; Ultra-low frequency ~ 1.5kHz, ultra-low power active mode demonstrated.. Dang ; Texas Instruments Inc.
Trang 1; MSP430G2xx2 Demo - Software Toggle P1.0, MCLK = VLO/8
;
; Description; Pulse P1.0 with a 1/100 active duty cycle using software
; Ultra-low frequency ~ 1.5kHz, ultra-low power active mode demonstrated
; ACLK = VL0, MCLK = VLO/8 ~1.5kHz, SMCLK = n/a
;
; MSP430G2xx2
;
-; /|\|
XIN|-; | | |
; |RST
XOUT|-; | |
; | P1.0| >LED
;
; D Dang
; Texas Instruments Inc
; December 2010
; Built with IAR Embedded Workbench Version: 5.10
;*******************************************************************************
#include "msp430g2452.h"
ORG 0F800h ; Program Reset
; -RESET mov.w #0280h,SP ; Initialize stackpointer
StopWDT mov.w #WDTPW+WDTHOLD,&WDTCTL ; Stop WDT
SetupBC bis.b #LFXT1S_2,&BCSCTL3 ; LFXT1 = VLO
SetupOsc bic.b #OFIFG,&IFG1 ; Clear OSC fault flag
bis.w #SCG1+SCG0,SR ; Stop DCO
bis.b #SELM_3+DIVM_3,&BCSCTL2 ; MCLK = LFXT1/8
SetupP1 mov.b #0FFh,&P1DIR ; All P1.x outputs
clr.b &P1OUT ; All P1.x reset
SetupP2 mov.b #0FFh,&P2DIR ; All P2.x outputs
clr.b &P2OUT ; All P2.x reset
;
Mainloop bis.b #001h,&P1OUT ; Set P1.0
Delay1 mov.w #020,R15 ; Delay to R15
L1 dec.w R15 ;
jnz L1 ;
bic.b #001h,&P1OUT ; Reset P1.0
Delay2 mov.w #02000,R15 ; Delay to R15
L2 dec.w R15 ;
jnz L2 ;
jmp Mainloop ; Again
;
; -; Interrupt Vectors
ORG 0FFFEh ; MSP430 RESET Vector
DW RESET ;
END