lol

CMakeLists.txt

@@ -2,18 +2,22 @@ cmake_minimum_required(VERSION 3.13)
 
 set(CMAKE_C_STANDARD 11)
 
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
 # Pull in Raspberry Pi Pico SDK (must be before project)
 set(PICO_SDK_FETCH_FROM_GIT on)
 include(pico_sdk_import.cmake)
 
+project(pico_vga C CXX ASM)
+
 include_directories(${CMAKE_SOURCE_DIR})
 
-project(pico_vga C CXX ASM)
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Werror")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O2")
+
 pico_sdk_init()
 
-
-# pico_generate_pio_header(pico_vga ${CMAKE_CURRENT_LIST_DIR}/video.pio)
-
 add_executable(pico_vga
     src/main.c
     )
@@ -21,9 +25,11 @@ add_executable(pico_vga
 # Add the standard library to the build
 target_link_libraries(pico_vga
     pico_stdlib
-    # hardware_pio
+    hardware_pio
-    # hardware_dma
+    hardware_dma
-    # hardware_irq
+    hardware_irq
     )
 
+pico_generate_pio_header(pico_vga ${CMAKE_CURRENT_LIST_DIR}/src/vga.pio)
+
 pico_add_extra_outputs(pico_vga)

designs/picovga/picovga.kicad_prl

@@ -2,10 +2,13 @@
   "board": {
     "active_layer": 0,
     "active_layer_preset": "",
+    "auto_track_width": true,
+    "hidden_netclasses": [],
     "hidden_nets": [],
     "high_contrast_mode": 0,
     "net_color_mode": 1,
     "opacity": {
+      "images": 0.6,
       "pads": 0.8500000238418579,
       "tracks": 1.0,
       "vias": 1.0,
@@ -48,15 +51,13 @@
       20,
       21,
       22,
-      23,
       24,
+      25,
+      26,
       27,
       28,
-      29,
+      34,
-      30,
+      35,
-      31,
-      32,
-      33,
       37,
       38
     ],
@@ -65,7 +66,7 @@
   },
   "meta": {
     "filename": "picovga.kicad_prl",
-    "version": 2
+    "version": 3
   },
   "project": {
     "files": []

