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by mic_s
Fri May 31, 2019 9:33 am
Forum: General discussion
Topic: RISC-V
Replies: 135
Views: 8051

Re: RISC-V

Do RISC-V specs also define a memory controller? Good ones are very difficult to design. Yes, difficult to design. A lot more than a simple state machine. Currently there is only „The RISC-V Instruction Set Manual“ (Vol 1: Unprivileged ISA / Vol 2: Privileged Architecture ) That said, there are som...
by mic_s
Fri May 31, 2019 8:32 am
Forum: General discussion
Topic: RISC-V
Replies: 135
Views: 8051

Re: RISC-V

Any other potential chips? Low-end/lowcost RISC-V Microconroller from WinChip (WCH): CH572 (RISC-V, 60 Mhz, … , usb Host/Device, Bluethooth, 12bit AD, 3 Timers, 2 UARTs, SPI, WDOG ) Its not 8-pin, but QFN28 Smallest FPGA's are the Lattice 16pins? Not at all. There are (not well known) 1.0*1.2 mm 8-...
by mic_s
Mon May 27, 2019 7:40 am
Forum: Off topic discussion
Topic: Bluetooth 5.0 design Contest
Replies: 0
Views: 641

Bluetooth 5.0 design Contest

If you are a maker and interrested in Bluetooth 5 IoT this may be for you: https://www.rs-online.com/designspark/cypress-bluetooth-5-0-iot-design-contest (and links threin) If this is for you - hurry up: Apply for free Development-Kits and start your summer project. (Note : I'm in no relation with c...
by mic_s
Sun Mar 17, 2019 11:05 pm
Forum: General discussion
Topic: Raspberry Pi Zero W for moderate volume applications
Replies: 22
Views: 1485

Re: Raspberry Pi Zero W for moderate volume applications

Adafruit is Adafruit. No problem with this. https://shop.pimoroni.com/products/raspberry-pi-zero-wh-with-pre-soldered-header says: Raspberry Pi Zero WH (pre-soldered) $14.43US „This product is limited to 10 per order.“ … may be you are qualified for an additional 10% discount (from Friday 15th March...
by mic_s
Fri Mar 15, 2019 11:29 pm
Forum: General discussion
Topic: Zero clusters? Pi day deals
Replies: 15
Views: 1164

Re: Zero clusters? Pi day deals

Example of a super-cheap pi-zero cluster : https://www.raspberrypi.org/forums/viewtopic.php?f=49&t=199994 (and links therein) Usecase ? The answer depends on your skills. For the beginner: GPIO – Expander For the expirienced : to learn MPI, to master the 12 SIMD-processing units in every zero of you...
by mic_s
Sun Mar 03, 2019 2:11 pm
Forum: Off topic discussion
Topic: Work on open source projects … you will be paid by Google
Replies: 0
Views: 546

Work on open source projects … you will be paid by Google

This post is a very short note for those students (CS, EE or aquivalent) who are interested in open source and are willing to work on it. Google Summer of Code 2019 (GSOC 2019) General infos are here : https://summerofcode.withgoogle.com/ (and links therein, please read carefully) List of qualified ...
by mic_s
Mon Jan 07, 2019 2:47 pm
Forum: General discussion
Topic: RISC-V
Replies: 135
Views: 8051

Re: RISC-V

Of course Eben has to be diplomatic, given that he works for Broadcom, which is heavily invested in ARM .Why not both ? Western digital (a big player, no question) is with ARM and with RISC-V. We will see RTL of there RV32IMC SweRV in a view weeks. Public. On github: https://github.com/westerndigit...
by mic_s
Sun Jan 06, 2019 4:26 pm
Forum: General discussion
Topic: RISC-V
Replies: 135
Views: 8051

Re: RISC-V

These [Sifives board] look good (the "Unleashed") but at $999 for the board it seems pricey. Especially as there is no license fee for the CPU's. If you are satisfied with 2 RiscV64G cores (instead of 4) and Fmax some 400-700 Mhz there may be an low-cost alternative: K210. $5USD - $20USD, we are of...
by mic_s
Tue Dec 18, 2018 8:02 pm
Forum: Off topic discussion
Topic: Design your own 8$-RISC-V (may work with your pi)
Replies: 25
Views: 6125

Re: Design your own 8$-RISC-V (may work with your pi)

… and the winners are : 1. Place: Charls Papon with VexRiscv-Variants (SpinalHDL-based). GitHub: https://github.com/SpinalHDL/VexRiscvSoftcoreContest2018 $6,000 USD 2. Place: Antti Lukats with „Engine-V“. GitHub: https://github.com/micro-FPGA/engine-V $3,000 USD 3. Place: Changyi Gu with „PulseRain ...
by mic_s
Sat Nov 17, 2018 4:13 pm
Forum: General discussion
Topic: Multiple GPUs for AI/number crunching.
Replies: 2
Views: 426

Re: Multiple GPUs for AI/number crunching.

