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Honored Contributor
Honored ContributorFIFOed Avalon Uart
I have posted the FIFOed avalon UART in the Hardware Projects area. It is the standard UART that comes with Nios but it has additional features such as FIFOs and hardware CTS fifoed avalon uar...
Altera_ForumHonored Contributor
Honored ContributorI'm using the FIFOed avalon Uart with HW CTS RTS control flow to send data to a Bluetooth tranceiver at 921Kbps.
The bluetooth tranceiver send the data to a PC through a virtual COM port configured at 921 kbps too. My problem is that from time to time one byte send by software seems to be sent twice by hardware !!! I send 1MByte through the Fifoed Uart in high speed so flow control is often used by the bluetooth tranceiver, according to bluetooth datarate.. It seems that when Fifo goes full or goes empty and then goes to in between state, the last or first byte is send twice. I can see that in the file received : it's almost perfect, but sometines there is a duplicated byte. I can see that all over the file in no coherant manner.. FIFO lenght : 1024 Circular buffer lenght : 4096 Does someone could try to explain what happens ?? Thanxxx
