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--------------------------------------------------------------------
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-- Entity: MultiIO_APB
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-- File: MultiIO_APB.vhd
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-- Author: Thomas Ameseder, Gleichmann Electronics
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-- Based on an orginal version by Manfred.Helzle@embedd.it
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--
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-- Description: APB Multiple digital I/O for minimal User Interface
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--------------------------------------------------------------------
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-- Functionality:
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-- 8 LEDs, active low or high, r/w
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-- dual 7Segment, active low or high, w only
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-- 8 DIL Switches, active low or high, r only
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-- 8 Buttons, active low or high, r only, with IRQ enables
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--------------------------------------------------------------------
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library ieee;
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use ieee.std_logic_1164.all;
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library grlib;
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use grlib.amba.all;
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use grlib.stdlib.all;
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use grlib.devices.all;
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library gleichmann;
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use gleichmann.spi.all;
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use gleichmann.i2c.all;
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use gleichmann.miscellaneous.all;
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use gleichmann.ge_clkgen.all;
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use gleichmann.multiio.all;
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-- pragma translate_off
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use std.textio.all;
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-- pragma translate_on
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entity MultiIO_APB is
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generic (
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hpe_version: integer := 0; -- adapt multiplexing for different boards
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pindex : integer := 0; -- Leon-Index
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paddr : integer := 0; -- Leon-Address
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pmask : integer := 16#FFF#; -- Leon-Mask
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pirq : integer := 0; -- Leon-IRQ
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clk_freq_in : integer := 25_000_000; -- Leons clock to calculate timings
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led7act : std_logic := '0'; -- active level for 7Segment
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ledact : std_logic := '0'; -- active level for LEDs
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switchact : std_logic := '1'; -- active level for LED's
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buttonact : std_logic := '1'; -- active level for LED's
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n_switches : integer := 8; -- number of switches that are driven
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n_leds : integer := 8 -- number of LEDs that are driven
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);
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port (
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rst_n : in std_ulogic; -- global Reset, active low
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clk : in std_ulogic; -- global Clock
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apbi : in apb_slv_in_type; -- APB-Input
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apbo : out apb_slv_out_type; -- APB-Output
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MultiIO_in : in MultiIO_in_type; -- MultIO-Inputs
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MultiIO_out : out MultiIO_out_type -- MultiIO-Outputs
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);
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end entity;
