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# Mule
This directory includes tools for Mule STM32 Companion Controller.
The following tools are available:
- `mule.sh` script
- OpenOCD configuration file
## mule.sh
`mule.sh` is a helper script to control the on-module companion controller.
Parameters:
--reset - resets the Cortex M0
--dfu - enables DFU loader
--disable - keep Cortex M0 in reset
--flash [<firmware>] - flash the given firmware
### Dependencies
`mule.sh` requires following Debian packages:
```shell
apt-get install dfu-util usbutils
```
## OpenOCD
On RK3399 and A64 modules, GPIO based SWD support is available. A `openocd.cfg`
config file is provided for OpenOCD debugging tools.
openocd -f openocd.cfg
To select a specific board set the q7_module variable
openocd -c "set q7_module a64" -f openocd.cfg
OpenOCD in Debian Stretch and Ubuntu Xenial are missing the sysfsgpio
interface and you have to rebuild it from source.
Dependencies:
```
apt install git build-essential libtool autoconf automake
```
Compile:
git clone git://repo.or.cz/openocd.git openocd-code
cd openocd-code
./bootstrap
./configure --exec-prefix=$HOME/openocd --prefix=$HOME/openocd --enable-sysfsgpio
make && make install
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