;******************************************************************************* ; MSP430G2x31 Demo - ADC10, DTC Sample A1 32x, AVcc, Repeat Single, DCO ; ; Description: Use DTC to sample A1 32 times with reference to AVcc Software ; writes to ADC10SC to trigger sample burst In Mainloop MSP430 waits in LPM0 ; to save power until ADC10 conversion burst complete, ADC10_ISR(DTC) will ; force exit from any LPMx in Mainloop on reti ADC10 internal oscillator ; times sample period (16x) and conversion (13x) DTC transfers conversion ; code to RAM 200h - 240h P1.0 set at start of conversion burst, reset on ; completion ; ; MSP430G2x31 ; ; /|\| XIN|; | | | ; |RST XOUT|; | | ; > -|P1.1/A1 P1.0| >LED ; ; D Dang ; Texas Instruments Inc ; October 2010 ; Built with Code Composer Essentials Version: 4.2.0 ;******************************************************************************* cdecls C,LIST, "msp430g2231.h" ; -.text ; Program Start ; -RESET mov.w #0280h,SP ; Initialize stackpointer StopWDT mov.w #WDTPW+WDTHOLD,&WDTCTL ; Stop WDT SetupADC10 mov.w #CONSEQ_2+INCH_1,&ADC10CTL1 ; Repeat single channel, A1 mov.w #ADC10SHT_2+MSC+ADC10ON+ADC10IE,&ADC10CTL0 ; bis.b #02h,&ADC10AE0 ; P1.1 ADC option select mov.b #020h,&ADC10DTC1 ; 32 conversions SetupP1 bis.b #001h,&P1DIR ; P1.0 output ; Mainloop bic.w #ENC,&ADC10CTL0 ; busy_test bit #BUSY,&ADC10CTL1 ; ADC10 core inactive? jnz busy_test ; mov.w #0200h,&ADC10SA ; Data buffer start bis.b #001h,&P1OUT ; P1.0 = bis.w #ENC+ADC10SC,&ADC10CTL0 ; Sampling and conversion start bis.w #CPUOFF+GIE,SR ; LPM0, ADC10_ISR will force exit bic.b #001h,&P1OUT ; P1.0 = jmp Mainloop ; Again ; ; ADC10_ISR; Exit LPM0 on reti ; bic.w #CPUOFF,0(SP) ; Exit LPM0 on reti reti ; ; ; -; Interrupt Vectors ; -.sect ".reset" ; MSP430 RESET Vector short RESET ; sect ".int05" ; ADC10 Vector short ADC10_ISR ; end