Nucleo-H743ZI ADC + Ethernet Recipe

This project is a minimum working example to establish an Ethernet connection via LwIP (w/o RTOS) between the STM32H743 and a Python client for ADC sample data transmission.

• µC uses static IP address 192.168.0.10 (server)
• PC ethernet interface uses static IP address 192.168.0.11 (client)

Build environments

1. Ubuntu - CubeMX & gcc-arm-none-eabi & st-link
2. Windows - CubeMX & IAR Embedded Workbench

1. Ubuntu

1. set IP / network mask:
   1. type ifconfig and locate Ethernet device name (e.g. ens3)
   2. edit $ nano /etc/netplan/01-netcfg.yaml

      network:
      version: 2
      renderer: networkd
      ethernets:
          ens3:
          dhcp4: no
          addresses:
              - 192.168.0.11/24
          gateway4: 192.168.0.11
          nameservers:
              addresses: [8.8.8.8, 1.1.1.1]
      

   3. activate new IP settings via $ sudo netplan apply and validate with $ ifconfig
2. download and install CubeMX from ST development tools site
3. install gcc-arm-none-eabi
   • $ add-apt-repository ppa:team-gcc-arm-embedded/ppa
   • $ apt-get update
   • $ apt-get install gcc-arm-none-eabi
4. download and install st-link from GitHub repository for STLINK/V3 support
   • $ git clone
   • $ make clean && release && make install && make debug && make package (see compile manual)
   • $ dpkg -i ./build/Release/dist/stlink_1.7.0-186-gc4762e6-1_amd64.deb
   • $ apt install ./build/Release/dist/stlink_1.7.0-186-gc4762e6-1_amd64.deb
   • $ st-info --probe prints detected stlink devices if installed successfully
5. generate code, compile binary and flash µC
   1. open project file H743ZI_LwIP_ADC+ETH.ioc in CubeMX and click GENERATE CODE
   2. cd into project directory (./stm32h7_adc_eth) and compile via $ make all
   3. $ st-flash --reset write ./build/H743ZI_LwIP_ADC+ETH.bin 0x8000000 to flash the µC
6. print ADC data (noise) from µC sent via Ethernet

   $ python py_udp_receiver/udp_receiver.py
   

Result

2. Windows

1. set IP / network mask for the PC as 192.168.0.11 / 255.255.255.0 (client)
2. connect Nucleo-H743ZI board to your PC using Ethernet cable
3. power up the Nucleo-H743ZI board (connect to USB port or use external 5V/3.3V)
4. open the project (./EWARM/Project.eww)
5. flash the binary file to the µC
6. open console, cd to the project directory stm32h7_adc_eth and type:

   python py_udp_receiver/udp_receiver.py
   

Result

Once the build and flash succeeded and UDP connection is established, the ADC sample words are displayed in the console.

If the build fails...

• validate RAM address range wich is supposed to be from 0x24000000 to 0x2401FFFF (see below)