Dacu

Info Box Applies to Dacu Applies to Lizard Applies to Android

Introduction

Dacu is an ARM Cortex-A8 industrial tablet platform, built around a carrier board hosting the Lizard CPU module. The main system specifications are the following:

Microprocessor	ARM Cortex-A8 @ 500 MHz
Power	12-24 V
Serial Ports	1x UART RS232 on DB9 1x UART (RS232/RS422/RS485) or CAN on DB9 (hardware mount options) 1x UART RS232 on pin strip (debug port)
Ethernet	1x Fast Ethernet on RJ45 connector
Display	7" 800x480 LVDS
Storage	1x microSD slot
USB	1x USB Host full speed port 1x USB Host high speed port
Audio	UDA1345 codec
Buses	I2C SPI
Other	On board touch controller Optional Wi-Fi module GPIOs

Block Diagram

The following picture shows block diagram of Dacu:

Mechanicals

The following picture shows the mechanical layout of Dacu:

Connectors pinout

The following section describes the on-board connectors and their pinout.

Power supply

Power is provided through the JP2 DC Power Jack. Power voltage range is [12-24 V]

Lizard module connectors – J1, J2

J1 and J2 are the mating connectors for Lizard CPU module.

UART1 - J4

J4 is a standard DB9 connector for the RS232 four-wires UART1 port. The following table reports the connector's pinout:

Pin#	Pin name	Function	Notes
1, 4, 6, 9	N.A.	N.A.	Connected to protection diode array
2	UART_EXT_RX	Receive line
3	UART_EXT_TX	Transmit line
5	DGND	Ground
7	UART_EXT_RTS	Request To Send line
8	UART_EXT_CTS	Clear To Send line

UART2/CAN - J5

J5 is a standard DB9 male connector for the configurable UART/CAN port. The board provides some hardware mount options for the selection of the UART mode (RS232/RS422/RS485 with auto-direction) or the CAN mode. The board default configuration provides the CAN interface on this port, while the RS232/RS422/RS485 interface is provided as an option to customers who choose the alternative configuration.

The following table reports the connector's pinout:

Pin#	Pin name	RS232 mode	RS422 mode	RS485 mode	CAN mode	Notes
1	N.A./Reserved	Not connected	Not connected	Not connected	Reserved
2	UART2_A/CAN_M	UART2 rx line	Not connected	Not connected	CAN bus low signal
3	UART2_Y/CAN_GND	UART2 tx line	Inverting driver output	Inverting driver output	CAN bus GND
4	N.A./Reserved	Not connected	Not connected	Not connected	Reserved
5	DGND/CAN_SHIELD	Ground	Ground	Ground	CAN bus shield (Optional)
6	N.A./GND	Not connected	Not connected	Not connected	Ground (Optional)
7	UART2_Z/CAN_P	UART2 Request To Send	Noninverting driver output	Noninverting driver output	CAN bus high signal
8	UART2_B/Reserved	UART2 Clear To Send	Not connected	Not connected	Reserved
9	5V_BT/CAN_V+	5V for bluetooth	5V for bluetooth	5V for bluetooth	CAN bus Power (Optional)

Configuration Jumpers J26 e J27

When the board is configured to provide the UART2 interface through the J5 connector, the J26 and J27 jumpers are used to configure the UART mode, as reported below:

Jumper	RS232 mode	RS422 mode	RS485 mode
1-3	open	open	closed
5-7	open	closed	open
9-11	open	closed	open
2-4	open	open	closed
6-8	open	closed	closed
10-12	open	closed	closed
13-15	open	open	closed
14-16	open	open	closed

UART3 - J25

J25 is a 10 pin (5x2x2.54mm) header connector. The following table reports the connector's pinout:

Pin#	Pin name	Function	Notes
1, 2, 4, 6, 7, 8, 10	N.A.	N.C.	Not connected
3	UART3_RX	Uart Receive line
5	UART3_TX	Uart Transmit line
9	DGND	Ground

Ethernet port - J6

J6 is a standard RJ45 connectors connected to the Lizard integrated ethernet controller and PHY.

