MSP430FR6047: MTIF frequency output not as expected

Hi Tunguskar,

It looks like you are working from the MTIF example in the SDK. Is that correct?

I started running the example to try to achieve the output you are looking for, and I noticed that the example doesn't quite show how to change the pulse grid frequency properly. Are you seeing this as well?

I ended up fixing it by adding the MTIF_clearPulseGridFreqUpdateRequest() function after updating the pulse grid frequency, and things started to behave as expected. I now have the MTIF set up to output 3 pulses every two seconds, so I'll paste the code for this below. It looks quite similar to yours. I assume that you pulse grid frequency is just "stuck" at an incorrect value.

To use the code below, simply replace the entire section between "/* ---Begin initialize the MTIF--- */" and "/* ---End initialize the MTIF--- */" with the code snippet below:

        /* ---Begin initialize the MTIF--- */
    // Enable the pulse generator, and set the initial grid frequency
    // Pulse grid freq. = 1024Hz (frame freq. = 1024/256 = 4Hz)
    MTIF_clearPulseGenCounter(MTIF_BASE);
    MTIF_enablePulseGen(MTIF_BASE);
    MTIF_setPulseGenPulseGridFreq(MTIF_BASE, MTIF_PULSE_GRID_FREQUENCY_64HZ);
    MTIF_clearPulseGridFreqUpdateRequest(MTIF_BASE);
    // KVAL = 4. 8 pulses per 256 periods of 1024Hz.
    MTIF_setPulseGenCountNum(MTIF_BASE, 3);
    // K-count update request
    MTIF_clearPulseKCountUpdateRequest(MTIF_BASE);
    // Wait for update acknowledge
    while(MTIF_isPulseKCountUpdated(MTIF_BASE) == MTIF_K_COUNT_IS_NOT_UPDATED);
    // Enable the MTIF terminal pins
    MTIF_enableTestPortOutput(MTIF_BASE);
    // Enable test port output
    MTIF_enableTestPortTerminalActivationBySWAndHW(MTIF_BASE);
    // Clear pulse counter and enable pulse counter
    MTIF_clearPulseCounter(MTIF_BASE);
    MTIF_enablePulseCounter(MTIF_BASE);
        /* ---End initialize the MTIF--- */

Please let me know if this does not help or if you have additional questions.