Rapid Prototyping with 16/32 bits MCU

malife

I forgot to add that the only thing I did to compile was to double click the configuration block, then adding the errata and large data model flags to the compiler options. After that it compiled with no issue

malife

Dan, I confirm the version you uploaded compiles without a problem in my setup. This really narrows it to either your setup (compiler/Matlab version/ dsPIC Blockset version) or OS version. I am really sorry you are going through this but neither Lubin nor I have been able to reproduce it and, as you...

malife

Hello, Sorry for the long silence. I was out of town. I agree completely with Lubin. lseek() and write () are NOT used at all neither by Simulink (on a 2007A Windows XP configuration) nor by the custom C code I wrote for the low-level drivers. I think this is something completely different. It could...

malife

I've looked at both and actually tested but of them and I have to say Lubin's is much better than Microchip's. For instance the C function call that they implement you can only pass scalars (i.e. no vectors) which is essentially useless. Also all of their blocks are polled-based instead of interrupt...

malife

Hello Magic, After reading the posts it is hard for me to see if the QEI is not working or if the serial is not sending the data. Can you confirm with a scope that when you are moving the motor you actually get a train of pulses from your encoder? Because since I had the code working and Ender modif...

malife

Hello Lubin,
This seems to be quite an interesting comparison, would you post your results if/when you have them to see which is more efficient?

Thanks

malife

Hello All, From what I read seems that your SPI is an error mode. If you get an overwrite error, your dsPIC will continue working normally but your SPI engine will freeze until you aknowledge the error and clear the error flag. It is a good idea enable the SPI error interrupt and handle the interrup...

malife

Hello Lubin,
Thanks for such a quick response. This solution works like a charm.

Thanks!

malife

Hello Lubin I have several "init" C- function blocks that I need to execute at a specified order upon booting the dsPIC, if I use the Block ordering option only the last block in the sequence order gets included. Right now I guess I can work around this by doing just one C-block that calls all in th...

malife

Hello Salemimoh, I am not familiar with the Fuzzy logic toolbox (blockset?) in Matlab so I can not help you there. But I have previously encountered similar stack overflow problems, and as I mentioned in previous post, making the arrays and variables static (or persistent in matlab) did solve the pr...

malife

Sure,
Just post more details because this is quite vague. Post your model, or what you are trying to accomplish and which dsPIC you are using.

Mariano

malife

Can you post a bit more about what you are doing (application wise) and which dsPIC you are using? Not really sure what is wrong. Evidently PC is getting lost for some reason.

malife

Thanks Lubin,
Yes, that is correct. Glad it worked

Cheers
Mariano

malife

If you are stepping through see in which instruction it fails. This might help us to help you. Also, try compiling the model with a "far" memory model. See the C30 Documentation. Also it might just be that the chip you are trying to use does not have enough RAM to perform whatever it is you are tryi...

malife

Hello All, This problem, which really is not a problem but a compiler feature is related with near and far code (data and code) take a look at the C30 compiler documentation so you can set the flags accordingly in the compiler settings in matlab. I've been through this error before. Regarding the lo...

malife

Hello Giulio, It seems like your problem is a bit more related to design rather than the blockset itself. If you need to read more than one QEI channel, than there is not much you can do with a dsPIC. You can try using the input capture, but be aware that you have to write your own logic to determin...

malife

Hello Lubin, Just wanted to follow up on the Muxes issue. I can positively confirm that Muxes do not work with the code translation. I don't know if it is the matlab version, the blockset version or some of the code simplification settings. But to work around this what I do is for every mux I use in...

malife

Hello Lubin, This another bug that has been killing me all day and have not found a work-around. I have three separate signals that come from different sources and have different widths. They are joined by a mux and then passed on to a C-Function call. The problem is that the signal is overall 46 by...

malife

Yes I second that. ECAN Please

!!

