Comments on: Using the Analog To Digital Converter. http://extremeelectronics.co.in/avr-tutorials/using-the-analog-to-digital-converter/ Wed, 08 Feb 2012 03:41:24 +0000 hourly 1 http://wordpress.org/?v= By: Andre http://extremeelectronics.co.in/avr-tutorials/using-the-analog-to-digital-converter/comment-page-2/#comment-36065 Andre Tue, 20 Dec 2011 22:24:33 +0000 http://extremeelectronics.co.in/?p=17#comment-36065 Hi Avinash & thanks for this wonderful page of AVR. I have a question friend. where returns the function return(ADC)? thanks Hi Avinash & thanks for this wonderful page of AVR. I have a question friend. where returns the function return(ADC)? thanks

]]> By: Avinash http://extremeelectronics.co.in/avr-tutorials/using-the-analog-to-digital-converter/comment-page-2/#comment-33622 Avinash Sun, 27 Nov 2011 04:58:20 +0000 http://extremeelectronics.co.in/?p=17#comment-33622 <strong>@Abhilash Thanks, but I personally don't like Arduinos. So I am never gonna work on those.</strong> @Abhilash

Thanks, but I personally don’t like Arduinos. So I am never gonna work on those.

]]> By: Abhilash http://extremeelectronics.co.in/avr-tutorials/using-the-analog-to-digital-converter/comment-page-2/#comment-33621 Abhilash Sun, 27 Nov 2011 04:52:00 +0000 http://extremeelectronics.co.in/?p=17#comment-33621 Sir thank you very much for your great support through these tutorials.Please post tutorials on arduino development boards. I hope that in future Arduino Uno will be there in your online shop. Thank you. Sir thank you very much for your great support through these tutorials.Please post tutorials on arduino development boards.
I hope that in future Arduino Uno will be there in your online shop.
Thank you.

]]> By: Antzy http://extremeelectronics.co.in/avr-tutorials/using-the-analog-to-digital-converter/comment-page-2/#comment-32066 Antzy Thu, 10 Nov 2011 06:20:11 +0000 http://extremeelectronics.co.in/?p=17#comment-32066 Hi, Just wanted to point out that ADCSRA should be set as: ADCSRA=(1<<ADEN)|(1<<ADPS2)|(1<<ADPS1)|(1<<ADPS0); //Enable ADC with Prescalar=Fcpu/128 You did not shift 1 by ADPS1 and ADPS0 in the explanation while it is written correctly in the code. Hope I'm not wrong... Hi,
Just wanted to point out that ADCSRA should be set as:

ADCSRA=(1<<ADEN)|(1<<ADPS2)|(1<<ADPS1)|(1<<ADPS0); //Enable ADC with Prescalar=Fcpu/128

You did not shift 1 by ADPS1 and ADPS0 in the explanation while it is written correctly in the code.
Hope I'm not wrong…

]]> By: Avinash http://extremeelectronics.co.in/avr-tutorials/using-the-analog-to-digital-converter/comment-page-2/#comment-31356 Avinash Thu, 03 Nov 2011 03:11:40 +0000 http://extremeelectronics.co.in/?p=17#comment-31356 <strong>@Mike see this http://extremeelectronics.co.in/avr-tutorials/programming-in-c-tips-for-embedded-development/</strong> @Mike

see this
http://extremeelectronics.co.in/avr-tutorials/programming-in-c-tips-for-embedded-development/

]]> By: Mike http://extremeelectronics.co.in/avr-tutorials/using-the-analog-to-digital-converter/comment-page-2/#comment-31317 Mike Wed, 02 Nov 2011 16:58:13 +0000 http://extremeelectronics.co.in/?p=17#comment-31317 Hello.I have a problem understanding this line of code: ADMUX=(1<<REFS0); I know that "<<" is the bitshift operator. The operation x<<n shifts the value of x left by n bits. If REFS0 is initial 0 then 1 is shifted to the left by 0 positions. So in the right-hand side we have the bit value 1 and this value is assign to ADMUX(a register with 8 bits).Is this possible? I'll appreciate if you could help me figure out this problem. Thanks. Hello.I have a problem understanding this line of code:
ADMUX=(1<<REFS0);
I know that "<<" is the bitshift operator. The operation x<<n shifts the value of x left by n bits. If REFS0 is initial 0 then 1 is shifted to the left by 0 positions. So in the right-hand side we have the bit value 1 and this value is assign to ADMUX(a register with 8 bits).Is this possible? I'll appreciate if you could help me figure out this problem.
Thanks.

