redpitaya-puzzlefw/fpga/rtl/puzzlefw_pkg.vhd

--
--  Global definitions for Red Pitaya PuzzleFW firmware.
--
--  Joris van Rantwijk 2024
--

library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;


package puzzlefw_pkg is

    -- 32-bit address for DMA on AXI bus, aligned to 8-byte multiple.
    subtype dma_address_type is std_logic_vector(31 downto 3);
    type dma_address_array is array(natural range <>) of dma_address_type;

    -- Burst length for DMA on AXI bus as number of beats minus 1.
    subtype dma_burst_length_type is std_logic_vector(3 downto 0);
    type dma_burst_length_array is array (natural range <>) of dma_burst_length_type;

    -- 64-bit data for DMA on AXI bus.
    subtype dma_data_type is std_logic_vector(63 downto 0);
    type dma_data_array is array(natural range <>) of dma_data_type;

    -- 14-bit ADC data.
    constant adc_data_bits: integer := 14;
    subtype adc_data_type is std_logic_vector(adc_data_bits - 1 downto 0);
    type adc_data_array is array(natural range <>) of adc_data_type;

    -- 24-bit averaged data.
    constant sample_data_bits: integer := 24;
    subtype sample_data_type is std_logic_vector(sample_data_bits - 1 downto 0);
    type sample_data_array is array(natural range <>) of sample_data_type;

    -- 48-bit timestamp.
    constant timestamp_bits: integer := 48;

    -- ADC input port type.
    type adc_data_input_type is array(0 to 1) of std_logic_vector(15 downto 0);

    -- Register addresses.
    constant reg_addr_mask:         std_logic_vector(31 downto 0) := x"0010fffc";
    constant reg_info:              natural := 16#000000#;
    constant reg_irq_enable:        natural := 16#000010#;
    constant reg_irq_pending:       natural := 16#000014#;
    constant reg_dma_en:            natural := 16#000100#;
    constant reg_dma_status:        natural := 16#000104#;
    constant reg_dma_clear:         natural := 16#000108#;
    constant reg_timestamp_lo:      natural := 16#000180#;
    constant reg_timestamp_hi:      natural := 16#000184#;
    constant reg_timestamp_clear:   natural := 16#000188#;
    constant reg_acq_addr_start:    natural := 16#000200#;
    constant reg_acq_addr_end:      natural := 16#000204#;
    constant reg_acq_addr_limit:    natural := 16#000208#;
    constant reg_acq_addr_intr:     natural := 16#00020c#;
    constant reg_acq_addr_ptr:      natural := 16#000210#;
    constant reg_acq_dma_ctrl:      natural := 16#000214#;
    constant reg_acq_intr_ctrl:     natural := 16#000218#;
    constant reg_acq_dma_status:    natural := 16#00021c#;
    constant reg_acquisition_en:    natural := 16#000220#;
    constant reg_record_length:     natural := 16#000224#;
    constant reg_decimation_factor: natural := 16#000228#;
    constant reg_shift_steps:       natural := 16#00022c#;
    constant reg_averaging_en:      natural := 16#000230#;
    constant reg_ch4_mode:          natural := 16#000234#;
    constant reg_simulate_adc:      natural := 16#000238#;
    constant reg_trigger_mode:      natural := 16#000240#;
    constant reg_trigger_delay:     natural := 16#000244#;
    constant reg_trigger_status:    natural := 16#000248#;
    constant reg_adc_sample:        natural := 16#000280#;
    constant reg_adc23_sample:      natural := 16#000284#;
    constant reg_adc_range_clear:   natural := 16#00028c#;
    constant reg_adc0_minmax:       natural := 16#000290#;
    constant reg_adc1_minmax:       natural := 16#000294#;
    constant reg_adc2_minmax:       natural := 16#000298#;
    constant reg_adc3_minmax:       natural := 16#00029c#;
    constant reg_test_led:          natural := 16#000404#;
    constant reg_test_divider:      natural := 16#000408#;
    constant reg_dma_buf_addr:      natural := 16#100000#;
    constant reg_dma_buf_size:      natural := 16#100004#;

