mmaclean at symbotic.com
Sat Nov 17 05:05:52 EST 2012
Hello fellow PPC developers.
My name is Max MacLean, a new subscriber to this list. Thanks for taking my call.
Since I cannot find a way to easily search the archives, I'll ask directly.
Is anyone working on or aware of a patch the MPC52xx_uart driver to provide a 'low_latency' option.
I want to be able to do this (in c++)
struct serial_struct ss;
if(ioctl(m_iSerial, TIOCGSERIAL, &ss))
ss.flags |= ASYNC_LOW_LATENCY;
ioctl(m_iSerial, TIOCSSERIAL, &ss))
or from command line type setserial /dev/ttyPSC1 low_latency
I am trying to get data from my fifo into Linux faster. I am currently seeing a 3-8 msec latency
between characters read in the uart and arrival at the tty. It seems like it's a problem that
has been solved on other platforms
Maxwell MacLean | Senior Firmware Engineer
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