From jburney at unifiedinstruments.com Sun Sep 27 14:17:57 2015 From: jburney at unifiedinstruments.com (James Burney) Date: Sun, 27 Sep 2015 14:17:57 -0400 (EDT) Subject: [GPS_Standard] Simplified GPS Freq Std. Problems Message-ID: <856963136.501975.1443377878156.JavaMail.open-xchange@oxuslxltgw01.lxa.perfora.net> Hi Bertrand Zauhar, I am having a few problems with implementing your design, and was hoping you could answer a few questions. First, this is been built on a breadboard, PIC was programed with a data i/o unisite, lastest software was used. My main problem is sending commands to the PIC, first there does not seem to be any echo back of a command sent, and the second, the PIC seems to be very unresponsive to a command sent to it. If I send it the command ? 'enter' I may or may not get the command list, most of the time, I don't get a response back. Should note that I am using Putty on a windows PC and a FTDI232 chip to talk to the PIC here, data send looks good. 4800 baud, 8,n,1. When using the monitoring tool, I am also unable to set any of the parameters with it as well. Below is a sample output from the pic; U|U|03FB0|.|.|236C|0001|FFFF|0001|00 U|U|03FB0|.|.|50C2|0002|FFFE|0002|00 U|U|03FB0|.|.|655D|0003|FFFD|0003|00 U|U|03FB0|.|.|66AC|0004|FFFC|0004|00 U|U|03FB0|.|.|687D|0005|FFFD|0005|00 U|U|03FB0|.|.|68B0|0006|FFFE|0006|00 U|U|03FB0|.|.|6B6A|0007|FFFF|0007|00 U|U|03FB0|.|.|6A4B|0008|0000|0008|00 U|U|03FB0|.|.|CDBB|0009|0001|0009|00 U|U|03FB0|.|.|FEE3|000A|0000|000A|00 U|U|03FB0|.|.|6624|000B|FFFF|000B|00 Any ideas from you as to what I maybe doing wrong here would be of great help. Thank you so much for your time, Jim Burney From dogma2u at gmail.com Sun Sep 27 14:24:09 2015 From: dogma2u at gmail.com (Dogma) Date: Sun, 27 Sep 2015 11:24:09 -0700 Subject: [GPS_Standard] Simplified GPS Freq Std. Message-ID: Hi Bertrand Zauhar, I am having a few problems with implementing your design, and was hoping you could answer a few questions. First, this is been built on a breadboard, PIC was programed with a data i/o unisite, lastest software was used. My main problem is sending commands to the PIC, first there does not seem to be any echo back of a command sent, and the second, the PIC seems to be very unresponsive to a command sent to it. If I send it the command ? 'enter' I may or may not get the command list, most of the time, I don't get a response back. Should note that I am using Putty on a windows PC and a FTDI232 chip to talk to the PIC here, data send looks good. 4800 baud, 8,n,1. When using the monitoring tool, I am also unable to set any of the parameters with it as well. Below is a sample output from the pic; U|U|03FB0|.|.|236C|0001|FFFF|0001|00 U|U|03FB0|.|.|50C2|0002|FFFE|0002|00 U|U|03FB0|.|.|655D|0003|FFFD|0003|00 U|U|03FB0|.|.|66AC|0004|FFFC|0004|00 U|U|03FB0|.|.|687D|0005|FFFD|0005|00 U|U|03FB0|.|.|68B0|0006|FFFE|0006|00 U|U|03FB0|.|.|6B6A|0007|FFFF|0007|00 U|U|03FB0|.|.|6A4B|0008|0000|0008|00 U|U|03FB0|.|.|CDBB|0009|0001|0009|00 U|U|03FB0|.|.|FEE3|000A|0000|000A|00 U|U|03FB0|.|.|6624|000B|FFFF|000B|00 Any ideas from you as to what I maybe doing wrong here would be of great help. From ve2zaz at sympatico.ca Sun Sep 27 19:48:10 2015 From: ve2zaz at sympatico.ca (Bert, VE2ZAZ) Date: Sun, 27 Sep 2015 23:48:10 +0000 Subject: [GPS_Standard] Simplified GPS Freq Std. Problems In-Reply-To: <856963136.501975.1443377878156.JavaMail.open-xchange@oxuslxltgw01.lxa.perfora.net> References: <856963136.501975.1443377878156.JavaMail.open-xchange@oxuslxltgw01.lxa.perfora.net> Message-ID: Hi Jim, Serial port issues are the most common issue reported. They are always rapidly resolved. At least, you know that the system is alive. Do you have access to an oscilloscope? Probe all signals in the TX chain and then in the RX chain. Make sure to observe the TTL TX and RX pulse shapes carefully. Do you have another converter board you could swap? Be suspicious about that FTDI232 board. Did you check the supply carefully on the PIC's pins 20 and 8? These chips can be back-driven from other I/O pins and may run without Vdd applied, though they will behave erratically... Note that the PIC will not echo back on the characters you type. You must turn on echo in Putty if you want to see what you are typing. There is no point trying to use the Montrol S/W until your link is solid. But when you will have fixed the issue, once in Montrol, make sure to press after typing in a parameter value, otherwise the new parameter will not take. This is a simple problem that should be easy to fix. Several hundred of these systems are running, so that should give you confidence... Best. Bert, VE2ZAZ > Date: Sun, 27 Sep 2015 14:17:57 -0400 > From: jburney at unifiedinstruments.com > To: gps_standard at mailman.qth.net > Subject: [GPS_Standard] Simplified GPS Freq Std. Problems > > Hi Bertrand Zauhar, > > > I am having a few problems with implementing your design, and was hoping you > could answer a few questions. > First, this is been built on a breadboard, PIC was programed with a data i/o > unisite, lastest software was used. > > My main problem is sending commands to the PIC, first there does not seem to be > any echo back of a command sent, > and the second, the PIC seems to be very unresponsive to a command sent to it. > If I send it the command ? 'enter' I may or may not get the command list, most > of the time, I don't get a response back. > Should note that I am using Putty on a windows PC and a FTDI232 chip to talk to > the PIC here, data send looks good. > 4800 baud, 8,n,1. > > When using the monitoring tool, I am also unable to set any of the parameters > with it as well. > > Below is a sample output from the pic; > > U|U|03FB0|.|.|236C|0001|FFFF|0001|00 > U|U|03FB0|.|.|50C2|0002|FFFE|0002|00 > U|U|03FB0|.|.|655D|0003|FFFD|0003|00 > U|U|03FB0|.|.|66AC|0004|FFFC|0004|00 > U|U|03FB0|.|.|687D|0005|FFFD|0005|00 > U|U|03FB0|.|.|68B0|0006|FFFE|0006|00 > U|U|03FB0|.|.|6B6A|0007|FFFF|0007|00 > U|U|03FB0|.|.|6A4B|0008|0000|0008|00 > U|U|03FB0|.|.|CDBB|0009|0001|0009|00 > U|U|03FB0|.|.|FEE3|000A|0000|000A|00 > U|U|03FB0|.|.|6624|000B|FFFF|000B|00 > > Any ideas from you as to what I maybe doing wrong here would be of great help. > > Thank you so much for your time, Jim Burney > ______________________________________________________________ > GPS_Standard mailing list > Home: http://mailman.qth.net/mailman/listinfo/gps_standard > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:GPS_Standard at mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html