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 Posted: Aug 16, 2009 - 05:52 AM |
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Joined: Feb 24, 2009
Posts: 398
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I know AVR Butterfly is based on Atmega169, and Atmega169 got 8 ADC inputs, but the AVR Butterfly only has 3 ADC - one temperature, one voltage, one LDR. What about the other 5 more ADC? How can we use the 5 ADC?
With only 2 ADC available (one for voltage and one for LDR) it makes the Butterfly application very limited. I need to use 5 ADC,what should I do? Get another ADC chip? |
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Posted: Aug 16, 2009 - 07:10 AM |
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Joined: Nov 29, 2007
Posts: 3219
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Look into the butterfly manual. It has got the butterfly schematic. Locate the ATmega169 in the schematics, locate the ADC pins. See if they are used for something else, see if you can re-purpose them. All this is rather easy, so no need to whine here.
Yes, the butterfly is limited. It is an evaluation, not an application board. |
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Posted: Aug 16, 2009 - 06:16 PM |
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Joined: Nov 17, 2004
Posts: 6137
Location: Great Smokey Mountains.
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chanseng738 wrote:
I know AVR Butterfly is based on Atmega169, and Atmega169 got 8 ADC inputs, but the AVR Butterfly only has 3 ADC - one temperature, one voltage, one LDR. What about the other 5 more ADC? How can we use the 5 ADC?
With only 2 ADC available (one for voltage and one for LDR) it makes the Butterfly application very limited. I need to use 5 ADC,what should I do? Get another ADC chip?
Look at 'Butterfly Alternate Pin Use' available as a pdf from my downloads section. ADC 4,5,6,7 are available on the JTAG port. Three others are used for the light, temperature, and voltage sensors.
Smiley |
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FREE TUTORIAL: 'Quick Start Guide for Using the WinAVR C Compiler with ATMEL's AVR Butterfly' AVAILABLE AT: http://www.smileymicros.com
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Posted: Aug 16, 2009 - 06:21 PM |
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Joined: Feb 24, 2009
Posts: 398
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| Thanks a lot, smiley! |
_________________
cs
I'm happy ytd, today, and tmr 
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