MEN G233 - User LEDs Control

Functional Description
20G233-00 E1

2017-10-20
Page 23
3.6.1 LED Control
The LEDs are controlled by the host CPU.
The host CPU sends a message with the LED configuration using the following byte
protocol:
 Select LED (1 Byte): 0b xxxx xxxx
 LED State (1 Byte): 0b xxxx xxxx
Example:
 Select LED 1 and LED 3 (1 Byte): 0b 0000 0101
 Turn on LED 1, turn off LED 3 (1 Byte): 0b 0010 0001
Table 5. User LED control – byte 1 – select LED
Table 6. User LED control – byte 2 – set LED state
Bit 7 6 5 4 3 2 1 0
Name
LED8 LED7 LED6 LED5 LED4 LED3 LED2 LED1
Bit Field Description
7:0 LED[8:1] Select the user LED to control
 0: Don’t select
 1: Select this LED
Bit 7 6 5 4 3 2 1 0
Name
LED8 LED7 LED6 LED5 LED4 LED3 LED2 LED1
Reset
00000000
Bit Field Description
7:0 LED[8:1] Set the user LED state for selected user LEDs
 0: LED off
 1: LED on
Only the state of the LEDs which were selected in byte 1 is
changed, the other LEDs keep their former state.