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Jacob11's avatar
Jacob11
Icon for Occasional Contributor rankOccasional Contributor
3 years ago

Nios 2 I2c timeout altera_avalon_i2c.c - timeout never occurs

Hi gang. I am using the altera avalon i2c driver for communication to peripheral devices on my board. I want to read from different i2c addresses to determine if a device is present. For ins...
tehjingy_Altera's avatar
tehjingy_Altera
Icon for Regular Contributor rankRegular Contributor
3 years ago

Hi Jacob


Could you share me the github link to i2c_interface.c that you are referring too?

Are you using the "i2c_interface.c" or the" alt_avalon_i2c.c"?

From the "alt_avalon_i2c_master_tx_rx" function you need to enter the register as part of the buffer.

The "alt_avalon_i2c_master_transmit" will loop through the buffer to transmit the whole array.

I do not see a problem in this implementation.


Regards

Jingyang, Teh





Jacob11's avatar
Jacob11
Icon for Occasional Contributor rankOccasional Contributor
3 years ago

Hello Jingyang.

Sorry, we have been closed for the Christmas break so I am only seeing your response today.

I agree this should work fine since the buffer holds the entire register address and loops through the whole buffer. But it is not working for whatever reason.

The i2c_interface.c is provided to us as confidential from Intel so I cannot publicly share that. Maybe you can poke around at Intel and find it.

I cannot find any flaw in this implementation. I will check again the datasheets of the hardware to make sure I am not missing something.

Thanks,

Jacob