TS-7180 TWI: Difference between revisions
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Revision as of 15:55, 3 March 2017
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-4100.
I2C 1 is internal to the TS-4100 and connects to the onboard Silabs supervisory microcontroller at 100khz; and to the onboard MT41T00S real-time clock (RTC).
| Address | Device |
|---|---|
| 0x4a | #Silabs |
| 0x68 | #RTC |
The second I2C bus is connected to the onboard FPGA. 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.