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Altera_Forum's avatar
Altera_Forum
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16 years ago

UART not sending characters

I started with the Cylcone 2 development a few months back. If I send a string of 800 characters some of them are not received at the host even at 9600. I tried three different UARTs. Tha avalon v...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Well good news and bad - isn't that the way it always is. I had two tools available to me. The first is BusHound this is a great and reasonably priced tool that will let you see what is happening on SCSI, RS232, USB and some other buses.

Well the RS232 was one of the USB dongle. The Bushound capture showed a whole lot of data followed by a 0 (null) and then my missing data. Ahha the NIOS is to blame.

My second tool is a Serial analyzer. Guess what it shows no lost characters.

So it appears that either the dongle or the driver is to blame. I am off to find a real serial port and see what I get.