CCS/MSP430FR2633: Enabling Multiple Reference Caps at the Same Time

Part Number: MSP430FR2633

Tool/software: Code Composer Studio

Hello,

I'm trying to enable two reference caps for two CapTIvate blocks but as soon as a ref cap for the second block is enabled, the ref cap for the fist block is disabled automatically. I need both of them enabled at the same time. The following code sample from the CAPT_HAL.h file shows that multiple ref caps are availible but is it possible to enable size 1 and 3 (for mutual mode) at the same time since both have the same value. 

//!  Enable a Reference cap for a specific block.  The element definition,
//!  tElement.ui8RxBlock, is used to determine which block the reference 
//!  capacitor is applied to.  The reference capacitor size is defined in the 
//!  following table:
//!  Size   Self Value  Mutual Value
//!     0    1.0pF         0.1pF
//!     1    1.0pF         0.5pF
//!     2    5.0pF         0.1pF
//!     3    5.0pF         0.5pF
//!     4    1.1pF         0.1pF
//!     5    1.5pF         0.1pF
//!     6    5.1pF         0.1pF
//!     7    5.5pF         0.1pF
//!
//!  \param pElement = pointer to element
//!  \param capSize = size of cap
//!  \par Returns
//!		none
//
//*****************************************************************************
extern void CAPT_enableRefCap(tElement* pElement, uint8_t capSize);

Maybe it is also the very same ref cap and that's the reason why it can be enabled for both blocks? But even when I choose two different sized ref caps, only the latter one remains enabled.
Maybe the way I implement the code is bad practice. In the main.c file right after "CAPT_appStart();" line I wrote these lines:

CAPT_enableRefCap(&BTN00_E00, 3);
CAPT_enableRefCap(&BTN00_E16, 1);

BTN00_E00 and BTN00_E16 refer to arbitrary sensor elements on two different CapTIvate blocks.

I thought of a workaround where I enable a ref cap for a specific element (or rather the block it is assigned to) right before it gets updated. For this I needed to separate the sensor matrix into the two respective capTIvate blocks and then add an if clause in the for loops of the void CAPT_calibrateUI and the void CAPT_calibrateupdateUI functions in the CAPT_Manager.c file. It seems to work as it is now but this solution "feels" kind of awkward. I would be glad if you clould provide me another way to keep multiple reference caps enabled. Also it would be nice if there is a way to enable multiple ref caps for one block at the same time for higher capacitance values. Thanks in advance!

Best Regards
Canbey