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Forum Index : Microcontroller and PC projects : New Maximite MMBasic Version - V2.7
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Gizmo Admin Group  Joined: 05/06/2004 Location: AustraliaPosts: 5078 |
Yeah it is good. I might add a link to it from my Maximite page too if thats OK. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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sparkey Senior Member  Joined: 15/06/2011 Location: AustraliaPosts: 819 |
couple of things i would like to note ::if you reflash the firm i noticed that u lose all programs that were stored in aA: drive not shure if any body has noticed this or if its just a mistake on my behalf.... ::when using the files to list programes in A: the memory is displayed more like a dos mode ..thats to say how much memory is left in A: and does not display individiaul file memory as the sd card was reporting each file size... so be shure to back up any files to your sd card before a firm flash also i dont see any direct copy command for copying files fom A: to B: and visa versa although it can be done by firsty by logging onto B: and loading the program you want to use ...then switch to A: and save it to A: then it will be stored in A: ..... ::: regards sparkey... technicians do it with least resistance |
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Geoffg Guru  Joined: 06/06/2011 Location: AustraliaPosts: 3194 |
This was a deliberate design decision, I needed a bullet proof way to clear all the internal flash in case it got corrupted. It does mean that you need to copy files off A: before you upgrade. What we need now is a short BASIC program to copy files from drive to drive. On another subject; the XModem protocol does not seem to work correctly with Hyperterminal. I don't know where the fault is (MMBasic or Hyperterminal) but until I can find a fix the alternative is to use Terra Term which does work. Geoff Geoff Graham - http://geoffg.net |
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crackerjack Senior Member Joined: 11/07/2011 Location: AustraliaPosts: 164 |
I'm glad the Quick Reference card is useful. As I stated to Tsvetan of Olimex before, go nuts and post it wherever you like. There have been so many people giving so much to this common interest of ours, that any small amount I can put back I am happy to do. Cheers. |
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| Keith W. Senior Member Joined: 09/10/2011 Location: AustraliaPosts: 118 |
Hi, For those who do not have a November Silicon Chip yet. I rushed off to my local Jaycar shop yesterday morning, they usually have copies early.They told me that they had arrived the day before. Ringwood Victoria. Best of luck, Keith W. |
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| sparkey Senior Member Joined: 15/06/2011 Location: AustraliaPosts: 819 |
in retospect the reason the flashe drive may have been  made so large i think thati recall somebody mentioning that they had seen a basic file size of aprox 50 k given this in mind the ram coud store up to five lage files just my opp ....regards sparkey...technicians do it with least resistance |
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donmck Guru Joined: 09/06/2011 Location: AustraliaPosts: 1313 |
I can see $10 for the PCB in the mag, but can't find the PIC32, so I guess it is now down to $35 for the two items posted. Cheers Don... https://www.dontronics.com |
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| sparkey Senior Member Joined: 15/06/2011 Location: AustraliaPosts: 819 |
is it possable to data log constatly to the flash drive .... technicians do it with least resistance |
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| Geoffg Guru Joined: 06/06/2011 Location: AustraliaPosts: 3194 |
Yes, the magazine article goes into the details. Geoff Graham - http://geoffg.net |
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| sparkey Senior Member Joined: 15/06/2011 Location: AustraliaPosts: 819 |
that was under the section "flash endurance" i see it now i did not read that properly sorry feel like i must ask the ovbious with out the thing bitting my tounge.... so it can store data in the ram then write it to flash am i getting this correct... thanks geoff regards sparkey... also i would like to add that if u use the bread board kit from "hamfield" but dont use the origal bread board ...and put a double lenth bread board on it you will prolly find that this may be fine ...for the minimaxi as the protoboard has a 3point3 volt reg out put on it as well as 5volt reg just use some extra rubber feet to support the extra lenth required..... on a nother point "drive A" may become a place that could possibly hold drivers for such things as printers ..another reason for the 256K size just a theroy..... technicians do it with least resistance |
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| sparkey Senior Member Joined: 15/06/2011 Location: AustraliaPosts: 819 |
ok heres is how its done to save a file from "B:" to "A:" log onto drive B where your files are load your file into ram "eg" load "set.bas" enter list the file so you know its loaded into ram ....type "cls" next step... syntax :::... save "a:set.bas" enter change to drive A type files ..you should now see the file "set. bas" type "new" type list ..hopefully there is no list to be seen ... type load "set.bas" type list... you should have the program listed on the screen in front of you ::: run ::: hopefully if all is well you can now run straight of the flash drive for that program... ::::::::::::::::::::::::::::::::::::::: set.bas is an example filename this seems to be the simplest way i can explain it correctly after you get the hang of this you can omit certain steps i just thought that if i sat here and did it this way it would benifit the newbies no punn i was one too.... technicians do it with least resistance |
