MiniSTM32H750 Core Board
Overview
The MiniSTM32H750 Core board is a compact development board equipped with an STM32H750VBT6 microcontroller. It features a variety of peripherals, including a user LED and button, and external SPI and QuadSPI NOR flash memory.
Key Features
STM32 microcontroller in LQFP100 package
USB OTG or full-speed device
1 user LED
User, boot, and reset push-buttons
32.768 kHz and 25MHz HSE crystal oscillators
External NOR Flash memories: 64-Mbit Quad-SPI and 64-Mbit SPI
Board connectors
Camera (8 bit) connector
ST7735 TFT-LCD 160 x 80 pixels (RGB565 3-SPI)
microSD card
USB Type-C Connector
SWD header for external debugger
2x 40-pin GPIO connector
More information about the board can be found on the Mini_STM32H7xx website.
Hardware
The MiniSTM32H750 Core board provides the following hardware components:
STM32H750VBT6 in LQFP100 package
Arm® 32-bit Cortex®-M7 CPU with FPU
Chrom-ART Accelerator
Hardware JPEG Codec
480 MHz max CPU frequency
VDD from 1.62 V to 3.6 V
128 KB Flash
~1 MB SRAM
High-resolution timer (2.1 ns)
32-bit timers(2)
16-bit timers(10)
SPI(6)
I2C(4)
I2S (3)
USART(4)
UART(4)
USB OTG Full Speed and High Speed(1)
USB OTG Full Speed(1)
CAN FD(2)
SAI(4)
SPDIF_Rx(4)
HDMI_CEC(1)
Dual Mode Quad SPI(1)
Camera Interface
GPIO (up to 82) with external interrupt capability
16-bit ADC(3) with 16 channels
12-bit DAC with 2 channels(2)
True Random Number Generator (RNG)
16-channel DMA
LCD-TFT Controller with XGA resolution
More information about STM32H750 can be found here:
Supported Features
The mini_stm32h750 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.
mini_stm32h750/stm32h750xx target
On-target memory for this board target: 512 KiB of RAM, 128 KiB of Flash.
Type |
Location |
Description |
Compatible |
|---|---|---|---|
CPU |
on-chip |
ARM Cortex-M7 CPU1 |
|
ADC |
on-chip |
STM32 ADC2 |
|
Audio |
on-chip |
STMicroelectronics DFSDM block1 |
|
on-chip |
STMicroelectronics DFSDM DMIC4 |
||
CAN |
on-chip |
STM32H7 series (and compatible) FDCAN CAN FD controller2 |
|
Clock control |
on-chip |
STM32H7 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 |
||
Comparator |
on-chip |
STM32H7 series Comparator2 |
|
Counter |
on-chip |
STM32 counters14 |
|
CRC |
on-chip |
STM32 CRC calculation unit1 |
|
Cryptographic accelerator |
on-chip |
STM32 Cryptographic Accelerator1 |
|
on-chip |
STM32 HASH Processor1 |
||
DAC |
on-chip |
STM32 family DAC1 |
|
Display |
on-chip |
STM32 Chrom-ART Accelerator (DMA2D)1 |
|
on-chip |
STM32 LCD-TFT display controller1 |
||
DMA |
on-chip |
STM32 DMA controller (V1)2 |
|
on-chip |
STM32 BDMA controller1 |
||
on-chip |
STM32 DMAMUX controller2 |
||
Ethernet |
on-chip |
ST STM32 Ethernet MAC1 |
|
on-chip |
Synopsys DesignWare MAC MDIO controller1 |
||
on-chip |
Synopsys DesignWare MAC PTP (Precision Time Protocol) Clock1 |
||
Flash controller |
on-chip |
STM32 Family flash controller1 |
|
on-board |
STM32 QSPI Flash controller supporting the JEDEC CFI interface1 |
||
GPIO & Headers |
on-chip |
STM32 GPIO Controller11 |
|
on-board |
GPIO pins exposed on the DCMI camera connector used for interfacing with the OV2640, OV7670, and OV5640 camera sensors1 |
