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Forum Index : Microcontroller and PC projects : MicroMite Beta 17
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TassyJim Guru  Joined: 07/08/2011 Location: AustraliaPosts: 6102 |
Geoff, I think you were away camping when we found the FUNCTION problem. Subs and Functions cannot be declared on the first line of a program. Remove the first line of this code (the comment) and it will give an error "Unknown command". Put the Function declaration on the first line and you will also get an error. '
sub test x y = x*x end sub function square(x) square = x*x end function print square(3) test 3 print y I am not sure if there are any other first line problems. VK7JH MMedit MMBasic Help |
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Geoffg Guru Joined: 06/06/2011 Location: AustraliaPosts: 3196 |
Aahh, not good. Thanks, I will dig into it. Geoff Geoff Graham - http://geoffg.net |
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| Geoffg Guru Joined: 06/06/2011 Location: AustraliaPosts: 3196 |
Thanks everyone, I have found the bug and fixed it in Beta 18 which on its way now. Please let me know if you find anything else as I do need to close the beta program in the next few days. Thanks again for everyone's help, Geoff Geoff Graham - http://geoffg.net |
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OA47 Guru Joined: 11/04/2012 Location: AustraliaPosts: 926 |
Geoff, do you get any sleep? |
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| Geoffg Guru Joined: 06/06/2011 Location: AustraliaPosts: 3196 |
Yes, but I have been spending far too much time on this. It is now coming up to five months!! Geoff Graham - http://geoffg.net |
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| viscomjim Guru Joined: 08/01/2014 Location: United StatesPosts: 925 |
But you've created something big!!! |
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| OA47 Guru Joined: 11/04/2012 Location: AustraliaPosts: 926 |
And I guess I am not the only one who is very grateful  |
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| Keith W. Senior Member  Joined: 09/10/2011 Location: AustraliaPosts: 118 |
Geoff, Thank you for the fantastic effort. I am very sorry to be suggesting additions so late in your efforts to settle development before release and had thought to not do so until after release. But I now think that due to difficulties for those without a PicKit-3 to update it should be considered now. Although you have now included in the Manual the possible need for a hardware start up delay. A possible alternate solution that would satisfy all users is to add something like: - Option Start nbr. Where nbr would be milliseconds delay possibly added to the minimal delay within the current MicroMite. This method would satisfy uses requiring no delay and those for whom it would be useful. Such an approach would enable all to use the simple application circuit detailed on page 8 of the Manual and turn what is now an inconvenience into a feature. Those who are supplying development boards without a hardware delay will be certain that their products will present a clean start in all circumstances. Is there room to add this feature? This possible solution has only just firmed in my conscience. Keith W. |
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| Geoffg Guru Joined: 06/06/2011 Location: AustraliaPosts: 3196 |
That sounds like a good idea Keith but it will have to wait for the next release after 4.5 (final). It is too close to the release date for me to risk adding more functionality. This is because most bugs are caused by adding a new feature which results an unexpected side effect somewhere else. Geoff Geoff Graham - http://geoffg.net |
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| WhiteWizzard Guru Joined: 05/04/2013 Location: United KingdomPosts: 2817 |
I now also support Keith's idea for a 'start up delay' option - and a great suggestion too as to how to implement this feature. 
However as Geoff says, there must be absolutely zero additional risk to his software now that it is about to be launched to the public. We should therefore accept that we will have to wait for this feature to be implemented in a future release; thats assuming Geoff is ok to implement it! I am about to launch a website dedicated to the MicroMite and have considered adding a page for people to add their own suggestions/ideas/'demands'/etc for the MicroMite. Then all these 'recommendations' will be in one place for us all to refer to, comment against, and possibly vote for. Please feedback your thoughts as to if you think this is a good idea or not to help me consider if such a page is worth implementing . . . For everything Micromite visit micromite.org Direct Email: whitewizzard@micromite.o |
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Lou Senior Member Joined: 01/02/2014 Location: United StatesPosts: 229 |
Keith, Geoff, Wiz, Wouldn't a simple 'pause xxxx' as the first line in the code work for a startup delay ?? Lou Microcontrollers - the other white meat |
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| Keith W. Senior Member Joined: 09/10/2011 Location: AustraliaPosts: 118 |
Hi Lou, A delay after the MicroMite starts executing program code is too late. The symptom is that the MicroMites startup greeting is corrupted on the PC/Terminal due to the Console port communication hardware not being ready quickly enough at power-up; otherwise the MicroMite starts OK. The problem to be overcome may only be cosmetic. My concern is that it will cause concern particularly to a new user who does not realize what is happening and who may gain the impression that all is not well. 
