AN4291 datasheet(32/53 Pages) STMICROELECTRONICS

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User interface

AN4291

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DocID024519 Rev 1

Figure 12. "pw" command

It reports the channel status (ON or OFF) and the TIM_Cnt counters for states S0, S1 and

S2, frozen at the moment when the command is invoked. The counters in S0, S1 and S2 are

based on the 964 MHz clock unit. The command also reports the dimming period ("D=32").

In this case, the value is the dimming period and starts from 1 (0.4%) and ends to 256

(100%).

7.4.8

vp - set VLED_PW simulated voltage

The command is used during the voltage compensation simulation phase ("au ch 1") to

change the simulated voltage read from the VLED_PW ADC pin. This command is enabled

only when the adaptive voltage compensation is disabled ("au ch 0" command).

Syntax: vp [ch] [voltage]

Parameters:

•

ch [0-3]: channel number

•

the parameter represents the new simulated voltage value, expressed as (real voltage /

0.05437489)

Output: none

Example: "vp 0 590": simulates the power voltage at 32.08 volt.

7.4.9

vc - set VCOMx simulated voltage

The command is used during the voltage compensation simulation phase ("au ch 1") to

change the simulated voltage read from the VCOMx ADC pin. This command is enabled only

when the adaptive voltage compensation is disabled ("au ch 0" command).

Syntax: vc [ch] [voltage]

Parameters:

•

ch [0-3]: channel number

•

voltage [0-1023]: same as the "vp" command

Output: none

7.4.10

wi - CPU load monitor and low power mode

The command enables the CPU load monitor where the CPU load can be observed via the

green LED on the demonstration board. The command also enables the STLUX385A low

power mode by using the WFI (wait for interrupt) instruction when idle. The "wi" command is

used to reduce the power consumption of the STLUX385A.

7.4.11

dm - dump memory

It displays the memory content of a specific area of memory.

Syntax: dm [add] [len]

AM16712v1

Led ch=0 on S0=156 S1=276 S2=939 D=32

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