adesto SM2400-EVK2 Руководство пользователя - Страница 9

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5. ASCII Pass-through Using USB to TTL RS232 Adaptor with SM2400-EVK2

ASCII pass-through can also be tested using a USB to TTL RS232 adapter connected to the host interface connec-

tor P1 on the base board of the SM2400-EVK2 as described in the top portion of Figure 5 below.

The connection to the UART port is available on the SM2400-EVK2M base board on the header P1, where pin 5 is

external transmit, pin 4 is external receive, and pin 7 is ground as shown below.

This UART port can be connected either directly to the TTL-level UART port on the host device (if available), or to

a USB port via a USB-to-UART converter, also known as FTDI (Digikey Part No. 768-1204-ND). The latter method

of the connection is illustrated by Table 6 and Figure 5.

Table 6. Connecting the FTDI Device to the SM2400-EVK2 Base Board

Please note that the mini-USB cable and the FTDI cable can't be used at the same time.

Table 5. Factory Defaults

Parameter/Mode

UART baud rate

XXR

FTDI TTL-232R-RPi

RXD (Yellow cable)

TXD (Orange cable)

GND (Black cable)

Default

115200 (mode 15)

Modcod = 1

bitsPrBaud = 1

repetition = 4

Subc2200 = 30405060

Modcod = 0

BitsperBaud = 1

Repetitions = 4

ToneMap = 0x03F

Coherent = 1

Delimiter = 0

SM2400-EVK2 Base Board

EX_UART_RX

(Pin 4 of P1 Header)

EX_UART_TX

(Pin 5 of P1 Header)

GND

(Pin 7 of P1 Header)

SM2400 Serial-to-PLC Adapter User's Guide

UG-SM2400–-177A–-02/2019