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architecture Implementation of MultiIO_APB is ----------------------
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constant VERSION : std_logic_vector(31 downto 0) := x"EA_07_12_06";
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constant REVISION : integer := 1;
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constant MUXMAX : integer := 7;
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constant VCC : std_logic_vector(31 downto 0) := (others => '1');
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constant GND : std_logic_vector(31 downto 0) := (others => '0');
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signal Enable1ms : boolean;
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signal MUXCounter : integer range 0 to MUXMAX-1;
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signal clkgen_mclk : std_ulogic;
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signal clkgen_bclk : std_ulogic;
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signal clkgen_sclk : std_ulogic;
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signal clkgen_lrclk : std_ulogic;
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type state_t is (WAIT_FOR_SYNC,READY,WAIT_FOR_ACK);
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signal state,next_state : state_t;
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signal Strobe,next_Strobe : std_ulogic;
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-- status signals of the i2s core for upper-level state machine
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signal SampleAck, WaitForSample : std_ulogic;
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signal samplereg : std_ulogic_vector(N_CODECI2SBITS-1 downto 0);
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constant pconfig : apb_config_type := (
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1 => apb_iobar(paddr, pmask)
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);
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type MultiIOregisters is
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record
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ledreg : std_logic_vector(31 downto 0); -- LEDs
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led7reg : std_logic_vector(31 downto 0); -- Dual 7Segment LEDs
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codecreg : std_logic_vector(31 downto 0);
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codecreg2 : std_logic_vector(31 downto 0);
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-- Switches in
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sw_inreg : std_logic_vector(31 downto 0);
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-- ASCII value of input button
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btn_inreg : std_logic_vector(31 downto 0);
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irqenareg : std_logic_vector(31 downto 0); -- IRQ enables for Buttons
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btn_irqs : std_logic_vector(31 downto 0); -- IRQs from each Button
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new_data : std_ulogic;
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-- new_data_valid : std_ulogic;
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lcdreg : std_logic_vector(31 downto 0); -- LCD instruction
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--cb1_in_reg : std_logic_vector(31 downto 0);
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--cb1_out_reg : std_logic_vector(31 downto 0);
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-- cb3_in_reg : std_logic_vector(31 downto 0);
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--cb4_in2_reg : std_logic_vector(31 downto 0);
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-- cb3_out_reg : std_logic_vector(31 downto 0);
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--cb4_out2_reg : std_logic_vector(31 downto 0);
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exp_in_reg : std_logic_vector(31 downto 0);
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exp_out_reg : std_logic_vector(31 downto 0);
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hsc_out_reg : std_logic_vector(31 downto 0);
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hsc_in_reg : std_logic_vector(31 downto 0);
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end record;
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signal r, rin : MultiIOregisters; -- register sets
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signal Key : std_logic_vector(7 downto 0); -- ASCII value of button
