pbarada opened a new pull request, #20819:
URL: https://github.com/apache/nuttx/pull/20819
Add stm32h7s8-dk Ethernet support
## Summary
- Add jumbo-xip configuration which includes Ethernet networking.
- Add STM32_ETH_MDIO GPIO Kconfig option which enables GPIO emulation of
SMA clause-22 communication with PHY; required when JP6 is in default
poition. If GPIO emulation is not enabled, JP6 must be in alternate
position to allow SMA communication with LAN8742A PHY via ETHMAC.
## Impact
- User experience: No adaptation required. This fix extends existing
behavior.
- Build: No impact.
- Hardware: Affects stm32h7s8-dk board.
- Documentation: Update stm32h7s8 platform to add Ethernet and missing XIP
information
- Security: No impact.
- Compatibility: Backward compatible - adds functionality
## Testing
Build Host:
- OS: Ubuntu 24.04.4 LTS
- Compiler: arm-none-eabi-gcc 13.2.1
Target:
- Architecture: ARM (STM32H7S3L8)
- Board: STM32H7S8-DK
- Configuration: Default stm32h7s8:boot-xip and stm32h7s8-dk:jumbo-xip
configurations(to create both bootloader and external flash images)
Testing performed:
- Connected Ethernet to stm32h7s8-dk (with JP6 in default position)
- Burnt/booted built default boot-xip and jumbo-xip configured images
- Ran ostest to successful completion
- Ran commands/log as shown in target documentation
- Also verified Ethernet communication with CONFIG_STM32_ETH_MDIO_GPIO
disabled and JP6 in alternate position
Runtime testing:
From target console:
```
Bootloader 13.1.0 d2ce23c49e-dirty Oct 19 2026 11:35:21 arm stm32h7s8-dk
DE
telnetd [6:100]
NuttShell (NSH) NuttX-13.1.0
nsh> uname -a
NuttX 13.1.0 d2ce23c49e-dirty Oct 19 2026 11:35:23 arm stm32h7s8-dk
nsh> stm32_eth: link full-duplex 100 Mbps
ping 192.168.3.1
PING 192.168.3.1 56 bytes of data
56 bytes from 192.168.3.1: icmp_seq=0 time=0.0 ms
56 bytes from 192.168.3.1: icmp_seq=1 time=0.0 ms
56 bytes from 192.168.3.1: icmp_seq=2 time=0.0 ms
56 bytes from 192.168.3.1: icmp_seq=3 time=0.0 ms
56 bytes from 192.168.3.1: icmp_seq=4 time=0.0 ms
56 bytes from 192.168.3.1: icmp_seq=5 time=0.0 ms
56 bytes from 192.168.3.1: icmp_seq=6 time=0.0 ms
56 bytes from 192.168.3.1: icmp_seq=7 time=0.0 ms
56 bytes from 192.168.3.1: icmp_seq=8 time=0.0 ms
56 bytes from 192.168.3.1: icmp_seq=9 time=0.0 ms
10 packets transmitted, 10 received, 0% packet loss, time 10110 ms
rtt min/avg/max/mdev = 0.000/0.000/0.000/0.000 ms
nsh> ifconfig
eth0 Link encap:Ethernet HWaddr 1e:6d:59:31:be:9a at RUNNING mtu 1486
inet addr:192.168.3.218 DRaddr:192.168.3.1 Mask:255.255.255.0
IPv4 TCP UDP ICMP
Received 000e 0000 0002 000a
Dropped 0002 0000 0000 0000
IPv4 VHL: 0000 Frg: 0000
Checksum 0000 0000 0000 ----
TCP ACK: 0000 SYN: 0000
RST: 0000 0000
Type 0000 ---- ---- 0000
Sent 000c 0000 0002 000a
Rexmit ---- 0000 ---- ----
nsh>
```
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