PN7150 i2C no acknowledge with nfc nci

andreas_willig — Tue, 06 Oct 2020 15:27:02 GMT

Hello everyone, hello @IvanRuiz,

i got a customer board based on Toradex imx6ull SOM. There is a PN7150 RFID connected using I2C on default address (0x28).

When trying to come up with NCI Library i get strange No ACKs, which prohibit the device to be started correctly.

The PN7150 is connect with Configuration 1 (Only 3.3V) not like on OM eval board (where C2 is used with 5V and 3.3 V), but this should not cause I2C not to be acked isn't it?

What i did see during observation is, that the PN7150 has more data to send in case of error, which seems not to be received by NCI Lib.

To hit the error i currently use: nfcDemoApp poll

[ 148.777720] pn5xx-read: 00000000: 41 01 01 A..
[ 148.785725] i2c i2c-0: <i2c_imx_xfer>
[ 148.785735] i2c i2c-0: <i2c_imx_start>
[ 148.785949] i2c i2c-0: <i2c_imx_bus_busy>
[ 148.785965] i2c i2c-0: <i2c_imx_xfer> transfer message: 0
[ 148.785978] i2c i2c-0: <i2c_imx_xfer> CONTROL: IEN=1, IIEN=1, MSTA=1, MTX=1, TXAK=1, RSTA=0
[ 148.785990] i2c i2c-0: <i2c_imx_xfer> STATUS: ICF=1, IAAS=0, IBB=1, IAL=0, SRW=0, IIF=0, RXAK=1
[ 148.786000] i2c i2c-0: <i2c_imx_read> write slave address: addr=0x51
[ 148.786140] i2c i2c-0: <i2c_imx_trx_complete> TRX complete
[ 148.786150] i2c i2c-0: <i2c_imx_acked> ACK received
[ 148.786158] i2c i2c-0: <i2c_imx_read> setup bus
[ 148.786168] i2c i2c-0: <i2c_imx_read> read data
[ 148.786298] i2c i2c-0: <i2c_imx_trx_complete> TRX complete
[ 148.786309] i2c i2c-0: <i2c_imx_read> clear MSTA
[ 148.786318] i2c i2c-0: <i2c_imx_bus_busy>
[ 148.786335] i2c i2c-0: <i2c_imx_read> read byte: B0=0x0
[ 148.786350] i2c i2c-0: <i2c_imx_xfer> exit with: success msg: 1
[ 148.787370] pn5xx-read: 00000000: 00 .
[ 148.796170] i2c i2c-0: <i2c_imx_xfer>
[ 148.796185] i2c i2c-0: <i2c_imx_start>
[ 148.796600] i2c i2c-0: <i2c_imx_bus_busy>
[ 148.796620] i2c i2c-0: <i2c_imx_xfer> transfer message: 0
[ 148.796632] i2c i2c-0: <i2c_imx_xfer> CONTROL: IEN=1, IIEN=1, MSTA=1, MTX=1, TXAK=1, RSTA=0
[ 148.796645] i2c i2c-0: <i2c_imx_xfer> STATUS: ICF=1, IAAS=0, IBB=1, IAL=0, SRW=0, IIF=0, RXAK=1
[ 148.796656] i2c i2c-0: <i2c_imx_read> write slave address: addr=0x51
[ 148.796847] pn5xx-write: 00000000: 21 00 0d 04 04 03 02 05 03 03 80 01 80 03 02 01 !...............
[ 148.806145] i2c i2c-0: <i2c_imx_trx_complete> TRX complete
[ 148.806155] i2c i2c-0: <i2c_imx_acked> No ACK
[ 148.806164] i2c i2c-0: <i2c_imx_stop>
[ 148.806172] i2c i2c-0: <i2c_imx_bus_busy>
[ 148.806196] i2c i2c-0: <i2c_imx_xfer> exit with: error: -6
[ 148.807220] pn54x_dev_read: i2c_master_recv returned -6

NCI Log:

NxpTml: PN54X - I2C Read successful.....

NxpNciR: len = 6 > 400003001100
NxpTml: PN54X - Posting read message.....

NxpHal: read successful status = 0x0
NxpHal: Response timer stopped
NxpHal: Checking response
NxpTml: PN54X - Read requested.....

NxpTml: PN54X - Invoking I2C Read.....

NxpTml: PN54X - Write requested.....

NxpTml: PN54X - Invoking I2C Write.....

NxpTml: _i2c_read() [hdr] errno : 6
NxpTml: PN54X - Error in I2C Read.....

Any Help is very appreciated, things did work with PN7120, when switched to (production) PN7150 we faced this problem.

Thanks in advance

Andreas

P.S.: sry did post this one within i.MX Board in the first

topic PN7150 i2C no acknowledge with nfc nci in NFC

PN7150 i2C no acknowledge with nfc nci