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Altera_Forum
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10 years ago

Helio board USB and UART serial interface

Hi, I am new to the forum and have been trying to communicate to my Helio board using the USB. In the Helio reference manual, it states that the board has an OTG USB PHY (via USB3300-EZK) and a...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

Does anyone know how to use "special function" pins, such as B19 and C16 on Cyclone V SoC?

These pins are UART_RX and UART_TX, yet I cannot assign them to my signals in the design using the Pin Planner. It gives me the error: "Editing location assignment is not successful. Not assignable.".

If I dierctly edit the QSF file, I still get the compilation warning: "Some pins have incomplete I/O assignments...".