Posted on May 17, 2011 at 09:54I've looked through the demos, and none cover this issue.
I am using the VCOM example as my base, and I am trying to get around 500kb/sec transfer rates. I do not have an UART on the other end (I stripped that out).
The problem I have is that I do not seem to be able to send more than 64 bytes per frame. I know that with a full speed bus I should be able to get 19 packets per frame, or 64*19= 1.216Mb/sec
I have tried re-loading my endpoint on EP1_IN_Callback with more data, but that still didnt work. I have a fifo where I load 256bytes at a time for test, and here is my code for my endpoint callback
void EP1_IN_Callback(void)
{
char length;
char i=1;
if(fifo.num_free
//we still have data to write on this endpoint, write it.
length= read_fifo(&fifo,&us0_tx_buf[0],64);
UserToPMABufferCopy(&us0_tx_buf[0], ENDP1_TXADDR, length);
SetEPTxCount(ENDP1,length);
SetEPTxValid(ENDP1);
}
count_in =0;
}
But that does not work. Any suggestions on how to get my data rates increased above the 64k? Thanks
Daniel
