MicroPython Forum (Archive)

Io16 and 17 are occupied by spiram. You can modify the configuration on the version without spiram and recompile micropython

#GPIO16 - SMI_MDC : MDC (relocateable)
#GPIO17 - SMI_MDIO : MDIO (relocateable)

These two IO can be mapped arbitrarily. I actually tested them with 18 and 23, and they worked perfectly

pythoncoder wrote: ↑

Sat Jan 20, 2018 6:40 am

Apologies. Note to self: check subforum topic. I thought the question related to the Pyboard.

After comparison, lan8720 and lan8742 are completely compatible in basic registers. It can work normally to directly match the drive of lan8742 with the built-in MAC on the boards of f407 and h743

lwipopts.h

#define LWIP_CHECKSUM_CTRL_PER_NETIF 1 -> 0

It can solve the errors of large data packets
However, I believe that the ETH module of H7 can meet the checksum operation of large data packets. The problem should be the initialization setting

Download the package of 1.17 + daily update package from the official website, and the compilation will report the above error
If you clone directly from GitHub, the compilation is correct

After trying pybv11 + w5500, the LwIP system can correctly send 1460 TCP packets, so the restriction is more likely to exist in the ETH layer However, the actual test speed of w5500 is very disappointing. The wired network speed is not as fast as that of esp32. The network Ping operation of h743 is ...

More tests are reported in the GitHub problem. Now it can be determined that the problem is not TCP, but the underlying problem
https://github.com/micropython/micropython/issues/7980

After the firmware of h743 sets MSS greater than 942, sending packets greater than 942 bytes will fail
If MSS is set to be less than 942, the sending process can transmit packets normally
I expect to set the MSS to a maximum of 1460 for normal Ethernet

I also encountered the same problem, compilation error

CC mpnetworkport.c
mpnetworkport.c: In function 'pyb_lwip_poll':
mpnetworkport.c:58:5: error: implicit declaration of function 'wiznet5k_poll' [-Werror=implicit-function-declaration]
58 | wiznet5k_poll();
| ^~~~~~~~~~~~~

[ 84%] Building C object esp-idf/main/CMakeFiles/__idf_main.dir/home/wangshj/myesp32build/micropython-master/py/modcmath.c.obj In file included from /home/wangshj/myesp32build/micropython-master/py/mphal.h:35, from /home/wangshj/myesp32build/micropython-master/py/modbuiltins.c:232: /home/wangshj/mye...