Pin#	Pin name	Function	Notes
1	ETH_CTTD	Center Tap TX
2	ETH_TX+	Eth transmit data +
3	ETH_TX-	Eth transmit data -
4	ETH_RX+	Eth receive data +
5	ETH_RX-	Eth receive data -
6	ETH_CTRD	Center Tap RX
7	DGND	Ground
8	ETH_LED2	Eth speed led
9	DGND	Ground
10	ETH_LED1	Eth activity led

LCD LVDS connector - J8

J8 is a Hirose (cod. DF13A-20DP-1.25V) double row 1.25mm pitch miniature crimping connector. The following table reports the connector's pinout:

Pin#	Pin name	Function	Notes
1, 2	3.3V_LCD	3.3 V
3, 4, 7, 10, 13, 16, 19	DGND	Ground
5	LCD_LVDS_D0-	LVDS Data 0 -
6	LCD_LVDS_D0+	LVDS Data 0 +
8	LCD_LVDS_D1-	LVDS Data 1 -
9	LCD_LVDS_D1+	LVDS Data 1 +
11	LCD_LVDS_D2-	LVDS Data 2 -
12	LCD_LVDS_D2+	LVDS Data 2 +
14	LCD_LVDS_CLK-	LVDS clock -
15	LCD_LVDS_CLK+	LVDS clock +
17	LCD_P17	Backlight PWM	Connected to LCD_BKLT_PWM
18	LCD_P18		Connected to 5V_LCD
20	LCD_P20		Connected to ground
21, 22	LVDS_SHIELD	LVDS shield

LCD Ziff connecor - J7

J7 is an optional connector for an Ampire AM-800480STMQW-TB0 7" 800x480 display. The following table reports the connector's pinout:

Pin#	Pin name	Function	Notes
1, 2, 9, 13, 17, 21, 25, 39, 40	DGND	Ground
3	LCD_PCLK	LCD Pixel clock
4	LCD_IRQ
5	TSC_YP
6	LCD_R0
7	LCD_R1
8	LCD_R2
10	LCD_R3
11	LCD_R4
12	LCD_R5
14	LCD_G0
15	LCD_G1
16	LCD_G2
18	LCD_G3
19	LCD_G4
20	LCD_G5
22	LCD_B0
23	LCD_B1
24	LCD_B2
26	LCD_B3
27	LCD_B4
28	LCD_B5
29	TSC_YM
30	TSC_XM
31	TSC_XP
32	LCD_DE
33, 34	3.3V_LCD
35, 36, 37	5V_LCD
38	LCD_BKLT_PWM

Touch screen connecor - J28

J28 is a 1.0mm pitch 4-pin ZIF connector. The following table reports the connector's pinout:

Pin#	Pin name	Function	Notes
1	TSC_YP	Touch controller Y+
2	TSC_XP	Touch controller X+
3	TSC_YM	Touch controller Y-
4	TSC_XM	Touch controller X-

MicroSD slot - J12

J12 is a Micro-SD card header. The following table reports the connector's pinout:

Pin#	Pin name	Function	Notes
1	MMC1_DAT2
2	MMC1_DAT3
3	MMC1_CMD
4	MMC_3.3V
5	MMC1_CLK
6	DGND
7	MMC1_DAT0
8	MMC1_DAT1
9, 11	SD_SHIELD
10, 12	MMC1_DAT5

SDIO slot (DWM module) - J14

J14 is a Molex dual row 0.50mm pitch SlimStack™ receptacle. The following table reports the connector's pinout:

Pin#	Pin name	Function	Notes
1, 2	5V
3, 4	3.3V
5, 6, 9, 10, 19	DGND
7	MMC2_CMD
8	MMC2_CLK
11	MMC2_DAT0
12, 14, 16, 18, 20, 22	N.C.	Not connected
13	MMC2_DAT1
15	MMC2_DAT2
17	MMC2_DAT3
21	UART2_RX		Mount option
23	UART2_CTS		Mount option
24	BT_F5		Connected to DSS_DATA20/DSI_DY1
25	UART2_TX		Mount option
26	BT_F2		Connected to DSS_DATA21/DSI_DX1
27	UART2_RTS		Mount option
28	WIFI_IRQ		Connected to DSS_DATA22/DSI_DY2
29	BT_EN		Connected to DSS_DATA19/DSI_DX0
30	WIFI_EN		Connected to DSS_DATA23/DSI_DX2

USB ports - J15

J15 is a stacked, dual port USB Type A connector.

