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Altera_Forum
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9 years ago

HPS GPIO's ouputs stuck in high impedence?

I have an issue regarding a custom board the GPIOs where all the HPS IO’s are set to high impedance no matter to how they are set. I have tested the following: GPIO system on linux enablin...
Altera_Forum's avatar
Altera_Forum
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9 years ago

Hi kyle,

thanks for your reply.I tried the way you told using the Linux but this did not work.The GPIO was not accessible.so from linux itself I am not able to control.if we solve this then user space code will work.

My Assignment editor looks like this the 2 rows for each pin

original

To:GPIO_1[1] Assignment name-> Location PIN_Name(value) Enabled(yes)

GPIO_1[1] Assignment name-> I/O standard 3.3V LVTTL(value) Enabled(yes)

My changed version

To:GPIO_1[1] Assignment name-> HPS_IO ON(value) Enabled(yes)

GPIO_1[1] Assignment name-> I/O standard 3.3V LVTTL(value) Enabled(yes)

Is this correct ??.. Like this I need to enable for all other pins.Is there any thing I missed assigning here???..Let me know.Any configuration changes.

In the device option also I have chooseb UNUSED pin as INPUT state TRIGERRED.

created the .SOF and programmed and ran the linux command but did not work..Kindly let me know if you see any errors here

thanks in advance

--Ravi