]]> By: Jeraj http://extremeelectronics.co.in/avr-tutorials/using-the-analog-to-digital-converter/comment-page-2/#comment-30040 Jeraj Sun, 16 Oct 2011 11:25:30 +0000 http://extremeelectronics.co.in/?p=17#comment-30040 Its really a nice tutorial for new guys in avr!!! thanx dear.!! Its really a nice tutorial for new guys in avr!!!
thanx dear.!!

]]> By: Jeraj http://extremeelectronics.co.in/avr-tutorials/using-the-analog-to-digital-converter/comment-page-2/#comment-30039 Jeraj Sun, 16 Oct 2011 11:24:53 +0000 http://extremeelectronics.co.in/?p=17#comment-30039 Its really a nice tutorial for new guys in avr!!! Its really a nice tutorial for new guys in avr!!!

]]> By: kusum http://extremeelectronics.co.in/avr-tutorials/using-the-analog-to-digital-converter/comment-page-2/#comment-24812 kusum Tue, 28 Jun 2011 06:36:21 +0000 http://extremeelectronics.co.in/?p=17#comment-24812 thank u.it is a great tutorial.but i have a question if instead of using lcd we would like to the accelerometer values in eeprom of atmega128,then what do we need to do? thank u.it is a great tutorial.but i have a question if instead of using lcd we would like to the accelerometer values in eeprom of atmega128,then what do we need to do?

]]> By: Sadiqur Rahman http://extremeelectronics.co.in/avr-tutorials/using-the-analog-to-digital-converter/comment-page-2/#comment-22517 Sadiqur Rahman Fri, 03 Jun 2011 06:21:15 +0000 http://extremeelectronics.co.in/?p=17#comment-22517 Is there any way to test segment program without Microcontroller. I means that I wanna test segment code as a new programmer in my PC. Please reply to me... Is there any way to test segment program without Microcontroller. I means that I wanna test segment code as a new programmer in my PC. Please reply to me…

]]> By: Visualize ADC data on PC Screen using USART - AVR Project | eXtreme Electronics http://extremeelectronics.co.in/avr-tutorials/using-the-analog-to-digital-converter/comment-page-2/#comment-22392 Visualize ADC data on PC Screen using USART - AVR Project | eXtreme Electronics Thu, 02 Jun 2011 02:56:22 +0000 http://extremeelectronics.co.in/?p=17#comment-22392 [...] Analog To Digital Convertor [...] [...] Analog To Digital Convertor [...]

]]> By: LED with adjustable flash, need help http://extremeelectronics.co.in/avr-tutorials/using-the-analog-to-digital-converter/comment-page-2/#comment-19646 LED with adjustable flash, need help Sat, 02 Apr 2011 10:06:09 +0000 http://extremeelectronics.co.in/?p=17#comment-19646 [...] the register names and found this tutorial which appears to be for the same hardware you are using. Using the Analog To Digital Converter. | eXtreme Electronics Probably way too much help [...] [...] the register names and found this tutorial which appears to be for the same hardware you are using. Using the Analog To Digital Converter. | eXtreme Electronics Probably way too much help [...]

]]> By: Avinash http://extremeelectronics.co.in/avr-tutorials/using-the-analog-to-digital-converter/comment-page-2/#comment-19361 Avinash Sun, 27 Mar 2011 02:48:13 +0000 http://extremeelectronics.co.in/?p=17#comment-19361 <strong>declare percent as float like</strong> <code>float percent; percent = (adc_result*100.00)/1023.00;</code> declare percent as float like

float percent;
percent = (adc_result*100.00)/1023.00;

]]> By: dama http://extremeelectronics.co.in/avr-tutorials/using-the-analog-to-digital-converter/comment-page-2/#comment-19357 dama Sun, 27 Mar 2011 00:05:58 +0000 http://extremeelectronics.co.in/?p=17#comment-19357 Hi, I'm having a problem regarding with getting the percentage of the adc reading. I am using this equation percent=(adc_result1*100)/1023. I get my percentages right, but the problem is that after 64 percent it jumps to 1 percent again, I was wondering if you could help me figure out the problem. Hi, I’m having a problem regarding with getting the percentage of the adc reading. I am using this equation percent=(adc_result1*100)/1023. I get my percentages right, but the problem is that after 64 percent it jumps to 1 percent again, I was wondering if you could help me figure out the problem.