A corrupted greeting does not look professional. Keith W. |
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| Lou Senior Member Joined: 01/02/2014 Location: United StatesPosts: 229 |
Keith, OK, I got it - you need it to delay even before the boot up message to the console. I was thinking delay before it started manipulating port lines, etc. Your 'Option Start nbr' would be perfect for all users. Lou Microcontrollers - the other white meat |
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| robert.rozee Guru Joined: 31/12/2012 Location: New ZealandPosts: 2350 |
capacitor/resistor on the reset pin will do the trick. really, if someone knows how to change an option setting to alter the startup delay, they will probably also be able to type in "watchdog 1" to see the startup message. i have a question for geoff: how far removed is the DISTANCE function from a general-purpose function that generates a start pulse then times the delay from the end of the start pulse to a second event happening? for instance: duration = ELAPSED (trigger, response, length, timeout) where trigger is a pin that is initially pulsed for length microseconds, response is a pin to monitored for a state change after the trigger pulse ends, timeout is a maximum time (in microseconds) after which duration is returned as -1. if timeout is not exceeded, then duration returns a value in microseconds. i'm thinking of this as something that may be very useful in the next version of micromite basic. one thing that is currently lacking is the ability to easily do microsecond level timing of events. at the moment, the closest is using an external gate on the RTC's 32kHz signal fed into a counting pin. but that is complicated (plus also requires the RTC to be there). rob :-) |
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| Geoffg Guru Joined: 06/06/2011 Location: AustraliaPosts: 3196 |
Another way of high speed timing is to generate a high speed signal using PWM and gate that into a counting input using a NAND gate or similar. But I agree, it would be much better is there was an elegant solution in firmware. The trouble is that MMBasic is not suited to high speed work and secondly I have not come up with a succinct specification for what is needed to cover most requirements. But, anyway, it will have to wait for later (as you acknowledged). Geoff Geoff Graham - http://geoffg.net |
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| OA47 Guru Joined: 11/04/2012 Location: AustraliaPosts: 926 |
Just to prove that there isn't a bug can someone try the DS18B20() function with clock speeds of 5 and 10 Mhz (cpu 5 or cpu 10).My program seems to freeze at these clock freqs and it may be something else that is causing it. Thanks in advance. |
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| WhiteWizzard Guru Joined: 05/04/2013 Location: United KingdomPosts: 2817 |
I am about to go out for the day. If nobody else has done this in the next 24hrs then I will do this test then. Which PIC are you using exactly? Can ANYBODY else do this test please ? . . . . For everything Micromite visit micromite.org Direct Email: whitewizzard@micromite.o |
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| OA47 Guru Joined: 11/04/2012 Location: AustraliaPosts: 926 |
I am using the 28 pin PICs |
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| Keith W. Senior Member Joined: 09/10/2011 Location: AustraliaPosts: 118 |
I can confirm that at 5 and 10 MHz the program freezes, waiting I guess for an answer from the DS18B20. OK at 20 MHz. Using a 28 pin MX150F128B with version Beta 18 Keith W. |
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| WhiteWizzard Guru Joined: 05/04/2013 Location: United KingdomPosts: 2817 |
Keith, Graeme: Are you using the 40MHz or 50MHz versions of the 28pin PICs?? Graeme: The 150 or 250?? Thanks . . . PS: I will look at this on analyser when I get home to see if I can work out what is happening. For everything Micromite visit micromite.org Direct Email: whitewizzard@micromite.o |
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