Search found 34 matches

by Robert
Thu Jun 11, 2026 3:04 pm
Forum: QuickFeather
Topic: QuickFeather Lite schematics?
Replies: 4
Views: 64860

Re: QuickFeather Lite schematics?

The Lite version is identical in schematic and layout, except it does not have the pressure‑sensor device populated on the PCB.
by Robert
Thu Jun 11, 2026 2:59 pm
Forum: QuickFeather
Topic: Not able to programm a Sparkfun board
Replies: 8
Views: 111945

Re: Not able to programm a Sparkfun board

I would suggest reloading the binary images for the board at https://github.com/QuickLogic-Corp/qf-initial-bins
by Robert
Thu Jun 11, 2026 2:44 pm
Forum: QuickFeather
Topic: A USB-A to USB-C cable is required because the QuickLogic thing+ USB Type C connector is not implemented correctly
Replies: 3
Views: 85969

Re: A USB-A to USB-C cable is required because the QuickLogic thing+ USB Type C connector is not implemented correctly

Hi, good question — happy to summarize how this works and where its limits are. The implementation is intentionally minimal. USB 1.1 full-speed signaling is 3.3 V, which standard LVCMOS33 FPGA I/O can drive directly, so the hardware is just: D+ and D− wired to two FPGA pins (usually through ~33 Ω se...
by Robert
Tue Mar 24, 2026 3:46 pm
Forum: QuickFeather
Topic: Bricked but how to connect J-Link?
Replies: 6
Views: 71204

Re: Bricked but how to connect J-Link?

The simplest approach is to use a J-Link 9‑pin Cortex‑M adapter or an equivalent option. https://www.segger.com/products/debug-probes/j-link/accessories/adapters/9-pin-cortex-m-adapter/ This also gives you the pin-out information, if you want to make your own cable. Or for For hobbyists and educatio...
by Robert
Tue Mar 24, 2026 3:32 pm
Forum: General Discussion
Topic: Power Consumption Optimization Techniques.
Replies: 6
Views: 10225

Re: Power Consumption Optimization Techniques.

We’ve developed a battery‑powered keyword‑detection solution that uses an FSM‑based state machine to dynamically adjust the clock frequency and enable or disable peripherals to achieve low‑power operation. This will only work if you are using FreeRTOS. I’ll work on providing a video and supporting d...
by Robert
Tue Jan 23, 2024 5:23 pm
Forum: EOS-S3
Topic: Is it possible to reach 72Mhz clocked design in eFPGA ?
Replies: 6
Views: 73049

Re: Is it possible to reach 72Mhz clocked design in eFPGA ?

We have implemented the simple USB interface for TinyFPGA where the IO run at 48MHz but this involved a hand placing the Flip-Flops etc.

So, 30MHz is a safe number.

Thanks
Robert
by Robert
Tue Jan 23, 2024 12:17 pm
Forum: EOS-S3
Topic: Is it possible to reach 72Mhz clocked design in eFPGA ?
Replies: 6
Views: 73049

Re: Is it possible to reach 72Mhz clocked design in eFPGA ?

Unfortunately, The EOS S3 FPGA is designed for low power and is not able to achieve 72MHz performance. This is why the FPGA clocks are separated from the main Cortex clock M4-F Realistically the performance is limited to around the frequency you are seeing. We have done some highly tuned simple shif...
by Robert
Fri Jan 19, 2024 3:33 pm
Forum: FPGAs
Topic: QL4009-1PF100C - Part Marking difference
Replies: 7
Views: 229552

Re: QL4009-1PF100C - Part Marking difference

Sorry for the delayed reply, I would need to check the date code marking to see if we still have record as this device. It would appear at first glance to have a date code of week 5 2002. The QL4009-1PF100C is a ViaLink device which is one time programmable. As this has custom marking I would sugges...
by Robert
Fri Jan 19, 2024 3:19 pm
Forum: EOS-S3
Topic: Creating high-speed FPGA design using Qorc-SDK
Replies: 11
Views: 63402

Re: Creating high-speed FPGA design using Qorc-SDK

What frequency external clock are you trying to use?

I would suggest bring the clock in on a FBIO pin and then instantiating a global clock buffer. I will look at creating an example if this is still an issue.
by Robert
Fri Jan 19, 2024 12:18 pm
Forum: QuickFeather
Topic: yosys: undefined symbol: ffi_type_double, version LIBFFI_BASE_7.0
Replies: 8
Views: 99956

Re: yosys: undefined symbol: ffi_type_double, version LIBFFI_BASE_7.0

You could try the latest release of the F4PGA group as they are maintaining Symbiflow

https://f4pga-examples.readthedocs.io/e ... ml#getting

They only support Ubuntu, Debian, Centos and Fedora so this may not fix the issue you have with Mint