AN4460 datasheet(35/54 Pages) STMICROELECTRONICS

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AN4460

User interface

7.4.15

di - set global dimming value

It sets the dimming of the LED strings to be used when the board is operating in global

dimming mode (“ed 1"). At power-on the “di” value applied is 100 (equal to 100%) after

a ramp-up period only if “ed” command is enabled.

Syntax: di [value]

Parameters:



value [0,100]: the percentage of the value configured with the “ll” command. The global

dimming is applied to all channels.

Output: none

Example: “ll 0 220", “di 50". Channel 0 is dimmed at 220 at 50% = 110. All other channels

are dimmed at 50% of the their current dimming value.

7.4.16

ti - read time counter

It retrieves the time since the last power-up or reset.

Syntax: ti

Parameters: none

Figure 13. Console screen for “ti” command

Output: the time counter, in hexadecimal.

The output is composed of two parts, separated by the comma sign. The first part shows the

number of seconds elapsed since power-on or reset. The second part is the tick: a number

from 0 to 191 (in hex: 0x00 to 0xBF) that represents the number of dimming period elapsed.

One dimming period is exactly 5.1813 ms (193 Hz).

7.4.17

co - clear error

It clears any system error. This command clears (“off”) the error code, removes the OCP flag

monitored by the “st” command and switches OFF the fault LED. The command does not

clear the error counter tracked by the “st” command. The fault LED may remain switched

ON after the “co” command if the cause of error has not been removed.

Syntax: co

Parameters: none

7.4.18

hl - command help

It visualizes a brief description of the command selected.

Syntax: hl [command]

Parameters:



command: a terminal command

Output: the description of the command selected.

AM16713v1

Time is 0x00000098: 7d

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