;******************************************************************************* ; MSP430G2xx1 Demo - Timer_A, Toggle P1.0, CCR0 Cont Mode ISR, DCO SMCLK ; ; Description: Toggle P1.0 using software and TA_0 ISR Toggles every ; 50000 SMCLK cycles SMCLK provides clock source for TACLK ; During the TA_0 ISR, P1.0 is toggled and 50000 clock cycles are added to ; CCR0 TA_0 ISR is triggered every 50000 cycles CPU is normally off and ; used only during TA_ISR ; ACLK = n/a, MCLK = SMCLK = TACLK = default DCO ; ; MSP430G2xx1 ; ; /|\| XIN|; | | | ; |RST XOUT|; | | ; | P1.0| >LED ; ; D Dang ; Texas Instruments Inc ; October 2010 ; Built with IAR Embedded Workbench Version: 5.10 ;******************************************************************************* #include "msp430g2231.h" ; ORG 0F800h ; Program Reset ; RESET mov.w #0280h,SP ; Initialize stackpointer StopWDT mov.w #WDTPW+WDTHOLD,&WDTCTL ; Stop WDT SetupP1 bis.b #001h,&P1DIR ; P1.0 output SetupC0 mov.w #CCIE,&CCTL0 ; CCR0 interrupt enabled mov.w #50000,&CCR0 ; SetupTA mov.w #TASSEL_2+MC_2,&TACTL ; SMCLK, contmode ; Mainloop bis.w #CPUOFF+GIE,SR ; CPU off, interrupts enabled nop ; Required only for debugger ; ; TA0_ISR; Toggle P1.0 ; xor.b #001h,&P1OUT ; Toggle P1.0 add.w #50000,&CCR0 ; Add Offset to CCR0 reti ; ; ; ; Interrupt Vectors ; ORG 0FFFEh ; MSP430 RESET Vector DW RESET ; ORG 0FFF2h ; Timer_A0 Vector DW TA0_ISR ; END