STM32H7S78-DK Discovery
Overview
The STM32H7S78-DK Discovery kit is designed as a complete demonstration and development platform for STMicroelectronics Arm® Cortex®-M7 core-based STM32H7S7L8H6H microcontroller with TrustZone®. Here are some highlights of the STM32H7S78-DK Discovery board:
STM32H7S7L8H6H microcontroller featuring 64Kbytes of Flash memory and 620 Kbytes of SRAM in 225-pin TFBGA package
USB Type-C™ Host and device with USB power-delivery controller
SAI Audio DAC stereo with one audio jacks for input/output,
ST MEMS digital microphone with PDM interface
Octo-SPI interface connected to 512Mbit Octo-SPI NORFlash memory device (MX66UW1G45GXD100 from MACRONIX)
10/100-Mbit Ethernet,
Board connectors
STMod+ expansion connector with fan-out expansion board for Wi‑Fi®, Grove and mikroBUS™ compatible connectors
Pmod™ expansion connector
Audio MEMS daughterboard expansion connector
ARDUINO® Uno V3 expansion connector
Flexible power-supply options
ST-LINK
USB VBUS
external sources
On-board STLINK-V3E debugger/programmer with USB re-enumeration capability:
mass storage
Virtual COM port
debug port
4 user LEDs
User and reset push-buttons
More information about the board can be found at the STM32H7S78-DK Discovery website.
Hardware
The STM32H7S7xx devices are a high-performance microcontrollers family (STM32H7 Series) based on the high-performance Arm® Cortex®-M7 32-bit RISC core. They operate at a frequency of up to 500 MHz.
Core: ARM® 32-bit Cortex® -M7 CPU with TrustZone® and FPU.
Performance benchmark:
1284 DMPIS/MHz (Dhrystone 2.1)
Security
Arm® TrustZone® with ARMv8-M mainline security extension
Up to 8 configurable SAU regions
TrustZone® aware and securable peripherals
Flexible lifecycle scheme with secure debug authentication
Preconfigured immutable root of trust (ST-iROT)
SFI (secure firmware installation)
Secure data storage with hardware unique key (HUK)
Secure firmware upgrade support with TF-M
2x AES coprocessors including one with DPA resistance
Public key accelerator, DPA resistant
On-the-fly decryption of Octo-SPI external memories
HASH hardware accelerator
True random number generator, NIST SP800-90B compliant
96-bit unique ID
Active tampers
True Random Number Generator (RNG) NIST SP800-90B compliant
Clock management:
24 MHz crystal oscillator (HSE)
32768 Hz crystal oscillator for RTC (LSE)
Internal 64 MHz (HSI) trimmable by software
Internal low-power 32 kHz RC (LSI)( ±5%)
Internal 4 MHz oscillator (CSI), trimmable by software
Internal 48 MHz (HSI48) with recovery system
3 PLLs for system clock, USB, audio, ADC
Power management
Embedded regulator (LDO) with three configurable range output to supply the digital circuitry
Embedded SMPS step-down converter
RTC with HW calendar, alarms and calibration
Up to 152 fast I/Os, most 5 V-tolerant, up to 10 I/Os with independent supply down to 1.08 V
Up to 16 timers and 2 watchdogs
16x 16-bit
4x 32-bit timers with up to 4 IC/OC/PWM or pulse counter and quadrature (incremental) encoder input
5x 16-bit low-power 16-bit timers (available in Stop mode)
2x watchdogs
1x SysTick timer
Memories
Up to 64KB Flash, 2 banks read-while-write
1 Kbyte OTP (one-time programmable)
640 KB of SRAM including 64 KB with hardware parity check and 320 Kbytes with flexible ECC
4 Kbytes of backup SRAM available in the lowest power modes
Flexible external memory controller with up to 16-bit data bus: SRAM, PSRAM, FRAM, SDRAM/LPSDR SDRAM, NOR/NAND memories
2x OCTOSPI memory interface with on-the-fly decryption and support for serial PSRAM/NAND/NOR, Hyper RAM/Flash frame formats
