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| -rw-r--r-- | README.md | 34 | ||||
| -rw-r--r-- | main.c | 10 |
2 files changed, 33 insertions, 11 deletions
@@ -1,27 +1,39 @@ # owi-slave Implementation of an One Wire Interface slave device on an ATTiny 2313A without -external clock. Work-in-progress. +external clock. Though the schematic suggests bus-powered operation, the AVR's power -consumption may be too high for this to work. If connecting the AVR causes the -bus voltage to drop below 3V, consider replacing the capacitors with a ~4.5V -battery. Do not use a mains power supply -- it may not have the same GND as -the 1-Wire bus. +consumption is probably too high for this to work. If connecting the AVR causes +the bus voltage to drop below 3V, consider replacing the capacitors with a +~4.5V battery. Do not use a mains power supply -- it may not have the same +ground level as the 1-Wire bus. # Building +set the desired onewire address in main.S. then run + make && sudo make flash ## supported features -Successfully tested on a DS2482-100 Single Channel 1-Wire Master. -Tests with a commercially available iButton reader will follow soon. +### READ ROM (0x33) + +Works fine. Successfully tested on: + +* DS2482-100 Single Channel 1-Wire Master +* IBL USB iButton reader + +### SEARCH ROM (0xf0) + +the code in main.c works on one-device buses, the code in main.S was not tested +yet. SEARCH ROM on a multi-device bus does not work. + +Successfully tested on: -* Read ROM (0x33) with 64bit identifier -* Search ROM (0xf0) with 64bit identifier -- does not yet check the master - direction indicator, though, so only useful on a one-device bu +* DS2482-100 Single Channel 1-Wire Master ## TODO -* Overdrive Read ROM / Search ROM +* test SEARCH ROM +* implement readout of master direction bit in SEARCH ROM @@ -10,6 +10,16 @@ */ +/* + * +----- NOTE ------ NOTE ------ NOTE ------ NOTE ------ NOTE -----+ + * | | + * | This code is deprecated and no longer maintained. | + * | It is only kept as a reference for main.S | + * | Please refer to main.S for the up-to-date implementation | + * | | + * +----- NOTE ------ NOTE ------ NOTE ------ NOTE ------ NOTE -----+ + */ + /* * Set the 64bit ID (including 8bit CRC) here, in the order in which they are |