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.
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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