Honored ContributorHi!!!
I'm making air-condition model. I need to use 3 temperature sensors. I'm found sensors from DALLAS type DS18B20. Is anybody have got a VHDL code to steering this type of sensors??? P.S. I have Quartus 7.2 and altera with Cyclone II Bugzee
Honored ContributorXilinx Xapp198 implements an one-wire interface and can give you some hints.
Honored ContributorIt is much more easier.
Get in contact with Maxim, the companie that bought Dallas. Ask for the 1-Wire Master source code available in verilog HDL http://www.maxim-ic.com/appnotes.cfm/an_pk/119 (http://www.maxim-ic.com/appnotes.cfm/an_pk/119) all you need is to write an avalon wrapper around that modul to interface it to nios II and of course some software that controls this ip ...Honored ContributorI'm already asking maxim (dallas) support for this sensor. They haven't any example in verilog or VHDL.
Honored ContributorThis is interesting as i have received a zip from them ...
did you ask for this package ? ds1wm synthesizable 1-wire bus master (http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2834) this package has a couple of files, but you only need the onewiremaster.v and your avalon wrapper around it.Honored ContributorHonored Contributoryou should ask for the DS1WM as the DS18B20 is a component.
DS1WM is a 1-wire master available as source code. unfortunately i don't think that i am allowed to distribute the file Maxim sent to me. There is a reason why they want to be contacted before they give out the sources for free.
