Advantech EH-7104G User manual

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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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