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-- character representation of the key (for simulation purposes)
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signal KeyVal : character;
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signal OldColumnRow1 : std_logic_vector(6 downto 0); -- for key debounce
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signal OldColumnRow2 : std_logic_vector(6 downto 0); -- for key debounce
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begin
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reg_rw : process(MUXCounter, MultiIO_in, apbi, key, r, rst_n)
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variable readdata : std_logic_vector(31 downto 0); -- system bus width
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variable irqs : std_logic_vector(31 downto 0); -- system IRQs width
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variable v : MultiIOregisters; -- register set
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begin
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v := r;
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-- reset registers
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if rst_n = '0' then
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-- lower half of LEDs on
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v.ledreg := (others => '0');
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v.ledreg(3 downto 0) := "1111";
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v.led7reg := (others => '0');
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v.led7reg(15 downto 0) := X"38_4F"; -- show "L3" Leon3 on 7Segments
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v.codecreg := (others => '0');
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v.codecreg2 := (others => '0');
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v.irqenareg := (others => '0'); -- IRQs disable
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v.btn_inreg := (others => '0');
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v.sw_inreg := (others => '0');
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-- new data flag off
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v.new_data := '0';
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-- v.new_data_valid := '0';
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v.lcdreg := (others => '0');
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-- v.cb3_in_reg := (others => '0');
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--v.cb4_in2_reg := (others => '0');
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-- v.cb3_out_reg := (others => '0');
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--v.cb4_out2_reg := (others => '0');
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v.exp_in_reg := (others => '0');
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v.exp_out_reg := (others => '0');
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v.hsc_in_reg := (others => '0');
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v.hsc_out_reg := (others => '0');
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end if;
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-- get switches and buttons
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if switchact = '1' then
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v.sw_inreg(N_SWITCHES-1 downto 0) := MultiIO_in.switch_in;
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else
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v.sw_inreg(N_SWITCHES-1 downto 0) := not MultiIO_in.switch_in;
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end if;
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v.btn_inreg(7 downto 0) := key;
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v.btn_irqs := (others => '0');
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---------------------------------------------------------------------------
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-- TO BE ALTERED
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---------------------------------------------------------------------------
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-- set local button-IRQs
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for i in 0 to v.btn_irqs'left loop
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-- detect low-to-high transition
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if (v.btn_inreg(i) = '1') and (r.btn_inreg(i) = '0') then
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-- set local IRQs if IRQ enabled
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v.btn_irqs(i) := v.btn_inreg(i) and r.irqenareg(i);
