Add STM32F303Nucleo. Disable broken examples.

examples/stmicro/stm32/build.zig

@@ -14,6 +14,7 @@ pub fn build(b: *std.Build) void {
     const stm32 = mb.ports.stm32;
 
     const available_examples = [_]Example{
+        .{ .target = stm32.boards.stm32f303nucleo, .name = "stm32f303nucleo_Blinky", .file = "src/blinky.zig" },
         .{ .target = stm32.boards.stm32f3discovery, .name = "stm32f3discovery", .file = "src/blinky.zig" },
         // TODO: stm32.pins.GlobalConfiguration is not available on those targets
         // .{ .target = stm32.chips.stm32f407vg, .name = "stm32f407vg", .file = "src/blinky.zig" },
@@ -25,7 +26,6 @@ pub fn build(b: *std.Build) void {
         .{ .target = stm32.boards.stm32l476discovery, .name = "STM32L476Discovery_Lcd", .file = "src/stm32l476/lcd.zig" },
         .{ .target = stm32.boards.stm32l476discovery, .name = "STM32L476Discovery_Blinky", .file = "src/blinky.zig" },
         .{ .target = stm32.boards.stm32l476discovery, .name = "STM32L476Discovery_HTS221", .file = "src/hts221.zig" },
-
         .{ .target = stm32.chips.STM32F103C8, .name = "STM32F1xx_blink", .file = "src/blinky.zig" },
         .{ .target = stm32.chips.STM32F100RB, .name = "STM32F1xx_semihost", .file = "src/semihosting.zig" }, //QEMU target: stm32vldiscovery
         .{ .target = stm32.chips.STM32F103C8, .name = "STM32F1xx_adc", .file = "src/stm32f1xx/adc.zig" },

examples/stmicro/stm32/src/blinky.zig

@@ -21,6 +21,12 @@ pub fn main() !void {
                 pins.led,
             };
             break :res .{ pins, all_leds };
+        } else if (comptime microzig.config.board_name != null and std.mem.eql(u8, microzig.config.board_name.?, "STM32F303NUCLEO")) {
+            const pins = board.leds_config.apply();
+            const all_leds = .{
+                pins.LD2,
+            };
+            break :res .{ pins, all_leds };
         } else if (comptime microzig.config.board_name != null and std.mem.eql(u8, microzig.config.board_name.?, "STM32F3DISCOVERY")) {
             const pins = board.leds_config.apply();
             const all_leds = .{
@@ -33,16 +39,13 @@ pub fn main() !void {
                 pins.LD9,
                 pins.LD10,
             };
-
             break :res .{ pins, all_leds };
         } else if (comptime microzig.config.board_name != null and std.mem.eql(u8, microzig.config.board_name.?, "STM32L476DISCOVERY")) {
             const pins = board.leds_config.apply();
-
             const all_leds = .{
                 pins.LD4,
                 pins.LD5,
             };
-
             break :res .{ pins, all_leds };
         } else {
             @compileError("blinky is not (yet?) implemented for this target");

port/stmicro/stm32/build.zig

@@ -11,6 +11,7 @@ boards: struct {
     stm32f4discovery: *const microzig.Target,
     stm3240geval: *const microzig.Target,
     stm32f429idiscovery: *const microzig.Target,
+    stm32f303nucleo: *const microzig.Target,
 },
 
 pub fn init(dep: *std.Build.Dependency) Self {
@@ -30,6 +31,16 @@ pub fn init(dep: *std.Build.Dependency) Self {
     return .{
         .chips = chips,
         .boards = .{
+            .stm32f303nucleo = chips.STM32F303RE.derive(.{
+                .board = .{
+                    .name = "STM32F303NUCLEO",
+                    .root_source_file = b.path("src/boards/STM32F303NUCLEO.zig"),
+                },
+                .hal = microzig.HardwareAbstractionLayer{
+                    .root_source_file = b.path("src/hals/STM32F303.zig"),
+                },
+                .stack = .{ .ram_region_name = "CCMRAM" },
+            }),
             .stm32l476discovery = chips.STM32L476VG.derive(.{
                 .board = .{
                     .name = "STM32L476DISCOVERY",

port/stmicro/stm32/src/boards/STM32F303NUCLEO.zig

@@ -0,0 +1,11 @@
+const std = @import("std");
+
+pub const microzig = @import("microzig");
+
+pub const hal = microzig.hal;
+
+pub const leds_config = (hal.pins.GlobalConfiguration{
+    .GPIOA = .{
+        .PIN5 = .{ .name = "LD2", .mode = .{ .output = .{ .resistor = .Floating, .o_type = .PushPull } } },
+    },
+});