| Table of Contents |
|---|
Using I2C in Linux
The Trizeps and Myon CPU modules may be configured to have multiple I2C busses.
Myon I
Pins | IO-Port | Driver Index | Description |
|---|---|---|---|
66,68 | I2C4 | 3 | typical connected to touch-controller |
119,121 | I2C6 | 5 | I2C devices |
Trizeps VII
Pins | Port | Driver Index | Description |
|---|---|---|---|
194,196 | I2C2 | 1 | primary I2C interface |
94,96 | I2C1 | 0 | secondary I2C interface |
The PMFP0100 PMIC (7-bit address 0x08) of the Trizeps VII is connected to the primary I2C interface.
Trizeps VIII
Pins | Port | Driver Index | Description |
|---|---|---|---|
194,196 | I2C2 | 1 | primary I2C interface |
94,96 | I2C1 | 0 | secondary I2C interface |
- | I2C3 | 2 | internal I2C interface |
The following devices are attached to the internal I2C interface:
7bit | 8bit | Description |
|---|---|---|
0x08 | 0x10 | PMFP0100 PMIC |
0x10 | 0x20 | MKV11 Kinetis MCU |
0x1A | 0x34 | WM8983 Audio Codec |
0x2C | 0x58 | MIPI to LVDS transceiver |
0x40 | 0x80 | FPGA primary config address |
0x41 | 0x82 | FPGA primary user mode |
0x42 | 0x84 | FPGA secondary user mode |
0x43 | 0x86 | FPGA primary config reset |
0x60 | 0xC0 | VDD_SOC regulatur |
Trizeps VIII Mini
Pins | Port | Driver Index | Description |
|---|---|---|---|
194,196 | I2C2 | 1 | primary I2C interface |
94,96 | I2C1 | 0 | secondary I2C interface |
- | I2C3 | 2 | internal I2C interface |
The following devices are attached to the internal I2C interface:
7bit | 8bit | Description |
|---|---|---|
0x10 | 0x20 | MKV11 Kinetis MCU |
0x1A | 0x34 | WM8983 Audio Codec |
0x2C | 0x58 | MIPI to LVDS transceiver |
0x40 | 0x80 | FPGA primary config address |
0x41 | 0x82 | FPGA primary user mode |
0x42 | 0x84 | FPGA secondary user mode |
0x43 | 0x86 | FPGA primary config reset |
0x4B | 0x96 | BD71847 PMIC |
Trizeps VIII Plus
Pins | Port | Driver Index | Description |
|---|---|---|---|
194,196 | I2C2 | 1 | primary I2C interface |
94,96 | I2C1 | 0 | secondary I2C interface |
- | I2C3 | 2 | internal I2C interface |
The following devices are attached to the internal I2C interface:
7bit | 8bit | Description |
|---|---|---|
0x10 | 0x20 | MKV11 Kinetis MCU |
0x1A | 0x34 | WM8983/WM8962B Audio Codec |
0x25 | 0x4A | PCA9450 PMIC |
0x40 | 0x80 | FPGA primary config address |
0x41 | 0x82 | FPGA primary user mode |
0x43 | 0x86 | FPGA primary config reset |
0x4A | 0x94 | WM8962B test functionality |
0x69 | 0xD2 | WM8962B test functionality |
0x78 | 0xF0 | ??? |
Myon II
Pins | Port | Driver Index | Description |
|---|---|---|---|
J70-66,68 | I2C2 | 1 | primary I2C interface |
J71-67,69 | I2C1 | 0 | secondary I2C interface |
J71-19,21 | I2C3 | 2 | internal I2C interface |
[J70-73,75] | I2C4 | 3 | special mounting option! |
The following devices are attached to the internal I2C interface:
7bit | 8bit | Description |
|---|---|---|
0x1A | 0x34 | WM8983 Audio Codec |
0x2C | 0x58 | MIPI to LVDS transceiver |
0x4B | 0x96 | BD71847 PMIC |
SBCSOM
Pins | Port | Driver Index | Description |
|---|---|---|---|
L.A04,A05 | I2C1 | 0 | left connector, i-MOD I2C, Mini-PCIe socket |
R.A04,A05 | I2C2 | 1 | right connector, camera , KuK-MODIS |
– | I2C3 | 2 | internal I2C interface |
The following devices are attached to the internal I2C interface:
7bit | 8bit | Description |
|---|---|---|
0x1A | 0x34 | WM8983 Audio Codec |
0x2C | 0x58 | MIPI to LVDS transceiver |
0x39 | 0x72 | HDMI transceiver |
0x49 | 0x92 | Secure Element |
0x4B | 0x96 | BD71847 PMIC |
0x50 | 0xA0 | EEPROM |
Use I2C from the Command Line
...
| Code Block |
|---|
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- 08 -- -- -- -- -- -- --
10: 10 -- -- -- -- -- -- -- -- -- 1a -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: 40 UU -- 43 -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: 60 -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
|
The '-y' option is used to prevent the 'Continue? [Y/n]' question.
'2' is the Driver-Index of the I2C3 interface.
The output shows the found I2C-devices. 'UU' indicates that a driver for this device has been loaded. In the above case it is a driver that communicates with the Trizeps VIII FPGA.
...