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else
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-- clear local IRQs
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v.btn_irqs(i) := '0';
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end if;
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end loop;
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---------------------------------------------------------------------------
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-- read registers
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readdata := (others => 'X');
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case conv_integer(apbi.paddr(6 downto 2)) is
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when 0 => readdata := r.ledreg; -- LEDs
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when 1 => readdata := r.led7reg; -- seven segment
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when 2 => readdata := r.codecreg; -- codec command register
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when 3 => readdata := r.codecreg2; -- codec i2s register
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when 4 => readdata := r.sw_inreg; -- switches
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when 5 => readdata := r.btn_inreg; -- buttons
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when 6 => readdata := r.irqenareg; -- IRQ enables
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when 7 => readdata := conv_std_logic_vector(pirq, 32); -- IRQ#
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when 8 => readdata := version; -- version
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when 9 => readdata := r.lcdreg; -- LCD data
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when 10 => readdata := r.exp_out_reg; -- expansion connector out
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when 11 => readdata := r.exp_in_reg; -- expansion connector in
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when 12 => readdata := r.hsc_out_reg;
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when 13 => readdata := r.hsc_in_reg;
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--when 14 => readdata := r.cb4_out1_reg; -- childboard4 connector out
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--when 15 => readdata := r.cb4_out2_reg; -- childboard4 connector out
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-- when 14 => readdata := r.cb3_in_reg; -- childboard3 connector in
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-- when 15 => readdata := r.cb3_out_reg; -- childboard3 connector out
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--when 14 => readdata := r.cb1_out_reg; -- childboard1 connector out
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--when 15 => readdata := r.cb1_in_reg; -- childboard1 connector in
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when others => null;
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end case;
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-- write registers
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if (apbi.psel(pindex) and apbi.penable and apbi.pwrite) = '1' then
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case conv_integer(apbi.paddr(6 downto 2)) is
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when 0 => v.ledreg :=
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GND(31 downto N_LEDS) &
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apbi.pwdata(N_LEDS-1 downto 0); -- write LEDs
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when 1 => v.led7reg :=
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GND(31 downto N_SEVSEGBITS) &
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apbi.pwdata(N_SEVSEGBITS-1 downto 0); -- write 7Segment
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when 2 => v.codecreg :=
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GND(31 downto N_CODECBITS) &
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apbi.pwdata(N_CODECBITS-1 downto 0);
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when 3 => v.codecreg2 :=
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GND(31 downto N_CODECI2SBITS) &
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apbi.pwdata(N_CODECI2SBITS-1 downto 0);
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when 6 => v.irqenareg :=
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GND(31 downto N_BUTTONS) &
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apbi.pwdata(N_BUTTONS-1 downto 0);
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when 9 => v.lcdreg :=
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GND(31 downto N_LCDBITS) &