We really need to get kids into AI as well as programming and this may be a cheaper more acessible way to do it. When it comes to AI the low-cost Pi0/Pi0W respectively the embedded QPUs (rouphly speaking: 12 vector-processing units ) are an option (Details: https://docs.broadcom.com/docs/12358545, ...
by mic_s
Thu Nov 01, 2018 7:49 pm
Forum: HATs and other add-ons
Topic: PoE HAT - USB Ports not working - over-current (FIXED - New Hardware Release)
Replies: 327
Views: 81624

Re: PoE HAT - USB Ports not working - over-current

Just out of interest, how do you know that? Yesterday Eben Upton on twitter: „ … 7,600 units arrived with us yesterday. They'll be shipped to Approved Resellers this week, so a good chance of some availability next week.“ I'm not envolved in the details. May be he meant the modified ones from the o...
by mic_s
Wed Oct 31, 2018 11:53 pm
Forum: HATs and other add-ons
Topic: PoE HAT - USB Ports not working - over-current (FIXED - New Hardware Release)
Replies: 327
Views: 81624

Re: PoE HAT - USB Ports not working - over-current

About 7000 brand new PoE Hats arrived and are now on the way to resellers.
.
by mic_s
Mon Oct 29, 2018 9:10 am
Forum: Off topic discussion
Topic: Design your own 8$-RISC-V (may work with your pi)
Replies: 25
Views: 6125

Re: Design your own 8$-RISC-V (may work with your pi)

When I got upduino 1.0 I have rebuilt IceStorm toolchain with yosys, arachne-pnr directly on the Pi3. It run over night but finished successfully after many hours (with rootfs on ssd over USB) But then I got curious about FPGA, logic design, CPU design...Especially as they are now readily available...
by mic_s
Sun Oct 14, 2018 7:23 pm
Forum: Off topic discussion
Topic: Design your own 8$-RISC-V (may work with your pi)
Replies: 25
Views: 6125

Re: Design your own 8$-RISC-V (may work with your pi)

I'm guessing the $13.99 version 2.0 board with a USB programming connector would be the best choice if also looking at developing on a PC ? Yes. I'm not sure we should worry about LOC so much. It's FPGA usage that matters at the end of the day. You are right. But a low number of the required LOC (V...
by mic_s
Sun Oct 14, 2018 1:11 pm
Forum: Off topic discussion
Topic: Design your own 8$-RISC-V (may work with your pi)
Replies: 25
Views: 6125

Re: Design your own 8$-RISC-V (may work with your pi)

Number of Verilog-LOC for a rv32I-core ? Interesting question. The mentioned darkriscV-core is 360 LOC ( Note: darkrisc dos't implement all Integer-Instructions yet … there are errors ... work in progress … i'm not envolved but it looks like darkrisc is a moving target … so final there will be a lit...
by mic_s
Sat Oct 13, 2018 9:13 pm
Forum: Off topic discussion
Topic: Design your own 8$-RISC-V (may work with your pi)
Replies: 25
Views: 6125

Re: Design your own 8$-RISC-V (may work with your pi)

You are right. This is not for the beginner. It is meant for the skilled Verilog/VHDL/FPGA-Programmer. I don't see how anyone could create an entry to this competition in the time available, surely the winner will be an existing design adapted to the competition rules. May be. … But there are also l...
by mic_s
Sat Oct 13, 2018 7:04 pm
Forum: Off topic discussion
Topic: Design your own 8$-RISC-V (may work with your pi)
Replies: 25
Views: 6125

Design your own 8$-RISC-V (may work with your pi)

If you are interrested to design your own RISC-V-Microprocessor / program in verilog, VHDL / this may be for you (the smallest FPGA-Harrdware-development system is available for 8$) details: https://riscv.org/2018contest/ ( win up to USD $6,000, hurry up ) [moderator] Its now 2019, and the contest i...
by mic_s
Tue Oct 09, 2018 8:14 pm
Forum: General discussion
Topic: where to buy rpi zero 1.3 for builing a cluster
Replies: 19
Views: 1343

