Rapid Prototyping with 16/32 bits MCU

Hi Val, I hope this is a nice accident ! you will find example about Input Capture block on the example page : http://www.kerhuel.eu/wiki/Category:Example look at the autopilote model, I think it's using IC blocks. Also, have a look on the IC block help : http://www.kerhuel.eu/wiki/Block/Output_Comp...

Hi Jose Luis, I find the error ;-) You are using the internal RC oscillator of the dsPIC. (FRC for Fast RC oscillator). It is very difficult to make the UART works properly with such oscillaotr as it is not precise enough (to my experience). Even if the dsPIC is supposed to run at 30MIPS (7.5MHz RC ...

Hi Nigma,

Is there any news on the ongoing IMU project ?

Hi Ender,

There is a port mapping block to do it. It is not described on the wiki, but it is in the blockset anyway.

Lubin

Dear Girish, I will probably not be available for the next three day. Anyway, could you try to compile one of the example in the example repertory ? On your model, Check that you selected one microcontroller in the Master block configuration Then, if you still get in trouble, could you post your mod...

Dear Gabe, I did not see any obvious error in your model. You may add a blinking led to make sure the dsPIC is running anyway. I do not look at the specific chip you are using, and at the I2C parameters. I2C digital bus is really a pain to debug compared to its SPI equivalent. I am using I2C bus for...

Hi Laurent,

That is strange as I use the nop function and it seems to work.
Could you post the .mdl file please ?
Did you loocked in the generated C file ?

Perhaps the compiler optimisation configuration removes nop instruction ?

Hi Casparus, I will have a look on your filters soon. Input Capture block is quite similar to the Output Compare block. Despite I am using this block a lot (mostly to capture PWM duty cycle from remote control receiver) Ijust realize that there is no example using this block. You must configure insi...

Hi Tom,

You will also need Stateflow Coder : http://www.mathworks.fr/products/sfcoder/
For compiling the stateflow model, just place it in a simulink model, and compile the simulink model.
Have a look on the many examples (and video) http://www.kerhuel.eu/wiki/Category:Example

Lubin

Hi Casparus, You are making weird system. It is not very clear why you are using an ADC. What about using an Input Capture block to measure the period of your input signal? There may be a problem with the filters you design. You should post a model with a non working filter. It may help you to do si...

Hi Laurent,

The Nop Block must be placed between two others blocks, and connected on the ordering input/output of theses two blocks.

Post the simulink model if you have problems. Anyway, it is not adapted for 1s delay.

Lubin

Hello Florent, I worked on CAN more than one year ago. (Not ECAN yet !) I find the two models I used to develop the CAN blocks. These models were working last year. It was very funny to see on the oscilloscope two CAN trame sent by each dsPIC to cross over. When you see it, you'll find that CAN is a...

I uploaded the corrected version. Just try it (version 0.99d) and let me know...

Thanks again for this clear bug description with simulin example.It really helped to track it !

the bug is corrected and the corrected blockset version will be available in the next blockset version (following version 0.99c)

Lubin

Hi Jeorge, Is PIC32 likely to receive better coverage soon and leave the "experimental" status? As soon as you guys will use it in your projects, it will leave the experimental status. It is still experimental for me since I do not use theses chip in my projects yet. Not but reported yet, but is the...

If files are unpacked in the directory RTWdsPIC :

add to the matlab path directories :
- RTWdsPIC
- RTWdsPIC/blocks
- RTWdsPIC/dspic

dsPIC library should be seen in the simulink library with all others...

I'll try to release the new version soon. (few others bugs to correct before)
Lubin

Ok,

This bug should be corrected in the next version. Despite this error, the blockset should be properly installed on your system and should works.

Lubin

Hi laurent,
Thanks for sharing your experience.

Lubin

Hi Bernard, in *all* of the dsPIC33F header files Ok, I believe you, (did not open all of them). But I added the 128ms to all 33f dspic (will be available in the next version , current is 0.99c). I owe you a success story: while I was failing to write you a testimonial, we at add2 have put a product...

I corrected a bug similar to this one just before publishing the 0.99c version. I thought that this bug was not present yet in the 0.99b, but it may be the same. Anyway, could you test your model using the 0.99c version ? (Note that the 0.99c version on the website is depicted as 0.99b+ at the matla...

Which blockset version are you working with ? (0.99c ?)

Lubin

Hey, About chip select, are you checking the correct pin. It is B2 on the model presented here. You should try to disconnect the B2 pin from the temperature sensor pin. Check that its value changes with an scope. You may also check that both : - the dsPIC SPI clock - the output data (SDO) are changi...

Hi Magic, Thx for the Screen shoot. I am not sure that model was very well doccumented. However, you may find on the page : On the embedded simulink model, a mechanism allow to send data during a predefined time: The model embedded on the dsPIC send data only when the value variable60 is different f...

Hi Michael, As far as I remember, It is not possible to place two interrupt driven SPI block. Even it compilation is Ok, the behaviour will not be Ok. You will not get the requested results. It is difficult to imagine a solution with a possibility to have two SPI driven block. It may be possible on ...

Hi Jose Luis, You model has an original blocks disposition. I'll probably get inspired from it. shot_20090323223845-140.png Anyway, I do not see errors. When does the error appears ? at the connexion time or when you click on start ? Let me know... If it appears when you click on start, there may be...

Hi Grael, This is a good solution to run a task in background (i.e., with a low priority). This background task will be interrupted (preempted) by the main control task.. On some microcontrollers, calling function from interrupt may cause problems. That must be tested/checked. Just set the timer int...

