STM32MP135F-DK Discovery
Overview
The STM32MP135 Discovery kit (STM32MP135F-DK) leverages the capabilities of the 1 GHz STM32MP135 microprocessors to allow users to develop applications easily with Zephyr RTOS.
It includes an ST-LINK embedded debug tool, LEDs, push-buttons, two 10/100 Mbit/s Ethernet (RMII) connectors, one USB Type-C® connector, four USB Host Type-A connectors, and one microSD™ connector.
To expand the functionality of the STM32MP135 Discovery kit, one GPIO expansion connector is also available for third-party shields.
Additionally, the STM32MP135 Discovery kit features an LCD display with a touch panel, Wi‑Fi® and Bluetooth® Low Energy capability, and a 2-megapixel CMOS camera module.
It also provides secure boot and cryptography features.
Zephyr OS is ported to run on the Cortex®-A7 core.
STM32MP135FAF7: Arm® Cortex®-A7 32-bit processor at 1 GHz, in a TFBGA320 package
ST PMIC STPMIC1
4-Gbit DDR3L, 16 bits, 533 MHz
4.3” 480x272 pixels LCD display module with capacitive touch panel and RGB interface
UXGA 2-megapixel CMOS camera module (included) with MIPI CSI-2® / SMIA CCP2 deserializer
Wi-Fi® 802.11b/g/n
Bluetooth® Low Energy 4.1
Dual 10/100 Mbit/s Ethernet (RMII) compliant with IEEE-802.3u, one with Wake on LAN (WoL) support
USB Host 4-port hub
USB Type-C® DRP based on an STM32G0 device
4 user LEDs
4 push-buttons (2× user, tamper, and reset)
1 wake-up button
Board connectors:
Dual-lane MIPI CSI-2® camera module expansion
2x Ethernet RJ45
4x USB Type-A
USB Micro-B
USB Type-C®
microSD™ card holder
GPIO expansion
5 V / 3 A USB Type-C® power supply input (charger not provided)
VBAT for power backup
On-board current measurement
On-board STLINK-V3E debugger/programmer with USB re-enumeration capability:
mass storage
Virtual COM port
debug port
More information about the board can be found at the STM32P135 Discovery website [1].
Hardware
More information about the STM32MP135F_DK board hardware can be found here:
More information about STM32P135F microprocessor can be found here:
Supported Features
The stm32mp135f_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.
Type |
Location |
Description |
Compatible |
|---|---|---|---|
Clock control |
on-chip |
STM32 RCC (Reset and Clock controller)1 |
|
on-chip |
Generic fixed-rate clock provider2 |
||
on-chip |
STM32MP13 CPU Clock Describes the STM32MP13 CPU armv7 timer multiplexer1 |
||
on-chip |
PLL node binding for STM32MP13 devices1 |
||
GPIO & Headers |
on-chip |
STM32 GPIO Controller9 |
|
Input |
on-board |
Group of GPIO-bound input keys1 |
|
Interrupt controller |
on-chip |
STM32G0 External Interrupt Controller1 |
|
on-chip |
ARM Generic Interrupt Controller v21 |
||
LED |
on-board |
Group of GPIO-controlled LEDs1 |
|
Pin control |
on-chip |
STM32 Pin controller1 |
|
Reset controller |
on-chip |
STM32 Reset and Clock Control (RCC) Controller1 |
|
Serial controller |
on-chip |
STM32 UART1 |
|
SRAM |
on-chip |
Generic on-chip SRAM3 |
|
Timer |
on-chip |
per-core ARM architected timer1 |
Connections and IOs
STM32MP135F-DK Discovery Board schematic is available here: STM32MP135F Discovery board schematics [2].
Default Zephyr Peripheral Mapping:
USART_4 TX/RX : PD6/PD8 (UART console)
USER_BUTTON : PA13
LED_3 : PA14
LED_4 : PA13
System Clock
The Cortex®-A7 core is configured to run at a clock speed of up to 1GHz.
Memory mapping
Region |
Address |
Size |
|---|---|---|
SYSRAM |
0x2FFE0000-0x2FFFFFFF |
128KB |
SRAM 1 |
0x30000000-0x30003FFF |
16KB |
SRAM 2 |
0x30004000-0x30005FFF |
8KB |
SRAM 3 |
0x30006000-0x30007FFF |
8KB |
DDR |
0xC0000000-0xDFFFFFFF |
512 MB |
Programming and Debugging
The stm32mp135f_dk board supports the runners and associated west commands listed below.
| flash | debug | attach | debugserver | rtt | |
|---|---|---|---|---|---|
| openocd | ✅ (default) | ✅ (default) | ✅ | ✅ | ✅ |
Prerequisite
The STM32MP135 has a DDR controller that need to be initialized before loading the Zephyr example.
One method to perform this is to flash the Zephyr executable, along with the DDR initialization script, on an SD card inserted in the board. To do so, you first need to install STM32CubeProgrammer and download the STM32CubeMP13 package [6].
Signature and flashing
After building the Zephyr project, you need to sign your binary file using the Stm32ImageAddHeader.py with the following command:
python3 ${Path_to_STM32CubeMP13}/Utilities/ImageHeader/Python3/Stm32ImageAddHeader.py ${Path_to_build_dir}/zephyr/zephyr.bin ${STM32CubeMP13}/Projects/STM32MP135C-DK/External_Loader/Prebuild_Binaries/SD_Ext_Loader/zephyr_Signed.bin -bt 10 -la C0000000 -ep C0000000
Here -bt specifies the boot type, -la specifies the load address and -ep the entry point for your executable (same as the load address in this case).
Then, copy boards/st/stm32mp135f_dk/support/Zephyr.tsv to ${Path_to_STM32CubeMP13}/Projects/STM32MP135C-DK/External_Loader/Prebuild_Binaries/SD_Ext_Loader/.
Finally using the Cube Programmer select the Zephyr.tsv and flash the SD card with the following command:
${Path_to_STM32cube_Programmer}/bin/STM32_Programmer.sh -c port=${ConnectedPort} p=even br=115200 -d ${Path_to_STM32CubeMP13}/Projects/STM32MP135C-DK/External_Loader/Prebuild_Binaries/SD_Ext_Loader/Zephyr.tsv
Note
You can refer to this example to flash an example to the SD card: How to install STM32Cube software package on microSD card [5]
Debugging
You can debug an application using OpenOCD and GDB.
Build the sample:
# From the root of the zephyr repository west build -b stm32mp135f_dk samples/hello_world
Flash the SD card using: How to install STM32Cube software package on microSD card [5]
Run the application from the SD card
Attach to the target:
west attach
Note
The run command of GDB isn’t supported at the moment for this board.