This project has the main propose to work as gpio expander over I2C protocol. It uses the mcu STM32F103C8T6 with cortex-M3. Here, we have the make file to build, flash e monitor the project.
- st link to flash, debug and traceswo
Follow the link: https://github.com/stlink-org/stlink
apt install stlink-tools gdb-multiarch openocd
Install arm-none-eabi compiler available on ARM oficial site.
Go to session x86_64 Linux hosted cross toolchains and choose AArch32 bare-metal target (arm-none-eabi)
Test the openocd and st-link V2 with the following command:
$ openocd -f interface/stlink.cfg -f target/stm32f1x.cfg
Run the gdb
$ gdb-multiarch build/filename.elf
And type
(gdb) target extended-remote localhost:3333
Follow the instructions into https://github.com/xpack-dev-tools/openocd
Install the latest xpm (https://xpack.github.io/xpm/install/)
sudo npm install --global xpm@latest
install xpack-dev-tools https://xpack.github.io/openocd/install/ https://www.npmjs.com/package/@xpack-dev-tools/openocd for eclipse use
xpm install --global @xpack-dev-tools/openocd@latest --verbose
or uninstall
xpm uninstall --global @xpack-dev-tools/openocd --verbose
sudo npm uninstall --global xpm
arm-gnu-toolchain-12.2.rel1-x86_64-arm-none-eabi.tar.xz
First of all you should have one ST-Link V2 and make the properly connection.
| ST-Link V2 | STM32F103C8T6 |
|---|---|
| +3V3 | Vcc pad |
| GND | GND pad |
| SWDIO | PA13 |
| SWCLK | PA14 |
| TRACESWO | PB3 |
$ make
$ make flash
$ make monitor
The device works on I2C slave mode and has the following parameters
Device address: 0x23
Frequency: 400 kHz
0b 0000 0000
| set pin | | 0x03
| reset pin | | 0x reset pin
- probe
- soft reset
- config
- put
- get
- get temperature
- uptime
- reset reason
- Irms (dsp function)
- array data receive
{ "version": "0.2.0", "projectName": "i2c_to_gpio", "configurations": [ { "name": "ST-LINK V2 DEBUGGER", "type": "cortex-debug", "request": "launch", "cwd": "${workspaceRoot}", "servertype": "openocd", "executable": "${workspaceFolder}/i2c_to_gpio/build/i2c_to_gpio.elf", "configFiles": [ "interface/stlink.cfg", "target/stm32f1x.cfg" ], // "device": "STM32F103C8T6", "interface": "swd", "runToEntryPoint": "main", // "svdFile": "${workspaceFolder}/i2c_to_gpio/STM32F103.svd", // Include svd to watch device peripherals "preLaunchCommands": [ "set mem inaccessible-by-default off", "monitor reset" ], "postLaunchCommands": [ "monitor reset init", "monitor sleep 200" ] // "swoConfig": // { // "enabled": true, // "cpuFrequency": 72000000, // "swoFrequency": 4000000, // "source": "probe", // "decoders": // [ // { // "label": "ITM port 0 output", // "type": "console", // "port": 0, // "showOnStartup": true, // "encoding": "ascii" // } // ] // } } ] }