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Altera_Forum's avatar
Altera_Forum
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12 years ago

Help me in audio code, please! (about I2C SCL BASE )

Hi all!!

I applying audio code demo of altera. But when I build project, it had 2 error :

'I2C_SCL_BASE' undeclared (first use in this function) AUDIO.c /audio_de2_115_MTL line 357 C/C++ Problem

and

'I2C_SDA_BASE' undeclared (first use in this function) AUDIO.c /audio_de2_115_MTL line 357 C/C++ Problem

I just found define of them is clk base for SCL. and data base for SDA, but I don't understood what are they? and how to use it?

So, have someone can me me understand it and the way to fix it? Thank you so much!! ( I'm a beginner!!)

Have a nice day every body!!

4 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    12 years ago

    Apparently the code you are compiling is looking for two peripherals in your system, one called i2c_scl and another one i2c_sda, but they aren't present. You should add them to your SOPC Builder or QSys project.

    From the names I'm guessing they are 1 bit bidirectional PIOs.
  • Altera_Forum's avatar
    Altera_Forum
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    12 years ago

    --- Quote Start ---

    Apparently the code you are compiling is looking for two peripherals in your system, one called i2c_scl and another one i2c_sda, but they aren't present. You should add them to your SOPC Builder or QSys project.

    From the names I'm guessing they are 1 bit bidirectional PIOs.

    --- Quote End ---

    Thanks for your advice,Daixiwen!

    I did review my SOPC, it have enough component for audio. And in define of function I2C_write(); the sample code was define I2C_SCL_BASE is clk_base and I2C_SDA_BASE is data_base. But I don't understand what are the address of clk base and data base? I found it in the internet but it haven't had the info. I need!! (T_T")!

    hix hix, Who have another idea please help me (^_^")!!!???
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    12 years ago

    The component you need isn't for audio itself, it is for I2C. If you have a peripheral that is called i2c_scl in your SOPC builder project, then you will have in your BSP a file called system.h that defines I2C_SCL_BASE, among others.

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    12 years ago

    Oh!! Thank you so much, Daixiwen (^_^), I review my SOPC again, and recognized something I need into my project!

    Have a nice day!