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Forum Index : Microcontroller and PC projects : Beta Testers Wanted
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| MOBI Guru  Joined: 02/12/2012 Location: AustraliaPosts: 819 |
Hi all, now I can get serious. I tidied the test jig up a bit. Still need to have the 14049 inverter fitted until my proper USB serial kits turn up. Also shortened the leads on the 10uF Cap. What are others using? My unit is powered from a LM317 3.3v regulator Downwind made about umpteen years ago. The USB serial cable is a CH340. It has ttl voltages but RS232 polarity hence the inverters. The 14049's will work ok at 3.3v. 
David M. |
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Geoffg Guru Joined: 06/06/2011 Location: AustraliaPosts: 3199 |
Now... to find some bugs!! Amazingly, all the bugs found so far have been in the documentation. Geoff Geoff Graham - http://geoffg.net |
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Grogster Admin Group  Joined: 31/12/2012 Location: New ZealandPosts: 9310 |
Do you mean cap wise or serial port wise? If you mean cap, I am using a 47uF 16v tantalum, and if you mean serial port, I am using a native serial port(not a USB adaptor) on a Gigabyte E350N WIN8 motherboard. Smoke makes things work. When the smoke gets out, it stops! |
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| Grogster Admin Group Joined: 31/12/2012 Location: New ZealandPosts: 9310 |
What about entering more then 6 digits for the PIN number?  Smoke makes things work. When the smoke gets out, it stops! |
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| Geoffg Guru Joined: 06/06/2011 Location: AustraliaPosts: 3199 |
The documentation said that you should not do it. A bug is something rather more than that. Geoff Graham - http://geoffg.net |
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atmega8 Guru Joined: 19/11/2013 Location: GermanyPosts: 722 |
Geoff, does it mean there is somthing like a bug errata in the docu? In the user manual ver 4.5 beta3 i can't find something like this. Or does it mean that there are no known bugs so far, except the bugs sitting in front of the monitor;-) THX |
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vasi Guru Joined: 23/03/2007 Location: RomaniaPosts: 1697 |
Actually, atmega8 may qualify as a bug (caterpillar) because it have 28 legs 
Hobbit name: Togo Toadfoot of Frogmorton Elvish name: Mablung Miriel Beyound Arduino Lang |
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| MOBI Guru Joined: 02/12/2012 Location: AustraliaPosts: 819 |
I meant the specific test set up. Photo? David M. |
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| Geoffg Guru Joined: 06/06/2011 Location: AustraliaPosts: 3199 |
No, there is no errata. It is important to realise that this is a beta test, not a production release (where I do supply a change log). In a beta test I need to make changes quickly and that means that the normal rigorous testing and documentation are often not there. Also, you, as a beta tester, are expected to be self sufficient and not require simple support. In the past companies like Microsoft and Google have used beta test as a promotional vehicle for finished code. This is different, this is the real stuff with bugs and evolving documentation. So sorry, when the next beta version is out you will have to scan the manual for changes. Geoff Geoff Graham - http://geoffg.net |
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| robert.rozee Guru Joined: 31/12/2012 Location: New ZealandPosts: 2350 |
that cable looks a lot like it has a db9 connector on the end, which almost certainly guarantees that you're dealing with rs-232 levels at that point - and explains why you need an inverter. please do correct me if i am wrong. btw, i've always had good success with silicon labs CP2102 usb to serial bridges, which can be had for around us$2.30 on ebay (including delivery) and which haven't been cloned like the prolific chips. the TTL output levels of the CP2102 are 3v3 compliant, and the onboard regulator is good for 74mA (100mA-26mA running current) http://www.ebay.com/itm/400565980256 http://www.silabs.com/Support%20Documents/TechnicalDocs/CP21 02-9.pdf rob :-) |
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| MOBI Guru Joined: 02/12/2012 Location: AustraliaPosts: 819 |
Yes, it has a 9 pin connector but the signal levels are 5V and the polarity is inverted like RS232. As the inverter runs happily at 3.3v, I don't have to worry about putting limiting resistors in. David M. |
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| atmega8 Guru Joined: 19/11/2013 Location: GermanyPosts: 722 |
Ok, that's why it didn't work. I tested everything with an ATMEGA8. I should us a PIC;-) |
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| atmega8 Guru Joined: 19/11/2013 Location: GermanyPosts: 722 |
FYI: Left a programmed an working PIC allone under power for some hours. Programm was not running, just the prompt was shown. Comming back terminal Programm showed garbage characters. Shorting tx and rx wihle Power Cycle, no result. Reflashed The PIC and It worked as before. No idea what has happened.... Of course i rebooted the PC, checked the com ports and so on. |
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| Grogster Admin Group Joined: 31/12/2012 Location: New ZealandPosts: 9310 |
So, after being left, you came back, and typed something - it was garbage. Correct? Closed and restarted TT and checked settings - still garbage. Correct? Interesting. I will try an overnight test tonight, and see if the same thing happens to me. Might be worth you running a blinking LED in your next overnight test, to see if the LED is still blinking the next morning, or has the MMBasic interpreter crashed for some reason relating to time. Smoke makes things work. When the smoke gets out, it stops! |
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| atmega8 Guru Joined: 19/11/2013 Location: GermanyPosts: 722 |
Grogster, correct. Same thing with a friend of me. The only equal is, that we bought the same Pic's from the same charge/ distributor. Type is 32MX150F128B-ISP. And my via usb-ttl converter connected PC went into sleep/powersave mode... I have also attached a100nf xr7 between +/-. The microchip datasheet advised this. |
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| MOBI Guru Joined: 02/12/2012 Location: AustraliaPosts: 819 |
I think that if you are getting garbage when you type, there is still a link operating. Just that something like baud rate etc is corrupted? I left mine on all last night and it was still quite happy this morning as it is now. If I give it a hard reset or cycle the power it all continues to works as it should. I'd be loth to blame the 47uF cap either. I tested mine with a cheap 10uF 35v electro and it worked quite well. David M. |
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| Grogster Admin Group Joined: 31/12/2012 Location: New ZealandPosts: 9310 |
Could it be anything to do with the ISP suffix? Specified part number was PIC32MX150F128B-50I/SP for the DIL. Smoke makes things work. When the smoke gets out, it stops! |
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| MOBI Guru Joined: 02/12/2012 Location: AustraliaPosts: 819 |
A bug?? None of my chips (6 off) will read analogue on pin3. Analogue works quite happily on all other pins designated. The data sheet for the series says pin 3 is AN1??? Should work?? David M. |
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| atmega8 Guru Joined: 19/11/2013 Location: GermanyPosts: 722 |
I will blink a LED and let the PIC in running state. I' ll be back in xx hours... |
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MicroBlocks Guru Joined: 12/05/2012 Location: ThailandPosts: 2209 |
That would only matter if you want to run the uMite at 48Mhz. The ones without the "50" run maximum at 40Mhz. When starting a uMite it will run at 40Mhz, you have to change the speed with a command to get the 48Mhz. Microblocks. Build with logic. |
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| Page 18 of 26 |
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