This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LP8860-Q1: 无法向寄存器0x66写入值

Part Number: LP8860-Q1

Hi,TI

我想用LP8860-Q1实现控制背光但是遇到了问题,能帮忙看一下吗?

1.通过i2c想将寄存器0x66的BRT_MODE设置为10,利用i2cset向0x66中写入0xb2,命令执行结束,但是寄存器中的值却并未更新,这是因为什么?
2.如果我想要通过I2C控制背光,并调节背光亮度,应该怎么做?
这是我这边dump出来的寄存器数据
console:/bin # i2cdump -f -y 8 0x2d                                            
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f    0123456789abcdef
00: 00 00 0f 7c 00 00 00 00 00 00 00 00 00 0e 08 00    ..?|.........??.
10: 00 00 10 04 50 0f 7c 00 00 80 00 00 00 00 00 00    ..??P?|..?......
20: 00 00 00 00 06 00 00 00 00 00 00 00 00 00 00 00    ....?...........
30: 0b 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ?...............
40: 67 68 69 43 0f d2 aa ff 02 90 a7 34 f2 11 e5 61    ghiC???????4???a
50: 00 de 88 9a d0 00 00 00 00 00 00 00 00 00 00 00    .????...........
60: ef 7c de 81 d7 05 b0 77 77 71 3f b7 17 ef b0 84    ?|?????wwq??????
70: d9 24 e5 f5 3a 16 de ff 3e 00 00 00 00 00 00 00    ?$??:???>.......
80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
谢谢!