cs_ex1_DCOSetup.c

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//******************************************************************************
//   MSP430FR59xx Demo - Configure MCLK for 8MHz operation
//
//   Description: Configure SMCLK = MCLK = 8MHz
//
//           MSP430FR59x
//         ---------------
//     /|\|               |
//      | |               |
//      --|RST            |
//        |               |
//        |               |
//        |          P3.4 |---> SMCLK = MCLK = 8MHz
//******************************************************************************
#include "driverlib.h"
 
void main(void)
{
    //Stop WDT
    WDT_A_hold(WDT_A_BASE);
 
    //Set DCO Frequency to 8MHz
    CS_setDCOFreq(CS_DCORSEL_0,CS_DCOFSEL_6);
 
    //configure MCLK, SMCLK to be source by DCOCLK
    CS_initClockSignal(CS_SMCLK,CS_DCOCLK_SELECT,CS_CLOCK_DIVIDER_1);
    CS_initClockSignal(CS_MCLK,CS_DCOCLK_SELECT,CS_CLOCK_DIVIDER_1);
 
    // output SMCLK
    GPIO_setOutputLowOnPin(
        GPIO_PORT_P3,
        GPIO_PIN4
    );
 
    GPIO_setAsPeripheralModuleFunctionOutputPin(
        GPIO_PORT_P3,
        GPIO_PIN4,
        GPIO_TERNARY_MODULE_FUNCTION
    );
 
    /*
     * Disable the GPIO power-on default high-impedance mode to activate
     * previously configured port settings
     */
    PMM_unlockLPM5();
 
    while(1);
}