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| mookster1 Regular Member  Joined: 10/06/2011 Location: New ZealandPosts: 81 |
+1 on the reference card  Capacitance is futile - roll on 2012! |
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| ajkw Senior Member Joined: 29/06/2011 Location: AustraliaPosts: 290 |
Sparkey, Your copy method will certainly work. I ran into a problem last night when trying to copy a Font file over. The program here will copy them .fnt, .bas and any other text based file also. Just run the program whenever you need to copy something. I called it COPY.BAS of course. Regards, Anthony. 5 ' file copy for Maximite Basic by AJKW 10 CLS 15 PRINT "Copy file from current B: directory to A:" 16 PRINT "Can only be text .fnt or .bas file type" 17 PRINT 20 INPUT "file name >";fn$ 25 SETTICK 10000,1000 '10sec time out if something goes wrong 30 OPEN fn$ FOR input AS #1 40 outfn$ = "A:"+fn$ 50 OPEN outfn$ FOR output AS #2 55 DO 60 LINE INPUT #1,inp$ 70 PRINT #2,inp$ 80 LOOP UNTIL EOF(1) 200 CLOSE #2 210 CLOSE #1 220 END 1000 SOUND 1000,1000 1010 END |
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| sparkey Senior Member Joined: 15/06/2011 Location: AustraliaPosts: 819 |
cheers anthony i had mentioned earlier on in the peice that there should be a copy cmd that ties in with the firm i have not tried your copy program as have not had time...thanks also for the reply that my method will work as i have tried it and the trouble with a straight copy is that if you just try to copy a file over it does not see the code but will copy the file name as i wrote eailer then i thought i had it but the file was empty so i posted what i found to work ....sparkey///.../// technicians do it with least resistance |
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| sparkey Senior Member Joined: 15/06/2011 Location: AustraliaPosts: 819 |
geoff i dont have any thing bad to say about the "mini" as i think after a couple of days since release ..its going to be a great advantage for those wantin to run it on a bread board as well great project for the young ones at school etc...well i never thought that you were going to bring out an "EV" as it is ...but its going to be great if altronics are going to offer this board as well ..with the chip already mounted ....regards sparkey ... technicians do it with least resistance |
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| ajkw Senior Member Joined: 29/06/2011 Location: AustraliaPosts: 290 |
Hi, I have changed lines 60 and 70 in the following code and now I can transfer files such as jpgs and bmp's. Only one little problem... On writing to Drive A the Maxitmite drops 4 bytes at about 4Kb's into a file. (between 4032 and 4132 I found during testing.) I note also that there is a 4Kb overhead to a file saved on the A drive (i.e. a single byte file takes 4Kb from the available space)... a coincidence or not that these numbers are in the same ballpark?? Cheers, Anthony. 5 ' file copy for Maximite Basic by AJKW 10 CLS 15 PRINT "Copy file from current B: directory to A:" 16 PRINT "Can only be text .fnt or .bas file type" 17 PRINT 20 INPUT "file name >";fn$ 25 SETTICK 10000,1000 '10sec time out if something goes wrong 30 OPEN fn$ FOR input AS #1 40 outfn$ = "A:"+fn$ 50 OPEN outfn$ FOR output AS #2 55 DO 60 inp$ = INPUT$(1, #1) 70 PRINT #2,inp$; 80 LOOP UNTIL EOF(1) 200 CLOSE #2 210 CLOSE #1 220 END 1000 SOUND 1000,1000 1010 END |
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| Olimex Senior Member Joined: 02/10/2011 Location: BulgariaPosts: 226 |
just be very careful with the flash write on the intern disk as PIC32 specs says in worst case only 1000 erase cycles are allowed, this means if you by mistake write 1000 files or log info which often open/write to file you can wear intern PIC32 flash in seconds. my understanding is that Geoff add this intern disk to unleash single chip embedded applications like to have your BASIC code inside your PIC without need to use SD card and to not change often the inter DISK image if you decide to use this DISK A as regular SD card you will wear the PIC32 flash pretty soon |
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| Geoffg Guru Joined: 06/06/2011 Location: AustraliaPosts: 3194 |
No Tsvetan, that is not right. This was my response to Don in another thread (he was quoting you): Geoff Graham - http://geoffg.net |
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vasi Guru Joined: 23/03/2007 Location: RomaniaPosts: 1697 |
And this mean I will never wear out a PIC32 using StickOS? What if I have entire zone of simulated disk on Flash, full? It will count down the cycles? Lets suppose I have some free space between last location of MMBasic firmware and the rezerved zone of Flash disk. It will never count down the cycles and I can use the entire zone of Flash disk? What is the endurance of a single flash cell? Can I look at it as to an EEPROM cell? Vasi Hobbit name: Togo Toadfoot of Frogmorton Elvish name: Mablung Miriel Beyound Arduino Lang |
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| Olimex Senior Member Joined: 02/10/2011 Location: BulgariaPosts: 226 |
the Flash used for Solid Store Devices endurance vary from 100 000 to 1 000 000 write / erase cycles and they are Gigabytes in size, on top of this is OS with lot of cache, which carry so you really phisically write to the Flash rare and can't do something stupid, while Maximite is development board and peoples are free to do silly things while they write code if I remember correctly the PIC32 flash sectors were x 4KB i.e. 256KB disk will have 64 sectors, with 1000 erase cycles this gives me opportunity to write 64 000 times to disk sector safely even if the write / erase cycles are perfectly distributed. what if I have bug in my code and run cycle to write 4K of data 64 000 times, I bet such code will be executed pretty fast and I will wear all my memory at the 1000 times limit in matter of seconds. |
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