malife

Hello Lubin, I would also add to Bernard's post on the ADC the following bug: I have AN channels 0-16 except for AN2 which is SPI1 SSL in 33FJ256MC710. So in the AN dialog box I have: [0 1 3 4 5 6 7 8 9 10 11 12 13 15 16] Just for the sake of completeness I have a digital output block set with infin...

malife

Hello Lubin, I am currently working on 0.98d so maybe you already fixed that in the latest version (which I hope you'll send it to me when you get back from vacations :-) ) But the issue is the following. I have a matlab script that initializes different variables most of it related to sizes and loc...

malife

I finally solved this issue. It turns out that malloc and memcpy use sbrk which for some reason it is not compiled into the coff. Anyways, I found in the periphereal library documentation that microchip provides the source for sbrk with the standard C30 instalation, so I just added the source to the...

malife

Hello Lubin, I've spent much of the day today trying to debug this error with no luck: C:\PROGRA~1\MICROC~1\MPLABC~1\lib\libc-coff.a(xgetmem.o)(.libc+0x4):/home/guymc/build/3.10/build_20080424/src/standardc/sxl/xgetmem.c: undefined reference to `sbrk' C:\Program Files\Microchip\MPLAB C30\bin\bin/pic...

malife

Thanks Lubin! I will try this and report back. I am planning on writing the GPS reader/decoder in a C function. Once I have it ready I will post it as an example and see if I can get any feedback from you or anybody else in the forum.

Thanks!

malife

Hello Lubin, I hope you are enjoying your vacation :-). Thanks so much for your quick response. This example will help a lot thanks! And will solve another question I had. But going back to my original question (and feature request) which is reletad to the RX block and not the TX block as you showed...

malife

Hello Lubin, I understand that the RX circular buffer size can be set from the UART configuration block, but is there a way to configure the UART Rx block to send out more than one byte? For instance, I don't know if it is possible but I would like to have a buffer of say 256 bytes and have the RX B...

malife

Hello Lubin, I am trying to use the 12-bit ADC block in the 33FJ256MC710, I drop the block and select channels 0-7 and I get the following error when I compile: SPIMasterNoDMA.c:167: error: 'ADC1BUF1' undeclared (first use in this function) SPIMasterNoDMA.c:167: error: (Each undeclared identifier is...

malife

Hello Lubin, Thanks for your quick response. I will include that in my compiler. As for the conditions, I guess I can look at the generated source via simulink's HTML report. Just one question then: All the initialization of the periphereals (unless I explcitly say it changes, like the SPI option) h...

malife

Hello Lubin, First of all As you have probably guessed by now I am currently working with the 33FJ256MC710 and they recently (April 18) came out with an errata plagued with problems in the ADC, UART, SPI, PWM, OC and DMA. Too late for me to change the chip :evil: . Now,almost all of those peripheral...

malife

Hey Lubin,
I think it would be a good idea to provide a way to include examples and user-made tutorials. Never worked myself in a wiki before, but if you decide that a wiki is the way to go, then I will be happy to include examples of what I made and maybe some quick tutorials

malife

Yes, that took care of it. I confirm the work around solves the problem.

Thanks for excellent support!

Mariano

malife

Thanks for a very quick response. I will try what you suggest and report back.

If it does not work I will wait for the next version.

DMA SPI si comming along, hope to give positive reports soon

Thanks!

malife

Hello Lubin, I am trying to pass a vector to the C-Function Call block but apparently it is only getting the first element in that vector: You can see in the image shown below I assemble a vector using a Mux, and then pass it to the C function call, but the call to the function call is this: * S-Fun...

malife

Masaki, The only thing that I noticed from your code is that WriteHistory is called every three seconds, which seems kind a long considering your main sample rate is 0.001, but this by no means implies it is wrong. Also, you did not post the H-files, but in your function declarations (i.e. you C fil...