I had a quick look. On the model prinple, it is Ok. However, I noticed few possible problems : - It seems that data length is 8 bits on the with this SP12 Tyre pressure sensor. Thus, SPI Should be configured with 8 bit data length. (except if you use 16 bits length commands) - Uart : 9% error @11520...

Hi Karthikeyan, To resume, you are to adapt the complementary filter presented on the wiki for the Spark " IMU 5 Degrees of Freedom " card. just want the output in angles I like "just" ;-) Anyway, - Calculations are in double thus no problems about fixed point overflow or so on... - The bias you set...

Hi Magic, after computer received the data,the time interval would be about the sampling time(0.002s) That true, but you should really recompute a time vector of exactly 0.002s as the dsPIC quartz is much better than the bad approximation that is done with the RS232GUI. If you do not overload the UA...

Hi Lucien, I can propose the same solution than crh (No time to have a look by myself by right-now)

<em>LubinKerhuel</em> wrote:if you want to give it a try and publish results, I can provide you with a blockset with C function call avaialble.

Let me know

Lubin

Hi Magic, Thanks for this interresting question. I tried to complete the doc of the Interface_Tx-Matlab page. I added that : T_R is an approximation of time only, and shoudl be used for vewing purpose only. If you need precise data time stapm, follow the following procedure : * On the simulink model...

Do not install inside the matlab directory.
is it a 32 bit of 64 bit matlab ?

Hi Casparus,

This is not planned yet. However, if you want to give it a try and publish results, I can provide you with a blockset with C function call avaialble.

Lubin

Hi, Simulink configuration is Ok. That a problem about the installation of the Microchip C30 compiler. There is 2 version of this compiler on the microchip website. (As fas as I remember, C30 for Pic24 and C30 for dsPIC30f). Install them booth. Make sure that this file exist : C:\PROGRA~1\MICROC~1\M...

HTL wrote:if thats not the right one which target do i have to choose?

That's definitly not the right target ! You must choose, within the list,microcontroller your are targetting. it can be a dsPIC30f2010 or any of the given list, but not "choose_dsPIC_Target".

Lubin

Thanks for the picture that help. The system target file is selected (dspic.tlc) properly: Ok But you did not select the PIC/dsPIC you are using in the Master block. Thus, dbl click on the master block, and select your target (for the moment, the selected target is 'Choose_dsPIC_Target', as written ...

RideZeBigOne wrote:adding legends on scope

Don't know, but colors are always in the same order : yellow, magenta,...

Hello, where am i setting whether the port B is a input or a output port ? That is set automatically, depending if you use Port read or port write blocks... window says that the configuration bits are not proper and its defaulting to preset default values Problems comes from that. Try generating the...

Hi -mcpu=choose_dsPIC_Target That mean that you did not selected the target in the Master block ! http://www.kerhuel.eu/RTWdsPIC/examples ... MPLAB.html That's may be old pages. Please go to the wiki for more "up to date ;-)" informations. Try compiling an example from the example directory ! and th...

Hello Jose Luis,

I have hardly no time at the moment to have a close look. I'll try later on. Anyway, Feel free to complete the wiki page. Let me know if you get trouble because of right permission to edit it or so...

Lubin

Hello Gladiac, Mariano, I'am quite overloaded (Working on both the next blockset version and my PhD ...) forgot this thread. Sorry about that. Thanks Gladiac for the last model you posted. I'll try to have a look next week. (it is not urgent for anybody? ) I'll report results If it is not already do...

Hi Magic, I don't go into the QEI code, I leave this part to Mariano and Ender ... I did not see errors in the model somewhere else. - QEI Init code is called after the configuration of others peripheral (That's OK). - Sampling time is Ok - double in C function GetQEI is a 32 bit real in Simulink (w...

Hi Martin,

I did not get your question. It would be helpfull to add a quick draw with transfert functions (or a simulink model)
Lubin

The IMU page I provide has schematic for the electronics parts. But for testing purpose, you could just test the SPI output and clock output. They should works, even when not connected to any another system. In this way, SPI bus is much more easier to debug than I2C (I2C does not work when nothing's...

Hi Manu, It's likely I will not get time to do testing today... anywat, SPI has been tested on project on 30f chip. (for example in IMU ) but wasn't used yet (at least by myself) on project with 33f chip. Few changes between spi on 33F and 30f appears on the SPIxCON register, but bits that changes a...

That's correct, but acceleration here is not the true acceleration of the IMU itself, but a change in the gravity vector orientation to which the accelerometer is sensitive.

Hi manu, SPI (MASTER) generates clock signal only while sending data. No clock otherwise. I tested Peripheral mapping on this chip with the Rx-Tx UART block. As it works, It should be the same for every mapped peripheral. Thus, I have no idea. You should perhaps try to make SPI work starting a new M...

There is thus no relationhsip with ADC ? you confirm that SPI alone is not working ? In the Port mapping, try to map all pin of the SPI1 peripheral (with clock In = Clock-Out ; RP11 on your model ; and map also Data Input) Did you check generated code for port mapping ? SPI code shoud work as I am u...

You can upload directly on the forum (look tab 'upload attachement' at the bottom when writting a message) or even by mail.

I may have a look during the week-end and but I can't promise to find the problem by tuesday... even more if it is not obvious

Lubin

Hi Manu, I did not used yet theses chip with port mapping function on projects, thus there may be buggy. Could you please upload your model on the forum ? That would help for testing. Also, you may have a look on the C code generated by the real time workshop (configure your model to generate the ht...

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