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. 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 FPU.
Performance benchmark:
1284 DMPIS/MHz (Dhrystone 2.1)
Security
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
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 stm32h7s78_dk board supports the hardware features listed below.
- on-chip / on-board
- Feature integrated in the SoC / present on the board.
- 2 / 2
-
Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files. -
vnd,foo -
Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.
stm32h7s78_dk/stm32h7s7xx target
Type |
Location |
Description |
Compatible |
|---|---|---|---|
CPU |
on-chip |
ARM Cortex-M7 CPU1 |
|
ADC |
on-chip |
STM32 ADC2 |
|
CAN |
on-chip |
STM32 FDCAN CAN FD controller2 |
|
Clock control |
on-chip |
STM32H7RS RCC (Reset and Clock controller)1 |
|
on-chip |
STM32 HSE Clock1 |
||
on-chip |
STM32 HSI Clock1 |
||
on-chip |
|||
on-chip |
STM32 LSE Clock1 |
||
on-chip |
|||
on-chip |
STM32 Clock multiplexer1 |
||
on-chip |
STM32 Microcontroller Clock Output (MCO)2 |
||
Counter |
on-chip |
STM32 counters14 |
|
Display |
on-chip |
STM32 LCD-TFT display controller1 |
|
DMA |
on-chip |
STM32U5 DMA controller1 |
|
Ethernet |
on-chip |
STM32 Ethernet Controller1 |
|
on-chip |
STM32H7 Ethernet1 |
||
Flash controller |
on-chip |
STM32 Family flash controller1 |
|
on-board |
STM32 XSPI Flash controller supporting the JEDEC CFI interface1 |
||
GPIO & Headers |
on-chip |
STM32 GPIO Controller12 |
|
on-board |
GPIO pins exposed on Arduino Uno (R3) headers1 |
||
I2C |
on-chip |
||
I2S |
on-chip |
STM32H7 I2S controller1 |
|
on-chip |
STM32 SAI controller2 |
||
Input |
on-board |
GT9xx / GT9xxx capacitive touch panels1 |
|
on-board |
Group of GPIO-bound input keys1 |
||
Interrupt controller |
on-chip |
ARMv7-M NVIC (Nested Vectored Interrupt Controller)1 |
|
on-chip |
STM32H7RS External Interrupt Controller1 |
||
LED |
on-board |
Group of GPIO-controlled LEDs1 |
|
MDIO |
on-chip |
STM32 MDIO Controller1 |
|
Memory controller |
on-board |
STM32 XSPI PSRAM1 |
|
MMU / MPU |
on-chip |
ARMv7-M Memory Protection Unit (MPU)1 |
|
MTD |
on-chip |
STM32 flash memory1 |
|
on-board |
Flash node1 |
||
on-board |
Fixed partitions of a flash (or other non-volatile storage) memory1 |
||
PHY |
on-chip |
This binding is to be used by all the usb transceivers which are built-in with USB IP1 |
|
Pin control |
on-chip |
STM32 Pin controller1 |
|
Power management |
on-chip |
STM32H7R/S power controller1 |
|
PWM |
on-chip |
||
Reset controller |
on-chip |
STM32 Reset and Clock Control (RCC) Controller1 |
|
RNG |
on-chip |
STM32 Random Number Generator1 |
|
Sensors |
on-chip |
STM32 family TEMP node for production calibrated sensors with two calibration temperatures1 |
|
on-chip |
STM32 VBAT1 |
||
on-chip |
STM32 VREF+1 |
||
Serial controller |
on-chip |
STM32 USART3 |
|
on-chip |
|||
on-chip |
STM32 LPUART1 |
||
SPI |
on-chip |
||
Timer |
on-chip |
ARMv7-M System Tick1 |
|
on-chip |
|||
on-chip |
STM32 low-power timer (LPTIM)1 |
||
USB |
on-chip |
STM32 OTGFS controller1 |
|
Watchdog |
on-chip |
STM32 watchdog1 |
|
on-chip |
STM32 system window watchdog1 |
||
xSPI |
on-chip |
STM32 XSPI Controller2 |
stm32h7s78_dk/stm32h7s7xx/ext_flash_app target
Type |
Location |
Description |
Compatible |
|---|---|---|---|
CPU |
on-chip |
ARM Cortex-M7 CPU1 |
|
ADC |
on-chip |
STM32 ADC2 |
|
CAN |
on-chip |
STM32 FDCAN CAN FD controller2 |
|
Clock control |
on-chip |
STM32H7RS RCC (Reset and Clock controller)1 |
|
on-chip |
STM32 HSE Clock1 |
||
on-chip |
STM32 HSI Clock1 |
||
on-chip |
|||
on-chip |
STM32 LSE Clock1 |
||
on-chip |
|||
on-chip |
STM32 Clock multiplexer1 |
||
on-chip |
STM32 Microcontroller Clock Output (MCO)2 |
||
Counter |
on-chip |
STM32 counters14 |
|
Display |
on-chip |
STM32 LCD-TFT display controller1 |
|
DMA |
on-chip |
STM32U5 DMA controller1 |
|
Ethernet |
on-chip |
STM32 Ethernet Controller1 |
|
on-chip |
STM32H7 Ethernet1 |
||
Flash controller |
on-chip |
STM32 Family flash controller1 |
|
on-board |
STM32 XSPI Flash controller supporting the JEDEC CFI interface1 |
||
GPIO & Headers |
on-chip |
STM32 GPIO Controller12 |
|
on-board |
GPIO pins exposed on Arduino Uno (R3) headers1 |
||
I2C |
on-chip |
||
I2S |
on-chip |
STM32H7 I2S controller1 |
|
on-chip |
STM32 SAI controller2 |
||
Input |
on-board |
GT9xx / GT9xxx capacitive touch panels1 |
|
on-board |
Group of GPIO-bound input keys1 |
||
Interrupt controller |
on-chip |
ARMv7-M NVIC (Nested Vectored Interrupt Controller)1 |
|
on-chip |
STM32H7RS External Interrupt Controller1 |
||
LED |
on-board |
Group of GPIO-controlled LEDs1 |
|
MDIO |
on-chip |
STM32 MDIO Controller1 |
|
Memory controller |
on-board |
STM32 XSPI PSRAM1 |
|
MMU / MPU |
on-chip |
