...

 

Hello, should I load any module for using SPI to communicate with NFC reader PN532?

My device is opi  one and itead PN532 nfc reader.

 

BTW, If I try to use i2cdetect, dmesg get flooded by error message.

Here is a part of error message :

[ 2099.048399] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0x3)

[ 2099.048624] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0x4)

[ 2099.048855] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0x5)

[ 2099.049067] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0x6)

[ 2099.049276] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0x7)

[ 2099.049484] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0x8)

[ 2099.049690] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0x9)

[ 2099.049897] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0xa)

[ 2099.050226] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0xb)

[ 2099.050467] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0xc)

[ 2099.050683] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0xd)

[ 2099.050898] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0xe)

[ 2099.051129] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0xf)

[ 2099.051444] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0x10)

[ 2099.051653] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0x11)

...

[ 2099.073045] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0x6f)

[ 2099.073312] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0x70)

[ 2099.073517] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0x71)

[ 2099.073723] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0x72)

[ 2099.073927] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0x73)

[ 2099.074133] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0x74)

[ 2099.074338] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0x75)

[ 2099.074544] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0x76)

[ 2099.074749] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0x77)

 

[ 2099.073045] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0x6f)

[ 2099.073312] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0x70)

[ 2099.073517] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0x71)

[ 2099.073723] sunxi_i2c_do_xfer()980 - [i2c0] incomplete xfer (status: 0x20, dev addr: 0x72)

 

 

Hi Larry, I have the same problem like you, messge: "[i2c1] incomplete xfer (status: 0x**, dev addr: 0x**)"

And cannot have i2c work on my orange pi pc, using armbian kernel 3.4.112 Jessie server .

Any help? Thank you.