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Questions tagged [softcore]

A soft core is a microprocessor core that can be wholly implemented using logic synthesis.

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2answers
177 views

USB Softcore for FPGA : Extra resistor on FPGA transmitter pin

Have anyone used this USB softcore before ? Why do we need extra resistance on the tx pin ONLY ? Whichever pins you transmit on need to have resistors after them. The exact values will depend ...
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1answer
140 views

Implementation of NIOS Softcore alongwith HDL modules on Aletra Cyclone IVGX

My question is not on 'how can' but 'if can'. So I believe people with sufficient experience on any FPGA family might be able to help me out here. Problem Statement: I need to model a very basic ...
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2answers
3k views

What are the typical uses for a soft-processor such as MicroBlaze?

I know that the FPGA-DSP combination is typically used for high-end power electronics/ultrasound/MRI/etc. Is it possible for the soft-processor to fully replace the DSP even on lower-end FPGAs such ...
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1answer
2k views

How do I get a chinese nRF51822 development kit running examples with an ST-link, Keil uVision?

I've been working at this for days with not much information out there to assist me in fixing my issues, so I figured I'd make a post here. I'm using a cheap chinese nRF51822 module and motherboard ...
3
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4answers
756 views

What are the advantages to a separate processor when there is an FPGA present?

Consider an embedded application with both a discrete processor(ARM, AVR, PIC, etc) and an FPGA to offload some of the work or interface with specific hardware. Assuming there are sufficient ...
3
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1answer
226 views

Designing a peripheral for soft core CPU

I've been implementing a hardware module in VHDL for part of my university dissertation and I want to implement it as part of a NIOS II core in my cyclone 2 FPGA. This uses the Avalon interface, what ...
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1answer
230 views

Data transfer from Cortex M1 to AHB slaves

I am working on ACTEL Fusion platform which provides Cortex M1 softcore. Is it possible for AHB-lite slaves to access Cortex M1 memory. For e.g If my main C file has an array of unsigned_int 's. Is it ...
5
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2answers
920 views

Is there an FPGA implementation of Donald Knuth's MMIX?

Does anyone know of an FPGA soft-core implementation of Donald Knuth's MMIX? My google search only found old discussions of people who knew people who were working on an FPGA implementation.
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11answers
50k views

Cheapest FPGAs? [closed]

How cheap do FPGAs get? I know they're more expensive than microprocessors of comparable capability, but I wonder if there exist FPGAs that could contain a Microblaze soft core running Linux, while ...
36
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7answers
3k views

Readable and educational implementations of a CPU in a HDL

Can you recommend a readable and educational implementation of a CPU in VHDL or Verilog? Preferably something well documented. P.S. I know I can look at opencores, ...