||
I2C |
on-chip |
STM32 I2C V2 controller4 |
|
I2S |
on-chip |
STM32H7 I2S controller3 |
|
on-chip |
STM32 SAI Block controller2 |
||
Input |
on-board |
Group of GPIO-bound input keys1 |
|
Interrupt controller |
on-chip |
ARMv7-M NVIC (Nested Vectored Interrupt Controller)1 |
|
on-chip |
STM32 External Interrupt Controller1 |
||
LED |
on-board |
Group of GPIO-controlled LEDs1 |
|
Memory controller |
on-chip |
STM32 Battery Backed RAM1 |
|
on-chip |
STM32H7 Flexible Memory Controller (FMC)1 |
||
on-chip |
STM32 Flexible Memory Controller (SDRAM controller)1 |
||
MMU / MPU |
on-chip |
ARMv7-M Memory Protection Unit (MPU)1 |
|
MTD |
on-chip |
STM32 flash memory1 |
|
on-board |
Properties supporting Zephyr spi-nor flash driver (over the Zephyr SPI API) control of serial flash memories using the standard M25P80-based command set1 |
||
on-board |
Flash node1 |
||
on-board |
Fixed partitions of a flash (or other non-volatile storage) memory1 |
||
NVMEM |
on-chip |
Fixed layout for Non-Volatile memory1 |
|
OTP memory |
on-chip |
STM32 embedded NVM OTP1 |
|
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 |
STM32H7 power controller1 |
|
PWM |
on-chip |
STM32 PWM12 |
|
QSPI |
on-chip |
STM32 QSPI Controller1 |
|
Regulator |
on-chip |
STM32 VREFBUF regulator1 |
|
Reset controller |
on-chip |
STM32 Reset and Clock Control (RCC) Controller1 |
|
RNG |
on-chip |
STM32 Random Number Generator1 |
|
RTC |
on-chip |
STM32 RTC1 |
|
SDHC |
on-chip |
||
Sensors |
on-chip |
STM32 quadrature decoder6 |
|
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 |
||
on-chip |
STM32 UART4 |
||
on-chip |
STM32 LPUART1 |
||
SMbus |
on-chip |
STM32 SMBus controller4 |
|
SPI |
on-chip |
||
Timer |
on-chip |
ARMv7-M System Tick1 |
|
on-chip |
STM32 timers14 |
||
on-chip |
STM32 low-power timer (LPTIM)1 |
||
USB |
on-chip |
STM32 OTGFS controller1 |
|
Video |
on-chip |
STM32 DCMI1 |
|
on-chip |
STM32 JPEG HW Codec1 |
||
Watchdog |
on-chip |
STM32 watchdog1 |
|
on-chip |
STM32 system window watchdog1 |
mini_stm32h750/stm32h750xx/ext_flash_app target
On-target memory for this board target: 512 KiB of RAM, 8 MiB of Flash.
Type |
Location |
Description |
Compatible |
|---|---|---|---|
CPU |
on-chip |
ARM Cortex-M7 CPU1 |
|
ADC |
on-chip |
STM32 ADC2 |
|
Audio |
on-chip |
STMicroelectronics DFSDM block1 |
|
on-chip |
STMicroelectronics DFSDM DMIC4 |
||
CAN |
on-chip |
STM32H7 series (and compatible) FDCAN CAN FD controller2 |
|
Clock control |
on-chip |
STM32H7 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 |
||
Comparator |
on-chip |
STM32H7 series Comparator2 |
|
Counter |
on-chip |
STM32 counters14 |
|
CRC |
on-chip |
STM32 CRC calculation unit1 |
|
Cryptographic accelerator |
on-chip |
STM32 Cryptographic Accelerator1 |
|
on-chip |
STM32 HASH Processor1 |
||
DAC |
on-chip |
STM32 family DAC1 |
|
Display |
on-chip |
STM32 Chrom-ART Accelerator (DMA2D)1 |
|
on-chip |
STM32 LCD-TFT display controller1 |
||
DMA |
on-chip |
STM32 DMA controller (V1)2 |
|
on-chip |
STM32 BDMA controller1 |
||
on-chip |
STM32 DMAMUX controller2 |
||
Ethernet |
on-chip |
ST STM32 Ethernet MAC1 |
|
on-chip |
Synopsys DesignWare MAC MDIO controller1 |