    -- Firmware info word.
    constant fw_api_version:        natural := 1;
    constant fw_version_major:      natural := 0;
    constant fw_version_minor:      natural := 4;
    constant fw_info_word:          std_logic_vector(31 downto 0) :=
        x"4a"
        & std_logic_vector(to_unsigned(fw_api_version, 8))
        & std_logic_vector(to_unsigned(fw_version_major, 8))
        & std_logic_vector(to_unsigned(fw_version_minor, 8));

    -- Data stream.
    constant msg_adc_data:          std_logic_vector(7 downto 0) := x"01";
    constant msg_trigger:           std_logic_vector(7 downto 0) := x"02";
    constant msg_overflow:          std_logic_vector(7 downto 0) := x"10";

    -- Control registers: read/write access by processor, output signals to FPGA.
    type registers_control is record
        irq_enable:         std_logic;
        test_led:           std_logic_vector(7 downto 0);
        test_divider:       std_logic_vector(15 downto 0);
        dma_en:             std_logic;
        dma_clear:          std_logic;              -- single cycle
        timestamp_clear:    std_logic;              -- single cycle
        acq_addr_start:     std_logic_vector(31 downto 7);
        acq_addr_end:       std_logic_vector(31 downto 7);
        acq_addr_limit:     std_logic_vector(31 downto 7);
        acq_addr_intr:      std_logic_vector(31 downto 3);
        acq_dma_en:         std_logic;
        acq_dma_init:       std_logic;              -- single cycle
        acq_intr_en:        std_logic;
        acq_intr_clear:     std_logic;              -- single cycle
        acquisition_en:     std_logic;
        record_length:      std_logic_vector(15 downto 0);
        decimation_factor:  std_logic_vector(17 downto 0);
        shift_steps:        std_logic_vector(3 downto 0);
        averaging_en:       std_logic;
        ch4_mode:           std_logic;
        simulate_adc:       std_logic;
        trig_auto_en:       std_logic;
        trig_ext_en:        std_logic;
        trig_force:         std_logic;              -- single cycle
        trig_ext_select:    std_logic_vector(1 downto 0);
        trig_ext_falling:   std_logic;
        trigger_delay:      std_logic_vector(15 downto 0);
        adc_range_clear:    std_logic;
        dma_buf_addr:       std_logic_vector(31 downto 12);
        dma_buf_size:       std_logic_vector(31 downto 12);
    end record;

    -- Status registers: input signals from FPGA, read-only access by processor.
    type registers_status is record
        irq_pending:        std_logic_vector(0 downto 0);
        dma_busy:           std_logic;
        dma_err_read:       std_logic;
        dma_err_write:      std_logic;
        dma_err_address:    std_logic;
        dma_err_any:        std_logic;
        timestamp:          std_logic_vector(timestamp_bits - 1 downto 0);
        acq_addr_ptr:       std_logic_vector(31 downto 3);
        acq_dma_busy:       std_logic;
        trig_waiting:       std_logic;
        adc_sample:         adc_data_array(0 to 3);
        adc_min_value:      adc_data_array(0 to 3);
        adc_max_value:      adc_data_array(0 to 3);
    end record;

    constant registers_control_init: registers_control := (
        irq_enable          => '0',
        test_led            => (others => '0'),
        test_divider        => (others => '0'),
        dma_en              => '0',
        dma_clear           => '0',
        timestamp_clear     => '0',
        acq_addr_start      => (others => '0'),
        acq_addr_end        => (others => '0'),
        acq_addr_limit      => (others => '0'),
        acq_addr_intr       => (others => '0'),
        acq_dma_en          => '0',
        acq_dma_init        => '0',
        acq_intr_en         => '0',
        acq_intr_clear      => '0',
        acquisition_en      => '0',
        record_length       => (others => '0'),
        decimation_factor   => (others => '0'),
        shift_steps         => (others => '0'),
        averaging_en        => '0',
        ch4_mode            => '0',
        simulate_adc        => '0',
        trig_auto_en        => '0',
        trig_ext_en         => '0',
        trig_force          => '0',
        trig_ext_select     => (others => '0'),
        trig_ext_falling    => '0',
        trigger_delay       => (others => '0'),
        adc_range_clear     => '0',
        dma_buf_addr        => (others => '0'),
        dma_buf_size        => (others => '0')
    );

end package;