Matrix user forums

Hello Medelec, I had a similar problem lately: see http://www.matrixmultimedia.com/mmforums/viewtopic.php?f=29&t=6968#p16515 It turned out to be a delay problem: 2 macro's using the same delay routine simultaniously. The solution from Steve ( replacing the delay by a loop ) solved the issue. Maybe t...

Hello, I want to create a datalogger on MMC card. The idea is that every time the logger is restarted or reset, a new logfile is created in the root directory. The attached program is a simplified version of the final program just to demonstrate my problem. It creates 5 logliles ( LOG1.TXT, LOG2.TXT...

Steve,

Editing the C code, as you suggested, did the job.
Thx,

Eric

Sorry Steve, but I think you don't understand my point. This program is very short, has no delays at all and has 2 very short interrupts. The first interrupt is a RB1 interrupt which reacts on a keypress. Once triggered, it only looks for the keyvalue. The second interrupt just sets a flag when the ...

Hello Steve,

The length of my 2 interrupt routines are very short. They just set a flag. It is in fact the same routine as shown in the example.
I have the feeling that Medelec is right with his comment. Can you confirm that I can safely ignore this warning?

Regards,

Eric

Hi team, I received this strange error during compilation of my program. snap0372.jpg I stripped down the program until I was able to pinpoint the error exactly ( see attachement ) The program uses 2 interrupts: one TMRO interrupt and one RB1 interrupt. This worked fine until I added the LCD_Start m...

Hi Ben,

I was looking at your example and I noticed that in the panel this message was given:
I wasn't aware that Flowcode doesn't look at the owner of Flowcode but at the author of the program.
Am I in violation of piracy rules now

Rgds,

Eric

Good idea, I will give it a try.
Rgds
Eric

Ok, thx. Something that still puzzles me is the behaviour of the watchdog in a deliberate end loop. Suppose you have somewhere in your program an error routine like this (just an example): snap0251.jpg The intention of this code is to stop the program from continuing in case of a critical error. How...

Sorry Ben, I posted in the wrong index. Can you please change it to the V4 group?

Thx,

Eric

Hi Ben, In the project options of V4 it is possible to mark "auto clear watchdog". Does this means that Flowcode enters at regular places in the code the function "clear watchdog"? I noticed that when I set the config bytes of the processor to "enable watchdog" and when I set the marker "auto clear"...

Hi Medelec,

Even simpler
Shame on me, I definitively was looking way to far for a solution.

Rgds,
Eric

Perfect in its simplicity.

Thx Ben,

Eric

Hello, Does anybody knows a good algoritm to simulate in Flowcode the C- function "floor" and "ceiling" to establish roundings on an integer. What I mean is this: reading an ADC value of 834 ( representing a temperature of 83.4Β°C ), I want to round it to 830 ( giving a rounded temperature of 83Β°C)...

Thanks guys, this helps a lot.

Regards,

Eric

That was my first idea too, but the variable is effectively type INT.
I also need to say that it simulates well in Flowcode ( it simulates 1 sec ), but in real hardware it doesn't work correct.
Maybe somebody can try it on his hardware to verify this.

Rgds,

Eric

Hello Is it possible to create a delay in V4 using variables? Consider this testprogram: snap0210.jpg I need a delay with a value depending on certain conditions. So I attributed the variable "delay" with the value 1000 ms. In the delay icon I use this variable to generate my delay. The problem I ha...

Hi Ben,

I don't mind at all.
I am glad to hear that you like the program.

Regards,

Eric

George,

I haven't tested it on PIC16F877 but I see no reason why not.
I use a crystal of 8 Mhz

Regards,

Eric

Please remember: the program will not simulate because there is no one-wire simulation in Flowcode. You need at least 1 real sensor DS18S20 or DS18B20 connected to port A0. You will see something like this on real hardware : 8 sensors ( 5 DS18S20 and 3 DS18B20 ) and display_res of 3 digits : snap020...

Hello, I am succesfully using the one-wire protocol of Flowcode V4 in a central heating controller. My one-wire bus is 18 meters long and has 6 sensors DS18B20 attached to it. It took me considerable study and effort to make it work reliable. But it is perfectly possible to use the protocol of V4. H...

Hi Mikat,

Sorry, my mistake: read "busreset -scanbus and getIDByte" as "busreset -scanbus and getDeviceCount"

Hello Mikat, It is true that a DS18S20 has a conversion time of 750msec. This means that if you have 3 sensors online and you let each sensor make a temperature conversion separately, the total time will be 3 x 750 msec. However, it is not necessary to give each sensor a separate command to start th...

Ok, I will keep an eye on it.

Hi Steve,

Perfect.
But what do I have to do to prevent it from happening again in the future?
I don't use 2 monitors and I didn't changed my resolution. In fact I am simply working on a notebook.

Anyway, thanks a lot.

Eric