LAUNCHXL-F28379D: F28379D

Hi,

Dimitar Demirev said:

It compiles without problem, when debugging turning LEDs on and off, changing the delay time and still cannot make it works.

You mean the delay does not work?

Regards,

Gautam

Hi Guatam,

When debugging I can see that the delay function counting up. I can see when the delay function reaches its limit it's toggling the LEDs but in debugging mode only. If I run the program at full speed as it is designed there is no visible blinking of the LEDs. I changed the delay time and there is no visible blinking of the LEDs. This is only with this particular example code.

I will highly appreciate any advice that will give me chance to go ahead.

Dimitar

Hi Dimitar

The example that you are running is made for F2837xD control card. I would fir like to make sure that you have properly configured your pins since you are using a launchpad. There is a subtle difference in the configuration that you need to take care of. 

Please check the following thread and look for my answer on how to configure the Launchpad. e2e.ti.com/.../693580

-Ritvik

Hi Ritvik,

Thank you for your reply.

I've enabled the Predefined Symbol _LAUNCHXL_F28379D and I saw how the highlighted part of the code in device.h for this symbol disappeared. I compiled the code and run it. The problem still persist.
Without changing the code the frequency of blinking is around 8.3kHz. I changed the variable short i to unsigned short i In the delay_loop() function but the lowest frequency that i can get is around 95Hz and blinking still is not visible.
How I can define safely lower clock speed?

Regards,

Dimitar

Hi Dimitar,

If you have added the predefined symbol for Launchpad, then it will take care of the clocks, you won't have to worry about that.
Regarding the pins. I actually checked the schematics in <install dir>\C2000Ware_1_00_xx_00\boards\LaunchPads\LAUNCHXL_F28379D\R2.0\launchxl-f28379d_r2.0_sch.pdf
You have to configure pins as GPIO31 and GPIO34 only as opposed to 12 and 13 in my previous answer(as it was for single core launchpad).

Can you check and tell if your LED pins are configured as 31 and 34 only?
-Ritvik

Hi Ritvik,

The pins are configured as GPIO31 and GPIO34.
The gpio_toggle_cpu01 example code toggles all the GPIO pins of LAUNCHXL-F28379D.
This is visible with oscilloscope. I can see the rectangular pulses on GPIO31 and GPIO34 and other GPIO pins. The measured frequency (~8kHz) is too high to be able to see blinking.

Regards,

Dimitar

Hi Dimitar,
Just to ensure that the device is functioning properly, can you try running a different example for me?
\C2000Ware_1_00_04_00\driverlib\f2837xd\examples\cpu1\led
It's basically the same example but using driverlib. I would need to investigate bit-field example that you are running to see if it has any issues. I will give you an update later on it.
Meanwhile you can try above. Make sure you add the launchpad to the predefined symbols, like you did before.

-Ritvik

Hi,

Instead of using for loop (or while loops)  for the delay use DELAY_US()  function provided in C2000Ware (F2837xD_usDelay.asm file). For loops may compile differently with different compiler switch.

Regards,

Vivek Singh