[pmod hygro not reading]

Well, I worked out just now. I just set the sys_clk to 100MHz, and connect the pmod interface ja(3 to 4) to scl, sda. I am using ArtyA7-100T, I am not sure why picking up 100 MHz as the internal clock frequency of board is 450MHz. I get the 14 bit data from hum and tem registers. The VHDL source file is from digikey as is the last post.

[pmod hygro not reading]

On 7/4/2020 at 11:08 AM, Tim S. said:

Months ago, I wrote a Pmod HYGRO driver in VHDL without block diagram. The Pmod HYGRO's I2C requirements are odd. I'd be glad to mention my findings if you are debugging waveform or message-order issues for reading the HYGRO's measurement registers.

Do you mind sharing the Pmod HYGRO VHDL driver file? I am trying to read the data via UART protocol, it seems that I cannot identify if the sensor is working or not. I am not using Vivado IP now, the project is based on vhdl files. There is another vhdl source provided by Scott. It does not help me so far.

https://forum.digikey.com/t/humidity-and-temperature-sensor-pmod-controller-vhdl/13064