Hi all,
I'm starting to test the MSP-EXP430FR4133 and running the msp430fr413x_RTC_01.c sample code, the power consumption in sleep is way to high from the one advertised for the FR4133.
This is the graph:
This is the code:
#include <msp430.h>
int main(void)
{
WDTCTL = WDTPW | WDTHOLD; // Stop watchdog timer
P4SEL0 |= BIT1 | BIT2; // set XT1 pin as second function
do
{
CSCTL7 &= ~(XT1OFFG | DCOFFG); // Clear XT1 and DCO fault flag
SFRIFG1 &= ~OFIFG;
}while (SFRIFG1 & OFIFG); // Test oscillator fault flag
P1OUT &= ~BIT0; // Clear P1.0 output latch for a defined power-on state
P1DIR |= BIT0; // Set P1.0 to output direction
PM5CTL0 &= ~LOCKLPM5; // Disable the GPIO power-on default high-impedance mode
// to activate previously configured port settings
// Initialize RTC
// RTC count re-load compare value at 32.
// 1024/32768 * 32 = 1 sec.
RTCMOD = 32-1;
// Source = 32kHz crystal, divided by 1024
RTCCTL = RTCSS__XT1CLK | RTCSR | RTCPS__1024 | RTCIE;
__bis_SR_register(LPM3_bits | GIE); // Enter LPM3, enable interrupt
}
// RTC interrupt service routine
#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector=RTC_VECTOR
__interrupt void RTC_ISR(void)
#elif defined(__GNUC__)
void __attribute__ ((interrupt(RTC_VECTOR))) RTC_ISR (void)
#else
#error Compiler not supported!
#endif
{
switch(__even_in_range(RTCIV,RTCIV_RTCIF))
{
case RTCIV_NONE: break; // No interrupt
case RTCIV_RTCIF: // RTC Overflow
P1OUT ^= BIT0;
break;
default: break;
}
}
Where can I find more samples about low power configuration and tips? What can I do to improve this code above?
Many thanks in advance,
Pedro