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apbi.pwdata(N_LCDBITS-1 downto 0);
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-- signal that new data has arrived
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-- v.new_data_valid := '0';
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v.new_data := '1';
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when 10 => v.exp_out_reg :=
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GND(31 downto N_EXPBITS/2) &
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-- bit(N_EXPBITS) holds enable signal
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apbi.pwdata(N_EXPBITS/2-1 downto 0);
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when 12 => v.hsc_out_reg :=
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GND(31 downto N_HSCBITS) &
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apbi.pwdata(N_HSCBITS-1 downto 0);
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--when 14 => v.cb4_out1_reg :=
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-- apbi.pwdata(31 downto 0);
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-- when 15 => v.cb3_out_reg :=
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-- apbi.pwdata(31 downto 0);
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--when 14 => v.exp_out_reg :=
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-- GND(31 downto 13) &
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-- -- bit(N_EXPBITS) holds enable signal
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-- apbi.pwdata(12 downto 0);
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when others => null;
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end case;
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end if;
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-- set PIRQ
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irqs := (others => '0');
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for i in 0 to v.btn_irqs'left loop
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-- set IRQ if button-i pressed and IRQ enabled
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irqs(pirq) := irqs(pirq) or r.btn_irqs(i);
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end loop;
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if ledact = '1' then
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MultiIO_out.led_out <= r.ledreg(N_LEDS-1 downto 0); -- not inverted
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else
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MultiIO_out.led_out <= not r.ledreg(N_LEDS-1 downto 0); -- inverted
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end if;
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-- disable seven segment and LC display by default
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-- MultiIO_out.lcd_enable <= '0';
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MultiIO_out.lcd_rw <= r.lcdreg(8);
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MultiIO_out.lcd_regsel <= r.lcdreg(9);
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-- reset new lcd data flag
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-- will be enabled when new data are written to the LCD register
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if MUXCounter = 4 then
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v.new_data := '0';
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-- v.serviced := '1';
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end if;
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-- register inputs from expansion connector
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v.exp_in_reg(N_EXPBITS/2-1 downto 0) := MultiIO_in.exp_in;
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MultiIO_out.exp_out <= r.exp_out_reg(N_EXPBITS/2-1 downto 0);
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-- high-speed connector
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v.hsc_in_reg(N_HSCBITS-1 downto 0) := MultiIO_in.hsc_in;
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MultiIO_out.hsc_out <= r.hsc_out_reg(N_HSCBITS-1 downto 0);
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-- configure control port of audio codec for SPI mode
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MultiIO_out.codec_mode <= '1';
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apbo.prdata <= readdata; -- output data to Leon
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apbo.pirq <= irqs; -- output IRQs to Leon
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apbo.pindex <= pindex; -- output index to Leon
