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by walt
Wed Mar 28, 2018 3:48 pm
Forum: Compute Module
Topic: New IO board for Compute Module
Replies: 10
Views: 6104

Re: New IO board for Compute Module

It's great to hear your design works. However, I had shared our schmatics in https://www.displaymodule.com/products/dm-tft70-109
by walt
Fri Jan 23, 2015 11:58 am
Forum: Compute Module
Topic: New IO board for Compute Module
Replies: 10
Views: 6104

Re: New IO board for Compute Module

Hi guys,

Finally, we raise a indiegogo campaign, please have a look and try to help us.
by walt
Tue Dec 09, 2014 8:29 am
Forum: Beginners
Topic: How to use STMPE811 driver ( Touch Screen)
Replies: 1
Views: 868

Re: How to use STMPE811 driver ( Touch Screen)

I'm still need your help , please!
by walt
Mon Oct 20, 2014 3:40 am
Forum: Beginners
Topic: How to use STMPE811 driver ( Touch Screen)
Replies: 1
Views: 868

How to use STMPE811 driver ( Touch Screen)

Hi, I search the forum by STMPE, no one else uses this device for Touch Screen。 1) I could built it into kernel of raspbian by menuconfig > Device Drivers > Multifunction device drivers > STMicroelectronics STMPE Interface Drivers 2) compile LD kernel/built-in.o CC drivers/mfd/stmpe.o CC drivers/mfd...
by walt
Thu Oct 16, 2014 2:02 am
Forum: Graphics, sound and multimedia
Topic: Sources for lvds-hdmi converters
Replies: 1
Views: 1074

Re: Sources for lvds-hdmi converters

I am working on a board using "sn75lvds83 + tfp401", please see http://www.raspberrypi.org/forums/viewt ... 98&t=89069.
by walt
Wed Oct 15, 2014 9:42 am
Forum: Raspbian
Topic: [fixed] kernel building need updated in more detail
Replies: 6
Views: 2091

Re: Doc: kernel building need updated in more detail

Hi all, Finally, I finished to build the kernel successfully in PC: ubuntu 14.04 The error is happend without "$ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- bcmrpi_defconfig" The total steps should be : 1. $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- bcmrpi_defconfig 2. make ARCH=arm CROS...
by walt
Tue Oct 14, 2014 11:28 am
Forum: Automation, sensing and robotics
Topic: MMA7455 with Raspberry Pi
Replies: 3
Views: 2245

Re: MMA7455 with Raspberry Pi

please note

Code: Select all

 b = smbus.SMBus(0) 
should be replace if necessary
SMBus(0) --> A, i2c-0 bus
SMBus(1) --> B,B+,.... i2c-1 bus
by walt
Sun Oct 12, 2014 11:32 am
Forum: Compute Module
Topic: New IO board for Compute Module
Replies: 10
Views: 6104

New IO board for Compute Module

Hi all, I'd like to share a New IO board for Compute Module : DM-RIB from www.displaymodule.com . HW Blocks contains: Video: CM <-- HDMI --> TI TFP401A + SN75LVDS83B <--- LVDS ---> 7" TFT LCD CM <--i2c / spi --> touch input Audio: CM <---> 3.5mm stereo jack USB: CM <-- USB uplink --> LAN9514 <---USB...
by walt
Thu Oct 09, 2014 12:07 pm
Forum: Troubleshooting
Topic: [fixed] i2c1 only, where is i2c0
Replies: 2
Views: 574

[fixed] i2c1 only, where is i2c0

Problem: >ls /sys/class/i2c-dev/ i2c-1 How could I enable i2c-0, and i2c-1 both? I learned from https://learn.adafruit.com/adafruits-raspberry-pi-lesson-4-gpio-setup/configuring-i2c, i2c-1 replace with i2c-0. But could we use both i2c port? ------------------ HW: 1. Raspberry CM board 2. My base boa...
by walt
Thu Oct 09, 2014 9:41 am
Forum: General discussion
Topic: [fixed] Please add "breadcrumb" in a post
Replies: 5
Views: 967

[fixed] Please add "breadcrumb" in a post

When I review the posts here, I cannot see "breadcrumb" on a specific post, which is useful to know the post is belong which topics.

Please, admin enable this feature.
it seems like:

Forum -> Community -> General discussion
Forum -> Using the Raspberry Pi -> Beginners
by walt
Tue Sep 30, 2014 6:18 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: GPIO: switching between ALT functions
Replies: 12
Views: 29351

Re: GPIO: switching between ALT functions

Great. I follow your steps, and PWM0, 1 on GPIO12 / 13 are worked as alt0 function.
Thank you .

But I have a little question, how to roll back to GPIO function. From datasheet, alt0 --alt5 is other functions, so what value of ALT_NUMBER should be for GPIO?

gpio_alt -p PIN_NUMBER -f ALT_NUMBER
by walt
Thu Sep 18, 2014 1:34 am
Forum: Raspbian
Topic: [fixed] kernel building need updated in more detail
Replies: 6
Views: 2091

Re: Doc: kernel building need updated in more detail

thank you. However, I meet another error in module compile: make -j2 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- INSTALL_MOD_PATH=out modules CHK include/config/kernel.release CHK include/generated/uapi/linux/version.h CHK include/generated/utsrelease.h make[1]: `include/generated/mach-types.h' is u...
by walt
Wed Sep 17, 2014 2:31 am
Forum: Compute Module
Topic: [Fixed][Compute module] cannot boot up - USB Warning
Replies: 4
Views: 2932

Re: [Compute module] cannot boot up - USB Warning

Great, I double check our IO board about USB_OTG_ID, which is float, while it is pulled low in RPI-CMIO-V1_2-SCHEMATIC.pdf.

Then I short it by GND.
The error is fixed!! Now, I could log in.

Thanks.
by walt
Tue Sep 16, 2014 2:54 pm
Forum: Raspbian
Topic: [fixed] kernel building need updated in more detail
Replies: 6
Views: 2091

[fixed] kernel building need updated in more detail

http://www.raspberrypi.org/documentation/linux/kernel/building.md I need cross compile (Is it more popular?) but after following steps: $ cd linux $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- bcmrpi_defconfig $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- I cannot find where is the image? ...
by walt
Tue Sep 16, 2014 2:14 pm
Forum: Compute Module
Topic: [Fixed][Compute module] cannot boot up - USB Warning
Replies: 4
Views: 2932

[Fixed][Compute module] cannot boot up - USB Warning

HW: computer module + SMSC LAN9514 SW: Official RASPBIAN Debian Wheezy Version:September 2014 Release date:2014-09-09 Default login:pi / raspberry URL:raspbian.org Kernel version:3.12 from http://www.raspberrypi.org/downloads/ ------------------- I captured UART during booting: USB Error [ 1.950354]...
by walt
Mon May 26, 2014 2:35 pm
Forum: For sale
Topic: Offering a cheap PCB assembly service (UK)
Replies: 4
Views: 4788

Re: Offering a cheap PCB assembly service (UK)

The PCBA Turnkey service from http://www.nexpcb.com has detailed specification and fixed price.
But need to raise a quotation for those do not meet their requirement.

Although it is old post, maybe above information could help some guys here.
by walt
Tue Apr 22, 2014 8:05 am
Forum: Off topic discussion
Topic: PCB Manufacturing/Prototype
Replies: 32
Views: 20792

Re: PCB Manufacturing/Prototype

For PCB prototype, I recommend PCB Fabrication packages from NexPCB. If the specification of the board meet their conditions, just place an order, no need to get a complex quotation.

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