Compiler/CC2640: Dual SPI transfer at the same time not working well

Hady Hlehel

Part Number: CC2640

Tool/software: TI C/C++ Compiler

Hey,

I'm using 2 SPI's in cc2640 , each SPI transaction separately work's fine , when I'm trying to get both SPI work together one of them stop working .

First SPI defined as master and the seconds one defined as slave ,SPI master continue to work , but the SPI slave after 10-20 transfers stop to react

Should 2 SPI transfers work together ?

Thanks .

over 7 years ago

0 Clément over 7 years ago

TI__Guru** 101540 points

Hi,

I confirm that the two SPIs are supposed to work fine together. Here are some elements to check:

- Is there a pin conflict between the two SPIs?

- Does the callback functions are well written? Not too long? Not waiting too long?

- “The slave stops working after 10-20 transfers”. Is it always the same amount of transfers? Is it related to a number of transfers or to any other event (i.e. end of a transfer of the other SPI)?

- Is there a conflict in the data accessed by the two SPIs? Are they sharing some memory?

To finish, you should (at least) have a look to these two threads:

https://e2e.ti.com/support/wireless-connectivity/bluetooth/f/538/t/476198

https://e2e.ti.com/support/wireless-connectivity/bluetooth/f/538/t/632794

Best regards,

Code Composer Studio™︎

Code Composer Studio forum

Compiler/CC2640: Dual SPI transfer at the same time not working well