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rin <= v; -- update registers
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end process;
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apbo.pconfig <= pconfig; -- output config to Leon
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regs : process(clk) -- update registers
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begin
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329 |
|
|
if rising_edge(clk) then
|
330 |
|
|
r <= rin;
|
331 |
|
|
end if;
|
332 |
|
|
end process;
|
333 |
|
|
|
334 |
|
|
|
335 |
|
|
KeyBoard : process(clk, rst_n)
|
336 |
|
|
variable ColumnStrobe : std_logic_vector(2 downto 0);
|
337 |
|
|
variable FirstTime : boolean;
|
338 |
|
|
variable NewColumnRow : std_logic_vector(6 downto 0);
|
339 |
|
|
begin
|
340 |
|
|
if rst_n = '0' then
|
341 |
|
|
MultiIO_out.column_out <= (others => '0'); -- all column off
|
342 |
|
|
Key <= X"40"; -- default '@' after Reset and no key pressed
|
343 |
|
|
OldColumnRow1 <= "1111111";
|
344 |
|
|
OldColumnRow2 <= "1110011";
|
345 |
|
|
ColumnStrobe := "001";
|
346 |
|
|
FirstTime := true;
|
347 |
|
|
elsif rising_edge(clk) then
|
348 |
|
|
if Enable1ms then
|
349 |
|
|
if MultiIO_in.row_in = "0000" then -- no key pressed
|
350 |
|
|
ColumnStrobe := ColumnStrobe(1) & ColumnStrobe(0) & ColumnStrobe(2); -- rotate column
|
351 |
|
|
MultiIO_out.column_out <= ColumnStrobe;
|
352 |
|
|
|
353 |
|
|
if not FirstTime then
|
354 |
|
|
Key <= X"3F"; -- no key pressed '?'
|
355 |
|
|
end if;
|
356 |
|
|
|
357 |
|
|
else -- key pressed
|
358 |
|
|
OldColumnRow2 <= OldColumnRow1;
|
359 |
|
|
|
360 |
|
|
-- check whether button inputs produce a high or a
|
361 |
|
|
-- low level, then assign these inputs in order that
|
362 |
|
|
-- they can be decoded into ASCII format
|
363 |
|
|
if buttonact = '1' then
|
364 |
|
|
NewColumnRow := ColumnStrobe & MultiIO_in.row_in;
|
365 |
|
|
else
|
366 |
|
|
NewColumnRow := ColumnStrobe & not MultiIO_in.row_in;
|
367 |
|
|
end if;
|
368 |
|
|
|
369 |
|
|
OldColumnRow1 <= NewColumnRow;
|
370 |
|
|
|
371 |
|
|
if (ColumnStrobe & MultiIO_in.row_in = OldColumnRow1) and
|
372 |
|
|
(OldColumnRow1 = OldColumnRow2)
|
373 |
|
|
then -- debounced
|
374 |
|
|
FirstTime := false; -- 1st valid key pressed
|
375 |
|
|
|
376 |
|
|
case OldColumnRow2 is -- decode keys into ascii characters
|
377 |
|
|
when "0010001" => Key <= x"31"; -- 1
|
378 |
|
|
when "0010010" => Key <= x"34"; -- 4
|
379 |
|
|
when "0010100" => Key <= x"37"; -- 7
|
380 |
|
|
when "0011000" => Key <= x"43"; -- C
|
381 |
|
|
when "0100001" => Key <= x"32"; -- 2
|
382 |
|
|
when "0100010" => Key <= x"35"; -- 5
|
383 |
|
|
when "0100100" => Key <= x"38"; -- 8
|
384 |
|
|
when "0101000" => Key <= x"30"; -- 0
|
385 |
|
|
when "1000001" => Key <= x"33"; -- 3
|
386 |
|
|
when "1000010" => Key <= x"36"; -- 6
|
387 |
|
|
when "1000100" => Key <= x"39"; -- 9
|
388 |
|
|
when "1001000" => Key <= x"45"; -- E
|
389 |
|
|
when others => Key <= x"39"; -- ? -- more than one key pressed
|
390 |
|
|
end case;
|
391 |
|
|
else
|
392 |
|
|
Key <= x"3D"; -- '=' -- bouncing
|
393 |
|
|
end if; -- debounce
|
394 |
|
|
end if; -- MultiIO_in.row_in
|
395 |
|
|
end if; -- Enable1ms
|
396 |
|
|
end if; -- rst_n
|
397 |
|
|
end process KeyBoard;
|
398 |
|
|
|
399 |
|
|
Multiplex3Sources : if hpe_version = midi generate
|
400 |
|
|
Multiplex : process(MUXCounter, r)
|
401 |
|
|
begin
|
402 |
|
|
-- disable LED output by default
|
403 |
|
|
MultiIO_out.led_enable <= '0' xnor ledact;
|
404 |
|
|
-- disable 7-segment display by default
|
405 |
|
|
MultiIO_out.led_ca_out <= "00" xnor (led7act & led7act);
|
406 |
|
|
|
407 |
|
|
-- set enable signal in the middle of LCD timeslots
|
408 |
|
|
if MUXCounter = 3 then
|
409 |
|
|
MultiIO_out.lcd_enable <= '1';
|
410 |
|
|
else
|
411 |
|
|
MultiIO_out.lcd_enable <= '0';
|
412 |
|
|
end if;
|
413 |
|
|
|
414 |
|
|
case MUXCounter is
|
415 |
|
|
when 0 | 1 =>
|
416 |
|
|
-- output logical value according to active level of the 7segment display
|
417 |
|
|
MultiIO_out.led_a_out <= r.led7reg(MUXCounter*8 + 0) xnor led7act;
|
418 |
|
|
MultiIO_out.led_b_out <= r.led7reg(MUXCounter*8 + 1) xnor led7act;
|
419 |
|
|
MultiIO_out.led_c_out <= r.led7reg(MUXCounter*8 + 2) xnor led7act;
|
420 |
|
|
MultiIO_out.led_d_out <= r.led7reg(MUXCounter*8 + 3) xnor led7act;
|
421 |
|
|
MultiIO_out.led_e_out <= r.led7reg(MUXCounter*8 + 4) xnor led7act;
|
422 |
|
|
MultiIO_out.led_f_out <= r.led7reg(MUXCounter*8 + 5) xnor led7act;
|
423 |
|
|
MultiIO_out.led_g_out <= r.led7reg(MUXCounter*8 + 6) xnor led7act;
|
424 |
|
|
MultiIO_out.led_dp_out <= r.led7reg(MUXCounter*8 + 7) xnor led7act;
|
425 |
|
|
-- selectively enable the current digit
|
426 |
|
|
for i in 0 to 1 loop
|
427 |
|
|
