| Re: ADC in free running mode Kategorie: Pro-Bot128 (von PeterS - 3.01.2012 18:19) | |
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Als Antwort auf Re: ADC in free running mode von PepeV - 3.01.2012 13:24
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> > Hello Pepe, > > > > you can use the DirAcc_Write() to bring the chip to ADC free running mode. Use the > > necessary intializations that are described in the datasheet. > > > > Regards, > > > > Peter > > Hi Peter, > > Could you please help me a little bit further as I am not familiar with this kind of programming. > > The datasheet says: > Free Running mode is selected by writing the ADFR bit in ADCSRA to one. The first conversion > must be started by writing a logical one to the ADSC bit in ADCSRA. > > Now in the Register Summary there are given 2 adresses for ADCSRA: $06 ($26). Which one > should I use? > > The bits to write are: > â?¢ Bit 5 â?? ADFR: ADC Free Running Select > â?¢ Bit 6 â?? ADSC: ADC Start Conversion > > If I want to set bit 5 and leave the other bits unchanged, what should I do? My guess is: > 1. Read the register value > 2. OR this value with 0b00100000 > 3. Write the result to the register > Is this correct? > > Regards, > Pepe Sorry Pepe, I have not programmed "free running" for an ATMega, only for an ATTiny some years ago. When I have time to read the datasheet, I will tell you. > 1. Read the register value > 2. OR this value with 0b00100000 > 3. Write the result to the register If you have chosen the right bit, these steps are correct. Regards, Peter | |
Antwort schreiben Antworten:  Re: ADC in free running mode (von PepeV - 4.01.2012 16:10)Re: ADC in free running mode (von PeterS - 4.01.2012 18:34)Re: ADC in free running mode (von PepeV - 4.01.2012 22:12)Re: ADC in free running mode (von PeterS - 5.01.2012 11:12)Re: ADC in free running mode (von PeterS - 5.01.2012 11:19)Re: ADC in free running mode (von PeterS - 5.01.2012 11:32)Re: ADC in free running mode (von PepeV - 5.01.2012 16:09)Re: ADC in free running mode (von PepeV - 7.01.2012 13:45)Re: ADC in free running mode (von PeterS - 7.01.2012 16:27)Re: ADC in free running mode (von PepeV - 13.01.2012 11:55) | |
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