designs/picovga/picovga.kicad_pro

@@ -1,5 +1,6 @@
 {
   "board": {
+    "3dviewports": [],
     "design_settings": {
       "defaults": {
         "board_outline_line_width": 0.09999999999999999,
@@ -51,25 +52,34 @@
       "diff_pair_dimensions": [],
       "drc_exclusions": [],
       "meta": {
-        "version": 1
+        "version": 2
       },
       "rule_severities": {
         "annular_width": "error",
         "clearance": "error",
+        "connection_width": "warning",
         "copper_edge_clearance": "error",
+        "copper_sliver": "warning",
         "courtyards_overlap": "error",
         "diff_pair_gap_out_of_range": "error",
         "diff_pair_uncoupled_length_too_long": "error",
+        "drill_out_of_range": "error",
         "drill_too_small": "error",
         "duplicate_footprints": "warning",
         "extra_footprint": "warning",
+        "footprint": "error",
+        "footprint_type_mismatch": "ignore",
         "hole_clearance": "error",
         "hole_near_hole": "error",
         "invalid_outline": "error",
+        "isolated_copper": "warning",
         "item_on_disabled_layer": "error",
         "items_not_allowed": "error",
         "length_out_of_range": "error",
+        "lib_footprint_issues": "warning",
+        "lib_footprint_mismatch": "warning",
         "malformed_courtyard": "error",
+        "microvia_drill_out_of_range": "error",
         "microvia_drill_too_small": "error",
         "missing_courtyard": "ignore",
         "missing_footprint": "warning",
@@ -78,9 +88,15 @@
         "padstack": "error",
         "pth_inside_courtyard": "ignore",
         "shorting_items": "error",
+        "silk_edge_clearance": "warning",
         "silk_over_copper": "error",
         "silk_overlap": "error",
         "skew_out_of_range": "error",
+        "solder_mask_bridge": "error",
+        "starved_thermal": "error",
+        "text_height": "warning",
+        "text_thickness": "warning",
+        "through_hole_pad_without_hole": "error",
         "too_many_vias": "error",
         "track_dangling": "warning",
         "track_width": "error",
@@ -96,27 +112,77 @@
         "allow_microvias": false,
         "max_error": 0.005,
         "min_clearance": 0.0,
+        "min_connection": 0.0,
         "min_copper_edge_clearance": 0.0,
         "min_hole_clearance": 0.0,
         "min_hole_to_hole": 0.25,
         "min_microvia_diameter": 0.19999999999999998,
         "min_microvia_drill": 0.09999999999999999,
+        "min_resolved_spokes": 2,
         "min_silk_clearance": 0.0,
+        "min_text_height": 0.7999999999999999,
+        "min_text_thickness": 0.08,
         "min_through_hole_diameter": 0.3,
         "min_track_width": 0.19999999999999998,
         "min_via_annular_width": 0.049999999999999996,
         "min_via_diameter": 0.39999999999999997,
         "solder_mask_clearance": 0.0,
         "solder_mask_min_width": 0.0,
+        "solder_mask_to_copper_clearance": 0.0,
         "solder_paste_clearance": 0.0,
-        "solder_paste_margin_ratio": 0.0
+        "solder_paste_margin_ratio": 0.0,
+        "use_height_for_length_calcs": true
       },
+      "teardrop_options": [
+        {
+          "td_onpadsmd": true,
+          "td_onroundshapesonly": false,
+          "td_ontrackend": false,
+          "td_onviapad": true
+        }
+      ],
+      "teardrop_parameters": [
+        {
+          "td_allow_use_two_tracks": true,
+          "td_curve_segcount": 0,
+          "td_height_ratio": 1.0,
+          "td_length_ratio": 0.5,
+          "td_maxheight": 2.0,
+          "td_maxlen": 1.0,
+          "td_on_pad_in_zone": false,
+          "td_target_name": "td_round_shape",
+          "td_width_to_size_filter_ratio": 0.9
+        },
+        {
+          "td_allow_use_two_tracks": true,
+          "td_curve_segcount": 0,
+          "td_height_ratio": 1.0,
+          "td_length_ratio": 0.5,
+          "td_maxheight": 2.0,
+          "td_maxlen": 1.0,
+          "td_on_pad_in_zone": false,
+          "td_target_name": "td_rect_shape",
+          "td_width_to_size_filter_ratio": 0.9
+        },
+        {
+          "td_allow_use_two_tracks": true,
+          "td_curve_segcount": 0,
+          "td_height_ratio": 1.0,
+          "td_length_ratio": 0.5,
+          "td_maxheight": 2.0,
+          "td_maxlen": 1.0,
+          "td_on_pad_in_zone": false,
+          "td_target_name": "td_track_end",
+          "td_width_to_size_filter_ratio": 0.9
+        }
+      ],
       "track_widths": [],
       "via_dimensions": [],
       "zones_allow_external_fillets": false,
       "zones_use_no_outline": true
     },
-    "layer_presets": []
+    "layer_presets": [],
+    "viewports": []
   },
   "boards": [],
   "cvpcb": {
@@ -134,6 +200,7 @@
         0,
         0,
         0,
+        0,
         1,
         0,
         0,
@@ -147,6 +214,7 @@
         0,
         1,
         0,
+        0,
         1,
         0,
         2,
@@ -160,6 +228,7 @@
         0,
         0,
         0,
+        0,
         1,
         0,
         1,
@@ -173,6 +242,7 @@
         0,
         0,
         0,
+        0,
         1,
         1,
         2,
@@ -186,6 +256,7 @@
         0,
         0,
         0,
+        0,
         1,
         0,
         0,
@@ -193,12 +264,27 @@
         0,
         2
       ],
+      [
