1  const std = @import("std");
 2  const microzig = @import("microzig");
 3  const hal = microzig.hal;
 4  const board = microzig.board;
 5  
 6  fn delay() void {
 7      var i: u32 = 0;
 8      while (i < 800_000) {
 9          asm volatile ("nop");
10          i += 1;
11      }
12  }
13  
14  pub fn main() !void {
15      const pins, const all_leds = res: {
16          if (comptime std.mem.eql(u8, microzig.config.chip_name, "STM32F103C8")) {
17              const pins = (hal.pins.GlobalConfiguration{ .GPIOC = .{
18                  .PIN13 = .{ .name = "led", .mode = .{ .output = .general_purpose_push_pull } },
19              } }).apply();
20              const all_leds = .{
21                  pins.led,
22              };
23              break :res .{ pins, all_leds };
24          } else if (comptime microzig.config.board_name != null and std.mem.eql(u8, microzig.config.board_name.?, "STM32F303NUCLEO")) {
25              const pins = board.leds_config.apply();
26              const all_leds = .{
27                  pins.LD2,
28              };
29              break :res .{ pins, all_leds };
30          } else if (comptime microzig.config.board_name != null and std.mem.eql(u8, microzig.config.board_name.?, "STM32F3DISCOVERY")) {
31              const pins = board.leds_config.apply();
32              const all_leds = .{
33                  pins.LD3,
34                  pins.LD4,
35                  pins.LD5,
36                  pins.LD6,
37                  pins.LD7,
38                  pins.LD8,
39                  pins.LD9,
40                  pins.LD10,
41              };
42              break :res .{ pins, all_leds };
43          } else if (comptime microzig.config.board_name != null and std.mem.eql(u8, microzig.config.board_name.?, "STM32L476DISCOVERY")) {
44              const pins = board.leds_config.apply();
45              const all_leds = .{
46                  pins.LD4,
47                  pins.LD5,
48              };
49              break :res .{ pins, all_leds };
50          } else {
51              @compileError("blinky is not (yet?) implemented for this target");
52          }
53      };
54      _ = pins;
55  
56      while (true) {
57          delay();
58          for (0..all_leds.len) |k| {
59              switch (@as(u3, @intCast(k))) {
60                  inline else => |i| {
61                      if (i >= all_leds.len) unreachable;
62                      all_leds[i].toggle();
63                  },
64              }
65          }
66      }
67  }