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greenlantern01's avatar
greenlantern01
Icon for Occasional Contributor rankOccasional Contributor
1 month ago

LTC Connector DE10-Standard FPGA

I am trying to access the I2C bus on the LTC connector on the DE10 Standard FPGA board.  I have enabled the i2c controllers on the HPS. How do I now gain access to the i2c2 pins that are connected ...
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Programmable Logic Device
greenlantern01's avatar
greenlantern01
Icon for Occasional Contributor rankOccasional Contributor
1 month ago

I was able to figure out the way to control the HPS GPIO using the GPIO controllers. HPS_LTC_GPIO is at GPIO40 and HPS_LED is at GPIO53.

 

GPIO[57:29] are controlled by GPIO1 Controller. Below is the address map for the GPIO controllers:

 

 

 

 

 

 

 

 

 

 

I wrote a C program to be able to control the LED and set the HPS_LTC_GPIO to low. The code works for blinking the HPS LED. It should also work for the HPS_LTC_GPIO and I should be able to access the I2C bus on the LTC Connector, however, the HPS still communicates with the Gsensor. 

Could you suggest what other things I could try? 

I have attached my code to this message. 

 

  • KianHinT_altera's avatar
    KianHinT_altera
    Icon for Frequent Contributor rankFrequent Contributor
    1 month ago

    Sorry for the delay in responding back, is it possible for you to probe the physical HPS_LTC_GPIO/GPIO40 to see whether it toggles when your code set the pin to low to confirm whether it is switching (via multimeter ?)

    How about the I2C2 pin mux settings? Pins are assigned to HPS ?

    Did a search on past topics and looks like there is some discussion on the clock , see whether is it similar issue

    https://community.altera.com/discussions/fpga-device/how-change-i2c-clock-on-cyclone-v-hps--terasic-de10-nano/266788

    Thanks

    Regards

    Kian

     

    • greenlantern01's avatar
      greenlantern01
      Icon for Occasional Contributor rankOccasional Contributor
      1 month ago

      Hello Kian,

      Thanks for sharing this information. I will work on it and give an update on this.

      Regards