malife

Hey Lubin, You had me worried for a while, 'cause my board had already been sent to manufacture and I had only PGC2/PGD2 wired :shock: . Anyways, I found in the dsPIC33F family reference manual Section 24.2.1 that you can use any pin pair to program the device (you can not mix and match i.e. PGC1/PG...

malife

Hello Masaki, It's kind of hard to help you without seeing the overall model and the C-source. I understand if you can not post your model, so I will do my best to help you out from what I see. First, if you are using the C-function call block in your model, then your functions should have the follo...

malife

Thanks for posting that information Masaki. I am sure many will find it useful. I could not make in-line C program work correctly from some unknow reason. When you say that you were not able to get the in-line C program to work, do you mean the C function call inside the Simulink Model. If so, I wou...

malife

Hello Martin, In case you've gotten ECAN to work using C function calls would you mind posting about your results and maybe your model/code? In that way we can all take advantage of what is being done while Lubin catches up :-). You can read about the QEI (http://www.kerhuel.eu/forum/viewtopic.php?f...

malife

Hello All, So your general advise is to use inline parameters always? or just for this application? Also, I noticed that Masaki's model was not posted, could we at least know what dsPIC is being used and at what sampling frequency and Fcy, just to have an upper bound in case someone else is using th...

malife

Hello Lubin, That sounds great! I have two dsPICs in a UAV autopilot, one is the sensor MCU and the other is the control, both will exchange information between them using SPI clocked as fast as I can get it to work. One is the master and the other is the slave (obviously :-) ). I am planning on usi...

malife

Ok Lubin,
I will do that. One question... do you know if it will program regardless of which PGC/PGD I connect to?

Thanks for the response

malife

Hello Lubin, I have the following request: Many of the high-end dsPics have more than one PGC/PGD ports and these are used to program and debug. The selection of which to use is set using configuration register FICD (like crystal, PBOR, etc...) but your Master block does not have that option. I woul...

malife

Hello Laura, If you read the tutorials at http://www.kerhuel.eu/RTWdsPIC/examples/index.html that should get you started. Regarding the manual, every block is documented and you can read it off the website or in Matlab's Help once you install the blockset

Hope this Helps

Mariano

malife

It turns out I found the problem. Actually there were 2 problems. I hope Lubin has a clear explanation for the first one: 1.- H File: The H file SHOULD NOT go in the Simulation->Config Parameters dialog. You just need to include it in your C file. No clue why. 2.- DEE.C and DEE.S both created a DEE....

malife

Hello Lubin, I am trying to implement the software emulation EEPROM as described in Microchip's App Note AN1095 http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1824&appnote=en530593 . This is what I am doing: I downloaded the code and renamed the C, S and H files to DEE.c, DEE...

malife

Thanks Lubin for pointing that out. If I use this small chip (the 28-pin one) most likely I will not be needing ECAN (or CAN) but rather just serial, SPI, ADC, etc... So at least on my side I have no particular hurry for ECAN device support. For the 710 (the big one) CAN(ECAN) willl be a feature tha...

malife

Hello Lubin, I will not be using them immediately. Right now I am using the 33F256MC710 which is on the opposite side of the scale (their biggest chip) and is fully supported by your blockset, but certainly as soon as you support these new parts I will start using them for a side project I am workin...

malife

Hello Lubin, Microchip has recently started sampling the DSPIC33FJ64MC802 and the DSPIC33FJ128MC802, to become their smallest chips with DMA available (28 pins) and they are conveniently available in PDIP package which makes them easy to prototype. Would you be so kind to have those chips available ...

malife

Great Example Lubin. Thanks for the tip on the ct_turns variable. I find that more elegant than declaring a "ghost" variable from the code since in my example directly from the Simulink Model you can't really see that there is a global variable. Anyways, between the two examples it should be now mor...

malife

go to MPLAB Menu Configure->Select Device and make sure you have the correct device. That should take care of it.

Hope this helps

Mariano

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