK D21
==== ===
If the maple mini still has the original firmware it may be necessary to
press and hold the button (at least 1 s) while resetting the board, to
enter DMU mode.
Create the file ``openocd.cfg`` according to the programmer you are
using, and then run::
openocd -f openocd.cfg
telnet localhost 4444
To then write ``<binary>.elf`` to the Maple Mini use the following
commands::
reset halt
stm32f1x unlock 0
reset halt
flash write_image erase <binary>.elf
stm32f1x lock 0
reset halt
With an ST-Link V2 Clone from Baite
-----------------------------------
The required PINs on the ST-Link V2 Clone from Baite are as follows,
with the notch on the left::
+------+
| 1 2 | 3V3
5V | 3 4 | CLK (MM 21)
5 6 | MOSI (MM 22)
GND | 7 8 |
| 9 10 |
+------+
``openocd.cfg`` should have the following contents::
source [find interface/stlink.cfg]
source [find target/stm32f1x.cfg]
With a Bus Pirate v3.6
----------------------
``openocd.cfg`` should have the following contents::
source [find interface/buspirate.cfg]
buspirate_port /dev/ttyUSB0
buspirate_vreg 1
buspirate_mode normal
transport select swd
source [find target/stm32f1x.cfg]
Programmin with gnuk/tool/stlinkv2.py
=====================================
gnuk also provides a tool to write binaries; first the board should be
unlocked with::
./stlinkv2.py -u
then reset (while pressing the button), and the flash erased::
./stlinkv2.py -e
and finally it can be written with::
./stlinkv2.py <binary>.elf
See also
========
* https://web.archive.org/web/20150502182337/http://nodonogard.blogspot.com/2014/08/writting-gnuk-binary-to-fst-01-using-st.html
* https://www.earth.li/~noodles/blog/2017/02/gnuk-on-maple-mini.html
* https://www.earth.li/~noodles/blog/2015/08/program-fst01-with-buspirate.html
* https://enricorossi.org/blog/2020/flash_programming_stm32_maple_mini/
..
vim: set filetype=rst:
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