topic IIC I2c_AsyncTransmit Call Error in S32K

IIC I2c_AsyncTransmit Call Error

qiu — Tue, 28 Mar 2023 07:39:11 GMT

Hello

I used NXP S32k Chip,and use the I2c_AsyncTransmit function in the task to start a iic communication.

Normally It works ok. But I use a short circuit SDL and SCL to trigger an IIC error , then restore the circuit to normal.The IIC channel status is always SEND,and never comes to Finish,so IIC communication is always error.

I use I2c_SyncTransmit function,and do the same operation, it will recovery.IIC communication will be ok.

Re: IIC I2c_AsyncTransmit Call Error

DanNguyenDuy — Fri, 31 Mar 2023 06:28:40 GMT

Hi @qiu,

What is the package's name you are using? (for example: S32K14X_MCAL4_2_RTM_1_0_4)

Best regards,

Dan

Re: IIC I2c_AsyncTransmit Call Error

qiu — Mon, 03 Apr 2023 01:27:47 GMT

Hi, Dan

S32K14X_MCAL4_2_RTM_HF6_1_0_2

Best regards,

Qiu

Re: IIC I2c_AsyncTransmit Call Error

DanNguyenDuy — Fri, 07 Apr 2023 11:25:33 GMT

Hi @qiu,

The I2c_AsyncTransmit method use LPI2C interrupt to transmit data. when an error occur, the driver will disable transmit interrupt bit and perform raise errors. Hence, data can't re-transmit after restore the circuit to normal if you didn't re-call I2c_AsyncTransmit function again. But if you call this function in the ErrorNotification function then will have some errors will occur because LPI2C interrupt called to ErrorNotification function and the I2c_AsyncTransmit function will be raised a new LPI2C interrupt.

So, I created an example for your situation and I tested successful from my side. Please check in the attachment file.

Best regards,

Dan

Re: IIC I2c_AsyncTransmit Call Error

DELPHI_Eric — Mon, 03 Jul 2023 06:38:53 GMT

master sync send

I2c master sync send error, 100K

It can be transmitted normally through oscilloscope observation the slave device address send out OK
but no slave device response ACK, so it ran at
I2c_aeChannelStatus[s8LogicalChannel] = I2C_CH_ERROR_PRESENT; return NO_OK
How can I test the master sync send use S32K14x MCAL.