MSP430FR2633: Unable to detect capacitive touch in the software

Hi Veer Karan Goy,

I don't see an attachment.

I can see from your comments above you are calling the sensor "keypadSensor" and then "keypad".  Make sure you are consistent with the names.  Not sure if that is the issue, just an observation.

What is your target conversion count and conversion gain settings?

What is your touch threshold setting?

When you touch the sensor while running the GUI, do you see green LED in GUI below the BAR in the BAR Chart view?

When you touch the button, do you see the blue bar go below the green line?  What is the delta measurement between touch and no-touch.

Hi Dennis,

As per your suggestion, we have observed that the blue bar goes below green bar in GUI when touched. The delta value of 134 (touch) and 0-2 (no touch) is seen for 500 and 100 conversion count & gain value. I have also attached the code for your reference. Only LED1 is switched ON in our case. 

#include <msp430.h>                      // Generic MSP430 Device Include
#include "driverlib.h"                   // MSPWare Driver Library
#include "captivate.h"                   // CapTIvate Touch Software Library
#include "CAPT_App.h"                    // CapTIvate Application Code
#include "CAPT_BSP.h"                    // CapTIvate EVM Board Support Package
tElement keypad_E00;
void main(void)
{
//
// Initialize the MCU
// BSP_configureMCU() sets up the device IO and clocking
// The global interrupt enable is set to allow peripherals
// to wake the MCU.
//
WDTCTL = WDTPW | WDTHOLD;
BSP_configureMCU();
__bis_SR_register(GIE);

//
// Start the CapTIvate application
//
CAPT_appStart();

//
// Background Loop
//
while(1)
{
//
// Run the captivate application handler.
// Set LED1 while the app handler is running,
// and set LED2 if proximity is detected
// on any sensor.
//
// LED1_ON;
if(CAPT_appHandler()==true){
   if(keypad_E00.bTouch == true)

     {
         LED2_ON; // ILLUMINATE LED
         LED1_OFF;
     }
      else
      {
          LED2_OFF; // TURN LED OFF
         LED1_ON;
        }


//
// This is a great place to add in any
// background application code.
//
__no_operation();
}
//
// End of background loop iteration
// Go to sleep if there is nothing left to do
//
CAPT_appSleep();

} // End background loop
} // End main()

Hi Dennis

We had already defined "keypad_E00" using extern in CAPT_UserConfig.h file and as per your suggestion we defined it in CAPT_UserCofig.c file instead. Furthermore, we checked again for CAPT_WAKEONPROX_ENABLE (false). But, we are unable to detect captivate touch in the software. For your reference we have also attached an image of how we had defined it previously.

This is really strange.  I took your code and it runs on my BSWP EVM.  If you set a breakpoint somewhere in the if(keypad_E00.bTouch = true {} does the code ever get there?  Or in debug mode reset the code, set a breakpoint on  if(keypad_E00.bTouch = true then put your finger on keypad_E00 and run the code.  When the program stops either mouse over the expression keypad_E00 or add to the expressions window and see if it is true or false.

We have tried your suggestion and the output of "keypad_E00.bTouch" is observed to be false. I am hereby providing the link for the entire project, if you may please run it on your BSWP EVM and check whether  it's working on it. The used version of CCS is 12.6.0 and for GUI it's 1.83.00.08.

drive.google.com/.../1W_JahFk0lFTUS170TGfr-tkwHcshP9-a