 Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me. |
Forum Index : Microcontroller and PC projects : New Maximite MMBasic Version - V2.7
  Page 3 of 3 |
|||||
| Author | Message | ||||
vasi Guru  Joined: 23/03/2007 Location: RomaniaPosts: 1697 |
The "writing to flash memory" feature was requested by Microchip in exchange of providing preprogrammed microcontrollers? That so much lower number of erase/write cycles for PIC32 was with a scope and an Interpreter which don't write in flash override that scope. Vasi Hobbit name: Togo Toadfoot of Frogmorton Elvish name: Mablung Miriel Beyound Arduino Lang |
||||
Geoffg Guru Joined: 06/06/2011 Location: AustraliaPosts: 3194 |
That does not sound good, I tested large files and they worked OK. I will investigate and report back. Yes, file allocation is done in 4K chunks. That is because you must erase the flash in 4K chunks. As a side effect that means that the maximum number of files in drive A: is 64 assuming each is less than 4K in size. Geoff Geoff Graham - http://geoffg.net |
||||
sparkey Senior Member  Joined: 15/06/2011 Location: AustraliaPosts: 819 |
geoff i found that XMODEM will work with hyper-term its just that u have only a short time to enter the command then do all the tasks requierd to transfer a file using hyperterminal could the recive count be longer...regards sparkey.../// technicians do it with least resistance |
||||
| mookster1 Regular Member  Joined: 10/06/2011 Location: New ZealandPosts: 81 |
Just a question: does the ~1000 reads/writes apply to just write operations, or do read operations contribute to flash wear as well? Capacitance is futile - roll on 2012! |
||||
| vasi Guru Joined: 23/03/2007 Location: RomaniaPosts: 1697 |
Normally, unlimited reads. Hobbit name: Togo Toadfoot of Frogmorton Elvish name: Mablung Miriel Beyound Arduino Lang |
||||
VK6MRG Guru Joined: 08/06/2011 Location: AustraliaPosts: 347 |
Not sure if this is a problem? Or I've missed the info about it, but when saving to A: drive on the Maximite the screen flashes and goes funny for a second and comes back again as if nothing happened. 
Its easier to ask forgiveness than to seek permission! ............VK6MRG.............VK3MGR............ |
||||
| VK6MRG Guru Joined: 08/06/2011 Location: AustraliaPosts: 347 |
Also noticing the screen is a bit noisy. Like what was happening back with Ver 2.4 I think it was. Anyone else seeing this? Its easier to ask forgiveness than to seek permission! ............VK6MRG.............VK3MGR............ |
||||
| aargee Senior Member Joined: 21/08/2008 Location: AustraliaPosts: 255 |
Geoff mentions in the notes that the video will flicker when accessing the internal flash ram. All of mine do it on 2.7. As far as noisy video, there does seem to be a bit more flicker on the whites... For crying out loud, all I wanted to do was flash this blasted LED. |
||||
| sparkey Senior Member Joined: 15/06/2011 Location: AustraliaPosts: 819 |
the screen actully shuts the video off as it writes to the flash drive ...as for you wavy if your using the comp out up date to the latest firm i done this and it was screen output steady as a rock it was fine have not noticed anythig funny on the vga though ..and i`m still having trouble with the rtc if you could help i would be most greatfull "line 446 as usual other than that it returns a zero on the chec test ...so maybe the chip is buggerd i dunno...regards sparkey... technicians do it with least resistance |
||||
| VK6MRG Guru Joined: 08/06/2011 Location: AustraliaPosts: 347 |
Thanks for that, I'd thought I'd bumped something, a loose VGA plug. But know that I know that it's no big deal, it's all good. A shame about the screen flicker. Its easier to ask forgiveness than to seek permission! ............VK6MRG.............VK3MGR............ |
||||
| VK6MRG Guru Joined: 08/06/2011 Location: AustraliaPosts: 347 |
Sparkey, you need to read every post in here.<*> It took me a bit to find it, but once I did find the issue it was very satisfying to get it working. There is some lines of code in both of the read.bas and write.bas files and you need to add a few lines and change a few. Like I said, read all the posts and by page 2 or 3 you will have your answer. The files should be added to the forum again with the changes included! I will try and upload them soon. Its easier to ask forgiveness than to seek permission! ............VK6MRG.............VK3MGR............ |
||||
| sparkey Senior Member Joined: 15/06/2011 Location: AustraliaPosts: 819 |
are u using a crt set and if you are try changing to another portable set if its a teac is always going to be like that sets of the similiuar manafacturaes ran pretty crappym ccts back then ..i used to be a tv repair man but now i`m just redundent who would even bother with a crt these days,,,...regards sparkey... technicians do it with least resistance |
||||
| VK6MRG Guru Joined: 08/06/2011 Location: AustraliaPosts: 347 |
Sparkey, have a look <<HERE>> This is how I've done the RTC. Also, I have a 17" NEC LCD screen for my Maximite. And I've always used the screen with the Maximite with no problems. (except for the flicker issue with VER 2.4 (I think) so I know it's not the screen!). Its easier to ask forgiveness than to seek permission! ............VK6MRG.............VK3MGR............ |
||||
| sparkey Senior Member Joined: 15/06/2011 Location: AustraliaPosts: 819 |
does your screen flicker with every maxi that you connect to it ....i have a 19 inch phillips runs only in 75 Hz max i dont know what freq it runs on the maxi but look out for an earthing problem might be the problem also if your monitor vga lead is detachable try another lead ...ive seen it happen ...regards sparkey.../// technicians do it with least resistance |
||||
| mookster1 Regular Member Joined: 10/06/2011 Location: New ZealandPosts: 81 |
I've always had noticeable screen flicker (when you look closely at pixels they tend to flicker a bit) but it really hasn't been a problem. It's more noticeable when you save to an SD card though. I've configured mine (it's from the Altronics kit) so I have a composite video output as well as VGA. However, I've yet to try version 2.7 but it definitely looks good! Capacitance is futile - roll on 2012! |
||||
| sparkey Senior Member Joined: 15/06/2011 Location: AustraliaPosts: 819 |
2.7 has been modded for compisite i have run it and as long as your not running a old cheap crt screen you should find you get a good picture.../// technicians do it with least resistance |
||||
| Page 3 of 3 |
|||||
 Print this page |
