Blueboard_PNEV12B with i.MX7D Processor (I2C)

[janinest]

I have the Blueboard_PNEV12B connected over I2C to a i.MX7D Processor running embedded Linux with Kernel version 4.9. 

I would like to know the recommended approach to get the two talking to one another.

I read several options online but I am unsure which is the correct one to pursue. There are examples using the nxp-pn5xx kernel driver together with linux_libnfc-nci. But I am unsure if this solution also works for the PN512? Another option might be using the NFC Reader Library for Linux. But as far as I can tell the only supported communication would be through SPI?

Any help would be really appreciated. Thank you.

[janinest]

Hi Igor

thank you for your response. I followed the tutorial but had to do several modifications:

nxp-pn5xx: I am unable to register my device "PN512", in order to get an entry under /dev/pn5** I had to use pn547.

like in the example. I get the following entries on my imx7 searching for "pn5" so this seemed to work.

./dev/pn544
./etc/libnfc-nxp-pn547.conf
./etc/libnfc-nxp-pn548.conf
./lib/modules/4.9.144+g5758a8e/kernel/drivers/misc/nxp-pn5xx
./lib/modules/4.9.144+g5758a8e/kernel/drivers/misc/nxp-pn5xx/pn5xx_i2c.ko
./sys/kernel/debug/regulator/reg-dummy-regulator-dummy/2-0028-nxp,pn54x-sevdd
./sys/kernel/debug/regulator/reg-dummy-regulator-dummy/2-0028-nxp,pn54x-pmuvcc
./sys/kernel/debug/regulator/reg-dummy-regulator-dummy/2-0028-nxp,pn54x-vbat
./sys/kernel/debug/regulator/reg-dummy-regulator-dummy/2-0028-nxp,pn54x-pvdd
./sys/devices/platform/reg-dummy/regulator/regulator.0/2-0028-nxp,pn54x-vbat
./sys/devices/platform/reg-dummy/regulator/regulator.0/2-0028-nxp,pn54x-sevdd
./sys/devices/platform/reg-dummy/regulator/regulator.0/2-0028-nxp,pn54x-pvdd
./sys/devices/platform/reg-dummy/regulator/regulator.0/2-0028-nxp,pn54x-pmuvcc
./sys/devices/virtual/misc/pn544
./sys/class/misc/pn544
./sys/firmware/devicetree/base/soc/aips-bus@30800000/i2c@30a40000/pn547@28
./sys/bus/i2c/drivers/pn544
./sys/module/pn5xx_i2c
./sys/module/pn5xx_i2c/drivers/i2c:pn544
./var/lib/opkg/info/kernel-module-pn5xx-i2c-4.9.144+g5758a8e.postrm
./var/lib/opkg/info/kernel-module-pn5xx-i2c-4.9.144+g5758a8e.list
./var/lib/opkg/info/kernel-module-pn5xx-i2c-4.9.144+g5758a8e.control
./var/lib/opkg/info/kernel-module-pn5xx-i2c-4.9.144+g5758a8e.postinst
./proc/irq/115/pn547

I am also able to compile the NFC Library and to install the library files to my BSP. I can run the "nfcDemoApp poll" and here is the output of the program:

root@colibri-imx7:/# nfcDemoApp poll
#########################################################################################
## [ 1445.549368] pn54x_dev_open : 10,55
[ 1445.555054] pn54x_dev_ioctl, cmd=1074063617, arg=1
NFC demo [ 1445.562590] pn544_enable power on
##
#########################################################################################
## Poll mode activated ##
#########################################################################################
... press enter to quit ...

[ 1445.782844] pn54x_dev_ioctl, cmd=1074063617, arg=0
[ 1445.787666] pn544_disable power off
[ 1446.002864] pn54x_dev_ioctl, cmd=1074063617, arg=1
[ 1446.007685] pn544_enable power on
[ 1447.126082] pn54x_dev_ioctl, cmd=1074063617, arg=1
[ 1447.130927] pn544_enable power on
[ 1447.352891] pn54x_dev_ioctl, cmd=1074063617, arg=0
[ 1447.357708] pn544_disable power off
[ 1447.582857] pn54x_dev_ioctl, cmd=1074063617, arg=1
[ 1447.587678] pn544_enable power on
[ 1448.705237] pn54x_dev_ioctl, cmd=1074063617, arg=1
[ 1448.710062] pn544_enable power on
[ 1448.932848] pn54x_dev_ioctl, cmd=1074063617, arg=0
[ 1448.937666] pn544_disable power off
[ 1449.152835] pn54x_dev_ioctl, cmd=1074063617, arg=1
[ 1449.157655] pn544_enable power on
[ 1450.275176] pn54x_dev_ioctl, cmd=1074063617, arg=1
[ 1450.280001] pn544_enable power on
[ 1450.502798] pn54x_dev_ioctl, cmd=1074063617, arg=0
[ 1450.507618] pn544_disable power off
[ 1450.722843] pn54x_dev_ioctl, cmd=1074063617, arg=1
[ 1450.727662] pn544_enable power on

Observing the I2C bus with a MSO I can see bytes being written to the PN512, but the PN512 is not responding.

In the document

https://community.nxp.com/docs/DOC-329733

There is a discussion open if the pn544 is able to use the linux_libnfc-nci library. Does this apply for the PN512 as well?

Best regards,

Janine

[igorpadykov]

Hi Janine

unfortunately this part is not officially supported in nxp bsps,

for help with its integration may be recommended to proceed with

 Commercial Support and Engineering Services | NXP 

Best regards
igor

[igorpadykov]

Hi Janine

one can look at below link and try to reuse it for i.MX7D

NFC PN7120 on the i.MX6Q 

nfc with i2c :

GitHub - NXPNFCLinux/nxp-pn5xx: NXP's NFC Open Source Kernel mode driver 

Best regards
igor
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