||
on-chip |
Synopsys DesignWare MAC PTP (Precision Time Protocol) Clock1 |
||
Flash controller |
on-chip |
STM32 Family flash controller1 |
|
on-board |
STM32 QSPI Flash controller supporting the JEDEC CFI interface1 |
||
GPIO & Headers |
on-chip |
STM32 GPIO Controller11 |
|
on-board |
GPIO pins exposed on the DCMI camera connector used for interfacing with the OV2640, OV7670, and OV5640 camera sensors1 |
||
I2C |
on-chip |
STM32 I2C V2 controller4 |
|
I2S |
on-chip |
STM32H7 I2S controller3 |
|
on-chip |
STM32 SAI Block controller2 |
||
Input |
on-board |
Group of GPIO-bound input keys1 |
|
Interrupt controller |
on-chip |
ARMv7-M NVIC (Nested Vectored Interrupt Controller)1 |
|
on-chip |
STM32 External Interrupt Controller1 |
||
LED |
on-board |
Group of GPIO-controlled LEDs1 |
|
Memory controller |
on-chip |
STM32 Battery Backed RAM1 |
|
on-chip |
STM32H7 Flexible Memory Controller (FMC)1 |
||
on-chip |
STM32 Flexible Memory Controller (SDRAM controller)1 |
||
MMU / MPU |
on-chip |
ARMv7-M Memory Protection Unit (MPU)1 |
|
MTD |
on-chip |
STM32 flash memory1 |
|
on-board |
Properties supporting Zephyr spi-nor flash driver (over the Zephyr SPI API) control of serial flash memories using the standard M25P80-based command set1 |
||
on-board |
Fixed partitions of a flash (or other non-volatile storage) memory1 |
||
on-board |
Flash node1 |
||
NVMEM |
on-chip |
Fixed layout for Non-Volatile memory1 |
|
OTP memory |
on-chip |
STM32 embedded NVM OTP1 |
|
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 |
STM32H7 power controller1 |
|
PWM |
on-chip |
STM32 PWM12 |
|
QSPI |
on-chip |
STM32 QSPI Controller1 |
|
Regulator |
on-chip |
STM32 VREFBUF regulator1 |
|
Reset controller |
on-chip |
STM32 Reset and Clock Control (RCC) Controller1 |
|
RNG |
on-chip |
STM32 Random Number Generator1 |
|
RTC |
on-chip |
STM32 RTC1 |
|
SDHC |
on-chip |
||
Sensors |
on-chip |
STM32 quadrature decoder6 |
|
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 |
||
on-chip |
STM32 UART4 |
||
on-chip |
STM32 LPUART1 |
||
SMbus |
on-chip |
STM32 SMBus controller4 |
|
SPI |
on-chip |
||
Timer |
on-chip |
ARMv7-M System Tick1 |
|
on-chip |
STM32 timers14 |
||
on-chip |
STM32 low-power timer (LPTIM)1 |
||
USB |
on-chip |
STM32 OTGFS controller1 |
|
Video |
on-chip |
STM32 DCMI1 |
|
on-chip |
STM32 JPEG HW Codec1 |
||
Watchdog |
on-chip |
STM32 watchdog1 |
|
on-chip |
STM32 system window watchdog1 |
Pin Mapping
MiniSTM32H750 Core board has 5 GPIO controllers. These controllers are responsible for pin muxing, input/output, pull-up, etc.
For more details please refer to Mini_STM32H7xx website.
Default Zephyr Peripheral Mapping:
The MiniSTM32H750 Core board is configured as follows
USART1 TX/RX : PB14/PB15 (Console)
USER_LED : PE3
USER_PB : PC13
SPI1 SCK/MISO/MOSI/NSS : PB3/PB4/PD7/PD6 (NOR Flash memory)
QuadSPI CLK/NCS/IO0/IO1/IO2/IO3 : PB2/PB6/PD11/PD12/PE2/PD13 (NOR Flash memory)
SDMMC1 CLK/DCMD/CD/D0/D1/D2/D3 : PC12/PD2/PD4/PC8/PC9/PC10/PC11 (microSD card)
USB DM/DP : PA11/PA12
System Clock
The STM32H750VB 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 480MHz. PLL clock is fed by a 25MHz high speed external clock.
