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Altera_Forum
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12 years ago

Building an SPI Decoder into Altera

Hello, I am working on a project which requires interfacing between a Microcontroller and an Altera FPGA. I'm using an Arduino UNO and DE0Nano Cyclone IV. The Arduino sends a 64bit word via SPI...
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Altera_Forum
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12 years ago

From what I take, you're suggesting something like this? 


process (Clk, Reset, SPI_Clk) begin
	if Reset = '1' then
		shift_reg64 <= x"0000000000000000";
	elsif rising_edge(Clk) then
		if rising_edge(SPI_Clk) then
			shift_reg64(63 downto 0) <= shift_reg64(62 downto 0) & SPI_Data;
		end if;
	end if;
end process;

But this code doesn't compile... Any idea?