Lpc2000

Still working on my UART driver for the LPC2138. Now I'm having
problems with lost Tx data from the LPC to a PC. I don't have a clue
about what I'm doing wrong and I haven't found anything on the web
indicating this is a common problem.

The problem is that sometimes one or a few bytes that I write to the
THR don't show up at the PC. If there is data to be transmitted I
write one byte to the THR (first checking the LSR5 to be really shure
there is  room for a byte). Then I write 16 bytes to the THR every
time I get a THR IRQ (also here checking LSR5 to be 100% sure the FIFO
is empty).

Doing the above results in lost data at the other end. This happens
approximately every 20-50kbytes. I've tried this at different speeds,
even as low as 57600bps. The FIFOs are enabled.

Am I missing something?

/PH