HI, I'm new in FPGA, I have to build a SPI interface (in VHDL) to let an fpga read and write a flash memory. The fpga is a Xilinx Spartan3E, while the memory is an ST M25P16 (serial I/O). Do you know if is there any built vhdl core to start with?
Thanks in advance Giulio
Regards,
-- Mark McDougall, Engineer Virtual Logic Pty Ltd,
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The problem with SPI is that it comes in a near-infinity of differen flavours, so IP designed for 1 flavour might be difficult to adapt for different flavour.
Good luck! (You will need it)
But the OP has a flash memory already specified.
The SPI interface is fairly trivial (once you've mastered the shift register); it's a good project for a beginner.
-- Joe Samson Pixel Velocity
An SPI interface is really pretty easy to implement. The major difficulty is reading through the device data sheet to make sure you get all the details correct. There are a large number of different flavors of SPI, so an interface developed for one application is probably not going to be a perfect fit for another. It is a good beginner's project.
I agree both of you: this is a very good project for a beginner. Once you master the shift register the other things become a piece of cake. Try to use simulator (Modelsim XE) for code simulation and Chipscope for HW debug. These two tools will eventually save you a lot of time.
Guru
You can try
i just found a project for SPI controller in opencores.org (spiflashcontroller) it's not as simple as I expected, but i found it more useful! thank you all
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