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https://opencores.org/ocsvn/System09/System09/trunk
[/] [System09/] [trunk/] [rtl/] [VHDL/] [spi-master.vhd] - Diff between revs 118 and 223
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| Rev 118 |
Rev 223 |
| Line 88... |
Line 88... |
--
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--
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-- Version Author Date Description
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-- Version Author Date Description
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--
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--
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-- 0.1 Hans Huebner 23 February 2009 SPI bus master for System09
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-- 0.1 Hans Huebner 23 February 2009 SPI bus master for System09
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-- 0.2 John Kent 16 June 2010 Added GPL notice
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-- 0.2 John Kent 16 June 2010 Added GPL notice
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--
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-- 0.3 David Burnette 8 April 2021 Added read-back of clk/transfer size
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-- as well as a debug tag to confirm
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-- read operation
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--
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--
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library ieee;
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library ieee;
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use ieee.std_logic_1164.all;
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use ieee.std_logic_1164.all;
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use ieee.std_logic_unsigned.all;
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use ieee.std_logic_unsigned.all;
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| Line 203... |
Line 205... |
data_out(0) <= '0';
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data_out(0) <= '0';
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else
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else
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data_out(0) <= '1';
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data_out(0) <= '1';
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end if;
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end if;
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data_out(1) <= deselect;
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data_out(1) <= deselect;
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when "11" =>
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data_out(1 downto 0) <= spi_clk_divide; -- allow read back of config
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data_out(3 downto 2) <= transfer_length;
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data_out(7 downto 4) <= "1010"; -- debug tag
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when others =>
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when others =>
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null;
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null;
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end case;
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end case;
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end process;
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end process;
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