samuelbrucksch/gfb

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gfb's Issues

Faulty temperature readings in DS2438 library - ds2438::readTempC() looses sign when shifting data from read

What steps will reproduce the problem?
1. When the the temperqature drops below zero the sensor gives wrong readings

See: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1289330809/0

What is the expected output? What do you see instead?
expected negative values, see positive

What version of the product are you using? On what operating system?
-

Please provide any additional information below.
In the thread on the forum a solution is proposed by me to change readTempC() 
function to correct the output. This need to be confirmed by someone who has 
such sensor (and a freezer :)
Rob Tillaart

Original issue reported on code.google.com by [email protected] on 10 Nov 2010 at 8:11

Ds2438 library

Trying to run the humidity program and I get compile errors like " stray 
|'277'. These are coming from the DS2438.ccp file. Any idea? Which Onewire 
library are you uing.

Thanks

Original issue reported on code.google.com by [email protected] on 16 Aug 2010 at 12:55

• Merged into: #2

DS2423 counter loops at 8 bit

What steps will reproduce the problem?
1. count larger values than 255
2. ???
3. Profit

What is the expected output? What do you see instead?
expected: 256, what i got: 1

What version of the product are you using? On what operating system?
Arduino IDE 1.01

Please provide any additional information below.

Original issue reported on code.google.com by [email protected] on 22 Jan 2013 at 8:12

readTempC does not wait until TB in status register is cleared

The readTempC() function now does a delay(20) after requesting a new 
temperature. Accorfing to the datasheet one should wait until the TB flag is 
cleared in the status register.

see discussion @ http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1289330809/0

[code]
  // wait until TB register clears, see page 15/29 datasheet
  // iso delay(20);
  boolean ready = false;
  while (!ready)
  {
     //copy data from eeprom to scratchpad & read scratchpad
    _readMem(_scratchPad);
    ready = ( _scratchPad[STATUS]  & 0x10) == 0x00;
    delay(10);  // wait before reread of the scratchpad
  }
  // TB is cleared so conversion is ready
[/code]

Same is possibly true for the other readings, did not look after that.



What steps will reproduce the problem?


What is the expected output? What do you see instead?


What version of the product are you using? On what operating system?


Please provide any additional information below.

Original issue reported on code.google.com by [email protected] on 10 Nov 2010 at 8:23