Advantech EH-7104G Manual de usuario

Advantech Confidential

Exclusively for Midoriya

EH-7104G Guide ver 1.doc 1 of 10 05/07/20

Midoriya Home Terminal (EH-7104G)

SI Guide

Version 1.1

1. Introduction

EH-7104-MD is an NS Geode GX1 CPU based Home Terminal. The product

featuring 10.4" LCD display, a built-in CCD camera and a handset is developed for a

Japanese customer, Midoriya. EH-7104-MD project is an ODM business that

Advantech defines the product specifications based on the customer’s Home

Automation system requirements and develops the electronics, mechanism and Win

CE 3.0 (Japanese version) embedded software kernel of the HT.

EH-7104-MD plays as the key of a rental apartment automation solution. It connects

the service/emergency calls and sensor signals of an apartment unit through the LAN

to the administration center. The handset of HT can pick up the door phone and

inter-phone calls through RS422 and analog audio signals.

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2. System Configuration

The block diagram of the EH-7104-MD based Home Automation environment is as

follows:

Advantech is in charge only for the Home Terminal. This diagram shows clearly the

interconnection of the EH-7104-MD, an I/O Box, Door Phone, Inter-Phones, Sensors

and service call actuators.

Home Terminal

Door Phone

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3. System Block Diagram

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4. External Connectors & I/O Mapping

4.1. External Connector & Terminals for RS-422 & Audio Signals

Stage RS-422 (COM2) Audio

TxD+ Pin1 Mic In Audio Jack

ES TxD- Pin2 DB9 Audio In RCA Jack

RxD+ Pin3 Audio Out RCA Jack

RxD- Pin4 (edge of the PCBA)

TxD+ Pin1 Mic In Pin1

CS TxD- Pin2 Terminals Audio In Pin2 Terminals

RxD+ Pin3 Audio Out Pin3

RxD- Pin4 GND Pin4

TxD+ Pin1 Audio In Pin1

MP TxD- Pin2 Terminals GND Pin2 Terminals

RxD+ Pin3 Audio Out Pin3

RxD- Pin4 GND Pin4

Remark: COM1 is assigned to the RS232C DB9 connector port.

4.2. BT878A GPIO Mapping

Port ID Pin Definition Active Logic Level

GPIO0 Reserved LED "1" (Turns LED on)

GPIO1 Intrusion LED "1"

GPIO2 Emergency Call LED "1"

GPIO3 Gas Leakage LED "1"

GPIO4 FireAlarm LED "1"

GPIO5 Water Leakage LED "1"

GPIO6 (Not Connected) -

GPIO7 Message LED "1"

GPIO8 Handset Hook Status TTL Input

GPIO9 Digital Input 1 TTLInput

GPIO10 Digital Input 2 TTLInput

GPIO11 Digital Input 3 TTLInput

GPIO12 Digital Input 4 TTLInput

GPIO13 Digital Input 5 TTLInput

GPIO14 Digital Input 6 TTLInput

GPIO15 Digital Input 7 TTLInput

GPIO16 Speaker Shut-Down "1" shut down

the speaker amplifier

GPIO17 Digital Output 1 TTLOutput

GPIO18 Digital Output 2 TTLOutput

GPIO19 Digital Output 3 TTLOutput

GPIO20 CCD_ON "1" (Turns on CCD Camera)

GPIO21 RDI1 "1"

GPIO22 RDI2 "1"

GPIO23 RDI3# "0"

Remark: Please look into the sample codes in the CD to get the device ID of BT878A.

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4.3. Audio Path Control Relay Switch Setting

Relay SW Selection Control

Audio Path Hook Switch

Status RDI3#

(GOIP23) RDI2

(GPIO22) RDI1

(GPIO21)

Door Phone <-> Handset Off Hook

SWhk ON 0

SW3 ON 0

SW2 OFF 0

SW1 OFF

Door Phone <-> HT On Hook

SWhk OFF 0

SW3 ON 1

SW2 ON 0

SW1 OFF

Handset <-> HT Off Hook

SWhk ON 1

SW3 OFF 0

SW2 OFF 1

SW1 ON

Default Setting On Hook

SWhk OFF 0

SW3 ON 0

SW2 OFF 0

SW1 OFF

Remark: SW3 is normal-closed type relay switch. It is ON by default after the

machine having been powered on.

