Dear Zhengsu, First don't forget to enable the appropriate interrupt in ADC12IE.
Be sure to 'toggle' ENC bit of ADC12CTL0 within your ADC12 ISR to allow the subsequent Timer A signals to trigger the next ADC12 conversion. See MSP430x1xx User Manual chapter (slau049d.pdf Rev D) section 17.2.6 ADC12 Conversion Modes paragraph Single-Channel Single-Conversion Mode "When any other trigger source is used, ENC must be toggled between each conversion." The same is also true for Sequence-of-Channels Mode. Regards, Brian Capoccia Fluke Corporation -----Original Message----- From: mspgcc-users-ad...@lists.sourceforge.net [mailto:mspgcc-users-ad...@lists.sourceforge.net]on Behalf Of Gao Zhengsu Sent: Wednesday, April 14, 2004 10:44 AM To: mspgcc-users@lists.sourceforge.net Subject: Re: [Mspgcc-users] About msp430x149 Hi,Mark Thank you for your good way!! I read manual said that we can use TamerA OUTPUT UNIT1 to trigger ADC12 conversion like this TACTL = TASSEL_2+MC_2; // Timer_A setup TACCTL1 = OUTMOD_3; // CCR1 setup TACCR1 = 0x0fff; // Compare value ADC12CTL0 = ADC12ON+SHT0_2; // Turn on ADC12, set sampling time ADC12CTL1 = SHS_1+SHP; // TAOUT.1 triggers sampling timer ADC12CTL0 |= ENC; // Enable conversions ADC12CTL0 |= ADC12SC; // Start conversion but this doen's work to my code , it never stop by ADC interrupt routine. What's the reason? Thank you! Regards Zhengsu ------------------------------------------------------- This SF.Net email is sponsored by: IBM Linux Tutorials Free Linux tutorial presented by Daniel Robbins, President and CEO of GenToo technologies. Learn everything from fundamentals to system administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click _______________________________________________ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
