AN4460 datasheet(9/54 Pages) STMICROELECTRONICS

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AN4460

Getting started with the STEVAL-ILL057V1 demonstration board

installed, the Windows device manager panel shows a new USB serial port (COMx)

device and the COM number associated.

Verify that the power supply output voltage is within the board specification.

Switch OFF the power supply.

Connect the power supply to the board and check the input polarity. Figure 2 illustrates

how to connect the power cables:

Figure 2. Power supply connection

Power on the board and check that the power supply current level is within the

appropriate levels.

Monitor the red status LED on the STEVAL-ILL057V1 demonstration board. During the

startup, the red status LED goes ON for few seconds before switching OFF. Should the

red status LED stay ON for more than 3 seconds, the STLUX385A device is indicating

a problem. The status LED should be checked after every step of the power-up

procedure. The STLUX385A indicates any issue encountered: short-circuit,

overcurrent, input power under the limit, etc. Note that, once the status LED is red, it

can only be switched OFF via the “co” console command.

Connect the USB TTL serial cable to the STEVAL-ILL057V1 board.

Run “Hyperterminal” or an equivalent program from the computer connected to the

USB TTL serial cable. The connection configuration is as follows:

–

Baud rate: 115200

–

Data bits: 8

–

Stop bits: 1

–

Parity: no

–

Flow control: no handshake

In order to verify that the connection is valid, type “?” and press ENTER. If the link is OK, the

STLUX385A list of commands is displayed.

10. Should the red status LED list a problem, use the “st” command and look at Table 3 on

page 36 to find the root of the problem.

11. Configure the LED string parameter via the “lc” (LED current) and “ln” (LED number)

commands. See Section 7.3 on page 28 for the command reference. Note that any

new setting is stored in Flash and is automatically used during the next startup.

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