i am using the BF537 evaluation Board and I have a problem with the vdk device drivers. I've programmed a UART module to communicate with an other card. The transmiting of data is no problem. The other card receives the string correctly. But if the other card transmits a string back the the event of the callback functions points to overrun error.
Also strange is that when the other card sends only a character the Blackfin doesn't create a callback, but when the other card sends two character "AB" the blackfin creates two callbacks with overrun error and the receive buffer is filled with the last character "B".