Question

Altear的FPGA支持SPI接口吗？求大神帮助

Answer 1

FPGA或者CPLD只要具备4IO口的应该都支持SPI接口，其实它Hardware源代码也很简单，建议参考一些Open Cores做一些修改。 接口信号大致为： entity spi_ctrl is port ( clk_in : in std_logic; rst : in std_logic; spi_clk : out std_logic; spi_cs : out std_logic; spi_din : in std_logic; spi_dout : out std_logic; sel : in std_logic; wr : in std_logic; addr : in std_logic_vector (2 downto 0); d_in : in std_logic_vector (7 downto 0); d_out : out std_logic_vector (7 downto 0) ); end spi_ctrl;