Rotary-Encoder-MSP430G2211.zip_WWWg2211COm_msp430G2211_rotary_ro

/* * main.c */ #include <msp430g2211.h> // Timer A0 interrupt service routine #define REA BIT1 #define REB BIT3 unsigned char count; void hand() { static unsigned char oldstate; unsigned char port,state; if(P1IFG & 0x0A){ __delay_cycles(6000); port = P1IN; state= (port & REB)>>3 | (port & REA); if(state==0x3){ if(oldstate ==0x1) { count++; P1OUT ^=BIT0 ; }else if(oldstate == 0x2) { count--; P1OUT ^=BIT6 ; } } oldstate = state; } __delay_cycles(6000); P1IFG = 0x00; } #pragma vector = PORT1_VECTOR __interrupt void p1ch (void) { P1OUT &= ~BIT5; hand(); P1OUT |= BIT5; } #pragma vector = PORT2_VECTOR, TIMERA1_VECTOR,TIMERA0_VECTOR, NMI_VECTOR, WDT_VECTOR __interrupt void Trap_ISR(void) { while(1); } void InitializeClocks(void); void main(void) { WDTCTL = WDTPW + WDTHOLD; // Stop WDT P1SEL = 0x00; P1DIR = 0xE5; //P1,P3,P4 input reset out P1REN = 0xA; P1IE = 0xA; P1IES = 0x00; P1OUT = 0x0B; InitializeClocks(); __enable_interrupt(); //__bis_SR_register(GIE); while(1) { } } void InitializeClocks(void) { BCSCTL1 = RSEL0 +RSEL1+RSEL2+RSEL3; // Set range DCOCTL = DCO0+DCO1 + MOD0+MOD1+MOD2+MOD4; //tune to F Average = 16Mhz BCSCTL2 = SELM_0 ; }