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        2
+      ],
       [
         1,
         1,
         1,
         1,
         1,
+        0,
         1,
         1,
         1,
@@ -212,6 +298,7 @@
         0,
         1,
         0,
+        0,
         1,
         0,
         0,
@@ -225,6 +312,7 @@
         1,
         2,
         0,
+        0,
         1,
         0,
         2,
@@ -238,6 +326,7 @@
         0,
         1,
         0,
+        0,
         1,
         0,
         2,
@@ -251,6 +340,7 @@
         1,
         1,
         0,
+        0,
         1,
         0,
         2,
@@ -269,21 +359,31 @@
         2,
         2,
         2,
+        2,
         2
       ]
     ],
     "rule_severities": {
       "bus_definition_conflict": "error",
+      "bus_entry_needed": "error",
       "bus_label_syntax": "error",
       "bus_to_bus_conflict": "error",
       "bus_to_net_conflict": "error",
+      "conflicting_netclasses": "error",
       "different_unit_footprint": "error",
       "different_unit_net": "error",
+      "duplicate_reference": "error",
       "duplicate_sheet_names": "error",
+      "endpoint_off_grid": "warning",
+      "extra_units": "error",
       "global_label_dangling": "warning",
       "hier_label_mismatch": "error",
       "label_dangling": "error",
       "lib_symbol_issues": "warning",
+      "missing_bidi_pin": "warning",
+      "missing_input_pin": "warning",
+      "missing_power_pin": "error",
+      "missing_unit": "warning",
       "multiple_net_names": "warning",
       "net_not_bus_member": "warning",
       "no_connect_connected": "warning",
@@ -293,6 +393,9 @@
       "pin_to_pin": "warning",
       "power_pin_not_driven": "error",
       "similar_labels": "warning",
+      "simulation_model_issue": "ignore",
+      "unannotated": "error",
+      "unit_value_mismatch": "error",
       "unresolved_variable": "error",
       "wire_dangling": "error"
     }
@@ -308,7 +411,7 @@
   "net_settings": {
     "classes": [
       {
-        "bus_width": 6.0,
+        "bus_width": 6,
         "clearance": 0.2,
         "diff_pair_gap": 0.25,
         "diff_pair_via_gap": 0.25,
@@ -322,13 +425,15 @@
         "track_width": 0.25,
         "via_diameter": 0.8,
         "via_drill": 0.4,
-        "wire_width": 6.0
+        "wire_width": 6
       }
     ],
     "meta": {
-      "version": 0
+      "version": 3
     },
-    "net_colors": null
+    "net_colors": null,
+    "netclass_assignments": null,
+    "netclass_patterns": []
   },
   "pcbnew": {
     "last_paths": {
@@ -342,31 +447,96 @@
     "page_layout_descr_file": ""
   },
   "schematic": {
+    "annotate_start_num": 0,
+    "bom_fmt_presets": [],
+    "bom_fmt_settings": {
+      "field_delimiter": ",",
+      "keep_line_breaks": false,
+      "keep_tabs": false,
+      "name": "CSV",
+      "ref_delimiter": ",",
+      "ref_range_delimiter": "",
+      "string_delimiter": "\""
+    },
+    "bom_presets": [],
+    "bom_settings": {
+      "exclude_dnp": false,
+      "fields_ordered": [
+        {
+          "group_by": false,
+          "label": "Reference",
+          "name": "Reference",
+          "show": true
+        },
+        {
+          "group_by": true,
+          "label": "Value",
+          "name": "Value",
+          "show": true
+        },
+        {
+          "group_by": false,
+          "label": "Datasheet",
+          "name": "Datasheet",
+          "show": true
+        },
+        {
+          "group_by": false,
+          "label": "Footprint",
+          "name": "Footprint",
+          "show": true
+        },
+        {
+          "group_by": false,
+          "label": "Qty",
+          "name": "Quantity",
+          "show": true
+        }
+      ],
+      "filter_string": "",
+      "group_symbols": true,
+      "name": "Grouped By Value",
+      "sort_asc": true,
+      "sort_field": "Reference"
+    },
     "drawing": {
+      "dashed_lines_dash_length_ratio": 12.0,
+      "dashed_lines_gap_length_ratio": 3.0,
       "default_bus_thickness": 12.0,
       "default_junction_size": 36.0,
       "default_line_thickness": 6.0,
       "default_text_size": 50.0,
       "default_wire_thickness": 6.0,
       "field_names": [],
+      "intersheets_ref_own_page": false,
       "intersheets_ref_prefix": "",
       "intersheets_ref_short": false,
       "intersheets_ref_show": false,
       "intersheets_ref_suffix": "",
       "junction_size_choice": 3,
+      "label_size_ratio": 0.3,
+      "operating_point_overlay_i_precision": 3,
+      "operating_point_overlay_i_range": "~A",
+      "operating_point_overlay_v_precision": 3,
+      "operating_point_overlay_v_range": "~V",
       "pin_symbol_size": 25.0,
       "text_offset_ratio": 0.3
     },
     "legacy_lib_dir": "",
     "legacy_lib_list": [],
     "meta": {
-      "version": 0
+      "version": 1
     },
     "net_format_name": "",
     "page_layout_descr_file": "",
     "plot_directory": "",
     "spice_adjust_passive_values": false,
+    "spice_current_sheet_as_root": false,
     "spice_external_command": "spice \"%I\"",
+    "spice_model_current_sheet_as_root": true,
+    "spice_save_all_currents": false,
+    "spice_save_all_dissipations": false,
+    "spice_save_all_voltages": false,
     "subpart_first_id": 65,
     "subpart_id_separator": 0
   },

