Debug the sensors I²C signals¶
This technical note details how to debug the sensors I²C signals of the EXT4 extension board with a logic analyser.
The options are especially useful to check all the signals are correct when Defining a non-listed board or Migrating to another SDK, and to create a ticket for the help-desk .
The example uses the Saleae Logic Pro 8 with the application Logic 2 .
Configure¶
| Logic analyser Channel |
EXT4 board Pin |
EXT4 board Signal |
|---|---|---|
| 1 | 20 | HDC2080 interrupt |
| 2 | 19 | LIS2DH12 second interrupt |
| 3 | 18 | LIS2DH12 first interrupt |
| 4 | 17 | NT3H2111 field detect interrupt |
| 5 | 12 | Switch position |
| 6 | 15 | I²C clock signal |
| 7 | 14 | I²C data signal, bi-directional |
| 8 | 13 | WS2813C data signal |
| Ground | 10 | Ground |
Select the timer option and stop recording after 100 seconds.
Use¶
On the Saleae application, press the Capture button to start recording of the signals.
Launch the device under test.
Examples¶
Below, a 24-bit colour frame sent to the WS2813C RGB LED.
Below, the interrupt from the HDC2080 and the values acquisition.
