projects / sigrok-dumps.git / blame
| Commit | Line | Data |
|---|---|---|
| 1a62770f UH |
1 | ------------------------------------------------------------------------------- |
| 2 | Dallas DS1985 16kbit Add-Only iButton | |
| 3 | ------------------------------------------------------------------------------- | |
| 4 | ||
| 5 | This is a set of example captures of the 1-Wire traffic from a | |
| 6 | Dallas DS1985 iButton device. | |
| 7 | ||
| 8 | This specific iButton device has a registration number of 0x05000000586ce20b | |
| 9 | (family code: 0x05, serial number: 0x000000586ce2, CRC: 0x0b). | |
| 10 | ||
| 11 | The device has the following markings: | |
| 12 | ||
| 13 | Dallas | |
| 14 | 0050 Registered B1 | |
| 15 | 05 0B | |
| 16 | 000000586CE2 | |
| 17 | DS1985-F5 | |
| 18 | ||
| 19 | The "1-Wire/iButton Drivers for Windows" 4.03 software was used with a | |
| 20 | Maxim DS9097U-E25 serial port 1-Wire interface adapter (which itself | |
| 21 | contains a Maxim DS2480B serial 1-Wire line driver chip). | |
| 22 | The DS9097U-E25 was attached to a PC using a USB-to-serial adapter. | |
| 23 | ||
| 24 | The following information can be seen in the Windows software for the | |
| 25 | respective dumps (when clicking on the respective tabs/entries): | |
| 26 | ||
| 27 | Polling: | |
| 28 | ||
| 29 | - The Windows software was configured as follows: | |
| 30 | - Device poll rate: 1 second | |
| 31 | - 1-Wire search mode: Show normal devices | |
| 32 | ||
| 33 | Main memory: | |
| 34 | ||
| 35 | - Contents: all-0xff (pages 0 - 63, each page 32 bytes in size) | |
| 36 | - Start address: 0 | |
| 37 | - Bank size: 2048 bytes | |
| 38 | - General-purpose/non-volatile/read-only/read-write/write-once: Y/Y/N/N/Y | |
| 39 | ||
| 40 | Write protect pages: | |
| 41 | ||
| 42 | - Contents: ff ff ff ff ff ff ff ff | |
| 43 | - Start address: 0 | |
| 44 | - Bank size: 8 bytes | |
| 45 | - General-purpose/non-volatile/read-only/read-write/write-once: N/Y/N/N/Y | |
| 46 | ||
| 47 | Write protect redirection: | |
| 48 | ||
| 49 | - Start address: 0x20 | |
| 50 | - Bank size: 8 bytes | |
| 51 | - General-purpose/non-volatile/read-only/read-write/write-once: N/Y/N/N/Y | |
| 52 | ||
| 53 | Bitmap of used pages for file structure: | |
| 54 | ||
| 55 | - Start address: 0x40 | |
| 56 | - Bank size: 8 bytes | |
| 57 | - General-purpose/non-volatile/read-only/read-write/write-once: N/Y/N/N/Y | |
| 58 | ||
| 59 | Page redirection bytes: | |
| 60 | ||
| 61 | - Contents: all-0xff (pages 0 - 3, each page 16 bytes in size) | |
| 62 | - Start address: 0x100 | |
| 63 | - Bank size: 64 bytes | |
| 64 | - General-purpose/non-volatile/read-only/read-write/write-once: N/Y/N/N/Y | |
| 65 | ||
| 66 | Details: | |
| 67 | https://en.wikipedia.org/wiki/1-Wire | |
| 68 | http://www.maxim-ic.com/datasheet/index.mvp/id/2827/t/al | |
| 69 | http://www.maxim-ic.com/app-notes/index.mvp/id/192 | |
| 70 | http://www.maxim-ic.com/datasheet/index.mvp/id/2983/t/al | |
| 71 | http://www.maxim-ic.com/app-notes/index.mvp/id/192 | |
| 72 | ||
| 73 | ||
| 74 | Logic analyzer setup | |
| 75 | -------------------- | |
| 76 | ||
| 77 | The logic analyzer used was a Saleae Logic (at 8MHz): | |
| 78 | ||
| 79 | Probe DS2480B pin | |
| 80 | ----------------------- | |
| 81 | 1 (black) 1-W | |
| 82 | ||
| 83 | The sigrok command line used was: | |
| 84 | ||
| 85 | sigrok-cli -d fx2lafw:samplerate=8mhz --time 5s -p 1=OWR -o <file> | |
| 86 |