127|root@rk3288:/ # i2cdump -f -y 2 0x1a
i2cdump -f -y 2 0x1a
No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 00 00 c4 00 d4 00 e0 00 00 00 08 00 00 00 80 00 ..?.?.?..?..?.
10: 03 00 00 00 b0 00 00 00 00 00 df 00 df 00 88 00 ?..?..?.?.?.
20: 88 00 44 00 30 00 88 00 d8 00 0c 00 00 00 00 00 ?.D.0.?.?.?..
30: 00 00 00 00 80 00 80 00 10 00 00 00 00 00 00 00 …?.?.?..
40: 4e 00 00 00 00 00 00 00 00 00 0f 00 00 00 00 00 N…?..
50: 00 00 20 00 80 00 80 00 00 00 4b 00 07 00 00 00 .. .?.?..K.?..
60: 00 00 00 00 02 00 20 00 05 00 00 00 30 00 00 00 …?. .?..0…
70: 00 00 00 00 00 00 00 00 00 00 00 00 10 00 61 00 …?.a.
80: 00 00 c4 00 d4 00 e0 00 00 00 08 00 00 00 80 00 ..?.?.?..?..?.
90: 03 00 00 00 b0 00 00 00 00 00 df 00 df 00 88 00 ?..?..?.?.?.
a0: 88 00 44 00 30 00 88 00 d8 00 0c 00 00 00 00 00 ?.D.0.?.?.?..
b0: 00 00 00 00 80 00 80 00 10 00 00 00 00 00 00 00 …?.?.?..
c0: 4e 00 00 00 00 00 00 00 00 00 0f 00 00 00 00 00 N…?..
d0: 00 00 20 00 80 00 80 00 00 00 4b 00 07 00 00 00 .. .?.?..K.?..
e0: 00 00 00 00 02 00 20 00 05 00 00 00 30 00 00 00 …?. .?..0…
f0: 00 00 00 00 00 00 00 00 00 00 00 00 10 00 61 00 …?.a.
root@rk3288:/ # i2cset -f -y 2 0x1a 0x00 0x12
i2cset -f -y 2 0x1a 0x00 0x12
root@rk3288:/ # i2cget -f -y 2 0x1a 0x00
i2cget -f -y 2 0x1a 0x00
0x00
通过i2cset设置里寄存器的值、读取出来为什么还是原始的值