makefile

@@ -1,12 +1,14 @@
 .ONESHELL:
 
-all: compile flash
+all: compile mount flash
 
 compile:
 	cd build && cmake .. -DCMAKE_EXPORT_COMPILE_COMMANDS=on && make
 
-flash: compile
+mount: compile
 	sudo mount -L RPI-RP2 /mnt
+
+flash: mount
 	sudo cp build/pico_vga.uf2 /mnt
 	echo "Copied pico_vga.uf2 to pico"
 

src/main.c

@@ -9,9 +9,86 @@
 
 #include <stdio.h>
 #include "pico/stdlib.h"
+#include "hardware/clocks.h"
+#include "hardware/pio.h"
+#include "hardware/dma.h"
+#include "hardware/irq.h"
+
+#include "vga.pio.h"
+
+typedef struct video_timing {
+    uint32_t clock_freq;
+
+    uint16_t h_active;
+    uint16_t v_active;
+
+    uint16_t h_front_porch;
+    uint16_t h_pulse;
+    uint16_t h_total;
+    uint8_t h_sync_polarity;
+
+    uint16_t v_front_porch;
+    uint16_t v_pulse;
+    uint16_t v_total;
+    uint8_t v_sync_polarity;
+
+    uint8_t enable_clock;
+    uint8_t clock_polarity;
+
+    uint8_t enable_den;
+} video_timing_t;
+
+const video_timing_t vga_timing_800x600_60 =
+{
+    .clock_freq = 38400000,
+
+    .h_active = 800,
+    .v_active = 600,
+
+    .h_front_porch = 4 * 8,
+    .h_pulse = 10 * 8,
+    .h_total = 128 * 8,
+    .h_sync_polarity = 0,
+
+    .v_front_porch = 1,
+    .v_pulse = 3,
+    .v_total = 625,
+    .v_sync_polarity = 0,
+
+    .enable_clock = 0,
+    .clock_polarity = 0,
+
+    .enable_den = 0
+};
+
+static inline void vga_program_init(PIO pio, uint sm, uint offset, uint pin) {
+
+    pio_gpio_init(pio, pin);
+    pio_gpio_init(pio, pin+1);
+    pio_sm_set_consecutive_pindirs(pio, sm, pin, 2, true);
+
+    pio_sm_config c = vga_program_get_default_config(offset);
+
+    sm_config_set_out_pins(&c, pin, 2);
+
+    sm_config_set_fifo_join(&c, PIO_FIFO_JOIN_TX);
+    sm_config_set_out_shift(&c, false, true, 2);
+
+    pio_sm_init(pio, sm, offset, &c);
+    pio_sm_set_enabled(pio, sm, true);
+}
 
 int main() {
-    setup_default_uart();
+    PIO pio = pio0;
-    printf("Hello, world!\n");
+    uint offset = pio_add_program(pio, &vga_program);
-    return 0;
+    uint sm = pio_claim_unused_sm(pio, true);
+
+    vga_program_init(pio, sm, offset, 12);
+
+    while (true) {
+        pio_sm_put_blocking(pio, sm, 0b01);
+        sleep_ms(20);
+        pio_sm_put_blocking(pio, sm, 0b10);
+        sleep_ms(20);
+    }
 }

src/vga.pio

@@ -0,0 +1,4 @@
+.program vga
+loop:
+    out pins, 2
+    jmp loop