other versions
- jessie 2.9p8-6
- stretch 3.1p5-1
- testing 3.2p2-2
- stretch-backports 3.2p2-2~bpo9+1
- unstable 3.2p3+dfsg1-2
DS2404(3) | One-Wire File System | DS2404(3) |
NAME¶
DS2404, DS2404S, DS1994, DS1427 - EconoRAM time chip, Dual port memory plus time, 4k plus time iButton, Time iButtonSYNOPSIS¶
Real time clock, 4kbit memory. 3-wire interface, too. 04.XXXXXXXXXXXX / alarm | auto | cycle | date | delay | interval | memory | pages/page.[0-15|ALL] | readonly/[memory|clock|cycle|interval] | memory | pages/page.[0-15|ALL] | readonly/[memory|clock|cycle|interval] | running | set_alarm | start | trigger/[cycle,date,interval,udate,uinterval] | udate | uinterval | address | crc8 | id | locator | r_address | r_id | r_locator | type 84.XXXXXXXXXXXX / alarm | auto | cycle | date | delay | interval | memory | pages/page.[0-15|ALL] | readonly/[memory|clock|cycle|interval] | running | set_alarm | start | trigger/[cycle,date,interval,udate,uinterval] | udate | uinterval | address | crc8 | id | present | typeFAMILY CODE¶
- 04
- DS2404 DS1994
- 84
- DS1427 DS2404S
SPECIAL PROPERTIES¶
alarm¶
read-write, unsigned integer (0-111)- C
- cycle counter alarm
- I
- interval timer alarm
- R
- real-time clock alarm
auto¶
read-write, yes-nodate¶
read-write, asciiSat[urday] March 12 12:23:59 2001
Apr[il] 4 9:34:56 2002
3/23/04 23:34:57
current locale setting (your system's format)
delay¶
read-write, yes-nointerval¶
read-write, datememory¶
read-write, binarypages/page.0 ... pages/page.15 pages/page.ALL¶
read-write, yes-noreadonly/[memory|clock|interval|cycle]¶
read-write, yes-no- readonly/memory
- page.X and memory
- readonly/clock
- date and udate
- readonly/interval
- interval
- readonly/cycle
- cycle
running¶
read-write, yes-noset_alarm¶
read-write, unsigned integer (0-111)- C
- cycle counter alarm
- I
- interval timer alarm
- R
- real-time clock alarm
start¶
read-write, yes-notrigger/[cycle,date,interval,udate,uinterval]¶
read-write,variesudate¶
read-write, unsigned integeruinterval¶
read-write, unsigned intervalSTANDARD PROPERTIES¶
address¶
r_address¶
read-only, asciicrc8¶
read-only, asciifamily¶
read-only, asciiid¶
r_id¶
read-only, asciilocator¶
r_locator¶
read-only, asciipresent (DEPRECATED)¶
read-only, yes-notype¶
read-only, asciiALARMS¶
None implemented.DESCRIPTION¶
1-Wire¶
1-wire is a wiring protocol and series of devices designed and manufactured by Dallas Semiconductor, Inc. The bus is a low-power low-speed low-connector scheme where the data line can also provide power. Each device is uniquely and unalterably numbered during manufacture. There are a wide variety of devices, including memory, sensors (humidity, temperature, voltage, contact, current), switches, timers and data loggers. More complex devices (like thermocouple sensors) can be built with these basic devices. There are also 1-wire devices that have encryption included. The 1-wire scheme uses a single bus master and multiple slaves on the same wire. The bus master initiates all communication. The slaves can be individually discovered and addressed using their unique ID. Bus masters come in a variety of configurations including serial, parallel, i2c, network or USB adapters.OWFS design¶
OWFS is a suite of programs that designed to make the 1-wire bus and its devices easily accessible. The underlying priciple is to create a virtual filesystem, with the unique ID being the directory, and the individual properties of the device are represented as simple files that can be read and written. Details of the individual slave or master design are hidden behind a consistent interface. The goal is to provide an easy set of tools for a software designer to create monitoring or control applications. There are some performance enhancements in the implementation, including data caching, parallel access to bus masters, and aggregation of device communication. Still the fundemental goal has been ease of use, flexibility and correctness rather than speed.DS1427 DS1994 DS2404 DS2404S¶
The DS1427 (3), DS1994 (3), DS2404 (3), and DS2404S (3) family of 1-wire devices includes clock functions, with timers, memory, counters and alarms. It is possible to write-protect regians of memory. Uses include software or hardware timing and control.Chips¶
Both the DS2404 (3) and DS2404S (3) have 1-wire and 3-wire interfaces, which might be useful for transferring data between the 2 buses. They act as a passive slave to both busses. The DS2404 (3) and DS2404S (3) require an external source of power and an external crystal. They also offer a reset and 1HZ clock pin.iButtons¶
Both the DS1427 and DS1994 offer the memory, alarms, and clock function in iButton format. Because the iButton is a complete sealed package, battery and crystal are internal. Everything is access via the 1-wire interface.ADDRESSING¶
All 1-wire devices are factory assigned a unique 64-bit address. This address is of the form:- Family Code
- 8 bits
- Address
- 48 bits
- CRC
- 8 bits
- 01.123456789ABC
DATASHEET¶
http://pdfserv.maxim-ic.com/en/ds/DS2404.pdfSEE ALSO¶
Programs¶
owfs (1) owhttpd (1) owftpd (1) owserver (1) owdir (1) owread (1) owwrite (1) owpresent (1) owtap (1)Configuration and testing¶
owfs (5) owtap (1) owmon (1)Language bindings¶
owtcl (3) owperl (3) owcapi (3)Clocks¶
DS1427 (3) DS1904(3) DS1994 (3) DS2404 (3) DS2404S (3) DS2415 (3) DS2417 (3)ID¶
DS2401 (3) DS2411 (3) DS1990A (3)Memory¶
DS1982 (3) DS1985 (3) DS1986 (3) DS1991 (3) DS1992 (3) DS1993 (3) DS1995 (3) DS1996 (3) DS2430A (3) DS2431 (3) DS2433 (3) DS2502 (3) DS2506 (3) DS28E04 (3) DS28EC20 (3)Switches¶
DS2405 (3) DS2406 (3) DS2408 (3) DS2409 (3) DS2413 (3) DS28EA00 (3)Temperature¶
DS1822 (3) DS1825 (3) DS1820 (3) DS18B20 (3) DS18S20 (3) DS1920 (3) DS1921 (3) DS1821 (3) DS28EA00 (3) DS28E04 (3) EDS0064 (3) EDS0065 (3) EDS0066 (3) EDS0067 (3) EDS0068 (3) EDS0071 (3) EDS0072 (3) MAX31826 (3)Humidity¶
DS1922 (3) DS2438 (3) EDS0065 (3) EDS0068 (3)Voltage¶
DS2450 (3)Resistance¶
DS2890 (3)Multifunction (current, voltage, temperature)¶
DS2436 (3) DS2437 (3) DS2438 (3) DS2751 (3) DS2755 (3) DS2756 (3) DS2760 (3) DS2770 (3) DS2780 (3) DS2781 (3) DS2788 (3) DS2784 (3)Counter¶
DS2423 (3)LCD Screen¶
LCD (3) DS2408 (3)Crypto¶
DS1977 (3)Pressure¶
DS2406 (3) TAI8570 EDS0066 (3) EDS0068 (3)Moisture¶
EEEF (3) DS2438 (3)AVAILABILITY¶
http://www.owfs.orgAUTHOR¶
Paul Alfille (paul.alfille@gmail.com)2006 | OWFS Manpage |