Add Observer Ignition Target

hdl/projects/cosmo_ignition/cosmo_ignition_top.vhd

@@ -53,7 +53,7 @@ end entity;
 architecture rtl of cosmo_ignition_top is
     signal sw0_serial_in : std_logic;
     signal sw0_serial_out : std_logic;
-    signal sw1_serial_in : std_logic := '0';
+    signal sw1_serial_in : std_logic;
     signal sw1_serial_out : std_logic;
     signal hotswap_restart_l : std_logic;
     signal led_counter : unsigned(24 downto 0) := (others => '0');

hdl/projects/observer_ignition/BUCK

@@ -0,0 +1,22 @@
+load("//tools:hdl.bzl", "vhdl_unit")
+load("//tools:yosys.bzl", "ice40_bitstream")
+
+
+vhdl_unit(
+    name = "observer_ignition_top",
+    srcs = glob(["*.vhd"]),
+    deps = [
+        "//hdl/ip/vhd/ignition/target:ignition_target_common",
+        "//hdl/ip/vhd/ignition/target:ignition_io",
+    ],
+    standard = "2008",
+)
+
+ice40_bitstream(
+    name="observer_ignition",
+    top_entity_name="observer_ignition_top",
+    top= ":observer_ignition_top",
+    family="hx8k",
+    package="bg121",
+    pinmap="observer_ignition.pcf"
+)

hdl/projects/observer_ignition/observer_ignition.pcf

@@ -0,0 +1,46 @@
+set_io --warn-no-port ign_trgt_fpga_debug_led[0] A11
+set_io --warn-no-port ign_trgt_fpga_debug_led[1] A10
+set_io --warn-no-port ign_trgt_fpga_debug_led[2] C9
+set_io --warn-no-port ign_trgt_fpga_debug_led[3] B9
+set_io --warn-no-port ign_trgt_fpga_spare_v3p3[0] B8
+set_io --warn-no-port ign_trgt_fpga_spare_v3p3[1] A9
+set_io --warn-no-port ign_trgt_fpga_spare_v3p3[2] C8
+set_io --warn-no-port ign_trgt_fpga_spare_v3p3[3] D7
+set_io --warn-no-port ign_trgt_fpga_spare_v3p3[4] A8
+set_io --warn-no-port ign_trgt_fpga_spare_v3p3[5] C7
+set_io --warn-no-port ign_trgt_fpga_spare_v3p3[6] A7
+set_io --warn-no-port ign_trgt_fpga_spare_v3p3[7] B7
+set_io --warn-no-port clk_50mhz_ign_trgt_fpga B6
+set_io --warn-no-port ign_trgt_id[0] A5
+set_io --warn-no-port ign_trgt_id[1] B5
+set_io --warn-no-port ign_trgt_id[2] A4
+set_io --warn-no-port ign_trgt_id[3] B4
+set_io --warn-no-port ign_trgt_id[4] A3
+set_io --warn-no-port ign_trgt_id[5] B3
+set_io --warn-no-port ign_trgt_id[6] A2
+set_io --warn-no-port ign_trgt_id[7] A1
+set_io --warn-no-port ign_trgt_fpga_lvds_status_led_en_l L1
+set_io --warn-no-port a2_power_status_l L2
+set_io --warn-no-port ign_trgt_fpga_pushbutton_reset_l L5
+set_io --warn-no-port ign_trgt_fpga_design_reset_l K6
+set_io --warn-no-port lvds_rsw0_to_ign_trgt_fpga_p B2
+# inferred by fitter, not allowed to define
+#set_io --warn-no-port lvds_rsw0_to_ign_trgt_fpga_n B1
+set_io --warn-no-port lvds_ign_trgt_fpga_to_rsw0_p C2
+set_io --warn-no-port lvds_ign_trgt_fpga_to_rsw0_n C1
+set_io --warn-no-port lvds_rsw1_to_ign_trgt_fpga_p G2
+# inferred by fitter, not allowed to define
+#set_io --warn-no-port lvds_rsw1_to_ign_trgt_fpga_n G1
+set_io --warn-no-port lvds_ign_trgt_fpga_to_rsw1_p H1
+set_io --warn-no-port lvds_ign_trgt_fpga_to_rsw1_n H2
+set_io --warn-no-port v3p3_fpga2_a2_pg J11
+set_io --warn-no-port v1p2_fpga2_a2_pg K11
+set_io --warn-no-port v2p5_fpga2_a2_pg H10
+set_io --warn-no-port a2_en G10
+set_io --warn-no-port v3p3_sys_a2_pg D10
+set_io --warn-no-port v1p0_mgmt_a2_pg E11
+set_io --warn-no-port v2p5_mgmt_a2_pg D9
+set_io --warn-no-port sp_fault_l C11
+set_io --warn-no-port rot_fault_l B11
+
+set_frequency clk_50mhz_ign_trgt_fpga 50

