| Re: ADC in Free Running Mode Kategorie: Programmierung C (von Torsten - 26.01.2013 16:39) | ||
| Als Antwort auf Re: ADC in Free Running Mode von PepeV - 26.01.2013 8:55 | ||
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>> Hi Torsten, > > Glad you want to help me. Let's see if we can figure this out together. > I have come to some conclusions: > 1. According to the C-Control-pro manual, an assembler call cannot be interrupted. > So there is no need anymore to disable the global interrupt flag. Hello Pepe, (1) I do not believe, PeterS switches off the interrupt functions before every assembler call. Certainly the callback functions won't be execute anymore. But the interrupt functions are still active. > 2. I think saving and restoring SREG is only needed in case of an interrupt routine. > So we can leave out these instructions. (2) I don't know. I never saw a 'cli' without a saving from 'SREG'. > 3. The ATmega128 manual, p. 233, last line but three, says: "The first conversion > must be started by writing a logical one to the ADSC bit in ADCSRA." > So we need to set ADSC only once, before entering the loop. (3) That's right, but only in free-running-mode. > 4. I increased the addresses of ADMUX, ADCSRA, ADCH, ADCL and SREG with > 0x20 as should. The new addresses are out of range of the instructions in, out, cbi, > sbi and cbis. This causes the compile errors I mentioned. These instructions will > have to be replaced by combinations of others ("typically lds and sts combined with > sbrs, sbrc, sbr, and cbr"). > I could try to work this out (maybe Sunday) but I would appreciate your solution > very much. (4) I am using the definitions from the 'm128def.inc' file. This file comes with the AVRStudio. So I can exchange the assemblercode between the C-Control-IDE and the AVRStudio. I have never a problem with this. The AVRStudio has a very nice debugger. I would recommend very much to try the AVRStudio. Try ADCapture-0.02 below. GruÃ? Torsten > > Regards, > Pepe ADCapture-0.02.zip | ||
Antwort schreiben Antworten:  Re: ADC in Free Running Mode (von PepeV - 29.01.2013 22:21)Re: ADC in Free Running Mode (von Torsten - 30.01.2013 18:08)Re: ADC in Free Running Mode (von PepeV - 31.01.2013 21:16)Re: ADC in Free Running Mode (von PepeV - 2.02.2013 13:28)Re: ADC in Free Running Mode (von PepeV - 2.02.2013 15:31)Re: ADC in Free Running Mode (von Torsten - 4.02.2013 19:38)Re: ADC in Free Running Mode (von PepeV - 5.02.2013 13:27)Re: ADC in Free Running Mode (von Torsten - 6.02.2013 21:43)Re: ADC in Free Running Mode (von PepeV - 8.02.2013 17:43)Re: ADC in Free Running Mode (von Torsten - 9.02.2013 10:18)Re: ADC in Free Running Mode (von PepeV - 9.02.2013 14:57)Re: ADC in Free Running Mode (von PepeV - 11.02.2013 18:29)Re: ADC in Free Running Mode (von Torsten - 11.02.2013 21:07)Re: ADC in Free Running Mode (von PepeV - 12.02.2013 19:54) | ||
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