if i = MUXCounter then
|
428 |
|
|
MultiIO_out.led_ca_out(i) <= '1' xnor led7act;
|
429 |
|
|
else
|
430 |
|
|
MultiIO_out.led_ca_out(i) <= '0' xnor led7act;
|
431 |
|
|
end if;
|
432 |
|
|
end loop; -- i
|
433 |
|
|
when 2 | 3 | 4 =>
|
434 |
|
|
MultiIO_out.led_a_out <= r.lcdreg(0);
|
435 |
|
|
MultiIO_out.led_b_out <= r.lcdreg(1);
|
436 |
|
|
MultiIO_out.led_c_out <= r.lcdreg(2);
|
437 |
|
|
MultiIO_out.led_d_out <= r.lcdreg(3);
|
438 |
|
|
MultiIO_out.led_e_out <= r.lcdreg(4);
|
439 |
|
|
MultiIO_out.led_f_out <= r.lcdreg(5);
|
440 |
|
|
MultiIO_out.led_g_out <= r.lcdreg(6);
|
441 |
|
|
MultiIO_out.led_dp_out <= r.lcdreg(7);
|
442 |
|
|
when 5 | 6 =>
|
443 |
|
|
MultiIO_out.led_enable <= '1' xnor ledact;
|
444 |
|
|
MultiIO_out.led_a_out <= r.ledreg(0) xnor ledact;
|
445 |
|
|
MultiIO_out.led_b_out <= r.ledreg(1) xnor ledact;
|
446 |
|
|
MultiIO_out.led_c_out <= r.ledreg(2) xnor ledact;
|
447 |
|
|
MultiIO_out.led_d_out <= r.ledreg(3) xnor ledact;
|
448 |
|
|
MultiIO_out.led_e_out <= r.ledreg(4) xnor ledact;
|
449 |
|
|
MultiIO_out.led_f_out <= r.ledreg(5) xnor ledact;
|
450 |
|
|
MultiIO_out.led_g_out <= r.ledreg(6) xnor ledact;
|
451 |
|
|
MultiIO_out.led_dp_out <= r.ledreg(7) xnor ledact;
|
452 |
|
|
when others =>
|
453 |
|
|
null;
|
454 |
|
|
end case;
|
455 |
|
|
end process Multiplex;
|
456 |
|
|
end generate Multiplex3Sources;
|
457 |
|
|
|
458 |
|
|
Multiplex2Sources : if hpe_version /= midi generate
|
459 |
|
|
Multiplex : process(MUXCounter, r)
|
460 |
|
|
begin
|
461 |
|
|
-- disable LED output by default
|
462 |
|
|
MultiIO_out.led_enable <= '0' xnor ledact;
|
463 |
|
|
-- disable 7-segment display by default
|
464 |
|
|
MultiIO_out.led_ca_out <= "00" xnor (led7act & led7act);
|
465 |
|
|
|
466 |
|
|
-- set enable signal in the middle of LCD timeslots
|
467 |
|
|
if MUXCounter = 3 then
|
468 |
|
|
MultiIO_out.lcd_enable <= '1';
|
469 |
|
|
else
|
470 |
|
|
MultiIO_out.lcd_enable <= '0';
|
471 |
|
|
end if;
|
472 |
|
|
|
473 |
|
|
case MUXCounter is
|
474 |
|
|
when 0 | 1 =>
|
475 |
|
|
-- output logical value according to active level of the 7segment display
|
476 |
|
|
MultiIO_out.led_a_out <= r.led7reg(MUXCounter*8 + 0) xnor led7act;
|
477 |
|
|
MultiIO_out.led_b_out <= r.led7reg(MUXCounter*8 + 1) xnor led7act;
|
478 |
|
|
MultiIO_out.led_c_out <= r.led7reg(MUXCounter*8 + 2) xnor led7act;
|
479 |
|
|
MultiIO_out.led_d_out <= r.led7reg(MUXCounter*8 + 3) xnor led7act;
|
480 |
|
|
MultiIO_out.led_e_out <= r.led7reg(MUXCounter*8 + 4) xnor led7act;
|
481 |
|
|
MultiIO_out.led_f_out <= r.led7reg(MUXCounter*8 + 5) xnor led7act;
|
482 |
|
|
MultiIO_out.led_g_out <= r.led7reg(MUXCounter*8 + 6) xnor led7act;
|
483 |
|
|
MultiIO_out.led_dp_out <= r.led7reg(MUXCounter*8 + 7) xnor led7act;
|
484 |
|
|
-- selectively enable the current digit
|
485 |
|
|
for i in 0 to 1 loop
|
486 |
|
|
if i = MUXCounter then
|
487 |
|
|
MultiIO_out.led_ca_out(i) <= '1' xnor led7act;
|
488 |
|
|
else
|
489 |
|
|
MultiIO_out.led_ca_out(i) <= '0' xnor led7act;
|
490 |
|
|
end if;
|
491 |
|
|
end loop; -- i
|
492 |
|
|
|
493 |
|
|
when others =>
|
494 |
|
|
MultiIO_out.led_a_out <= r.lcdreg(0);
|
495 |
|
|
MultiIO_out.led_b_out <= r.lcdreg(1);
|
496 |
|
|
MultiIO_out.led_c_out <= r.lcdreg(2);
|
497 |
|
|
MultiIO_out.led_d_out <= r.lcdreg(3);
|
498 |
|
|
MultiIO_out.led_e_out <= r.lcdreg(4);
|
499 |
|
|
MultiIO_out.led_f_out <= r.lcdreg(5);
|
500 |
|
|
MultiIO_out.led_g_out <= r.lcdreg(6);
|
501 |
|
|
MultiIO_out.led_dp_out <= r.lcdreg(7);
|
502 |
|
|
end case;
|
503 |
|
|
end process Multiplex;
|
504 |
|
|
end generate Multiplex2Sources;
|
505 |
|
|
|
506 |
|
|
|
507 |
|
|
-- generate prescaler signal every 100 ms
|
508 |
|
|
-- control MUXCounter according to input and board type
|
509 |
|
|
Count1ms : process(clk, rst_n)
|
510 |
|
|
constant divider100ms : integer := clk_freq_in / 10_000;
|
511 |
|
|
variable frequency_counter : integer range 0 to Divider100ms;
|
512 |
|
|
begin
|
513 |
|
|
if rst_n = '0' then
|
514 |
|
|
frequency_counter := Divider100ms;
|
515 |
|
|
Enable1ms <= false;
|
516 |
|
|
MUXCounter <= 0;
|
517 |
|
|
elsif rising_edge(clk) then
|
518 |
|
|
if frequency_counter = 0 then -- 1-ms counter has expired
|
519 |
|
|
frequency_counter := Divider100ms;
|
520 |
|
|
Enable1ms <= true;
|
521 |
|
|
|
522 |
|
|
if (hpe_version = midi) then
|
523 |
|
|
-- skip LCD control sequence and go to
|
524 |
|
|
-- LED control
|
525 |
|
|
if (MUXCounter = 1 and r.new_data = '0') then
|
526 |
|
|
MUXCounter <= 5;
|
527 |
|
|
-- overflow at maximum counter value for Hpe_midi
|
528 |
|
|
elsif MUXCounter = MUXMAX-1 then
|
529 |
|
|
MUXCounter <= 0;
|
530 |
|
|
else
|
531 |
|
|
MUXCounter <= MUXCounter + 1;
|
532 |
|
|
end if;
|
533 |
|
|
elsif (hpe_version /= midi) then
