cs_ex2_calculateClockSignals.c

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/*******************************************************************************
 * MSP430i2xx Clock System - Calculate Clock Signals
 *
 * Description: In this example, the clock signals are setup as dividers of DCO.
 * MCLK is setup as DCO / 4 = 4.096 MHz and SMCLK is setup as
 * DCO / 8 = 2.048 MHz. ACLK is 32kHz when using the internal resistor for DCO.
 * After setting up the clock signals, APIs are called to ensure that the
 * correct speed was set correctly. The speed is calculated using the register
 * settings.
 *
 *
 *                MSP430i2041
 *             ------------------
 *         /|\|                  |
 *          | |                  |
 *          --|RST               |
 *            |                  |
 *            |                  |
 *            |                  |
 *            |                  |
 *            |                  |
 *
 * Author: Zack Lalanne
 ******************************************************************************/
 
#include "driverlib.h"
 
int main(void) {
 
    volatile uint32_t aclk_speed;
    volatile uint32_t mclk_speed;
    volatile uint32_t smclk_speed;
 
    WDT_hold(WDT_BASE);
 
    // Setting the DCO to use the internal resistor. DCO will be at 16.384MHz
    CS_setupDCO(CS_INTERNAL_RESISTOR);
 
    // Setting dividers for MCLK and SMCLK
    CS_initClockSignal(CS_MCLK, CS_CLOCK_DIVIDER_4);
    CS_initClockSignal(CS_SMCLK, CS_CLOCK_DIVIDER_8);
 
    aclk_speed = CS_getACLK();
    mclk_speed = CS_getMCLK();
    smclk_speed = CS_getSMCLK();
 
    while(1) {
        // Set breakpoint here to view variables
        __no_operation();
    }
}