Io_test of openMSP430, open‑io_test

Io_test of openMSP430, open‑io_test

 

OpenMSP430: IO functionality test with interupt

#include "omsp_system.h"volatile char shift = 0x01;  // Global variable int main(void) 
{    WDTCTL = WDTPW | WDTHOLD;          // Disable watchdog timer    P2DIR  = 0xff;                     // Port 2.0-2.7 = output    P2OUT  = shift;　　　　　　          // Initialize Port 2    P1DIR  = 0x00;                     // Port 1.0-1.7 = input    P1IE   = 0x01;                     // Port 1.0 interrupt enabled    P1IES  = 0x00;                     // Port 1.0 interrupt edge selection (0=pos 1=neg)    P1IFG  = 0x00;                     // Clear all Port 1 interrupt flags (just in case)       eint();                            // Enable interrupts     while (1) 
　　{      if (P2OUT == 0x00)
　　   {   　　　　P2OUT = shift;     　}
　　　 else if (shift == 0x01)
　　　 {
　　　　　P2OUT = (P2OUT << 1);      }
　　　 else 
　　　 {    　　　P2OUT = (P2OUT >> 1);       }    }}  // Port1 Interrupt Service Routineinterrupt(PORT1_VECTOR) port1_isr(void) 
{   if (P1IFG & 0x01) 
   {     shift　　^=  0x81;     P1IFG   &= ~0x01;　　// Clear Port 1.0 interrupt flag   }}