PiyushPatle26 commented on PR #19005:
URL: https://github.com/apache/nuttx/pull/19005#issuecomment-5064666695
Now actual communication also works
```
nsh> i2c bus
BUS EXISTS?
Bus 0: YES
Bus 1: NO
Bus 2: YES
Bus 3: NO
nsh> i2c dev -b 0 0x03 0x77
NOTE: Some devices may not appear with this scan.
You may also try a scan with the -z flag to discover more devices using a
zero-byte write request.
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: 20 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: 50 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
nsh> i2c get -a 0x20 -r 3
READ Bus: 0 Addr: 20 Subaddr: 03 Value: 00
nsh> i2c get -r 0
READ Bus: 0 Addr: 20 Subaddr: 00 Value: 00
nsh> i2c get -a 0x50 -r 0
READ Bus: 0 Addr: 50 Subaddr: 00 Value: ff
nsh> i2c dump -r 0 32
DUMP Bus: 0 Addr: 50 Subaddr: 00
00000000 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
|................|
00000010 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
|................|
nsh> i2c get -a 0x21 -r 0
i2ctool: get: Transfer failed: 1
nsh> i2c get -a 0x20 -r 0
READ Bus: 0 Addr: 20 Subaddr: 00 Value: 00
nsh> i2c get -s -r 3
READ Bus: 0 Addr: 20 Subaddr: 03 Value: 00
nsh> i2c get -n -r 3
READ Bus: 0 Addr: 20 Subaddr: 03 Value: 00
```
address 21 fails which is correct as there is no device
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