TS-4100 I2C: Difference between revisions
From embeddedTS Manuals
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Revision as of 16:27, 27 October 2017
The i.MX6UL supports standard I2C at 100khz, or using fast mode for 400khz operation. The CPU has 2 I2C buses used on the TS-4100.
I2C 1 is internal to the TS-4100 and connects just to the onboard Silabs supervisory microcontroller at 100khz.
| Address | Device |
|---|---|
| 0x4a | Silabs |
The second I2C bus is brought out on CN2_28 (SCL) and CN2_30 (SDA). This is shared with the onboard FPGA and it goes offboard. This bus also runs at 400khz by default.
| Address | Device |
|---|---|
| 0x28-0x2f | FPGA |
| Note: | It is also possible to request the kernel to bitbang additional I2C buses as needed. See an example here. |
The kernel makes the I2C available at /dev/i2c-#. You can use the i2c-tools (i2cdetect, i2cget, i2cset), or you can write your own client.