Unable to connect to the 'TI Delfino F2833x (boot from flash)' target..

Hi,

i'm developping a Simulink schematic to drive MOSFETs with a f28335 DSP(Clock 150Mhz). I'm using 4 ADC input ports (Inputs) and drives 4 ePWM (2 times active high complementary A&B).

I don't have any issue with the DSP itself, but when I build the code on it, the DSP 'disconnect' from the computer, so I can't read the scope in my schematics. The code continue to run normally on the DSP, but I don't have access to the scopes, which is not usefull.

Here's the error i have:

Error occurred while executing External Mode MEX-file 'ext_comm': Failed to connect to the target. A time-out occurred while waiting for the connection response from the target. Possible reasons for the time-out: a) The target is not switched on. b) The target is not connected to your host machine. c) The application for the model is not running on the target. You might have clicked the Stop button. If the Run button is not dimmed, click it. Otherwise, click the Build button, which downloads and runs your application on the target. Component:Simulink | Category:Block diagram error Unable to connect to the 'TI Delfino F2833x (boot from flash)' target for 'PID_Twist_DSP_f28335slx'.

With the f28069 DSP (Clock 90Mhz) , i don't have this issue.

Does anyone have any idea where this is coming from ?

Thanks

Answer 1

[Venkatesh Chilapur]

Please check the following:

1. If you are working with docking station, the position of SW1 is the key. As per the control card info sheet: The position should be OFF. OFF –SW1 in the “OFF” position allows GPIO-28 to be used as a GPIO. Serial communication is still possible, however an external transceiver is needed such as the FTDI – FT2232D chip. This is primarily used for communicating over the USB to serial bridge included in the onboard XDS100 JTAG emulation on many C2000 development boards.

2. And, the J9 connector on the docking station should be closed, i.e a jumper must be put in the place.

3. The GPIO pins are 28 and 29 for SCI Rx and Tx respectively on the control card.

4. After these settings the first thing to test is the SCI operation using a tool like Putty just to ensure the Tx and Rx are intact and then move to external mode.

Also ensure the CCS is not currently running and is closed.

[Charles Gagné-Carrier]

Thanks for the fast answer!

It solved my problem.

[Dinusha Nawarathne]

Hi, I have built an three phase voltage source inverter and I'm trying to implement my control technique on the c2000 f28335 controlCard with the docking station. I'm trying to get a test voltage input to the micro controller using a ZMPT101B module. I have connected the output of the module to the A0 port with a reference to the ground. The module outputs a voltage between 0 to 2.5V. But I get the same error message as mentioned above. I tried doing the above stuff as well. The SW1 is in USB position(Hope it's off position as the opposite side mentions ON), Connected the 2 pins in J9 connetor using a jumper. May be I'm missing something in the steps you have mentioned. Please direct me to the correct path. I'm reaching the deadline of my project demo :|

Here is the error message

Error occurred while executing External Mode MEX-file 'ext_comm': Failed to connect to the target. A time-out occurred while waiting for the connection response from the target. Possible reasons for the time-out: a) The target is not switched on. b) The target is not connected to your host machine. c) The application for the model is not running on the target. You might have clicked the Stop button. If the Run button is not dimmed, click it. Otherwise, click the Build button, which downloads and runs your application on the target.

Looking forward,

Thanks in advance.

[Charles Gagné-Carrier]

Hi !

Just to be sure, when we mentionned SW1 to 'off' positions , it's on the f28335 itself (a very tiny switch) and not the one on the dev kit as you mentionned in your question.

[Dinusha Nawarathne]

Thank you very much. It worked. I thought it was the SW1 in the board. Finally found it after several minutes.

Thanks again!

[Neelesh Yadav]

Hi,

I'm getting same error that is target is not connected and all.

I've done all the settings i.e. SW1 = off (on the controller) and JP9 = closed using jumper wire (On Docking station).

Is ther any connection that i have to do apart form these two connection.

[Venkatesh Chilapur]

Please ensure the COM port in external mode pane is inline with port as shown in windows device manager.

Under SCI-A pane ensure to select the GPIO pins as 28 and 29.

[Neelesh Yadav]

Yes sir, all are correct.

PFA

[Neelesh Yadav]

Error file

[Venkatesh Chilapur]

How about other troubleshooting steps?

No external mode, use SCI-A transmit block and see if you can recieve the data in host using a tool like putty. Ensure no other application is already using this COM port.

Also ensure to check 'option Load VCP' for Auxiliary port.

[Neelesh Yadav]

Sir,

I'm not getting it. Controller is working fine in normal mode. Can you give solution for this?

Answer 2

[Venkatesh Chilapur]

Do you see the COM port listed under device manager? Have you specified the same COM port for external mode in hardware config parameters? Could you provide snaphots for the same?

Also ensure you are not using this serial COM port from within your application. Try sending the serial data from a simple application model over USB serial connection and collect data in Putty and see if this link is working.

[Dinusha Nawarathne]

Your previous solution worked. I didn't switch on the SW1 in the control card first. But once I did it worked.