1x HEXASPI memory interface with on-the-fly decryption and support for serial PSRAM/NAND/NOR, Hyper RAM/Flash frame formats
2x SD/SDIO/MMC interfaces
Rich analog peripherals (independent supply)
2x 12-bit ADC with up to 5 MSPS in 12-bit
1x Digital temperature sensor
35x communication interfaces
1x USB Type-C / USB power-delivery controller
1x USB OTG full-speed with PHY
1x USB OTG high-speed with PHY
3x I2C FM+ interfaces (SMBus/PMBus)
1x I3C interface
7x U(S)ARTS (ISO7816 interface, LIN, IrDA, modem control)
2x LP UART
6x SPIs including 3 muxed with full-duplex I2S
2x SAI
2x FDCAN
2x SD/SDIO/MMC interface
2x 16 channel DMA controllers
1x 8- to 16- bit camera interface
1x HDMI-CEC
1x Ethernel MAC interface with DMA controller
1x 16-bit parallel slave synchronous-interface
1x SPDIF-IN interface
1x MDIO slave interface
CORDIC for trigonometric functions acceleration
FMAC (filter mathematical accelerator)
CRC calculation unit
Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™
More information about STM32H7S7 can be found here:
Supported Features
The Zephyr STM32H7S78_DK board configuration supports the following hardware features:
Interface |
Controller |
Driver/Component |
|---|---|---|
CLOCK |
on-chip |
reset and clock control |
GPIO |
on-chip |
gpio |
NVIC |
on-chip |
nested vector interrupt controller |
PINMUX |
on-chip |
pinmux |
RNG |
on-chip |
True Random number generator |
UART |
on-chip |
serial port-polling; serial port-interrupt |
WATCHDOG |
on-chip |
independent watchdog |
ADC |
on-chip |
ADC Controller |
SPI |
on-chip |
spi bus |
Other hardware features are not yet supported on this Zephyr port.
The default configuration can be found in the defconfig and dts files:
Zephyr board options
The STM32HS7 is a SoC with Cortex-M7 architecture. Zephyr provides support for building for Secure firmware.
The BOARD options are summarized below:
BOARD |
Description |
|---|---|
stm32h7s78_dk |
For building Secure firmware |
Connections and IOs
STM32H7S78-DK Discovery Board has 12 GPIO controllers. These controllers are responsible for pin muxing, input/output, pull-up, etc.
For more details please refer to STM32H7S78-DK Discovery board User Manual.
Default Zephyr Peripheral Mapping:
USART_4 TX/RX : PD1/PD0 (VCP)
USART_7 TX/RX : PE8/PE7 (Arduino USART7)
USER_PB : PC13
LD1 (green) : PO1
LD2 (orange) : PO5
LD3 (red) : PM2
LD4 (blue) : PM3
ADC1 channel 6 input : PF12
System Clock
STM32H7S78-DK System Clock could be driven by internal or external oscillator, as well as main PLL clock. By default System clock is driven by PLL clock at 500MHz, driven by 24MHz external oscillator (HSE).
Serial Port
STM32H7S78-DK Discovery board has 2 U(S)ARTs. The Zephyr console output is assigned to USART4. Default settings are 115200 8N1.
Programming and Debugging
STM32H7S78-DK Discovery board includes an ST-LINK/V3E embedded debug tool interface.
Applications for the stm32h7s78_dk 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.
Flashing an application to STM32H7S78-DK Discovery
Connect the STM32H7S78-DK Discovery to your host computer using the USB port. Then build and flash an application. Here is an example for the Hello World application.
Run a serial host program to connect with your Nucleo board:
$ minicom -D /dev/ttyACM0
Then build and flash the application.
# From the root of the zephyr repository
west build -b stm32h7s78_dk samples/hello_world
west flash
You should see the following message on the console:
Hello World! stm32h7s78_dk
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 stm32h7s78_dk samples/hello_world
west debug