Commit 95c3d5ce authored by Friedrich Beckmann's avatar Friedrich Beckmann
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add de1_dac

This is the DAC from the THDB board
parent ee1b3d28
# Pin Configuration
set_location_assignment PIN_L1 -to CLOCK_50
set_location_assignment PIN_R22 -to KEY0
set_location_assignment PIN_L22 -to SW[0]
set_location_assignment PIN_L21 -to SW[1]
set_location_assignment PIN_M22 -to SW[2]
set_location_assignment PIN_V12 -to SW[3]
set_location_assignment PIN_W12 -to SW[4]
set_location_assignment PIN_U12 -to SW[5]
set_location_assignment PIN_U11 -to SW[6]
set_location_assignment PIN_M2 -to SW[7]
set_location_assignment PIN_M1 -to SW[8]
set_location_assignment PIN_L2 -to SW[9]
set_location_assignment PIN_R20 -to LEDR[0]
set_location_assignment PIN_R19 -to LEDR[1]
set_location_assignment PIN_U19 -to LEDR[2]
set_location_assignment PIN_Y19 -to LEDR[3]
set_location_assignment PIN_T18 -to LEDR[4]
set_location_assignment PIN_V19 -to LEDR[5]
set_location_assignment PIN_Y18 -to LEDR[6]
set_location_assignment PIN_U18 -to LEDR[7]
set_location_assignment PIN_R18 -to LEDR[8]
set_location_assignment PIN_R17 -to LEDR[9]
# DAC Pins on GPIO Header
set_location_assignment PIN_C19 -to DAC_CLK_A
set_location_assignment PIN_D19 -to DAC_CLK_B
set_location_assignment PIN_C18 -to DAC_DA[0]
set_location_assignment PIN_F15 -to DAC_DA[10]
set_location_assignment PIN_E14 -to DAC_DA[11]
set_location_assignment PIN_G15 -to DAC_DA[12]
set_location_assignment PIN_H13 -to DAC_DA[13]
set_location_assignment PIN_D16 -to DAC_DA[1]
set_location_assignment PIN_C17 -to DAC_DA[2]
set_location_assignment PIN_D15 -to DAC_DA[3]
set_location_assignment PIN_D14 -to DAC_DA[4]
set_location_assignment PIN_F13 -to DAC_DA[5]
set_location_assignment PIN_C14 -to DAC_DA[6]
set_location_assignment PIN_F12 -to DAC_DA[7]
set_location_assignment PIN_G16 -to DAC_DA[8]
set_location_assignment PIN_E15 -to DAC_DA[9]
set_location_assignment PIN_P15 -to DAC_DB[0]
set_location_assignment PIN_G20 -to DAC_DB[10]
set_location_assignment PIN_E19 -to DAC_DB[11]
set_location_assignment PIN_F20 -to DAC_DB[12]
set_location_assignment PIN_D20 -to DAC_DB[13]
set_location_assignment PIN_N22 -to DAC_DB[1]
set_location_assignment PIN_N15 -to DAC_DB[2]
set_location_assignment PIN_N21 -to DAC_DB[3]
set_location_assignment PIN_J15 -to DAC_DB[4]
set_location_assignment PIN_G17 -to DAC_DB[5]
set_location_assignment PIN_H18 -to DAC_DB[6]
set_location_assignment PIN_H17 -to DAC_DB[7]
set_location_assignment PIN_G18 -to DAC_DB[8]
set_location_assignment PIN_E18 -to DAC_DB[9]
set_location_assignment PIN_P18 -to DAC_MODE
set_location_assignment PIN_C20 -to DAC_WRT_A
set_location_assignment PIN_P17 -to DAC_WRT_B
set_location_assignment PIN_C21 -to ADC_CLK_A
set_location_assignment PIN_D21 -to ADC_CLK_B
set_location_assignment PIN_L18 -to ADC_OEB_A
set_location_assignment PIN_K20 -to ADC_OEB_B
set_location_assignment PIN_J18 -to POWER_ON
SOURCE_FILES = ../../src/de1_dac_rtl.vhd
FAMILY = "Cyclone II"
include ../makefile
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity de1_dac is
port ( CLOCK_50 : in std_ulogic;
SW : in std_ulogic_vector(9 downto 0);
KEY0 : in std_ulogic;
DAC_MODE : out std_ulogic; --1=dual port, 0=interleaved
DAC_WRT_A : out std_ulogic;
DAC_WRT_B : out std_ulogic;
DAC_CLK_A : out std_ulogic; -- PLL_OUT_DAC0 in User Manual
DAC_CLK_B : out std_ulogic; -- PLL_OUT_DAC1 in User Manual
DAC_DA : out std_ulogic_vector(13 downto 0);
DAC_DB : out std_ulogic_vector(13 downto 0);
ADC_CLK_A : out std_ulogic;
ADC_CLK_B : out std_ulogic;
POWER_ON : out std_ulogic;
ADC_OEB_A : out std_ulogic;
ADC_OEB_B : out std_ulogic;
LEDR : out std_ulogic_vector(9 downto 0)); -- red LEDs
end entity;
architecture rtl of de1_dac is
signal clk,rst_n : std_ulogic;
signal cnt : unsigned(13 downto 0);
signal phase_inc : unsigned(9 downto 0);
signal dac_a_reg, dac_a_next, dac_b_reg : unsigned(13 downto 0);
clk <= CLOCK_50;
rst_n <= KEY0;
DAC_MODE <= '1'; --dual port
DAC_CLK_A <= clk;
DAC_CLK_B <= clk;
DAC_WRT_A <= clk;
DAC_WRT_B <= clk;
phase_inc <= unsigned(SW);
cnt <= (others => '0') when rst_n = '0' else cnt+phase_inc when rising_edge(clk);
dac_a_next <= (others => '1') when cnt = 0 else (others => '0');
dac_a_reg <= (others => '0') when rst_n = '0' else dac_a_next when falling_edge(clk);
dac_b_reg <= (others => '0') when rst_n = '0' else cnt when falling_edge(clk);
DAC_DA <= std_ulogic_vector(dac_a_reg);
DAC_DB <= std_ulogic_vector(dac_b_reg);
-- ADC Section - switch off everything
ADC_CLK_A <= '0';
ADC_CLK_B <= '0';
ADC_OEB_A <= '1';
ADC_OEB_B <= '1';
POWER_ON <= '1';
end architecture rtl;
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