USB port 0 (high speed)

USB port 0 is mapped on the lower USB connector. The following table reports the connector's pinout:

Pin#	Pin name	Function	Notes
B1	5V_USBH_0	5V
B2	USB0_DM	USB0 Data -
B3	USB0_DP	USB0 Data +
B4	DGND_USBH_0		Ground

USB port 1 (full speed)

USB port 1 is mapped on the higher USB connector. The following table reports the connector's pinout:

Pin#	Pin name	Function	Notes
A1	5V_USBH_1	5V
A2	USBM1	USB0 Data -
A3	USBP1	USB1 Data +
A4	DGND_USBH_1	Ground

I2C bus - J18

J18 is a 8-pin 1.25mm pitch vertical header. The following table reports the connector's pinout:

Pin#	Pin name	Function	Notes
1, 5	DGND	Ground
4, 8	3.3V	3.3 V
2	I2C2_SDA	I2C #2 data
3	I2C2_SCL	I2C #2 clock
6	I2C3_SDA	I2C #3 data
7	I2C3_SCL	I2C #3 clock

GPIO - J19

J19 is a 8-pin 1.25mm pitch vertical header. The following table reports the connector's pinout:

Pin#	Pin name	Function	Notes
1, 8	DGND	Ground
2	MCBSP1_CLKX	GPIO
3	MCBSP1_DX	GPIO
4	MCBSP1_FSX	GPIO
5	MCBSP3_DR	GPIO
6	MCBSP3_FSX	GPIO
7	MCBSP4_DR	GPIO

SPI bus - J20

J20 is a 8-pin 1.25mm pitch vertical header. The following table reports the connector's pinout:

Pin#	Pin name	Function	Notes
1	DGND	Ground
2	MCSPI1_CLK	SPI1 clock
3	MCSPI1_CS0	SPI1 chip select #0
4	MCSPI1_CS1	SPI1 chip select #1
5	MCSPI1_CS2	SPI1 chip select #2
6	MCSPI1_SOMI	SPI1 slave output master input
7	MCSPI1_SIMO	SPI1 slave input master output
8	3.3V	3.3 V

Audio - J21

J21 is a 8-pin 1.25mm pitch vertical header. The following table reports the connector's pinout:

Pin#	Pin name	Function	Notes
1	AUD_PW2	Audio amplifier VO 2
2	AUD_PW1	Audio amplifier VO 1
3, 5, 7	DGND	Ground
4	LINEOUT_R	Audio coded lineout right
6	LINEOUT_L	Audio coded lineout left
8	MIC_INPUT	Microphone input

JTAG - J16

J16 is a standard 20-pin 2.54mm pitch header connector (bottom side). The following table reports the connector's pinout:

Pin#	Pin name	Function	Notes
1, 2	3.3V	3.3 V
3	JTAG_TRSTn
5	JTAG_TDI
7	JTAG_TMS
9	JTAG_TCK
11	JTAG_RTCK
13	JTAG_TDO
15	JTAG_RST#		Connected to MRSTn
4, 6, 8, 10, 12, 14, 16, 18, 20	DGND	Ground
17, 19	N.A.	Not connected

Software and hardware usage notes

Supported peripherals

• Bootloader: U-Boot
• Linux version: 2.6.32
• Drivers list:
  • NOR flash
  • NAND flash
  • Ethernet
  • LCD controller - AM800480STM display (LVDS version)
  • Backlight PWM
  • UART RS232/RS485/RS422
  • CAN
  • SPI
  • I2C
  • GPIOs
  • USB Host
  • MMC/SD/SDIO
  • Resistive touch screen
  • RTC
  • UDA1374 audio codec
  • 1-Wire
  • INA226 sensors

Bootloader	U-Boot
Linux version	2.6.32
Drivers list	NOR flash
	NAND flash
	Ethernet
	LCD controller - AM800480STM display (LVDS version)
	Backlight PWM
	UART (RS232/RS485/RS422)
	CAN
	SPI
	I2C
	USB Host
	MMC/SD/SDIO
	Resistive touch screen
	RTC
	UDA1374 audio codec
	1-Wire
	INA226 sensors