hdl/projects/observer_ignition/observer_ignition_top.vhd

@@ -0,0 +1,130 @@
+-- This Source Code Form is subject to the terms of the Mozilla Public
+-- License, v. 2.0. If a copy of the MPL was not distributed with this
+-- file, You can obtain one at https://mozilla.org/MPL/2.0/.
+--
+-- Copyright 2026 Oxide Computer Company
+
+-- Observer power shelf controller FPGA targeting an ice40 HX8k
+
+
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+use work.ignition_pkg.all;
+
+
+entity observer_ignition_top is
+    port (
+        clk_50mhz_ign_trgt_fpga : in std_logic;
+        ign_trgt_fpga_design_reset_l : in std_logic;
+        ign_trgt_fpga_debug_led : out std_logic_vector(3 downto 0);
+        ign_trgt_fpga_spare_v3p3 : out std_logic_vector(7 downto 0);
+        ign_trgt_id : in std_logic_vector(7 downto 0);
+        ign_trgt_fpga_lvds_status_led_en_l : out std_logic;
+        a2_power_status_l : out std_logic;
+        ign_trgt_fpga_pushbutton_reset_l : in std_logic;
+        lvds_rsw0_to_ign_trgt_fpga_p : inout std_logic;
+        lvds_ign_trgt_fpga_to_rsw0_p : inout std_logic;
+        lvds_ign_trgt_fpga_to_rsw0_n : inout std_logic;
+        lvds_rsw1_to_ign_trgt_fpga_p : inout std_logic;
+        lvds_ign_trgt_fpga_to_rsw1_p : inout std_logic;
+        lvds_ign_trgt_fpga_to_rsw1_n : inout std_logic;
+        a2_en : out std_logic;
+        v3p3_sys_a2_pg : in std_logic;
+        v1p0_mgmt_a2_pg : in std_logic;
+        v2p5_mgmt_a2_pg : in std_logic;
+        sp_fault_l : in std_logic;
+        rot_fault_l : in std_logic
+
+    );
+end entity;
+
+architecture rtl of observer_ignition_top is
+    signal sw0_serial_in : std_logic;
+    signal sw0_serial_out : std_logic;
+    signal sw1_serial_in : std_logic;
+    signal sw1_serial_out : std_logic;
+    signal a2_pg : std_logic;
+    signal led_counter : unsigned(24 downto 0) := (others => '0');
+    signal reset_sync1 : std_logic;
+    signal reset_syncd : std_logic;
+
+begin
+    rst_sync: process(clk_50mhz_ign_trgt_fpga, ign_trgt_fpga_design_reset_l)
+    begin
+        if ign_trgt_fpga_design_reset_l = '0' then
+            reset_sync1 <= '1';
+            reset_syncd <= '1';
+        elsif rising_edge(clk_50mhz_ign_trgt_fpga) then
+            -- flipping to active high here and providing a 2 clock sync
+            reset_sync1 <= '0';
+            reset_syncd <= reset_sync1;
+        end if;
+    end process;
+
+     -- Blink an LED at some rate
+    led: process(clk_50mhz_ign_trgt_fpga, reset_syncd)
+    begin
+        if reset_syncd = '1' then
+            led_counter <= (others => '0');
+        elsif rising_edge(clk_50mhz_ign_trgt_fpga) then
+            led_counter <= led_counter + 1;
+        end if;
+    end process;
+    ign_trgt_fpga_lvds_status_led_en_l <= led_counter(23);
+
+
+    pg:process(clk_50mhz_ign_trgt_fpga, reset_syncd)
+    begin
+        if reset_syncd = '1' then
+            a2_pg <= '0';
+        elsif rising_edge(clk_50mhz_ign_trgt_fpga) then
+            a2_pg <= v3p3_sys_a2_pg and v1p0_mgmt_a2_pg and v2p5_mgmt_a2_pg;
+        end if;
+    end process;
+
+    a2_power_status_l <= not a2_pg; -- Active low power good LED
+
+    ignition_target_common_inst: entity work.ignition_target_common
+     generic map(
+        NUM_LEDS => 4,
+        NUM_BITS_IGNITION_ID => 8
+    )
+     port map(
+        clk => clk_50mhz_ign_trgt_fpga,
+        reset => reset_syncd,
+        sw0_serial_in => sw0_serial_in,
+        sw0_serial_out => sw0_serial_out,
+        sw1_serial_in => sw1_serial_in,
+        sw1_serial_out => sw1_serial_out,
+        ignit_to_ibc_pwren => a2_en,
+        hotswap_restart_l => open,
+        ignit_led_l => ign_trgt_fpga_debug_led,
+        a3_pwr_fault_l => '1',
+        a2_pg => a2_pg,
+        sp_fault_l => sp_fault_l,
+        rot_fault_l => rot_fault_l,
+        push_btn_l => '1',
+        ignition_id => ign_trgt_id,
+        dbg => ign_trgt_fpga_spare_v3p3(4 downto 2)
+    );
+
+    ignition_io_inst: entity work.ignition_io
+     port map(
+        clk => clk_50mhz_ign_trgt_fpga,
+        sw0_serial_in => sw0_serial_in,
+        sw0_serial_out => sw0_serial_out,
+        sw1_serial_in => sw1_serial_in,
+        sw1_serial_out => sw1_serial_out,
+        rsw0_serial_in_p => lvds_rsw0_to_ign_trgt_fpga_p,
+        rsw0_serial_out_p => lvds_ign_trgt_fpga_to_rsw0_p,
+        rsw0_serial_out_n => lvds_ign_trgt_fpga_to_rsw0_n,
+        rsw1_serial_in_p => lvds_rsw1_to_ign_trgt_fpga_p,
+        rsw1_serial_out_p => lvds_ign_trgt_fpga_to_rsw1_p,
+        rsw1_serial_out_n => lvds_ign_trgt_fpga_to_rsw1_n
+    );
+
+    ign_trgt_fpga_spare_v3p3(0) <= not sw0_serial_in;
+    ign_trgt_fpga_spare_v3p3(1) <= sw0_serial_out;
+end rtl;

tools/fpga_releaser/config.toml

@@ -25,4 +25,9 @@ toolchain = "vivado"
 job_name = "gfruit-image"
 hubris_path = "drv/spartan7-loader/grapefruit"
 builder = "buck2"
-toolchain = "vivado"
+toolchain = "vivado"
+
+[observer-ignition]
+job_name = "observer-ignition-image"
+builder = "buck2"
+toolchain = "yosys"