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by pbisiac
Wed Aug 28, 2019 3:08 pm
Forum: HATs and other add-ons
Topic: LVDS add-on for Raspberry models with 40pin GPIO
Replies: 100
Views: 70092

Re: LVDS add-on for Raspberry models with 40pin GPIO

Hello, perhaps this question has already been answered...If I need LVDS + SPI on GPIO09+10+11, shall I use RGB MODE3 (565) and free these pins ? I did not find this in documentation....Thanks
by pbisiac
Sat Jun 22, 2019 3:07 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Using a Pi zero with emmc
Replies: 20
Views: 3366

Re: Using a Pi zero with emmc

@aBUGSworstnightmare: Yes, I bought an 8GB emmc and an emmc to sd card adapter. this to test the readability of my “fake sd card” from PI zero (failed). In case of success, I would design a little pcb, soldered in place of sd card connector, which will accept the emmc module. I just need to intercep...
by pbisiac
Fri Jun 21, 2019 6:25 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Using a Pi zero with emmc
Replies: 20
Views: 3366

Re: Using a Pi zero with emmc

I did not dig into hardware details of EMMC interfacing, I supposed that if a normal SD card interface (Mac) can read and program EMMCs (via my adapter) this should be possible for a Raspberry Pi Zero too. Probably it' all about configuring EMMC internal state machine/controller at bootstrap (here t...
by pbisiac
Thu Jun 20, 2019 1:09 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Using a Pi zero with emmc
Replies: 20
Views: 3366

Re: Using a Pi zero with emmc

PI Zero IS perfect for my application:
https://ibb.co/D9MK9Nw
The only thing I'd like to add is EMMC support. Nobody out there has tried this ? Weird...
by pbisiac
Thu Jun 20, 2019 10:02 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Using a Pi zero with emmc
Replies: 20
Views: 3366

Re: Using a Pi zero with emmc

Compute module uses emmc. Obviously it's hardware designer estimated that emmc is more reliable, it's availability is better, qualified suppliers, no sockets....I do agree. The question now should not be: "Why don't you use SD card instead ?". The question is "Is it possible to use an emmc instead o...
by pbisiac
Thu Jun 20, 2019 6:41 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Using a Pi zero with emmc
Replies: 20
Views: 3366

Re: Using a Pi zero with emmc

My devices will work in harsh environment, vibrations, temperature etc. I am designing a little industrial PLC and I won't rely on SD cards. My concern is only if emmc is suitable as a boot+storage device for a Raspberry Zero. BTW: I won't use compute module (which uses emmc if I am right...) becaus...
by pbisiac
Thu Jun 20, 2019 5:16 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Using a Pi zero with emmc
Replies: 20
Views: 3366

Re: Using a Pi zero with emmc

I think youre right, my emmc is recognised by Windows/Mac but not by RasPi. What am I trying to acheive? To free from unreliable sd card connector by plugging a little emmc module on my RasPi. Moreother, as I understand, emmc are far more reliable in terms of wear resistance/write cycles. I want my ...
by pbisiac
Wed Jun 19, 2019 6:47 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Using a Pi zero with emmc
Replies: 20
Views: 3366

Using a Pi zero with emmc

Hi all, I want to boot my Pi zero from an emmc. In the first step I wish to use an sd to emmc adapter, and upon successful boot I will design a little pcb soldered in place of sd connector with an emmc on top. Unfortunately my PI zero won’t boot from emmc (I cloned a working SD card with Etcher), so...
by pbisiac
Sun Mar 17, 2019 7:14 pm
Forum: Graphics, sound and multimedia
Topic: PecanPi -- Next Generation Raspberry Pi DAC and Streamer
Replies: 20
Views: 6802

Re: PecanPi -- Next Generation Raspberry Pi DAC and Streamer

Hello, I am evaluating a FPGA reclocker + slave DAC configuration for my RaspPi. Does PecanPi make both RaspPi and PCM1794 slave to an external master clock ? Is this configuration comparable/superior to RaspPi Master + reclocker ? Does the RaspPi kernel injects some jitter by its own (independently...
by pbisiac
Wed Oct 31, 2018 2:47 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: ENC28J60 on SPI CE1
Replies: 5
Views: 2008

Re: ENC28J60 on SPI CE1

Hi, I managed to use CE1 changing reg = <0x0>; in reg = <0x1>; in enc28j60.dts file. Now I have a doubt: my ethernet module still uses GPIO25 for INT. If I add a different interface (CAN with MCP2515) I guess I need a new interrupt line, right ? Can somebody tell me what I need to change in order to...
by pbisiac
Fri Sep 19, 2014 3:44 am
Forum: General discussion
Topic: Model B availability
Replies: 18
Views: 2747

Compute Module long-term availability

Hi all, Our company is starting a new embedded project and I wish to use new Compute module with a custom made baseboard. We are not new to this approach as we want and need to have our form factor, I/O devices and power supply. Now we need to have some guarantees about mid- and long-term availabili...
by pbisiac
Fri Sep 19, 2014 3:33 am
Forum: Troubleshooting
Topic: Problem with driver cross compilation
Replies: 0
Views: 482

Problem with driver cross compilation

Hi all, I am trying to compile and ins mod a "hello world" kernel module for my raspi B+. After reading many posts, choosed to cross compile raspi kernel and module on my Ubuntu 12.04 VM. I followed this post: https://www.grendelman.net/wp/cross-compiling-kernel-modules-for-raspbian/ I cloned "linux...
by pbisiac
Fri Aug 29, 2014 7:13 am
Forum: General discussion
Topic: Long-term availability of BCM2835
Replies: 1
Views: 562

Long-term availability of BCM2835

Hi all, We'd like to start develop some embedded boards using Compute Module as a CPU. We work mainly for other companies and our customers need long term availability of our custom electronic boards. As BCM2835 is a consumer electronics chip, and there is a big turnover on this type of devices, we'...

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