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Hi,
I am new to the MSP430 from ARM based controllers, and I'm using the MSP-FET430U40A board with the MSP430FR5xxx 40-Pin FET tool with an MSP430FR5739. I have a very simple program that sets up TimerA0 and TimerA1. Timer A0 outputs a PWM signal on P1.1, and I want to set Timer A1 to trigger an interrupt at some configurable time interval so that I can modify the duty cycle of the PWM signal generated by Timer A0. I cannot for the life of me get any timer interrupt to call. I've read every post and tried all of the suggestions with no success, so I was hoping that someone here could get me on the right track. I'm using Code Composer Studio 6.0.1 to develop the project. This is the code that I have so far:
My Main Function:
#include <msp430.h>
#include "Setup.h"
#include "MPPT.h"
#include "ADCRead.h"
int main(void) {
WDTCTL = WDTPW | WDTHOLD; // Stop watchdog timer
int i = 0;
Sys_Init();
while (1);
}My Setup function:
void Sys_Init(){
CSCTL0_H = 0xA5;
CSCTL1 = DCOFSEL0 + DCOFSEL1; // Set DCO max setting = 8MHz
CSCTL2 = SELA__DCOCLK + SELM__DCOCLK + SELS__DCOCLK; // set all clocks to be sourced from DCO
CSCTL3 = DIVA__2 + DIVM__2 + DIVS__32; // set all dividers
//ACLK is divided by 2 (4MHz), Mclock divided by 2 (4MHz)
//SMCLK is divided by 32 (250 kHz)
// CSCTL4 = SMCLKOFF; //Turn SMCLK off to save power
P1DIR |= BIT0; // P1.0 output
P1SEL0 |= BIT0; // P1.0 options select
TA0CCR0 = CYCLES_30KHZ; // PWM Period (to get 30 kHz, -> 4MHz/30kHz = 133)
TA0CCTL1 = OUTMOD_7 + CCIE; // CCR1 reset/set mode
TA0CCR1 = 66; // CCR1 PWM duty cycle (50% of value in TA0CCR0 is half of duty cycle)
TA0CTL = TASSEL__ACLK + MC__UP + TACLR; // ACLK as source, up mode, clear Timer A0
TA1CCTL0 = CCIE;// + OUTMOD_7;
TA1CCR0 = CYCLES_2SEC/8; //Timer A1 resets every 2 seconds
TA1CTL = TASSEL__SMCLK + MC__UP + TACLR + ID_2; // SMCLK as source, up mode, clea r Timer A1, Input Clock/8 (31.25 KHz)
// + TAIE; //Timer A1 interrupt enabled
}
My ISRs for the Timers (I've enabled the CCR0 interrupt for both timers just to see if I can get anything to trigger, which I can't):
#pragma vector=TIMER1_A0_VECTOR
__interrupt void TIMER1_A0(void){
LPM0_EXIT;
TA1CTL &= ~TAIFG; //Clear the interrupt flag
int temp = TA1IV;
// TA1IV = 0; //clear interrupt vector
}
#pragma vector=TIMER0_A0_VECTOR
__interrupt void TIMER0_A0(void){
LPM0_EXIT;
TA0CTL &= ~TAIFG; //Clear the interrupt flag
int temp = TA0IV;
// TA1IV = 0; //clear interrupt vector
}
#pragma vector=TIMER1_A1_VECTOR
__interrupt void TIMER1_A1(void){
LPM0_EXIT;
TA1CTL &= ~TAIFG; //Clear the interrupt flag
int temp = TA1IV;
// TA1IV = 0; //clear interrupt vector
}
#pragma vector=TIMER0_A1_VECTOR
__interrupt void TIMER0_A1(void){
LPM0_EXIT;
TA0CTL &= ~TAIFG; //Clear the interrupt flag
int temp = TA0IV;
// TA1IV = 0; //clear interrupt vector
}
As always, thank you in advance for any help you can provide.
-Chris Hack
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