Thats OK. that can be done .. but what is the problem with MSP430ADC12Single interface .. the program which i have sent in previous mail is not even working for 2 ticks .. Am i using proper settings for ADC ? I will check for your suggestion and let u know.
2009/6/25 Michael Schippling <[email protected]> > If I understand correctly your program worked with a Timer at 2 ticks, > but not at 1, right? If so check the return value of the Timer.start() > as there is a lower limit on the tick setting. It may be returning > an error and not starting. The limit used to be 3 in T1 for micas. > MS > > > himanshu barve wrote: > >> Hello Friends .. In my application , i am using two ADC channels .. I need >> to sample them one after other . I am giving some lines from my program >> concerning my problem. In this program i am trying to wire MSP430ADC12Single >> interface. >> But its not working .. >> >> module{ >> >> uses{ >> .. >> .. >> interface MSP430ADC12Single as sensor1; >> interface MSP430ADC12Single as sensor2; >> .. >> .. >> } >> >> command result_t StdControl.init() { >> call sensor1.bind(ADC12_SETTINGS( >> INPUT_CHANNEL_A0, >> REFERENCE_VREFplus_AVss, >> SAMPLE_HOLD_512_CYCLES, >> SHT_SOURCE_ADC12OSC, >> SHT_CLOCK_DIV_1, >> SAMPCON_SOURCE_SMCLK, >> SAMPCON_CLOCK_DIV_1, >> REFVOLT_LEVEL_1_5 >> )); >> call sensor2.bind(ADC12_SETTINGS( ssame as above except channel)) >> } >> command result_t StdControl.start() { >> call Timer.start( TIMER_REPEAT,1); >> return SUCCESS; >> } >> event result_t Timer.fired() { >> call sensor1.getData(); >> call sensor4.getData(); >> } >> >> async event result_t sensor1.dataReady(uint16_t data1) { >> atomic m_adc1 = data1; >> return SUCCESS; >> } >> async event result_t sensor2.dataReady(uint16_t data2) { >> atomic m_adc2 = data2; >> call .... some function(m_adc1,m_adc2) >> return SUCCESS; >> } >> >> } >> -------------------------------------------------------------------- >> >> Previously the same program was running with ADC interface .. >> In previous program timer was in repeat fire mode for 2 ticks. But i want >> it to be 1 tick .. so that i will get 20 samples per 20 milli sec . (which >> is one cycle for 50Hz system). Thus i tried above setting .. But its not >> even working . >> >> While using ADC interface we do not bind ports as in above . we use other >> macro "ASSOCIATE_ADC_CHANNEL" which passes 3 parameter . Other parameters >> are preset in ADC interface. of which difference lies only in two settings. >> instead of SAMPLE_HOLD_512_CYCLES --- SAMPLE_HOLD_4_CYCLES >> instead of SHT_SOURCE_ADC12OSC,---------SHT_SOURCE_SMCLK >> >> >> After discovering this all .. I tried to run previous program with >> changing ADC interface .. with SAMPLE_HOLD_512_CYCLES & >> SHT_SOURCE_ADC12OSC but that is also not working .. >> Help me out of it ..!! I have tried lot of combinations .. but none is >> working .. What i want is fast sampling but two channels at a time .. >> Thanks in advance .. (sorry if i am confusing ..!) >> >> >> >> >> >> -- >> With Best Regards >> Himanshu Barve >> IIT Kharagpur >> >> >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> Tinyos-help mailing list >> [email protected] >> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >> > -- With Best Regards Himanshu Barve IIT Kharagpur
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