TS-4900 TWI
From embeddedTS Manuals
The i.MX6 supports standard I2C at 100khz, or using fast mode for 400khz operation. The CPU has 2 I2C buses used on the TS-4900.
I2C 1 is internal to the TS-4900 and connects to the RTC and FPGA.
| Address | Device |
|---|---|
| 0x28-0x2f | #FPGA |
| 0x57 | #NVRAM |
| 0x6f | #RTC |
The second I2C bus is brought out on CN2_28 (SCL) and CN2_30 (SDA). This bus has no devices except those added by the baseboard.
| 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.