MEN ME4, Руководство пользователя

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Getting Started
20ME04-00 E2

2020-02-25 Page 29
2.7.2 Configuring Wireless Functions
You can configure the following by accessing a configuration register on the SMBus:

Enable/disable power for a wireless interface card

Control user LEDs related to wireless interfaces
The smb2_ctrl tool included in the Windows ERTC/SMB Support Package (13Y021-70)
gives easy access to SMBus/I2C registers .
Usage Examples

Disable the power supply for a wireless interface card:

Activate a user LED:

See Chapter Accessing SMBus/I2C Devices for more info on the software tool.

See Chapter 4.1.1 User LED and Wireless Card Enable Register on page 40 for the
register description.
This example disables the LTE 1 module in a DIN-Rail system where ME4 is the first I/O
module.
- You need to read the current value before writing, so you can change only the desired
bit.
- The first I/O module has device address
0x4a
.
Read the current value of the configuration register:
> smb2_ctrl smb2_1 -a=0x4a rb
0xff
Write value
0xfe
to toggle only bit 0 in order to disable the modem.
> smb2_ctrl smb2_1 -a=0x4a wb -d=0xfe
This example enables the user LED 1 in a DIN-Rail system where ME4 is the first I/O
module.
- You need to read the current value before writing, so you can change only the desired
bit.
- The first I/O module has device address
0x4a
.
Read the current value of the configuration register:
> smb2_ctrl smb2_1 -a=0x4a rb
0xff
Write value
0xf7
to toggle only bit 3 in order to enable the user LED 1.
> smb2_ctrl smb2_1 -a=0x4a wb -d=0xf7