msp430.c File Reference

MSP430FR5969 CPU initialization. More...

#include "contiki.h"
#include <msp430.h>

Go to the source code of this file.

Functions
static void	msp430_init_dco (void)
	Initialize the Clock System (CS) module.
static void	init_ports (void)
	Initialize all ports to output low to reduce power consumption.
void	msp430_sync_dco (void)
	Synchronize DCO (no-op for FR5969, DCO is automatically calibrated).
int	splhigh_ (void)
	Mask all interrupts that can be masked.

Detailed Description

MSP430FR5969 CPU initialization.

Configures the Clock System (CS) for 8MHz DCO operation.

Definition in file msp430.c.

Function Documentation

init_ports()

void init_ports ( void )

static

Initialize all ports to output low to reduce power consumption.

PJ is intentionally left at its reset default (all inputs):

• PJ.0..PJ.3 carry the JTAG signals used by the eZ-FET probe.
• PJ.4/PJ.5 are the LFXT crystal pins; driving them as outputs would jam the 32.768 kHz oscillator that sources ACLK.

Definition at line 124 of file msp430.c.

msp430_init_dco()

void msp430_init_dco ( void )

static

Initialize the Clock System (CS) module.

Configure:

• DCO at 8 MHz
• MCLK = SMCLK = DCO
• ACLK = LFXT (32.768 kHz on-board crystal), with VLOCLK fallback if the crystal fails to stabilize.

Also configures FRAM wait states for 8MHz operation.

Definition at line 60 of file msp430.c.