Autonomous-Cyber-Physical-Systems / stm32f407vet6-rust-examples

Rust embedded examples for STM32F407VET6 microcontroller.

STM32F407VET6 Rust Examples

This repository contains simple examples for STM32F407VET6 micro-controllers.

Board

The board can be purchased from AliExpress for about 10$, click here

Specifications:

• STM32F407VET6 ARM Cortex M4
• 168MHz, 210 DMIPS / 1.25 DMIPS / MHz
• 1.8V - 3.6V operating voltage
• 8MHz system crystal
• 32.768KHz RTC crystal
• 2.54mm pitch pins
• JTAG/SWD header
• 512KByte Flash, 192 + 4 KByte SRAM
• 3x SPI, 3x USART, 2x UART, 2x I2S, 3x I2C
• 1x FSMC, 1x SDIO, 2x CAN
• 1x USB 2.0 FS / HS controller (with dedicated DMA)
• 1x USB HS ULPI (for external USB HS PHY)
• Micro SD
• Winbond W25Q16 16Mbit SPI Flash
• RTC battery CR1220
• 1x 10/100 Ethernet MAC
• 1x 8 to 12-bit Parallel Camera interface
• 3x ADC (12-bit / 16-channel)
• 2x DAC (12-bit)
• 12x general timers, 2x advanced timers
• AMS1117-3.3V: 3.3V LDO voltage regulator, max current 800mA
• Micro USB for power and comms
• Red power LED D1
• Red user LED D2 (PA6) active low
• Red user LED D3 (PA7) active low
• 2x jumpers for bootloader selection
• Reset button, Wakeup button, 2x user buttons K0 (PE4) and K1 (PE3)
• 2x24 side pins + 2x16 bottom pins + 1x4 ISP pins
• 2x16 FMSC LCD Interface
• NRF24L01 socket
• M3 mounting holes
• Dimensions: 85.1mm x 72.45mm

Modifications:

• change HSE_VALUE from 8000000 to 25000000
• change PLL_M from 8 to 25

The above details have been picked up from here.

Reference Manual : click here

Examples

LED

This code is to blink the D3 LED on the board.

To build the release binary :

cargo build --release --example leds

In one terminal start openocd :

openocd

In another terminal start setup gdb to run launch the application :

arm-none-eabi-gdb -x openocd.gdb target/thumbv7em-none-eabi/release/examples/leds

Button

The code prints the button status onto the console via semihosting.

To build the release binary :

cargo build --release --example buttons

In one terminal start openocd :

openocd

In another terminal start setup gdb to run launch the application :

arm-none-eabi-gdb -x openocd.gdb target/thumbv7em-none-eabi/release/examples/buttons

External interrupts via GPIO ports

This is a little more complicated and fun example. The board has 2 user buttons and 2 user LEDs. The code configures each button to trigger on being pressed, and the interrupt handler toggles a button.

To build the release binary :

cargo build --release --example leds

In one terminal start openocd :

openocd

In another terminal start setup gdb to run launch the application :

arm-none-eabi-gdb -x openocd.gdb target/thumbv7em-none-eabi/release/examples/leds

Note that the gdb configuration has been passed to gdb. But the application is not started on the board, run continue command in gdb to resume execution.

References

• GPIO interrupts : click here
• Rust embedded discovery book : click here
• Blinking an LED : click here

License

Licensed under the MIT License.