ARMv7-M Memory Protection Unit (MPU)1 |
|
MTD |
on-chip |
STM32 flash memory1 |
|
on-board |
Fixed partitions of a flash (or other non-volatile storage) memory2 |
||
on-board |
Flash node1 |
||
PHY |
on-chip |
This binding is to be used by all the usb transceivers which are built-in with USB IP1 |
|
Pin control |
on-chip |
STM32 Pin controller1 |
|
Power management |
on-chip |
STM32H7R/S power controller1 |
|
PWM |
on-chip |
||
Reset controller |
on-chip |
STM32 Reset and Clock Control (RCC) Controller1 |
|
RNG |
on-chip |
STM32 Random Number Generator1 |
|
Sensors |
on-chip |
STM32 family TEMP node for production calibrated sensors with two calibration temperatures1 |
|
on-chip |
STM32 VBAT1 |
||
on-chip |
STM32 VREF+1 |
||
Serial controller |
on-chip |
STM32 USART3 |
|
on-chip |
|||
on-chip |
STM32 LPUART1 |
||
SPI |
on-chip |
||
Timer |
on-chip |
ARMv7-M System Tick1 |
|
on-chip |
|||
on-chip |
STM32 low-power timer (LPTIM)1 |
||
USB |
on-chip |
STM32 OTGFS controller1 |
|
Watchdog |
on-chip |
STM32 watchdog1 |
|
on-chip |
STM32 system window watchdog1 |
||
xSPI |
on-chip |
STM32 XSPI Controller2 |
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
USB OTG FS DM/DP : PM12/PM11
XSPI1 NCS/DQS0/DQS1/CLK/IO: PO0/PO2/PO3/PO4/PP0..15
I2C1 SCL/SDA: PB6/PB9
FDCAN1 RX/TX : PB8/PB9
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.
USB
STM32H7S78-DK Discovery board has 2 USB Type-C connectors. Currently, only USB port2 (FS) is supported.
FDCAN
STM32H7S78-DK Discovery board has 2 FDCAN bus interfaces.
FDCAN1 is configured but not enabled by default. To enable it, make sure
that i2c1 is disabled, since they share the PB9 pin.
Programming and Debugging
The stm32h7s78_dk board supports the runners and associated west commands listed below.
| flash | debug | attach | rtt | debugserver | |
|---|---|---|---|---|---|
| jlink | ✅ | ✅ | ✅ | ✅ | ✅ |
| openocd | ✅ | ✅ | ✅ | ✅ | ✅ |
| pyocd | ✅ | ✅ | ✅ | ✅ | ✅ |
| stlink_gdbserver | ✅ (default) | ✅ | ✅ | ||
| stm32cubeprogrammer | ✅ (default) |
STM32H7S78-DK Discovery board includes an ST-LINK/V3E embedded debug tool interface.
The board is configured to be flashed using west STM32CubeProgrammer runner, so its installation is required.
Application in SoC Flash
Here is an example for the Hello World application.
Connect the STM32H7S78-DK Discovery to your host computer using the USB port, then 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
If the application size is too big to fit in SoC Flash, Zephyr Code and Data Relocation can be used to relocate the non-critical and big parts of the application to external Flash.
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
Application in External Flash
Because of the limited amount of SoC Flash (64KB), you may want to store the application
in external QSPI Flash instead, and run it from there. In that case, the MCUboot bootloader
is needed to chainload the application. A dedicated board variant, ext_flash_app, was created
for this usecase.
Sysbuild (System build) makes it possible to build and flash all necessary images needed to run a user application from external Flash.
The following example shows how to build Hello World with Sysbuild enabled:
# From the root of the zephyr repository
west build -b stm32h7s78_dk/stm32h7s7xx/ext_flash_app --sysbuild samples/hello_world
By default, Sysbuild creates MCUboot and user application images.
For more information, refer to the Sysbuild (System build) documentation.
Flashing
Both MCUboot and user application images can be flashed by running:
west flash
You should see the following message in the serial host program:
*** Booting MCUboot v2.2.0-192-g96576b341ee1 ***
*** Using Zephyr OS build v4.3.0-rc2-37-g6cc7bdb58a92 ***
I: Starting bootloader
I: Bootloader chainload address offset: 0x0
I: Image version: v0.0.0
I: Jumping to the first image slot
*** Booting Zephyr OS build v4.3.0-rc2-37-g6cc7bdb58a92 ***
Hello World! stm32h7s78_dk/stm32h7s7xx/ext_flash_app
To only flash the user application in the subsequent builds, Use:
west flash --domain hello_world
With the default configuration, the board uses MCUboot’s Swap-using-offset mode. To get more information about the different MCUboot operating modes and how to perform application upgrade, refer to MCUboot design. To learn more about how to secure the application images stored in external Flash, refer to MCUboot Encryption.
Debugging
You can debug the application in external flash using west and GDB.
After flashing MCUboot and the app, execute the following command:
west debugserver
Then, open another terminal (don’t forget to activate Zephyr’s environment) and execute:
west attach
By default, user application symbols are loaded. To debug MCUboot application, launch:
west attach --domain mcuboot