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snehal_p's avatar
snehal_p
Icon for Contributor rankContributor
3 years ago

How to use hps driven I2C pins

Hello, Can anyone help me with guidelines to use hps driven I2C pins on DE1SOC board Thanks, snehal_p
tehjingy_Altera's avatar
tehjingy_Altera
Icon for Regular Contributor rankRegular Contributor
3 years ago

Hi snehal_p


For the DE1-SOC dev kit, I see that the I2C is connected to a multiplexer in which you will need to toggle the HPS_I2C_CONTROL (HPS_GPIO48) to switch between the FPGA owning the i2c or the HPS.


Once the dev kit boots into the linux environment you could try searching for GPIO48 under the /dev directory to toggle the i2c to HPS.


You could refer to the document below section 3.6.5

https://www.terasic.com.tw/cgi-bin/page/archive_download.pl?Language=China&No=836&FID=ae336c1d5103cac046279ed1568a8bc3



Regards

Jingyang, Teh