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anybody knows a small open source/free cpu soft with JTAG or other source level debug

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bt36

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Hi Everybody,

Just a long-shot here,

Anybody know of a small CPU or micro controller soft-core
that is free and open source, with source level debugger (via JTAG or other means) please do let me know.

This is for an FPGA project.

This will serve as a small management engine for the FPGA, therefore performance is really not important at all, low resource usage is.

Ease of integration and ease of use (i.e. debugger with a nice GUI) are also very important.

Many thanks in advance :)
 

Take a look at PicoBlaze from Xilinx: PicoBlaze User Resources

bt36 said:
Hi Everybody,

Just a long-shot here,

Anybody know of a small CPU or micro controller soft-core
that is free and open source, with source level debugger (via JTAG or other means) please do let me know.

This is for an FPGA project.

This will serve as a small management engine for the FPGA, therefore performance is really not important at all, low resource usage is.

Ease of integration and ease of use (i.e. debugger with a nice GUI) are also very important.

Many thanks in advance :)
Click to expand...
 

Hi cks3976, jimwu88,

thanks for your reply :)

I am using both Altera and Xilinx.

Therefore PicoBlaze is not an option since if I'm not mistaken it is Xilinx-only , not to mention closed source.

About Lattice, well it doesn't seem to have a real debugger with JTAG or other connection to the target MCU.

Any other suggestions?
 

Which Altera / Xilinx are you using ?
 

Xilinx Virtex-5 and Altera Cyclone-III.
I know both vendors offer a free MCU of their own (NIOS, picoblaze) but I though about getting a MCU that is vendor independent such that i do not have to go through the learning curve twice...
 

bt36 said:
Hi cks3976, jimwu88,

thanks for your reply :)

I am using both Altera and Xilinx.

Therefore PicoBlaze is not an option since if I'm not mistaken it is Xilinx-only , not to mention closed source.

About Lattice, well it doesn't seem to have a real debugger with JTAG or other connection to the target MCU.

Any other suggestions?
Click to expand...

Why not try AVR Arduino Arduino - HomePage which has all AVR features, JTAG, ADC, PWM, USART, USB, CAN and much more
 

because we need the FPGA part of it :)
we need fast, parallel, programmable logic.
The MCU part is just a small management engine inside the FPGA that does all kinds of sequences of operations which
are more naturally and easily expressed as SW, instead of coding a huge FSM in e.g. Verilog.
 

anybody knows what is Lattice Diamond and if you can debug the Lattice using decent IDE ?
or Diamond not free?
 

Lattice Diamond is similar like Quartus or Xilinx ISE.

If you look at the Lattice Semiconductor website, you will find a starter edition which is free.
 

bt36 said:
Hi Everybody,

Just a long-shot here,

Anybody know of a small CPU or micro controller soft-core
that is free and open source, with source level debugger (via JTAG or other means) please do let me know.

This is for an FPGA project.

This will serve as a small management engine for the FPGA, therefore performance is really not important at all, low resource usage is.

Ease of integration and ease of use (i.e. debugger with a nice GUI) are also very important.

Many thanks in advance :)
Click to expand...


oc8051 or mc8051?
 

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