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TDA4VM: Board to Board communication via I2C

felix_123
Expert 1251 points
Part Number: TDA4VM

Hi TI,

I want to establish a communication between two J721e Boards via I2C bus. 

The documentation of PSDK RTOS I2C chapter (software-dl.ti.com/.../i2c.html) mentions, that there was (?) an example project named I2C_master/slave which is exactly what I am looking for. Unfortunetaly, this project can not be build for J721e platform. 

Is there any similar example, which shows how to communicate between two j721e boards via I2C?

Thanks for your help and best regards,

Felix

  • 0
    TI__Mastermind 42135 points

    Hi Felix,

    This example is not available for j721e, but you can port it from AM65xx.
    Also, can you tell if you are using a custom board or a TI EVM?

    Regards,
    Parth

  • 0 in reply to Parth Nagpal
    Expert 1251 points

    Hi Parth, 

    thanks for your hint. I am using TI EVM Board J721E. Additionally. can you can you recommend any I2C Pins, which are easily accessible on Common Processor Board /SoM Board? (I do not have any additional expansion boards like GESI).

    Thanks again and best regards,

    Felix

  • 0 in reply to felix_123
    Expert 1251 points

    Update: I downloaded PSDK RTOS for AM65xx (Version 08.00). But there are also no source files available to build I2C Master or Slave app.

    felix@felix-virtual-machine:~/ti/pdk_am65xx_08_00_00_36/packages/ti/build$ make I2C_Master_TestApp
Nothing to be done for j721e I2C_Master_TestApp
felix@felix-virtual-machine:~/ti/pdk_am65xx_08_00_00_36/packages/ti/build$ make I2C_Slave_TestApp
Nothing to be done for j721e I2C_Slave_TestApp
felix@felix-virtual-machine:~/ti/pdk_am65xx_08_00_00_36/packages/ti/build$ make I2C_Master_TestApp BOARD=am65xx_evm
Nothing to be done for am65xx I2C_Master_TestApp
felix@felix-virtual-machine:~/ti/pdk_am65xx_08_00_00_36/packages/ti/build$ make I2C_Slave_TestApp BOARD=am65xx_evm
Nothing to be done for am65xx I2C_Slave_TestApp
felix@felix-virtual-machine:~/ti/pdk_am65xx_08_00_00_36/packages/ti/drv/i2c/test$ ls
eeprom_read

  • +1 in reply to felix_123
    TI__Mastermind 42135 points

    Hi Felix,

    Apologies for wrong information in the previous post. You can find the master slave example in AM57x RTOS SDK at <pdkInstallPath>\packages\ti\drv\i2c\test\master_slave\src. You can refer it there,. Once again sorry for the trouble caused due to wrong information in the previous post.

    Regards,
    Parth

  • +1 in reply to felix_123
    TI__Guru 52335 points

    I2C0 is available on header J9 on the Common Processor board (pin 1: SCL, pin 3: SDA, pin 2: GND)