My timer code is failing when IAR is configured to do max optimization
- by Vishal
Hi,
I have used timer A in MSP430 with high compiler optimization, but found that my timer code is failing when high compiler optimization used.
When none optimization is used code works fine.
This code is used to achieve 1 ms timer tick. timeOutCNT is increamented in interrupt.
Following is the code
[Code]
//Disable interrupt and clear CCR0
TIMER_A_TACTL = TIMER_A_TASSEL | // set the clock source as SMCLK
TIMER_A_ID | // set the divider to 8
TACLR | // clear the timer
MC_1; // continuous mode
TIMER_A_TACTL &= ~TIMER_A_TAIE; // timer interrupt disabled
TIMER_A_TACTL &= 0; // timer interrupt flag disabled
CCTL0 = CCIE; // CCR0 interrupt enabled
CCR0 = 500;
TIMER_A_TACTL &= TIMER_A_TAIE; //enable timer interrupt
TIMER_A_TACTL &= TIMER_A_TAIFG; //enable timer interrupt
TACTL = TIMER_A_TASSEL + MC_1 + ID_3; // SMCLK, upmode
timeOutCNT = 0;
//timeOutCNT is increased in timer interrupt
while(timeOutCNT <= 1); //delay of 1 milisecond
TIMER_A_TACTL = TIMER_A_TASSEL | // set the clock source as SMCLK
TIMER_A_ID | // set the divider to 8
TACLR | // clear the timer
MC_1; // continuous mode
TIMER_A_TACTL &= ~TIMER_A_TAIE; // timer interrupt disabled
TIMER_A_TACTL &= 0x00; // timer interrupt flag disabled
[/code]
Can anybody help me here to resolve this issue? Is there any other way we can use timer A so it works fine in optimization modes? Or do I have used is wrongly to achieve 1 ms interrupt?
Thanks in advanced.
Vishal N
