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  Topic: ATTiny44 ADC reference selection
jasreb

Replies: 10
Views: 1729

PostForum: BASCOM-AVR Archive   Posted: Fri Oct 05, 2007 2:05 pm   Subject: ATTiny44 ADC reference selection
Hi there (again!)

I am trying to change the ADC reference in Bascom for an ATTiny44.

If I use

Config Adc = Single , Prescaler = 16 , Reference = 0

or simply

Config Adc = Single , P ...
  Topic: ATTiny44 temperature measurement
jasreb

Replies: 0
Views: 139

PostForum: BASCOM-AVR Archive   Posted: Fri Oct 05, 2007 1:58 pm   Subject: ATTiny44 temperature measurement
Hi there

I am trying to use the internal temperature measurement facility of the ATTiny44. According to the Atmel data sheet, this is selected via ADC channel 8.

I have tried using:

Vadc=Get ...
  Topic: simulator help
jasreb

Replies: 1
Views: 122

PostForum: BASCOM-AVR Archive   Posted: Fri Oct 05, 2007 1:01 pm   Subject: simulator help
At risk of sounding like a complete muppet, can someone point me in the direction of some useful info for getting started using the simulator? The help file seems pretty unhelpful, I was just wonderin ...
  Topic: maths modulo question
jasreb

Replies: 16
Views: 689

PostForum: BASCOM-AVR Archive   Posted: Fri Oct 05, 2007 12:53 pm   Subject: maths modulo question
Strangely enough, reverting to using " /256 " results in less compiled code than 2lines with a "Shift R,8" command followed by "var1 = var2"


Config Adc = Single , Prescaler = 16 ...
  Topic: maths modulo question
jasreb

Replies: 16
Views: 689

PostForum: BASCOM-AVR Archive   Posted: Fri Oct 05, 2007 12:32 pm   Subject: maths modulo question
this is the neatest/most compact compiled I have come up with so far:




Config Adc = Single , Prescaler = 16 ', Reference = vcc
Start Adc

Dim Vadc As Word ...
  Topic: maths modulo question
jasreb

Replies: 16
Views: 689

PostForum: BASCOM-AVR Archive   Posted: Fri Oct 05, 2007 12:13 pm   Subject: maths modulo question
You have 2 multiplies by 5, two divisions by 256, and a mult by 100 to do this numerically. If you did it in strings it could look something like this:

Vbatt = Vadc * 500 'scale up to voltage * 10 ...
  Topic: maths modulo question
jasreb

Replies: 16
Views: 689

PostForum: BASCOM-AVR Archive   Posted: Thu Oct 04, 2007 5:17 pm   Subject: maths modulo question
You are correct, Format wont do that. But you could as easily use the Left and Mid or Right string operations to chop the numbers up, after converting to strings. I suspect the string operations are ...
  Topic: maths modulo question
jasreb

Replies: 16
Views: 689

PostForum: BASCOM-AVR Archive   Posted: Thu Oct 04, 2007 2:40 pm   Subject: maths modulo question
Hi,

There is no Hardware Multiplier in an ATtiny44.

See Parametric Product Table:
http://www.atmel.com/dyn/products/param_table.asp?family_id=607&OrderBy=part_no&Direction=ASC

Try th ...
  Topic: maths modulo question
jasreb

Replies: 16
Views: 689

PostForum: BASCOM-AVR Archive   Posted: Thu Oct 04, 2007 2:34 pm   Subject: maths modulo question
Hi,

There is no Hardware Multiplier in an ATtiny44.

See Parametric Product Table:
http://www.atmel.com/dyn/products/param_table.asp?family_id=607&OrderBy=part_no&Direction=ASC

Try th ...
  Topic: maths modulo question
jasreb

Replies: 16
Views: 689

PostForum: BASCOM-AVR Archive   Posted: Thu Oct 04, 2007 8:21 am   Subject: maths modulo question
Hi,

I just testet your code on mega8 & 16 it works fine
can it be the attiny44.dat that dont work or your 1.11.8.7 ?

hmm that's interesting.. I'm assuming there must be a compiler bug the ...
  Topic: maths modulo question
jasreb

Replies: 16
Views: 689

PostForum: BASCOM-AVR Archive   Posted: Thu Oct 04, 2007 8:19 am   Subject: maths modulo question
I cant see what is wrong with your code, but there is a built-in way of scaling an integer to display a fixed number of decimals. Look up the Format command in Bascom Help.

Essentially you calcula ...
  Topic: maths modulo question
jasreb

Replies: 16
Views: 689

PostForum: BASCOM-AVR Archive   Posted: Thu Oct 04, 2007 1:19 am   Subject: maths modulo question
Hi

thanks for the reply - I thought of that, but it seems a bit tedious to create a table with that many entries for a problem that should be fairly simple to solve mathematically.

The code does ...
  Topic: maths modulo question
jasreb

Replies: 16
Views: 689

PostForum: BASCOM-AVR Archive   Posted: Wed Oct 03, 2007 11:50 pm   Subject: maths modulo question
hi there

I am trying to measure a battery pack voltage (0-20V) and display the result in the form xx.yy where xx = units and yy = decimals, ie 15.65V would give xx = 15 and yy = 65.

I have a 1: ...
  Topic: modulo maths question
jasreb

Replies: 0
Views: 118

PostForum: BASCOM-AVR Archive   Posted: Wed Oct 03, 2007 11:44 pm   Subject: modulo maths question
hi there

I am trying to measure a battery pack voltage (0-20V) and display the result in the form xx.yy where xx = units and yy = decimals, ie 15.65V would give xx = 15 and yy = 65.

I have a 1: ...
  Topic: pwm code problems with ATtiny13 and 15
jasreb

Replies: 8
Views: 2007

PostForum: BASCOM-AVR Archive   Posted: Wed Jan 05, 2005 10:18 am   Subject: pwm code problems with ATtiny13 and 15
Still wondering - does anybody have any idea why Bascom 'pwm' does not work with ATtiny13? Is it just not implemented (yet) or am I missing something obvious?

Failing that, does anyone have some s ...
 
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