CC2652R: SPI sensors + SD FAT file system, Hard Fault: FORCED: BUSFAULT: IMPRECISERR

Sebastian Marzetti

Prodigy 50 points

Part Number: CC2652R
Other Parts Discussed in Thread: LPSTK-CC1352R

Hello,

I'm working with a SoC CC2652R and I'm using CCS Version: 10.3.0.00007 and simplelink_cc13x2_26x2_sdk_5_10_00_48.

For the moment I Have 3 tasks:

Task Manager, priority = 3
- this task manages the system, it receives interrupts from the sensor controller and has a virtual timer at 1 KHz
Task SPI, priority = 4
- this task read an IMU at 100 Hz
Task SD, prority = 2
- this tasks interfaces a SD card using fatfs when the task manager as for

I'm trying to read the SD card at 10 times per second simultaneously with the task SPI reading the IMU at 100 Hz. However, the CC2652R crash, i have an exception

This is the exception:

Thank you,

Best regards,

Sebastian

over 4 years ago

0 daniel_o over 4 years ago

TI__Genius 10610 points

Sebastian,

Please see this e2e thread, which seems to be similar to the issue you are describing. https://e2e.ti.com/support/wireless-connectivity/bluetooth-group/bluetooth/f/bluetooth-forum/772857/compiler-cc2642r-m4_0-impreciserr-delayed-busfault

The most likely culprit is a stack overflow or memory corruption. Be sure to check this debugging guide: https://dev.ti.com/tirex/explore/content/simplelink_cc13x2_26x2_sdk_5_10_00_48/docs/ble5stack/ble_user_guide/html/ble-stack-5.x-guide/debugging-index.html#debugging

Additionally, I see that an exception occurs in the scif_framework.c file at the function scifCtrlTasksNbl(). This is the function to start/terminate SC tasks. It might be helpful to debug your sensor controller code and see if you can catch this exception.

Regards,

Daniel

0 Valentin Gies over 4 years ago

Prodigy 10 points

Daniel,

Is there a sample code of a datalogger using SPI devices and logging to a SD Card, all under TI-RTOS ? This could be a wonderful help for us.

Thanks a lot for your help, best regards,

Valentin

0 daniel_o over 4 years ago in reply to Valentin Gies

TI__Genius 10610 points

Valentin,

There isn't an example of doing both since we try to keep examples simple. We want the examples to be easily understood, modified, and able to integrate into other projects.

There is an example of writing data to an SD card, here: https://dev.ti.com/tirex/explore/node?node=AKlE5x0mZKSr09EkdhdoPg__pTTHBmu__LATEST

And an example of reading sensor data from multiple SPI sensors here: https://dev.ti.com/tirex/explore/node?node=AOIH63Cn648CXJqHALlJuw__pTTHBmu__LATEST (note: this example is based on the LPSTK-CC1352R which has on-board sensors, but can apply to the CC2652R LaunchPad as well)

Regards,

Daniel

0 Sebastian Marzetti over 4 years ago in reply to daniel_o

Prodigy 50 points

Hello Daniel,

Thanks a lot for your help, It was an overflow in the SPI task.

I declared local variables for the SPI buffers with variable size each time a transfer was done. I fixed it declaring global variables as you do in the spimaster example and it works.

Thanks again,

Best regards,

Sebastian

Sub-1 GHz

Sub-1 GHz forum

CC2652R: SPI sensors + SD FAT file system, Hard Fault: FORCED: BUSFAULT: IMPRECISERR