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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hello fellow PPC developers. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>My name is Max MacLean, a new subscriber to this list. Thanks for taking my call.<o:p></o:p></p><p class=MsoNormal>Since I cannot find a way to easily search the archives, I’ll ask directly. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Is anyone working on or aware of a patch the MPC52xx_uart driver to provide a ‘low_latency’ option.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I want to be able to do this (in c++)<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>struct serial_struct ss;<o:p></o:p></p><p class=MsoNormal>if(ioctl(m_iSerial, TIOCGSERIAL, &ss))<o:p></o:p></p><p class=MsoNormal>{<o:p></o:p></p><p class=MsoNormal> ss.flags |= ASYNC_LOW_LATENCY;<o:p></o:p></p><p class=MsoNormal> ioctl(m_iSerial, TIOCSSERIAL, &ss))<o:p></o:p></p><p class=MsoNormal>}<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>or from command line type setserial /dev/ttyPSC1 low_latency<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am trying to get data from my fifo into Linux faster. I am currently seeing a 3-8 msec latency<o:p></o:p></p><p class=MsoNormal>between characters read in the uart and arrival at the tty. It seems like it’s a problem that<o:p></o:p></p><p class=MsoNormal>has been solved on other platforms <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>best regards, <o:p></o:p></p><p class=MsoNormal> Max<o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#35D4C7'>__________________________________</span><span style='color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:13.5pt;font-family:"Verdana","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#616566'>Maxwell MacLean</span></b><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#616566'> </span><span style='font-size:9.0pt;font-family:"Verdana","sans-serif";color:#616566'>| </span><span style='font-size:10.0pt;color:#595959'>Senior Firmware Engineer</span><span style='color:#616566'> <br></span><b><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#616566'>SYMBOTIC LLC</span></b><span style='font-size:13.5pt;font-family:"Verdana","sans-serif";color:black'><o:p></o:p></span></p></div></body></html>