STM32F723E Discovery
Overview
The discovery kit enables a wide diversity of applications taking benefit from audio, multi-sensor support, graphics, security, security, video, and high-speed connectivity features. Important board features include:
STM32F723IEK6 microcontroller featuring 512 Kbytes of Flash memory and 256+16+4 Kbytes of RAM, in BGA176 package
On-board ST-LINK/V2-1 supporting USB re-enumeration capability
TFT LCD 240x240 pixels with touch panel
SAI audio codec
Audio line in and line out jack
Stereo speaker outputs
Four ST MEMS microphones
Two pushbuttons (user and reset)
512-Mbit Quad-SPI Flash memory
8-Mbit external PSRAM
USB OTG HS with Micro-AB connectors
USB OTG FS with Micro-AB connectors
More information about the board can be found at the 32F723E-DISCO website.
Hardware
The STM32F723E Discovery kit provides the following hardware components:
STM32F723IEK6 in BGA176 package
ARM® 32-bit Cortex® -M7 CPU with FPU
216 MHz max CPU frequency
VDD from 1.8 V to 3.6 V
1 MB Flash
256+16+4 KB SRAM including 64KB of tightly coupled memory
GPIO with external interrupt capability
3x12-bit ADC with 24 channels
2x12-bit D/A converters
RTC
Advanced-control Timer (2)
General Purpose Timers (13)
Watchdog Timers (2)
USART/UART (8)
I2C (3)
SPI (5)
2xSAI (serial audio interface)
SDIO (2)
CAN
USB 2.0 OTG FS with on-chip PHY
USB 2.0 OTG HS/FS with dedicated DMA, on-chip full-speed PHY and on-chip hi-speed PHY
CRC calculation unit
True random number generator
DMA Controller
More information about STM32F723IEK6 can be found here:
Supported Features
The Zephyr stm32f723e_disco board configuration supports the following hardware features:
Interface |
Controller |
Driver/Component |
|---|---|---|
NVIC |
on-chip |
nested vector interrupt controller |
UART |
on-chip |
serial port-polling; serial port-interrupt |
PINMUX |
on-chip |
pinmux |
GPIO |
on-chip |
gpio |
I2C |
on-chip |
i2c |
SPI |
on-chip |
spi |
USB |
on-chip |
USB device |
Other hardware features are not yet supported on Zephyr porting.
The default configuration can be found in boards/st/stm32f723e_disco/stm32f723e_disco_defconfig
Pin Mapping
STM32F723E Discovery kit has 7 GPIO controllers. These controllers are responsible for pin muxing, input/output, pull-up, etc.
For more details please refer to 32F723E-DISCO board User Manual.
Default Zephyr Peripheral Mapping:
UART_2 TX/RX : PA2/PA3 (Arduino Serial)
UART_6 TX/RX : PC6/PC7 (ST-Link Virtual Port Com)
I2C1 SCL/SDA : PB8/PB9
I2C2 SCL/SDA : PH4/PH5 (Arduino I2C)
I2C3 SCL/SDA : PA8/PH8
SPI1 SCK/MISO/MOSI : PA5/PB4/PB5 (Arduino SPI)
LD1 : PA5
LD5 : PA7
LD6 : PB1
OTG_FS_DM : PA11
OTG_FS_DP : PA12
System Clock
The STM32F723E System Clock can be driven by an internal or external oscillator, as well as by the main PLL clock. By default, the System clock is driven by the PLL clock at 216MHz, driven by a 25MHz high speed external clock.
Serial Port
The STM32F723E Discovery kit has up to 8 UARTs. The Zephyr console output is assigned to UART6 which connected to the onboard ST-LINK/V2 Virtual COM port interface. Default communication settings are 115200 8N1.
Programming and Debugging
STM32F723E Discovery kit includes an ST-LINK/V2 embedded debug tool interface.
Applications for the stm32f723e_disco board configuration can be built and
flashed in the usual way (see Building an Application and
Run an Application for more details).
Flashing
The board is configured to be flashed using west STM32CubeProgrammer runner, so its installation is required.
Alternatively, OpenOCD or JLink can also be used to flash the board using
the --runner (or -r) option:
$ west flash --runner openocd
$ west flash --runner jlink
Flashing an application to STM32F723E-DISCO
First, connect the STM32F723E Discovery kit to your host computer using the USB port to prepare it for flashing. Then build and flash your application.
Here is an example for the Hello World application.
# From the root of the zephyr repository
west build -b stm32f723e_disco samples/hello_world
west flash
Run a serial host program to connect with your board:
$ minicom -D /dev/ttyACM0
You should see the following message on the console:
Hello World! arm
Debugging
You can debug an application in the usual way. Here is an example for the Hello World application.
# From the root of the zephyr repository
west build -b stm32f723e_disco samples/hello_world
west debug