WhyCan Forum(哇酷开发者社区)

angelsan

会员

注册时间： 2020-04-02

已发帖子： 139

积分： 131.5

bsp， I2C出错，求教

基于Qinhao 的 bsp linux 3.4，硬件是licheepi_zero。I2C出错，是怎么回事呢？

# i2cdetect -y 1
     0  1  2  3  4  5  6  7  8  [   14.707574] sunxi_i2c_do_xfer()985 - [i2c1] incomplete xfer (status: 0x20, dev addr: 0x3)
9  a  b  c  d  e  f
00:        [   14.720161] sunxi_i2c_do_xfer()985 - [i2c1] incomplete xfer (status: 0x20, dev addr: 0x4)
  -- -- [   14.732414] sunxi_i2c_do_xfer()985 - [i2c1] incomplete xfer (status: 0x20, dev addr: 0x5)
-- [   14.742308] sunxi_i2c_do_xfer()985 - [i2c1] incomplete xfer (status: 0x20, dev addr: 0x6)
-- [   14.752161] sunxi_i2c_do_xfer()985 - [i2c1] incomplete xfer (status: 0x20, dev addr: 0x7)
-- [   14.762065] sunxi_i2c_do_xfer()985 - [i2c1] incomplete xfer (status: 0x20, dev addr: 0x8)