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https://github.com/RobTillaart/MultiSpeedI2CScanner
Arduino I2C scanner that scans all addresses at multiple speeds.
https://github.com/RobTillaart/MultiSpeedI2CScanner
arduino i2c scanner
Last synced: about 1 month ago
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Arduino I2C scanner that scans all addresses at multiple speeds.
- Host: GitHub
- URL: https://github.com/RobTillaart/MultiSpeedI2CScanner
- Owner: RobTillaart
- License: mit
- Created: 2020-05-18T17:40:00.000Z (over 4 years ago)
- Default Branch: master
- Last Pushed: 2024-07-14T08:47:33.000Z (6 months ago)
- Last Synced: 2024-11-19T06:33:26.714Z (about 1 month ago)
- Topics: arduino, i2c, scanner
- Language: C++
- Homepage:
- Size: 33.2 KB
- Stars: 18
- Watchers: 2
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Funding: .github/FUNDING.yml
- License: LICENSE
Awesome Lists containing this project
README
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[](https://github.com/RobTillaart/MultiSpeedI2CScanner/actions/workflows/arduino-lint.yml)
[](https://github.com/RobTillaart/MultiSpeedI2CScanner/actions/workflows/jsoncheck.yml)
[](https://github.com/RobTillaart/MultiSpeedI2CScanner/issues)
[](https://github.com/RobTillaart/MultiSpeedI2CScanner/blob/master/LICENSE)
[](https://github.com/RobTillaart/MultiSpeedI2CScanner/releases)
```
not used.
[](https://registry.platformio.org/libraries/robtillaart/MultiSpeedI2CScanner)
```
# Arduino MultiSpeed I2C Scanner
## Version: 0.1.17
## Description
MultiSpeedI2CScanner is a menu driven I2C scanner, see below.
The scanner is tested on an UNO and an ESP32.
The scanner provides an overview of which addresses can be found
at which speed. This allows one to optimize the I2C performance of
many devices above the standard 100KHz speed.
#### Related
build your own I2C scanner with:
- https://github.com/RobTillaart/I2C_SCANNER
## Menu dialog
```
Arduino MultiSpeed I2C Scanner - 0.1.15
I2C ports: 1 Current: Wire0
@ = toggle Wire - Wire1 - Wire2 [TEENSY 3.5 or Arduino Due]
Scan mode:
s = single scan
c = continuous scan - 1 second delay
q = quit continuous scan
d = toggle latency delay between successful tests. 0 - 5 ms
i = toggle enable/disable interrupts
Output:
p = toggle printAll - printFound.
h = toggle header - noHeader.
a = toggle address range, 0..127 - 8..119 (default)
Speeds:
0 = 100..800 KHz - step 100 (warning - can block!!)
1 = 100 KHz
2 = 200 KHz
4 = 400 KHz
9 = 50..400 KHz - step 50 < DEFAULT >
!! HIGH SPEEDS - WARNING - can block - not applicable for UNO
8 = 800 KHz
M = 1000 KHz
N = 3400 KHz
O = 5000 KHz
P = 100 400 1000 3400 5000 KHz (standards)
r = reset to startup defaults.
? = help - this page
```
## Functions
### I2C ports
**@** selects through the different Wire ports.
Note that the current Wire port is given after I2C ports: count
Wire0 is just Wire but it was easier to program.
### Scan mode
**s** selects single scan mode, think of it as manual.
**c** selects continuous scanning, think of it as automatic.
**q** quits the continuous scan mode.
**d** toggles the latency between successful scans.
Only needed sometimes.
**i** toggles disable/enable interrupts, use with care.
### Output selection
**p** toggles printAll and printFound.
PrintAll will print also the addresses where nothing is found.
PrintFound will only generate a line if an I2C device is found on that address.
**h** toggles the printing of a header.
**a** toggles the range of addresses scanned, default the range 8 .. 119 is scanned,
but one can extend this range to 0 .. 127. **Note:** some addresses are reserved.
### Speeds
All options here select a single speed or a range of speeds.
Since 0.1.10 version experimental speeds of 1000, 3400 and 5000 are added as
these are part of the I2C standards.
http://i2c.info/i2c-bus-specification
NOTE: not all processors will support these higher speeds.
This can show up as blocking or it can even look like it is working.
Check your datasheet to see which speeds are applicable for the processor in use.
## Future
#### Must
- update documentation
- test on RP2040
#### Should
#### Could
- add watchdog reset (at least AVR - 8 seconds 0.2.0 )
- non-AVR command behind a ```#ifdef``` ?
- rename releaseNotes.md to changelog.md (in line with libraries)
- I2C GENERIC RESET address 0x00 CMD 0x06
#### Wont
## Support
If you appreciate my libraries, you can support the development and maintenance.
Improve the quality of the libraries by providing issues and Pull Requests, or
donate through PayPal or GitHub sponsors.
Thank you,