Re: where to buy rpi zero 1.3 for builing a cluster

As it stands I refuse to feel any guilt or bad feelings about adding Zero without header to any order as long as the shop allows me to do so. If you need 5-10 zeros without header : hints are given in this thread. Anouther option: desolder the ZeroHs, they are available in low quantities (approxima...
by mic_s
Fri Sep 28, 2018 9:53 pm
Forum: Advanced users
Topic: Diskless booting Zeroes from Windows
Replies: 83
Views: 8123

Re: Diskless booting Zeroes from Windows

Not exactly what this thread is about … but iff anyone is interested in running or booting raspbian on a pi zero WITHOUT an sd-card :

https://dev.webonomic.nl/how-to-run-or- ... an-sd-card

may be of interest (read the comments therein).
.
by mic_s
Fri Aug 31, 2018 5:27 pm
Forum: General discussion
Topic: "Real-time" object detection on Raspberry Pi
Replies: 4
Views: 5409

Re: "Real-time" object detection on Raspberry Pi

You dosn't need to invest in a Movidius Compute Stick. The very well dokumented GPU Processing Units in your extrem-low-cost Rasp-Zero are perfectly adequate for a journey in deep learning / object recognition : details: https://youtu.be/zRaQS5MA2fU (no additional hardware, besides the cam and the s...
by mic_s
Sat Jul 14, 2018 11:35 am
Forum: AIY Projects
Topic: It's very urgent!!!!! Regarding Google aiy voice kit
Replies: 2
Views: 639

Re: It's very urgent!!!!! Regarding Google aiy voice kit

Ok – we see, you are interested in AI without … nearly anything. Solution ( this time : AI object recognition with super-low-cost pi-zero) : https://youtu.be/zRaQS5MA2fU (The 12 QPU dual issue Processing Units in our GPU are used. Here no additional hardware, besides the cam and the sdhc is required...
by mic_s
Sat Jun 09, 2018 2:45 pm
Forum: Off topic discussion
Topic: GPU Hardware and/or Software Suggestion
Replies: 4
Views: 1245

Re: GPU Hardware and/or Software Suggestion

Lot of options : option 1 : https://www.raspberrypi.org/forums/viewtopic.php?t=194952 As ghans mentined: room for improvement In the meantime option 2 may be of value : https://github.com/mn416/QPULib (small footprint, easy and ready to run) When it comes to performance: option 3 : https://github.co...
by mic_s
Mon May 14, 2018 12:26 pm
Forum: Troubleshooting
Topic: Raspberry Pi Zero W - Defective WiFi chip
Replies: 10
Views: 826

Re: Raspberry Pi Zero W - Defective WiFi chip

You are right, the current pi-0w is with CYW43438. examples: mouser: CYW43438KUBGT ... 5000+ .. 5.46 $ digikey: CYW43438KUBGT .... 5000+ ... 5.125$ The price points you mention are the (current) minium. Please note, the CYW43438KUBG is a 63-ball WLBGA 0.40 pitch. Probably a soldering challenge for t...
by mic_s
Mon May 14, 2018 12:07 pm
Forum: Troubleshooting
Topic: Raspberry Pi Zero W - Defective WiFi chip
Replies: 10
Views: 826

Re: Raspberry Pi Zero W - Defective WiFi chip

Apart from the time required, take the price for the CYW43455 in consideration : some examples: mouser: BCM43455HKUBG … 1000+ … 3.89 $ digikey: BCM43455XKUBGT-ND …. 5000+ …. 5.92500 $ arrow: CYW43455XKUBGT …. 5000+ …. 8.19 $ cypress: CYW43455xkubgt …. 5.69 $ I would buy a new pi-0W and use the defec...
by mic_s
Tue May 08, 2018 8:18 am
Forum: General discussion
Topic: Can a USB monitor work with pi3?
Replies: 7
Views: 10765

Re: Can a USB monitor work with pi3?

The Raspberry Pi does not have a USB3 BUS which is needed for I/O !!!!!!
USB3 is not needed here.
That said "USB20 connection may affect brightness settings and image quality" (https://www.asus.com/us/Commercial-Monitors/MB168BPlus/)
.

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