anchao commented on issue #8839:
URL: https://github.com/apache/nuttx/issues/8839#issuecomment-1479657026
@TheCranston
>> That sdio_io_rw_extended error upon boot persists.
>> [ 1.190000] [ 2] sdio_io_rw_extended: error 1
This issue exists in nuttx-9.0, but it does not has any side effect for
initialization of bcmf driver,
This sdio command will only succeed on the second retry, which may be
related to the implementation of firmware.
>> *float*-*float* sec 229376 Bytes *float* Mbits/sec
about word "*float*", you can enable floating point printing to get more
detailed data:
CONFIG_LIBC_FLOATINGPOINT
>> 613Kb/s is not all that speedy.
Yep, the throughput results I tested were even worse,
```bash
nsh> iperf -c 192.168.31.180 -i 1
IP: 192.168.31.138
mode=tcp-client sip=192.168.31.138:5001, dip=192.168.31.180:5001,
interval=1, time=30
Interval Transfer Bandwidth
0.00- 1.01 sec 49152 Bytes 0.39 Mbits/sec
1.01- 2.08 sec 49152 Bytes 0.37 Mbits/sec
2.08- 3.09 sec 49152 Bytes 0.39 Mbits/sec
3.09- 4.14 sec 49152 Bytes 0.37 Mbits/sec
4.14- 5.19 sec 49152 Bytes 0.37 Mbits/sec
5.19- 6.23 sec 49152 Bytes 0.38 Mbits/sec
...
0.00- 30.09 sec 1507328 Bytes 0.40 Mbits/sec
```
I tried adjusting nvram parameters but it doesn't have any improvement:
https://github.com/apache/nuttx/blob/master/boards/arm/stm32/photon/src/stm32_wlan_firmware.c#L44-L103
>> The two pings were separated by ~10mins of idle time. Not sure what's up
there, but it's been consistently loosing network ability after a period of
time. wapi shows that the "SENSE" value goes from -58 to 0.
This issue also exists in nuttx-9.0, after the data communication is
maintained for a certain period of time, the firmware seems enter like state of
power saving, I don't have a clue yet.
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