external interrupt: XMEGA

[nevoMV]

Hi @all,

how can I use an external interrupt witn an XMEGA (micromedia for XMEGA)?
I tried this:

Code: Select all

var TASTER_INT_DIR : sbit at PORTH_DIR.B0;
TASTER_INT_DIR := 0;                  // Port als Eingang setzen


procedure Taster_press_ISR(); org IVT_ADDR_PORTH_INT0;
begin
       do something
end;

Thanks!

[janko.kaljevic]

Hello,

All you need to do is to set external interrupt pins, level and enable it.
Please try something like this:

Code: Select all

  PORTH_INT0MASK := 0;              // Set PORTH interrupt on PORTH.0 pin
  PORTH_PIN0CTRL := 1;              // Set External Interrupt on rising edge
  PORTH_INTCTRL := 2;               // Enable medium level external interrupt
  
  PMIC_CTRL := 2;                    // Enable medium level interrupts
  CPU_SREG.B7 := 1;                  // Enable global interrupts

Best regards.