New ContributorLoan IO for UART doesn't work in QPS
Hi there,
already asked a similar question, but I just can't get a proper answer. Coming from this:
[1] https://forums.intel.com/s/question/0D50P00004NVx2bSAD/how-can-i-use-the-loan-io and this
and many other questions, similar to this one.
What I did so far:
In der Platform Designer I added the HPS
After that I selected the pins 49 and 50 in the table
49 and 50 because in the pin planer the pins A22 and B21 are listed as HPS_GPIO 49 and 50
And this is my top entity (I erased all ports and signals for the memory component for better reading)
From [2] I read this:
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.hps_io_hps_io_gpio_inst_LOANIO20 <-- Connect to top level inout pin .loan_io_in <-- Connect to FPGA
logic .loan_io_out <-- Connect to FPGA
logic .loan_io_oe <-- Connect to FPGA logic
The loan_io_oe controls whether the pin is an output. If '1' at the specified location (in this case loan_io_oe[20] = 1'b1), then it is an output, and you can control the pin writing to loan_io_out[20]. To read an input to the FPGA, just read loan_io_in[20], and set loan_io_oe[20] to 0.
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This is why I did assignement in line 32 and 33 and I'm not quite sure, if this is right. I connected the hps_io_hps_io_gpio_inst_LOANIO49/50 signals to the top ports and the loan_io_xx to the signals.
And after that I don't know how to continue, because I only try to read and input and give it back so I can read it in the putty terminal. But no matter what I do, it just doesn't work.
Did I do something wrong?
Did I forget something?
Can anyone provide a simple code, how it should be done?
And plz. I am so thankful for your help, but please no refer to any other forum question, document, video, etc. anymore.
In the last couple of days I read so much and watched so many videos but I couldn't find nowhere an explenation how to work with these pins, but dozens of questions regarding this problem.
Thank you !