Serial Port
The Zephyr console output is assigned to USART1. Default communication settings are 115200 8N1.
Programming and Debugging
The mini_stm32h750 board supports the runners and associated west commands listed below.
| flash | debug | attach | debugserver | rtt | reset | |
|---|---|---|---|---|---|---|
| dfu-util | ✅ | |||||
| jlink | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
| openocd | ✅ | ✅ (default) | ✅ | ✅ | ✅ | |
| stlink_gdbserver | ✅ | ✅ | ✅ | |||
| stm32cubeprogrammer | ✅ (default) |
The MiniSTM32H750 Core board facilitates firmware flashing via the USB DFU bootloader. This method simplifies the process of updating images, although it doesn’t provide debugging capabilities. However, the board provides header pins for the Serial Wire Debug (SWD) interface, which can be used to connect an external debugger, such as ST-Link.
When flashing to the external QSPI Flash using STM32CubeProgrammer or
ST-Link GDB Server (e.g. --runner stm32cubeprogrammer or
--runner stlink_gdbserver), the external flash loader
STM32H7xx_W25Q128_WeActStudio.stldr is required. Download it from
Mini_STM32H7xx QSPI Flasher and copy it into the ExternalLoader
directory of your STM32CubeProgrammer installation.
Flashing
To activate the bootloader, follow these steps:
Press and hold the BOOT0 key.
While still holding the BOOT0 key, press and release the RESET key.
Wait for 0.5 seconds, then release the BOOT0 key.
Upon successful execution of these steps, the device will transition into bootloader mode and present itself as a USB DFU Mode device. You can program the device using the west tool or the STM32CubeProgrammer.
Application in SoC Flash
Here is an example for how to build and flash the Hello World application.
First, put the board in bootloader mode as described above. Then build and flash the application in the usual way:
# From the root of the zephyr repository
west build -b mini_stm32h750 samples/hello_world
west flash
Run a serial host program to connect with your board:
$ minicom -D <tty_device> -b 115200
Then, press the RESET button, you should see the following message:
Hello World! mini_stm32h750
Replace <tty_device> with the port where the board
can be found. For example, under Linux, /dev/ttyUSB0.
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 using OpenOCD or J-Link via the SWD header.
# From the root of the zephyr repository
west build -b mini_stm32h750 samples/hello_world
west debug
Application in External Flash
Because of the limited amount of SoC Flash (128KB), 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 mini_stm32h750/stm32h750xx/ext_flash_app --sysbuild samples/hello_world
By default, Sysbuild creates MCUboot and user application images.
Build directory structure created by Sysbuild is different from traditional Zephyr build. Output is structured by the domain subdirectories:
build/
├── hello_world
| └── zephyr
│ ├── zephyr.elf
│ ├── zephyr.hex
│ ├── zephyr.bin
│ ├── zephyr.signed.bin
│ └── zephyr.signed.hex
├── mcuboot
│ └── zephyr
│ ├── zephyr.elf
│ ├── zephyr.hex
│ └── zephyr.bin
└── domains.yaml
Note
With --sysbuild option, MCUboot will be re-built every time the pristine build is used,
but only needs to be flashed once if none of the MCUboot configs are changed.
For more information about the system build please read the Sysbuild (System build) documentation.
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 v2.2.0-173-gb192716c969a ***
*** Using Zephyr OS build v4.2.0-6260-ge39ba1a35bc4 ***
I: Starting bootloader
I: Image index: 0, Swap type: none
I: Image index: 0, Swap type: none
I: Bootloader chainload address offset: 0x0
I: Image version: v0.0.0
I: Jumping to the first image slot
*** Booting Zephyr OS build v4.2.0-6260-ge39ba1a35bc4 ***
Hello World! mini_stm32h750/stm32h750xx/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
Testing the LEDs in the MiniSTM32H750
There is a sample that allows to test that LED on the board are working properly with Zephyr:
# From the root of the zephyr repository
west build -b mini_stm32h750 samples/basic/blinky
west flash
You can build and flash the examples to make sure Zephyr is running correctly on your board. The LED definitions can be found in boards/weact/mini_stm32h750/mini_stm32h750-common.dtsi.