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Diffstat (limited to 'GameLogic/vhdl/spiSlave.vhd')
-rw-r--r-- | GameLogic/vhdl/spiSlave.vhd | 105 |
1 files changed, 0 insertions, 105 deletions
diff --git a/GameLogic/vhdl/spiSlave.vhd b/GameLogic/vhdl/spiSlave.vhd deleted file mode 100644 index 7cf3e63..0000000 --- a/GameLogic/vhdl/spiSlave.vhd +++ /dev/null @@ -1,105 +0,0 @@ ----------------------------------------------------------------------------------- --- Company: --- Engineer: --- --- Create Date: 15.02.2023 21:09:16 --- Design Name: --- Module Name: top - Behavioral --- Project Name: --- Target Devices: --- Tool Versions: --- Description: --- --- Dependencies: --- --- Revision: --- Revision 0.01 - File Created --- Additional Comments: --- ----------------------------------------------------------------------------------- - - -library IEEE; -use IEEE.STD_LOGIC_1164.ALL; - --- Uncomment the following library declaration if using --- arithmetic functions with Signed or Unsigned values -use IEEE.NUMERIC_STD.ALL; -use IEEE.STD_LOGIC_UNSIGNED.ALL; --- Uncomment the following library declaration if instantiating --- any Xilinx leaf cells in this code. ---library UNISIM; ---use UNISIM.VComponents.all; - -entity spiSlave is - Port ( clkBoard : in std_logic; -- clock basys3 100MHz - clkSPI : in std_logic; -- incoming clock of SPI - dataSPI : in std_logic; -- incoming data of SPI - csSPI : in std_logic; -- incoming select of SPI - dataRead : out std_logic_vector(23 downto 0) := (others => '0') -- data read - - ); -end spiSlave; - -architecture Behavioral of spiSlave is - signal PulseFF0,PulseFF1,PulseFF2,PulseFF3 : std_logic := '0'; -- signal for metastability synchronizer of clk SPI - signal dataFF0,dataFF1,dataFF2,dataFF3 : std_logic := '0'; -- signal for metastability synchronizer of data SPI - signal ssFF0,ssFF1,ssFF2,ssFF3 : std_logic := '0'; -- signal for metastability synchronizer of slave select SPI - - signal data : std_logic_vector(23 downto 0) := (others => '0'); -- signal to store incomming data of dataSPI (2x 8bit) - signal counter : integer := 23; --counter for data position - signal enable : std_logic := '0'; -- enable signal if slave is selected -begin - - process (clkBoard) - begin - - if rising_edge(clkBoard) then - -- flip flop for clk SPI to synchronise a - PulseFF0 <= clkSPI; - PulseFF1 <= PulseFF0; - PulseFF2 <= PulseFF1; - PulseFF3 <= PulseFF2; - -- flip flop for data SPI to synchronise - dataFF0 <= dataSPI; - dataFF1 <= dataFF0; - dataFF2 <= dataFF1; - dataFF3 <= dataFF2; - -- flip flop for slave select SPI to synchronise - ssFF0 <= csSPI; - ssFF1 <= ssFF0; - ssFF2 <= ssFF1; - ssFF3 <= ssFF2; - -- check if slave select signal has falling edge (slave is selected by master) - if(ssFF3 = '1' and ssFF2 = '0') then - --reset counter if true - counter <= 23; - --disable data read if rising edge (slave is not selected) - elsif (ssFF3 = '0' and ssFF2 = '1') then - enable <= '0'; - end if; - --check if synchronised slave select signal is falling edge or data read is enabled - if(ssFF3 = '1' and ssFF2 = '0') or enable = '1' then - enable <= '1'; --enable data read - if (PulseFF3 = '0' and PulseFF2 = '1') then -- check for rising edge of clk SPI - if counter > -1 then - counter <= counter - 1; - -- data transfer into vector - data(counter) <= dataFF3; - end if; - end if; - --check if counter is done - if counter = -1 then - counter <= 23; --reset counter - dataRead <= data; - end if; - elsif (enable = '0') then - --dataRead <= data; - - end if; - - end if; - - end process; - -end Behavioral; |