4.4. AD1881/ALC200 Audio Codec Signals

Codec Pin Direction External Connection

MIC1 Input Built-in Mic

LINOUTR Output LINE OUT to the right channel of amplifier

circuit. Reserved for stereo music application.

LINOUTL Output LINE OUT (Door Phone & Handset)

Also through left channel of amplifier circuit

to Built-in Speaker

LINEINL Input LINE IN (Door Phone & Handset)

Remark: The AP program developer should control the LINOUTR, LINOUTL,

LINEINL and MIC1 of AD1881/ALC200 as well as the GPIO pins directly.

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5. Audio Signal Path Control

5.1. Operational Theory

The audio signals between the handset, the door phone, the built-in

Microphone/speaker and the Audio Codec (ALC-200 and AD1881) are controlled by

the GPIO pins (GPIO16, GPIO21, GPIO22 & GPIO23) and the Audio Codec signals

(LINOUTR, LINOUTL, LINEINL & MIC1).

When there is a call signal being sent from I/O Box via RS-422 port. The home

terminal will beep to inform the user to pick up the Door Phone or Inter-phone calls.

9If the Handset is on-hooked the door/inter phone audio signals will be connected

to the microphone/speaker of the home terminal. The user can press a soft key

on the touch screen to answer the in-coming calls via the microphone/speaker.

9If the Handset is off-hooked, the door/inter phone audio signals are connected

directly to the handset. The user can just pick up the handset to answer the call

directly.

When the user would like to record or play messages from the home terminal, AP

program should show a soft key. The user can

9Press down the soft key to use built-in microphone/speaker, or

9Pick up handset for message recording and playback.

5.2. Home Terminal Built-in Mic/Speaker Operation

Relay SW Selection Control

Audio Path Hook Switch

Status RDI3#

(GOIP23) RDI2

(GPIO22) RDI1

(GPIO21)

Default Setting after POR On Hook

SWhk OFF 0

SW3 ON 0

SW2 OFF 0

SW1 OFF

Audio Code Signal Status

MIC1 Enabled to get the voice from built-in microphone.

LINOUTR Enabled. Be routed to the right channel of amplifier. Reserved

for stereo application.

LINOUTL Enabled. Be routed trough the left channel of amplifier to the

built-in speaker.

LINEINL Disabled.

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BT878A

Port ID State

GPIO16 "0" Turn on built-in speaker amplifier.

After the machine has been powered on, the SW3 is ON and SW2 & SW3 are OFF.

Without picking up the handset, the user can record the voice using the built-in

microphone and then play it from the built-in speaker.

The Audio Record & Play program have to control the MIC1 of Audio Codec to get

the digitized microphone input. And the voice data have to be sent to the LINOUTL

output signal of Audio Codec. Please make sure GPIO16 is at "0" to turn on the

amplifier of built-in speaker.

The internal loop-back paths of ALC-200 or AD1881 mixer circuitry will route the

received voice data from MIC1 to LINOUTL and make the user hear voices from

built-in speaker.

5.3. Voice Communication between Door Phone and Handset

Relay SW Selection Control

Audio Path Hook Switch

Status RDI3#

(GOIP23) RDI2

(GPIO22) RDI1

(GPIO21)

Door Phone <-> Handset Off Hook

SWhk ON 0

SW3 ON 0

SW2 OFF 0

SW1 OFF

Audio Code Signal Status

MIC1 Disabled.

LINOUTR Disabled.

LINOUTL Disabled. The SW2 will also isolate this signal from the

handset signals.

LINEINL Disabled. The SW2 will also isolate this signal from the

handset signals.