]]> By: praveen http://extremeelectronics.co.in/avr-tutorials/using-the-analog-to-digital-converter/comment-page-2/#comment-18359 praveen Fri, 04 Mar 2011 03:50:46 +0000 http://extremeelectronics.co.in/?p=17#comment-18359 please provide some insight into use of ADC in differential mode and a sample code to assist beginners . please provide some insight into use of ADC in differential mode and a sample code to assist beginners .

]]> By: dinesh ygv http://extremeelectronics.co.in/avr-tutorials/using-the-analog-to-digital-converter/comment-page-2/#comment-18160 dinesh ygv Sun, 27 Feb 2011 14:03:25 +0000 http://extremeelectronics.co.in/?p=17#comment-18160 There is a function named LCDInit(LS_BLINK|LS_ULINE) in the code given above but, the actual name of the function in lcd.h supplied by your web-site in LCD usage tutorial has the function InitLCD(LS_BLINK|LS_ULINE). Please consider changing this and make this to be in sync with that tutorial. There is a function named LCDInit(LS_BLINK|LS_ULINE) in the code given above but, the actual name of the function in lcd.h supplied by your web-site in LCD usage tutorial has the function InitLCD(LS_BLINK|LS_ULINE).

Please consider changing this and make this to be in sync with that tutorial.

]]> By: Jayant http://extremeelectronics.co.in/avr-tutorials/using-the-analog-to-digital-converter/comment-page-2/#comment-17259 Jayant Fri, 04 Feb 2011 18:44:02 +0000 http://extremeelectronics.co.in/?p=17#comment-17259 Sorry for the question posted in my previous comment. I didn't noticed the bitwise operator '|' in ADMUX|=ch;. Anyway thanking you. Sorry for the question posted in my previous comment.
I didn’t noticed the bitwise operator ‘|’ in ADMUX|=ch;.
Anyway thanking you.

]]> By: Jayant http://extremeelectronics.co.in/avr-tutorials/using-the-analog-to-digital-converter/comment-page-2/#comment-17254 Jayant Fri, 04 Feb 2011 16:27:49 +0000 http://extremeelectronics.co.in/?p=17#comment-17254 hi, thanks for the great tutorial.....it is really very helpful for beginners like me. i had a doubt....in your ReadADC routine when you say : ch=ch&0b00000111; ADMUX|=ch; we are also setting the REFS1 and REFS2 to 0.....which means we are no more using AVCC as our reference voltage(which we were supposed to do). Please correct me if i am going wroing somewhere. thanking you in advance. hi, thanks for the great tutorial…..it is really very helpful for beginners like me.
i had a doubt….in your ReadADC routine when you say :
ch=ch&0b00000111;
ADMUX|=ch;
we are also setting the REFS1 and REFS2 to 0…..which means we are no more using AVCC as our reference voltage(which we were supposed to do).
Please correct me if i am going wroing somewhere.

thanking you in advance.

]]> By: Chris http://extremeelectronics.co.in/avr-tutorials/using-the-analog-to-digital-converter/comment-page-2/#comment-16543 Chris Fri, 14 Jan 2011 13:36:26 +0000 http://extremeelectronics.co.in/?p=17#comment-16543 I apologize for my ignorance. I wasn’t asking for an arithmetic lesson, just help with the C code which I am a beginner. I was enjoying your website and tutorials until I was ridiculed. What’s the sense of publishing tutorials for beginners if you are clearly offended by a beginner’s questions. Phill, thanks for being open minded and not blinded by ego. I apologize for my ignorance. I wasn’t asking for an arithmetic lesson, just help with the C code which I am a beginner. I was enjoying your website and tutorials until I was ridiculed. What’s the sense of publishing tutorials for beginners if you are clearly offended by a beginner’s questions. Phill, thanks for being open minded and not blinded by ego.

]]> By: Phill http://extremeelectronics.co.in/avr-tutorials/using-the-analog-to-digital-converter/comment-page-2/#comment-16536 Phill Fri, 14 Jan 2011 08:33:22 +0000 http://extremeelectronics.co.in/?p=17#comment-16536 @Avinash, im not sure that that would work. If you divided by 1023, then the answer would be one as it cant deal with decimal fractions unless your using the float data type. If you only need 1% accuracy, why not grab the 7most significant bits from adc times by 100 and then divide by 127. That way you can advoid floats, and your code should be significantly faster (because your advoiding floats, and using smaller numbers!) @Avinash, im not sure that that would work. If you divided by 1023, then the answer would be one as it cant deal with decimal fractions unless your using the float data type. If you only need 1% accuracy, why not grab the 7most significant bits from adc times by 100 and then divide by 127. That way you can advoid floats, and your code should be significantly faster (because your advoiding floats, and using smaller numbers!)

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