ucs_ex1_DCO12MHz.c File Reference

#include "driverlib.h"

Go to the source code of this file.

Macros
#define	UCS_MCLK_DESIRED_FREQUENCY_IN_KHZ   12000
#define	UCS_MCLK_FLLREF_RATIO   366

Functions
void	main (void)
void	NMI_ISR (void)

Variables
uint32_t	clockValue = 0
uint16_t	status

Macro Definition Documentation

UCS_MCLK_DESIRED_FREQUENCY_IN_KHZ

#define UCS_MCLK_DESIRED_FREQUENCY_IN_KHZ   12000

Software Toggle P1.0 with ~12MHz DCO

Toggle P1.0 by xor'ing P1.0 inside of a software loop. ACLK is brought out on pin P11.0, SMCLK on P11.2, and MCLK on P11.1. PMMCOREV = 1 to support up to 12MHz clock

ACLK = REFO = ~32kHz, MCLK = SMCLK = 12MHz

          MSP430F5438A
      -----------------
  /|\|                 |
   | |            P11.0|-->ACLK
   --|RST         P11.1|-->MCLK
     |            P11.2|-->SMCLK
     |                 |
     |             P1.0|-->LED

Note: In order to run the system at up to 12MHz, VCore must be set at 1.6V or higher. This is done by invoking function SetVCore()

This example uses the following peripherals and I/O signals. You must review these and change as needed for your own board:

• UCS module
• GPIO Port peripheral

This example uses the following interrupt handlers. To use this example in your own application you must add these interrupt handlers to your vector table.

• None.

Definition at line 70 of file ucs_ex1_DCO12MHz.c.

UCS_MCLK_FLLREF_RATIO

#define UCS_MCLK_FLLREF_RATIO   366

Definition at line 77 of file ucs_ex1_DCO12MHz.c.

Function Documentation

main()

void main

(

void

)

Definition at line 93 of file ucs_ex1_DCO12MHz.c.

References __delay_cycles(), clockValue, UCS_MCLK_DESIRED_FREQUENCY_IN_KHZ, and UCS_MCLK_FLLREF_RATIO.

NMI_ISR()

void NMI_ISR

(

void

)

Definition at line 164 of file ucs_ex1_DCO12MHz.c.

References status.

Variable Documentation

clockValue

uint32_t clockValue = 0

Definition at line 84 of file ucs_ex1_DCO12MHz.c.

Referenced by main().

status

uint16_t status

Definition at line 91 of file ucs_ex1_DCO12MHz.c.

Referenced by NMI_ISR().