Seeing if i can get this to work

CMakeLists.txt

@@ -1,42 +1,29 @@
 cmake_minimum_required(VERSION 3.13)
 
 set(CMAKE_C_STANDARD 11)
-set(CMAKE_CXX_STANDARD 17)
-
-# initalize pico_sdk from installed location
-# (note this can come from environment, CMake cache etc)
-set(PICO_SDK_PATH "/home/ben/pico/pico-sdk")
 
 # Pull in Raspberry Pi Pico SDK (must be before project)
+set(PICO_SDK_FETCH_FROM_GIT on)
 include(pico_sdk_import.cmake)
 
+include_directories(${CMAKE_SOURCE_DIR})
+
 project(pico_vga C CXX ASM)
-
-add_executable(pico_vga)
-
-# Initialise the Raspberry Pi Pico SDK
 pico_sdk_init()
 
 
-pico_set_program_name(pico_vga "pico_vga")
+# pico_generate_pio_header(pico_vga ${CMAKE_CURRENT_LIST_DIR}/video.pio)
-pico_set_program_version(pico_vga "0.1")
 
-pico_enable_stdio_usb(pico_vga 1)
+add_executable(pico_vga
-pico_enable_stdio_uart(pico_vga 0)
+    src/main.c
-
-pico_generate_pio_header(pico_vga ${CMAKE_CURRENT_LIST_DIR}/video.pio)
-
-target_sources(pico_vga PRIVATE 
-    main.c
-    vga.c
     )
 
 # Add the standard library to the build
-target_link_libraries(pico_vga 
+target_link_libraries(pico_vga
-    pico_stdlib 
+    pico_stdlib
-    hardware_pio
+    # hardware_pio
-    hardware_dma
+    # hardware_dma
-    hardware_irq
+    # hardware_irq
     )
 
 pico_add_extra_outputs(pico_vga)

main.c

@@ -1,40 +0,0 @@
-// Copyright Benjamin Kyd 2021 All Rights Reserved
-
-#include <stdio.h>
-
-#include "pico/stdlib.h"
-#include "hardware/clocks.h"
-#include "hardware/pio.h"
-#include "hardware/dma.h"
-#include "hardware/irq.h"
-
-#include "pico/stdlib.h"
-
-#include "vga.h"
-
-// PIN LAYOUT
-// PIN 0-3 RED DAC
-// PIN 4-7 GREEN DAC
-// PIN 8-11 BLUE DAC
-// PIN 12 HSYNC
-// PIN 13 VSYNC
-
-int main()
-{
-    stdio_init_all();
-    sleep_ms(1400);
-
-    gpio_init(PICO_DEFAULT_LED_PIN);
-    gpio_set_dir(PICO_DEFAULT_LED_PIN, GPIO_OUT);
-    gpio_put(PICO_DEFAULT_LED_PIN, 1);
-
-    printf("VGA Initalizing...\n");
-
-    const video_timing_t video_timing = vga_timing_800x600_60;
-    vga_init(&video_timing);
-
-    while(true) 
-    {
-        tight_loop_contents();
-    }
-}

makefile

@@ -0,0 +1,16 @@
+.ONESHELL:
+
+all: compile flash
+
+compile:
+	cd build && cmake .. -DCMAKE_EXPORT_COMPILE_COMMANDS=on && make
+
+flash: compile
+	sudo mount -L RPI-RP2 /mnt
+	sudo cp build/pico_vga.uf2 /mnt
+	echo "Copied pico_vga.uf2 to pico"
+
+clean:
+	rm -rf build
+	mkdir build
+

pico_sdk_import.cmake

@@ -29,11 +29,22 @@ if (NOT PICO_SDK_PATH)
         if (PICO_SDK_FETCH_FROM_GIT_PATH)
             get_filename_component(FETCHCONTENT_BASE_DIR "${PICO_SDK_FETCH_FROM_GIT_PATH}" REALPATH BASE_DIR "${CMAKE_SOURCE_DIR}")
         endif ()
-        FetchContent_Declare(
+        # GIT_SUBMODULES_RECURSE was added in 3.17
-                pico_sdk
+        if (${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.17.0")
-                GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
+            FetchContent_Declare(
-                GIT_TAG master
+                    pico_sdk
-        )
+                    GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
+                    GIT_TAG master
+                    GIT_SUBMODULES_RECURSE FALSE
+            )
+        else ()
+            FetchContent_Declare(
+                    pico_sdk
+                    GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
+                    GIT_TAG master
+            )
+        endif ()
+
         if (NOT pico_sdk)
             message("Downloading Raspberry Pi Pico SDK")
             FetchContent_Populate(pico_sdk)

