Re: EED0 signal state at power up - RS485
Bruce Boyes <[email protected]>
| Newsgroups | gmane.comp.hardware.microcontrollers.tini |
|---|---|
| Message-ID | <[email protected]> |
At 09:45 AM 2/25/2004 -0600, Bryan Armstrong wrote: >Massimo Piovera wrote: >>I know that what you suggest work fine. But consider a RS485 net where >>every TINI system is a client. It occupies the line only when >>it is reply to master requests. All work fine. Now I want to restart >>only one TINI system of the RS485 net. In this moment all the traffic >>on RS485 line is blocked because the TINI that is restarting force >>the DTR to occupies the line. >>What I suggest (if possible), is to avoid that at power up the EED0 >>signal is on the same state of that set by setDTR(true) function. > >The default state of that pin during hardware reset and immediately after >reset is released can not be changed. The SMC chip has control. You could use an external UART such as SBX2 which does not have these problems. You also then need our STEP board. But we do have numerous customers using this combination on RS485 networks in commercial applications: http://www.systronix.com/tini/step.htm http://www.systronix.com/expansion/sbx2/sbx2.htm Regards Bruce ------- WWW.SYSTRONIX.COM ---------- Real embedded Java and much more www.jrealtime.com and www.tstik.com +1-801-534-1017 Salt Lake City, USA _______________________________________________ TINI mailing list TINI-6tN4nzCoH/[email protected] To UNSUBSCRIBE, edit your profile, or see list archives: http://lists.dalsemi.com/mailman/listinfo/tini