Frequently Asked Questions and Their Answers

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Frequently Asked Questions and Their Answers

ISEE/IGEP Common Questions

Which IGEP board do I have ?

If you read silkscreen...











IGEP v1 hardware related questions

Which revision is my IGEPv1 board?

These platforms are ISEE boards based on ARM9 ARM processor. They are developed for very cheap custom designs under project agreement.

IGEP v1 software related questions

igep_core

ISEE software framework to develop applications.










IGEP v2 hardware related questions

Is it possible to connect a battery to maintain the real time clock in the board?

Battery backup is not implemented on IGEP v2 RA and RB.

User can use i2c external rtc or connect externally a super-cap/rechargable battery on R768 pins.

R768 is 0 Ohm resistor connected between GND and BKBAT (M14) input from TPS65950.

How is it connected Bluetooth chipset to OMAP ?

UART2.

How many UARTs are available?

OMAP3 has 3 UARTS:

UART1 --> RS485 on connector J940
UART2 --> bluetooth
UART3 --> debug console on connector J960

All of this UART are also available on other connectors:

UART1 --> on connector JA41 without DVI transceiver with CMOS 1v8 logic.
UART1 --> on connector J940 with CMOS 3V3 logic
UART2 --> on expansion connector J990 without bluetooth feature.
UART3 --> on connector JA41 without DVI transceiver with CMOS 1v8 logic.

Is it available s-video or video composite output?

A dual-display interface equips the OMAP3530/25 processor. This display subsystem provides the necessary control signals to interface the memory frame buffer directly to the external displays (TV-set).

Two (one per channel) 10-bit current steering DACs are inserted between the DSS and the TV set to generate the video analog signal. One of the video DACs also includes TV detection and power-down mode. For more information, see the DSS chapter of the OMAP35x Technical Reference Manual.

IGEP v2 board hasn't s-video or video composite output connector, but there are available on the board some test points to implement a fully-functionaly s-video output.

Is it possible to config the wireless LAN and bluetooth so they are completely off, and not consuming any power at all?

Yes, powerdown and reset are implemented on GPIO_94 and GPIO_95.

Could you attach an LCD with LDVS interface?

You have to translate it to LVDS which is a differential and serialized interface. For example you can use MAX9213 serializer LVDS to translate the parallel interface to LVDS.

Is there a way to attach a VGA monitor directly?

You can use DVI to VGA converter connected to DVI output.

Is it possible to connect a CMOS sensor (ie are the camera signals available on a board connector)?

The camera signals are not available on IGEP v2 board.

Mini usb OTG must be a MINI A Male?

Review the Hardware Reference Manual: Page7: USB 2.0 LS/FS/HS OTG 1 Mini AB USB socket connector (dual slave and host role) – That means you can use MINI-A and MINI-B cable.

I would like too to know if the external wifi antena is easy to install? Where can I acquire a compatible external antenna?

On IGEP0020-RB boards:

The JD11 is a GSC connector for the external Wifi interface. It is a MURATA GSC connector, Part number MM9329-2700RA1.

You only have to find a cable that fits with this MURATA connector.

Regarding the antenna, just need a 2.4Ghz Antenna. 

On IGEP0020-RC boards:

The JD11 is a "HRS (HIROSE) - U.FL-R-SMT(01) - RECEPTACLE, SMT, U.FL " connector

A popular Hirose U.FL (MHF IPEX) connector to SMA-RP (reverse polarity) connector cable fits in

On IGEP-MODULE boards:

The J2 is a "HRS (HIROSE) - U.FL-R-SMT(01) - RECEPTACLE, SMT, U.FL " connector

A popular Hirose U.FL (MHF IPEX) connector to SMA-RP (reverse polarity) connector cable fits in


Is it possible to add analog video output?

Yes it is possible. There is no connector for S-video, but signals are available on board test points.

TP400 and TP401 which are located on bottom side, belongs to luminance and chroma so:
TP401 = TVOUT_1R sch signal = PIN 3 S-video connector = Y = luminance
TP400 = TVOUT_2R sch signal = PIN 4 S-video connector= C = chroma

Which revision is my IGEPv2 board?

At this moment (2010-December):

  • IGEPv2 (Revision A): ISEE board based on CORTEX A8 ARM processor (only few premium costumers have these version boards).
  • IGEPv2 (Revision B): ISEE board based on CORTEX A8 ARM processor (its have silkscreen "IGEP0020-RB1" on board and are from the years 2009 to 2010 years)
  • IGEPv2 (Revision C): ISEE board based on CORTEX A8 ARM processor (its have silkscreen "IGEP0020-RC" on board and are from the year 2010)


Is it possible to power using USB OTG connector?

No, it is not possible.

What is the maximun power consumption?

The power consumption of IGEPv2@600Mhz is between 690 and 720mA

The power consumption of IGEPv2@720Mhz is between 750 and 780mA.

IGEP v2 720MHz has aprox. 15% more power consumption on core and mpu_iva than 600MHZ.

What about "Skip erase bad block 124 at 0xf80000" means at bootlog?

Flash devices (nandflash or onenand or ...) have been factory marked with bad blocks. 
New bad blocks could appear along flash life, and you should mark
them (or JFFS2 file-system does automatically ).

What is the max Ethernet throughput with LAN9221i?

The ethernet throughput it's 94-96 M/bits second, LAN9221i it's connected direcly to OMAP processor addressable space and dedicated IRQ (no USB, SPI, converters ...).

# iperf -c 192.168.3.2
------------------------------------------------------------
Client connecting to 192.168.3.2, TCP port 5001
TCP window size: 25.4 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.3.100 port 59439 connected with 192.168.3.2 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 113 MBytes 94.6 Mbits/sec

Boot up sequence

  1. OMAP3 ROM Boot with IGEPv2 hardware configuration (sys_boot[6..0]=0110000) tries to load x-loader from ...
    1. USB
    2. UART3
    3. MMC1
    4. OneNAND
  2. X-loader (Flash or microSD) loads uboot
  3. U-boot (Flash or microSD) uses "bootcmd" environment command
  4. Default ISEE U-boot "bootcmd" environment (Flash) tries to load Linux kernel from...
    1. Network boot (Linux TFTP download + NFS rootfs export from ISEE SDK Virtual Machine)
    2. microSD boot
    3. Flash boot
  5. Linux kernel (Network or microSD or Flash) uses configured rootfs cmdline
  6. Root FS (Network or microSD or Flash or USB or RAMDISK ...)

IGEP v2 software related questions

Are the sources for the xloader, uBoot and kernel supplied with the IGEPv2 board available?

All of them are available on git.igep.es if you are a registered user.

How do I stop U-Boot command line at "Hit any key to stop autoboot" prompt ?

U-Boot command line is a serial tty console. IGEPv2 normally uses UART3. So, you need send any key to serial port using some serial terminal application.

Look up! Don't press any key of any usb keyboard connected to IGEPv2, you need press any key of your computer keyboard attached to serial link to IGEPv2 ( serial cable + minicom or other serial terminal application )










IGEP MODULE hardware related questions

Which revision is my IGEP MODULE board?

  • IGEP MODULE RD: They was sold on 2010-4Q (silkscreen: "IGEPv3 MODULE RD")
  • IGEP MODULE RE: They was sold on 2011 (silkscreen: "IGEPv3 MODULE RE")

IGEP MODULE software related questions

Which x-loader, u-boot and Linux kernel does IGEP MODULE use ?

You could download software from GIT software repositories and then you could follow IGEP0030 steps in the Linux kernel