TCP tx FIFO size

Embedded Devices NET+OS
1

I am having troubles with a stream of packets from a Digi ME-9210 to a PC. Every dozen or so packets I get a packet that is all CC CC CC CC… I thought that maybe the tx fifo was being overrun, so I added a select() write FIFO check, but that didn’t help.

What is the default TX fifo size and how do I change it? I need to crank it up to at least 32K.

Thanks,
-Erik

2

I think you’re looking for TX_BUF_SIZE in src/bsp/devices/common/newserial/camry_serl.h, which is 8k by default. This changes the serial drivers transmit buffer size it uses, and you can’t change the size of the TX FIFO of the UART…

3

Thanks for the reply.

Serial Ports aren’t a problem. I am using SPI anyway.

I am referring to the TCP/IP TX buffer.

-Erik