|
534 |
|
|
-- skip LCD control sequence and go back to
|
535 |
|
|
-- 7-segment control
|
536 |
|
|
if (MUXCounter = 1 and r.new_data = '0') then
|
537 |
|
|
MUXCounter <= 0;
|
538 |
|
|
-- overflow at maximum counter value for Hpe_mini
|
539 |
|
|
elsif MUXCounter = MUXMAX-3 then
|
540 |
|
|
MUXCounter <= 0;
|
541 |
|
|
else
|
542 |
|
|
MUXCounter <= MUXCounter + 1;
|
543 |
|
|
end if;
|
544 |
|
|
end if;
|
545 |
|
|
|
546 |
|
|
else
|
547 |
|
|
frequency_counter := frequency_counter - 1;
|
548 |
|
|
Enable1ms <= false;
|
549 |
|
|
end if;
|
550 |
|
|
end if;
|
551 |
|
|
end process;
|
552 |
|
|
|
553 |
|
|
---------------------------------------------------------------------------------------
|
554 |
|
|
-- AUDIO CODEC SECTION
|
555 |
|
|
---------------------------------------------------------------------------------------
|
556 |
|
|
|
557 |
|
|
tlv320aic23b_audio : if hpe_version = mini_altera generate
|
558 |
|
|
|
559 |
|
|
-- audio clock generation
|
560 |
|
|
clk_gen : ClockGenerator
|
561 |
|
|
port map (
|
562 |
|
|
Clk => clk,
|
563 |
|
|
Reset => rst_n,
|
564 |
|
|
omclk => clkgen_mclk,
|
565 |
|
|
obclk => clkgen_bclk,
|
566 |
|
|
osclk => clkgen_sclk,
|
567 |
|
|
olrcout => clkgen_lrclk);
|
568 |
|
|
|
569 |
|
|
-- drive clock signals by clock generator
|
570 |
|
|
MultiIO_out.CODEC_SCLK <= clkgen_sclk;
|
571 |
|
|
MultiIO_out.CODEC_MCLK <= clkgen_mclk;
|
572 |
|
|
MultiIO_out.CODEC_BCLK <= clkgen_bclk;
|
573 |
|
|
MultiIO_out.CODEC_LRCIN <= clkgen_lrclk;
|
574 |
|
|
MultiIO_out.CODEC_LRCOUT <= clkgen_lrclk;
|
575 |
|
|
|
576 |
|
|
-- SPI control interface
|
577 |
|
|
spi_xmit_1 : spi_xmit
|
578 |
|
|
generic map (
|
579 |
|
|
data_width => N_CODECBITS)
|
580 |
|
|
port map (
|
581 |
|
|
clk_i => clkgen_SCLK,
|
582 |
|
|
rst_i => rst_n,
|
583 |
|
|
data_i => r.codecreg(N_CODECBITS-1 downto 0),
|
584 |
|
|
CODEC_SDIN => MultiIO_out.CODEC_SDIN,
|
585 |
|
|
CODEC_CS => MultiIO_out.CODEC_CS);
|
586 |
|
|
|
587 |
|
|
-- I2C data interface
|
588 |
|
|
ParToI2s_1 : ParToI2s
|
589 |
|
|
generic map (
|
590 |
|
|
SampleSize_g => N_CODECI2SBITS)
|
591 |
|
|
port map (
|
592 |
|
|
Clk_i => clk,
|
593 |
|
|
Reset_i => rst_n,
|
594 |
|
|
SampleLeft_i => SampleReg,
|
595 |
|
|
SampleRight_i => SampleReg,
|
596 |
|
|
StrobeLeft_i => Strobe,
|
597 |
|
|
StrobeRight_i => Strobe,
|
598 |
|
|
SampleAck_o => SampleAck,
|
599 |
|
|
WaitForSample_o => WaitForSample,
|
600 |
|
|
SClk_i => clkgen_sclk,
|
601 |
|
|
LRClk_i => clkgen_lrclk,
|
602 |
|
|
SdnyData_o => MultiIO_out.CODEC_DIN);
|
603 |
|
|
|
604 |
|
|
audio_ctrl_sm : process(SampleAck, WaitForSample, state)
|
605 |
|
|
begin
|
606 |
|
|
next_state <= state;
|
607 |
|
|
next_Strobe <= '0';
|
608 |
|
|
case state is
|
609 |
|
|
when WAIT_FOR_SYNC =>
|
610 |
|
|
if WaitForSample = '1' then
|
611 |
|
|
next_state <= READY;
|
612 |
|
|
end if;
|
613 |
|
|
when READY =>
|
614 |
|
|
next_state <= WAIT_FOR_ACK;
|
615 |
|
|
next_Strobe <= '1';
|
616 |
|
|
when WAIT_FOR_ACK =>
|
617 |
|
|
if SampleAck = '1' then
|
618 |
|
|
next_state <= READY;
|
619 |
|
|
end if;
|
620 |
|
|
when others =>
|
621 |
|
|
next_state <= WAIT_FOR_SYNC;
|
622 |
|
|
end case;
|
623 |
|
|
end process;
|
624 |
|
|
|
625 |
|
|
audio_ctrl_reg : process(clk, rst_n)
|
626 |
|
|
begin
|
627 |
|
|
if rst_n = '0' then -- asynchronous reset
|
628 |
|
|
state <= WAIT_FOR_SYNC;
|
629 |
|
|
Strobe <= '0';
|
630 |
|
|
SampleReg <= (others => '0');
|
631 |
|
|
elsif clk'event and clk = '1' then
|
632 |
|
|
state <= next_state;
|
633 |
|
|
Strobe <= next_Strobe;
|
634 |
|
|
if (next_Strobe) = '1' then
|
635 |
|
|
-- if Mode = '0' then
|
636 |
|
|
-- SampleReg <= std_ulogic_vector(unsigned(AudioSample)- X"80");
|
637 |
|
|
-- else
|
638 |
|
|
-- SampleReg <= AudioSample;
|
639 |
|
|
-- end if;
|
640 |
|
|
SampleReg <= std_ulogic_vector(r.codecreg2(N_CODECI2SBITS-1 downto 0));
|
641 |
|
|
end if;
|
642 |
|
|
end if;
|
643 |
|
|
end process;
|
644 |
|
|
|
645 |
|
|
end generate tlv320aic23b_audio;
|
646 |
|
|
|
647 |
|
|
|
648 |
|
|
---------------------------------------------------------------------------------------
|
649 |
|
|
-- DEBUG SECTION
|
650 |
|
|
---------------------------------------------------------------------------------------
|
651 |
|
|
|
652 |
|
|
-- pragma translate_off
|
653 |
|
|
KeyVal <=
|
654 |
|
|
ascii2char(conv_integer(Key)) when
|
655 |
|
|
(conv_integer(Key) >= 16#30#) and (conv_integer(Key) <= 16#46#)
|
656 |
|
|
else 'U';
|
657 |
|
|
|
658 |
|
|
bootmsg : report_version
|
659 |
|
|
generic map ("MultiIO_APB6:" & tost(pindex) &
|
660 |
|
|
", Human Interface Controller rev " & tost(REVISION) &
|
661 |
|
|
", IRQ " & tost(pirq));
|
662 |
|
|
-- pragma translate_on
|
663 |
|
|
|
664 |
|
|
end architecture;
|