BT878A

Port ID State

GPIO16 "1" shut down speaker amplifier.

Remark: The Hook switch controls the power of the amplifier circuits for handset

Microphone and Ear Speaker.

The default usage of handset is to pick up the Door/Inter Phone calls being routed

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After the machine has been powered on, the SW3 is ON and SW2 & SW3 are OFF.

The Audio In and Audio out signals from I/O Box are routed to the handset.

Without any program control, the user can pick up the handset from its hook position

to answer the Door/Inter Phone calls from I/O Box.

5.4. Communication between Handset andAudio Codec

Relay SW Selection Control

Audio Path Hook Switch

Status RDI3#

(GOIP23) RDI2

(GPIO22) RDI1

(GPIO21)

Handset <-> HT Off Hook

SWhk ON 1

SW3 OFF 0

SW2 OFF 1

SW1 ON

Audio Code Signal Status

MIC1 Disabled.

LINOUTR Disabled.

LINOUTL Enabled. Send the voice data to ear speaker of handset.

LINEINL Enabled. Get the voice data from handset microphone.

BT878A

Port ID State

GPIO16 "1" shut down speaker amplifier.

When in this mode, the SW3 needs to be turned off by setting the GPIO23 to be "1",

SW2 is kept off and SW1 must be turned on by setting GPIO21 to be "1". The voice

being recorded by the microphone of handset will be sent to the Audio Code through

LINEINL pin. The voice data being played is sent from the LINOUTL pin of Audio

Codec to the ear speaker of handset.

There is an internal voice loop-back in between the microphone and the ear speaker of

the handset. This feature enables the user to hear what he speaks while speaking. The

built-in speaker should be turned off by setting the GPIO16 to be "1".

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5.5. Communication between Built-in Microphone/Speaker and Door Phone

Relay SW Selection Control

Audio Path Hook Switch

Status RDI3#

(GOIP23) RDI2

(GPIO22) RDI1

(GPIO21)

Door Phone <-> HT On Hook

SWhk OFF 0

SW3 ON 1

SW2 ON 0

SW1 OFF

Audio Code Signal Status

MIC1 Enabled. Get the recorded voice data from the built-in

Mic.

LINOUTR Enabled. Will be used when using stereo speakers.

LINOUTL Enabled. Send the voice data to Door/Inter Phone through

I/O Box and play the voice from Door/Inter Phone on the

built-in speaker.

LINEINL Enabled. Get the voice data of Door/Inter Phone through

I/O box.

BT878A

Port ID State

GPIO16 "0" turn on speaker amplifier.

The voice signal from the door phone is routed to the LINEINL pin of the Audio

Codec and must be sent through LINOUTL to the built-in microphone immediately

for playing the voice. The voice being recorded by the built-in microphone will be got

from the MIC1 pin and then sent to LINOUTL without delay. The internal mixer

circuitry of Audio Codec handles the audio signal routing between LINEINL and

LINOUT as well as that between MIC1 and LINOUTL automatically.

6. Audio Codec Control Registers

The EH-7104-MD BIOS provides a Sound Blaster (SB16) compatible

interface for the AP program to configure the Audio Codec in a simplified

way. Whenever there is Codec IC change, the BIOS will be modified to

handle the details of the Codec controls and keep the same interface for

AP programs. This makes it not necessary to change the AP program due

to the hardware change.

The AP program must first send to Port 224 H an 8-bit address of the

control register whose content will be changed. Then, send to Port 225H

the updated content of the control register.

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The Address Mapping and the allowable range of content for the control

registers are shown as in the following table:

These Control Registers control mainly the internal Mixer functions of

the Audio Codec. To configure the paths of the audio signals, AP must set

up the switches of Mixer inputs and outputs via control registers, 3C, 3D

and 3E. To get optimized loudness of the voices from different sources,

the control registers, 30, 31, 32, 33, 38, 39 and 3A must be set to suitable

values.

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