Posted on June 21, 2006 at 05:05Hi,
I'm working in the Keil uVision3 IDE with the Keil CARM compiler.
I want to create a delayed software interrupt (with the lowest priority) after a given number of adc samples. In my test application I was also toggling some IO pins on port 2. While debugging it seemed that there was constantly an interrupt pending on the XTI (P2.8 --- P2.11).
Am I forgetting something or can I avoid this?
here is my code.
Code:
int main(void)
{
...
...
config_interrupts(DISABLE);
config_irq_channel_priority(IRQ_CHANNEL_XTI, IRQ_PRIORITY_XTI);
config_irq_channel(IRQ_CHANNEL_XTI, ENABLE);
XTI->CTRL |= 0x02;
config_interrupts(ENABLE);
...
...
}
void adc_isr(void)__arm
{
...
if(sample_cnt == 30)
{
// activate delayed interrupt
XTI->SR |= 0x01;
}
...
}
void xti_isr(void) __arm
{
XTI->PRH = 0x00;
XTI->PRL = 0x00;
XTI->SR = 0;
//handle adc samples
}