src/main.c

@@ -0,0 +1,17 @@
+// Copyright Benjamin Kyd 2021 All Rights Reserved
+
+// PIN LAYOUT
+// PIN 0-3 RED DAC
+// PIN 4-7 GREEN DAC
+// PIN 8-11 BLUE DAC
+// PIN 12 HSYNC
+// PIN 13 VSYNC
+
+#include <stdio.h>
+#include "pico/stdlib.h"
+
+int main() {
+    setup_default_uart();
+    printf("Hello, world!\n");
+    return 0;
+}

src/vga.c

@@ -11,28 +11,28 @@
 #include "vga.h"
 #include "video.pio.h"
 
-const video_timing_t vga_timing_800x600_60 =
+// const video_timing_t vga_timing_800x600_60 =
-{
+// {
-        .clock_freq = 38400000,
+//         .clock_freq = 38400000,
-
+//
-        .h_active = 800,
+//         .h_active = 800,
-        .v_active = 600,
+//         .v_active = 600,
-
+//
-        .h_front_porch = 4 * 8,
+//         .h_front_porch = 4 * 8,
-        .h_pulse = 10 * 8,
+//         .h_pulse = 10 * 8,
-        .h_total = 128 * 8,
+//         .h_total = 128 * 8,
-        .h_sync_polarity = 0,
+//         .h_sync_polarity = 0,
-
+//
-        .v_front_porch = 1,
+//         .v_front_porch = 1,
-        .v_pulse = 3,
+//         .v_pulse = 3,
-        .v_total = 625,
+//         .v_total = 625,
-        .v_sync_polarity = 0,
+//         .v_sync_polarity = 0,
-
+//
-        .enable_clock = 0,
+//         .enable_clock = 0,
-        .clock_polarity = 0,
+//         .clock_polarity = 0,
-
+//
-        .enable_den = 0
+//         .enable_den = 0
-};
+// };
 
 #define PIN_START 8
 #define PIN_COUNT 2

src/vga.h

@@ -0,0 +1,40 @@
+#ifndef PICOVGA_VGA_H_
+#define PICOVGA_VGA_H_
+
+#include "pico/types.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;
+//
+// // typedef struct video {
+// //     uint16_t* 
+// // } video_t;
+//
+// void vga_init(const video_timing_t* timing);
+//
+// void vga_start();
+//
+// void vga_swap_buffers();
+//
+#endif

vga.h

@@ -1,40 +0,0 @@
-#ifndef PICOVGA_VGA_H_
-#define PICOVGA_VGA_H_
-
-#include "pico/types.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;
-
-// typedef struct video {
-//     uint16_t* 
-// } video_t;
-
-void vga_init(const video_timing_t* timing);
-
-void vga_start();
-
-void vga_swap_buffers();
-
-#endif

vga.txt

@@ -1,5 +0,0 @@
-WHITE - VSYNC - 
-BLACK - HSYNC - 
-RED   - VGA_R - 
-GREEN - VGA_G - 
-BLUE  - VGA_B - 

video.pio

@@ -1,28 +0,0 @@
-; Copyright Benjamin Kyd 2021 All Rights Reserved
-
-.program video
-
-; write 5 bits from the TX FIFO to the pin mask 
-
-.wrap_target
-    out pins 2
-.wrap
-
-% c-sdk {
-static inline void video_program_init(PIO pio, uint sm, uint offset, uint pin, float clk_div) {
-    pio_sm_config c = video_program_get_default_config(offset);
-
-    // Map the state machine's OUT pin group to one pin, namely the `pin`
-    // parameter to this function.
-    sm_config_set_out_pins(&c, pin, 1);
-    // Set this pin's GPIO function (connect PIO to the pad)
-    pio_gpio_init(pio, pin);
-    // Set the pin direction to output at the PIO
-    pio_sm_set_consecutive_pindirs(pio, sm, pin, 1, true);
-
-    // Load our configuration, and jump to the start of the program
-    pio_sm_init(pio, sm, offset, &c);
-    // Set the state machine running
-    pio_sm_set_enabled(pio, sm, true);
-}
-%}