I have a small problem though. Is it possible to view real time waveform from the input I get from the ADC pin? The scope didn't diisplay any waveform while it was running. But when I stopped it and opened the scope it showed sone parts of the waveform, a broken waveform.

[Charles Gagné-Carrier]

Hi !

what is the highest sampling rate in your program ? I had this problem when mine was too high.

Also, you can right click on a plot in your scope, click on "configuration" and put it in "scroll Simulinkmode" (instead of wrap mode), with a long time frame period (try something like 100 sec).

[Dinusha Nawarathne]

I'm just using a separate simple model to test whether I can get inputs properly. I'll do that and let you know my results asap

[Dinusha Nawarathne]

Sorry for the delay. It worked properly. Thank you

[Shafquat]

hello, please can you share a pic where to connect a jumper on J9? because its very complex and where to connect jumper to other connection. I have also attached an image for J9 connector. Thanx.

Answer 3

[Venkatesh Chilapur]

Please refer this example:

https://in.mathworks.com/help/supportpkg/texasinstrumentsc2000/examples/adc-pwm-synchronization-via-adc-interrupt.html

[Dinusha Nawarathne]

Thank you I will refer it.

[Dinusha Nawarathne]

Hello I referred the example. In my inverter design instead of feeding an analog signal to the EPWM i have designed the simulink model to extract the phase angle from the grid and then use it to for a dq0 transformation in order to build a current control loop. But I face 2 major problems,

• The input signal I read from the scope once I input a signal corresponding to the grid voltage to the c2000 f28335 delfino using voltage sensor module ZMPT101B doesn't take the shape of a sine wave. (waveform is attached)
• I tried to implement a PLL block inside the c2000 micro controller and it gave an error message. Do you have any fix for this please?

Thanks in advance

[Venkatesh Chilapur]

Hi,

We suggest to contact https://www.mathworks.com/support/contact_us.html for advanced questions.

[Charles Gagné-Carrier]

Hi Dinusha,

maybe I can help you with the first problem.

• The input signal I read from the scope once I input a signal corresponding to the grid voltage to the c2000 f28335 delfino using voltage sensor module ZMPT101B doesn't take the shape of a sine wave. (waveform is attached)

It doesn't take the shape of a sine wave since the signal is discretized by the scope. In that case, it seems like the discretization (of the scope) is too slow compared to your signal.

One way to fix that (or at least, to get better results) is with the following steps :

1. In the Menu Tab, go in (Code -> External Mode Control Panel)
2. Click on 'Signal and Triggering'
3. In 'Trigger Option', try to diminish the value of the 'duration'. (Mine was initially equal to 8, I've changed it for 1.... I don't know if you can put smaller duration than that, like 0.1... I'll let you try, since I don't have my f28335 with me now)

• I tried to implement a PLL block inside the c2000 micro controller and it gave an error message. Do you have any fix for this please?

What kind of error did you get ?

Hope it will fix your first issue,

Charles

[Dinusha Nawarathne]

Hi charles,

Thanks for the reply. I tried your idea. The least I could put in for duration was 1. Now I have a continous signal, but it's a digitial signal. Attached below

The maximum sampling time I could use for the ADC block was 1e-5. Error occured when I increased it.

About the PLL, The error is as follows. I'm pasing the latter part of the error message. Please let me know if there's a way I could implement a PLL block in MATLAB and use it through c2000. My whole project is stuck there.

"C:/ProgramData/MATLAB/SupportPackages/R2018a/toolbox/target/supportpackages/tic2000/src/c28335.cmd", line 65: error: program will not fit into available memory. placement with alignment/blocking fails for section ".text" size 0x4d09 page 0. Available memory ranges: RAML4L7 size: 0x4000 unused: 0x3e6e max hole: 0x3e6e error: errors encountered during linking; "../adcinputtest.out" not built >> Compilation failure gmake: *** [../adcinputtest.out] Error 1 D:\prj\adcinputtest_ert_rtw>echo The make command returned an error of 2 The make command returned an error of 2 D:\prj\adcinputtest_ert_rtw>An_error_occurred_during_the_call_to_make 'An_error_occurred_during_the_call_to_make' is not recognized as an internal or external command, operable program or batch file. ### Creating HTML report file adcinputtest_codegen_rpt.html

### Build procedure for model: 'adcinputtest' aborted due to an error.

Error(s) encountered while building "adcinputtest": ### Failed to generate all binary outputs.

[Charles Gagné-Carrier]

Try the following (just in case you didn't try it before) :

1. Go in the config parameters -> Hardware Implementation
2. In the section 'Target hardware ressources', check the ''Boot from flash'' checkbox. (Near to the device name)

I don't know if this will help, but I had the same error a couple of weeks ago.

Charles

[Dinusha Nawarathne]

Did you succefully deploy a PLL to f28335?

[Charles Gagné-Carrier]

It was not a PLL, but I had a similar error while I was programming my project. (memory problem)

This solution was just a guess !

Answer 4

[Dhamodharan]

HI,

check this attachment it may help you.