PN7120 integration with android

[venkatesansubbu]

Trying to integrate PN7120 with android system. getting following messages

[   70.817523] pn54x_dev_open : 10,56

[   70.875924] pn54x_dev_ioctl, cmd=1074063617, arg=1

[   70.972485] pn544_enable power on

[   71.229363] pn54x_dev_ioctl, cmd=1074063617, arg=0

[   71.253630] pn544_disable power off

[   71.491964] pn54x_dev_ioctl, cmd=1074063617, arg=1

[   71.497000] pn544_enable power on

[   71.669942] pn54x_dev_write : i2c_master_send returned -121

[   71.772276] pn54x_dev_write : i2c_master_send returned -121

[   71.857472] pn54x_dev_write : i2c_master_send returned -121

[   71.965402] pn54x_dev_write : i2c_master_send returned -121

[   71.983767] pn54x_dev_write : i2c_master_send returned -121

[   72.003583] pn54x_dev_write : i2c_master_send returned -121

[   72.017645] pn54x_dev_ioctl, cmd=1074063617, arg=1

[   72.025201] pn544_enable power on

[   72.239459] pn54x_dev_ioctl, cmd=1074063617, arg=0

[   72.251812] pn544_disable power off

[   72.459436] pn54x_dev_ioctl, cmd=1074063617, arg=1

[   72.470346] pn544_enable power on

[   72.591335] pn54x_dev_ioctl, cmd=1074063617, arg=2

[   72.659337] pn544_enable power on with firmware

[   72.722492] pn544_enable Unused Firm GPIO 2

[   72.843934] pn54x_dev_ioctl, cmd=1074063617, arg=0

[   72.869792] pn544_disable power off

[   72.989573] pn54x_dev_ioctl, cmd=1074063617, arg=1

[   73.002045] pn544_enable power on

Not able to ON the NFC in android setting.

May I get any help.

regards

venkat

Baytech

[weidong_sun]

Hello venkatesan,

     According to logs you sent, NFC device has been driven successfully in linux kernel, becuase NFC app could open it(see logs of No.1 line)

     Correct logs is here: NFC PN7120 on the i.MX6Q , see "6. TESTING NFC READER" in it. So now, the main issue of your system is I2C communication.

     From ERROR definitions in error.h of linux: #define EREMOTEIO 121 /* Remote I/O error */ , Host I2C can't read and write data from/to PN7120 device, so I suggest you had better take some time to check hardware, as for reference, the following items possibly cause I2C bus communication failed.

1. The value of pull-up resistor is too big.

2. devices on i2c bus are more than 4

3. lines of i2c bus are too long

  Above 2 & 3 can both cause load capacitor bigger, and affect i2c bus communication.

  So please try to check hardware issue at frist!

Best Regards,

Weidong

[venkatesansubbu]

The PN7120 kit is working findé in Linux. The same hardware interface is used for Android Lollipop. Still we connected the 1K resistor for pull-up in I2c bus. But the same error persist.

In the logcat, it is looking for libpn548ad_fw.so. is it correct for PN7120 setup.

We followed the same patches mentioned in the porting guide.

May I get guidance in resolving this issue.

regards

venkat

baytech

[weidong_sun]

Hello venkat,

    OK, since PN7120 works fine on linux platform, it means hardware is no probelm, then please check the following info:

(1) Your android version.

Is your android verison is android 5.1.1 ? Our patches of PN7120 is for version 5.1.1

(2)libpn548ad_fw.so file

PN7120 doesn't need the firmware, because all firmwares are fixed in PN7120. so please check if android's corresponding configurations set path for PN7120.

Best Regards,

Weidong

[venkatesansubbu]

Yes. it is correct. The issue is in AOSP compilation. the chip is not properly selected in one of the Android.mk file.

Now it is working fine

[sawan_roy]

hi venkatesansubbu,
Can ypu please let me know exact path and change for same issue.
I am having i2c error as -107 and device is based on qualcom

[venkatesansubbu]

But it is working fine for 5.1.0 version