Linux quick start

To run Linux on the board, please follow the steps reported below:

1. connect the serial cable, provided with the board, to J3 pin-strip connector
2. connect this cable to PC COM port through a NULL-modem cable (not provided)
3. start your favourite terminal software on PC; communication parameters are:
   • baud rate: 115200 Bps
   • data bits: 8
   • stop bits: 1
   • parity: none
4. connect the system to Ethernet LAN (RJ45 connector, J6)
5. connect a 12Vcc power supply to to the power jack (JP2)

Once power has been applied, U-Boot bootloader will be executed and the following messages will be printed on serial console:

U-Boot 2009.11-00074-g34e0d5b-dirty (Jul 17 2012 - 11:00:55) [dacu-android-0.9.2]

AM35xx-GP ES2.0, L3-165MHz
DAVE Lizard board + LPDDR/NAND
I2C:   ready
DRAM:  256 MB
Flash: 32 MB
NAND:  1024 MiB
In:    serial
Out:   serial
Err:   serial
Die ID #7cf60001000000000160ae2d0b01e00a
Net:   davinci_emac_initialize
Ethernet PHY: GENERIC @ 0x11
DaVinci EMAC                                                                                                       
Hit any key to stop autoboot:  0                                                                                   
=>

Please note that you need to modify some u-boot environment variables before running the net_nfs configuration and start Linux. For further information, please refer to Configuration net_nfs.

Android quick start

This section describes how to quick start Android operating system on Dacu.

"Full control" mode

1. connect the serial cable, provided with the board, to J3 pin-strip connector
2. connect this cable to PC COM port through a NULL-modem cable (not provided)
3. start your favourite terminal software on PC; communication parameters are:
   • baud rate: 115200 Bps
   • data bits: 8
   • stop bits: 1
   • parity: none
4. connect the system to Ethernet LAN (RJ45 connector, J6)
5. connect a 12Vcc power supply to to the power jack (JP2)

Once power has been applied, U-Boot bootloader will be executed and the following messages will be printed on serial console:

U-Boot 2009.11-00074-g34e0d5b-dirty (Jul 17 2012 - 11:00:55) [dacu-android-0.9.2]

AM35xx-GP ES2.0, L3-165MHz
DAVE Lizard board + LPDDR/NAND
I2C:   ready
DRAM:  256 MB
Flash: 32 MB
NAND:  1024 MiB
In:    serial
Out:   serial
Err:   serial
Die ID #7cf60001000000000160ae2d0b01e00a
Net:   davinci_emac_initialize
Ethernet PHY: GENERIC @ 0x11
DaVinci EMAC                                                                                                       
Hit any key to stop autoboot:  0                                                                                   
=>

Once the boot process has completed, you'll get the default Android "desktop":

Android default lock screen

Moreover, you'll have immediate access to the Android shell, so you can use the shell commands to interact with the system and see the output messages on the console. Using the serial console doesn't prevent you from using also the adb tool to access the system.

"Normal" mode

1. connect the system to Ethernet LAN (RJ45 connector, J6)
2. connect a 12Vcc power supply to to the power jack (JP2)

Once power has been applied, the system will boot loading the software components from the internal flash. Once the boot process has completed, you'll get the default Android "desktop":

You can now access the system using adb.

Default IP address

The default IP address is 192.168.0.122

Running the Android Debug Bridge (ADB)

ADB is a fundamental development tool and enables remote access to the Android device. ADB is provided with the Android SDK, so before using it you must install the SDK.

To establish the ADB connection, on a Linux host machine open a shell and launch the following commands:

$ export PATH=${PATH}:<your_sdk_dir>/platform-tools
$ export ADBHOST=<target's ip address>
$ adb kill-server
$ adb start-server

On a Windows host machine, open a shell and launch the following commands:

adb tcpip 5555
adb connect <target's ip address>:5555
adb kill-server
adb start-server

To check the connection, please launch

$ adb devices 

If everything is working properly, you should see the following messages:

$ adb devices
List of devices attached
emulator-5554    device

You can open a remote shell using the following command:

$ adb shell

To install an application (in .apk format), you can use the following commmand:

$ adb install <path to apk>

Useful Links

Video: Android Multitouch demo on Dacu

Android Debug Bridge