ch32h417: Add systick

build.zig

@@ -31,6 +31,7 @@ const port_list: []const struct {
     .{ .name = "rp2xxx", .dep_name = "port/raspberrypi/rp2xxx" },
     .{ .name = "stm32", .dep_name = "port/stmicro/stm32" },
     .{ .name = "ch32v", .dep_name = "port/wch/ch32v" },
+    .{ .name = "ch32h", .dep_name = "port/wch/ch32h" },
     .{ .name = "msp430", .dep_name = "port/texasinstruments/msp430" },
     .{ .name = "mspm0", .dep_name = "port/texasinstruments/mspm0" },
     .{ .name = "tm4c", .dep_name = "port/texasinstruments/tm4c" },
@@ -70,6 +71,7 @@ pub const PortSelect = struct {
     rp2xxx: bool = false,
     stm32: bool = false,
     ch32v: bool = false,
+    ch32h: bool = false,
     msp430: bool = false,
     mspm0: bool = false,
     tm4c: bool = false,

build.zig.zon

@@ -30,6 +30,7 @@
         .@"port/texasinstruments/mspm0" = .{ .path = "port/texasinstruments/mspm0", .lazy = true },
         .@"port/texasinstruments/tm4c" = .{ .path = "port/texasinstruments/tm4c", .lazy = true },
         .@"port/wch/ch32v" = .{ .path = "port/wch/ch32v", .lazy = true },
+        .@"port/wch/ch32h" = .{ .path = "port/wch/ch32h", .lazy = true },
 
         .@"modules/riscv32-common" = .{ .path = "modules/riscv32-common" },
         .@"modules/rtt" = .{ .path = "modules/rtt" },

examples/wch/ch32h/build.zig

@@ -0,0 +1,44 @@
+const std = @import("std");
+const microzig = @import("microzig");
+
+const MicroBuild = microzig.MicroBuild(.{
+    .ch32h = true,
+});
+
+fn add_example(b: *std.Build, mb: anytype, comptime name: []const u8, optimize: std.builtin.OptimizeMode) void {
+    const v3f = mb.add_firmware(.{
+        .name = "v3f",
+        .root_source_file = b.path("src/" ++ name ++ "_v3f.zig"),
+        .optimize = optimize,
+        .target = mb.ports.ch32h.chips.ch32h417_v3f,
+    });
+
+    const v5f = mb.add_firmware(.{
+        .name = "v5f",
+        .root_source_file = b.path("src/" ++ name ++ "_v5f.zig"),
+        .optimize = optimize,
+        .target = mb.ports.ch32h.chips.ch32h417_v5f,
+    });
+
+    const merged_bin = mb.ports.ch32h.merge(b, v3f.get_emitted_elf(), v5f.get_emitted_elf(), name ++ "_merged.bin");
+
+    const install = b.addInstallFileWithDir(merged_bin, .{ .custom = "firmware" }, name ++ ".bin");
+    b.getInstallStep().dependOn(&install.step);
+}
+
+const examples = [_][]const u8{
+    "blinky",
+    "interrupts",
+    "systick",
+};
+
+pub fn build(b: *std.Build) void {
+    const optimize = b.standardOptimizeOption(.{ .preferred_optimize_mode = .small });
+
+    const mz_dep = b.dependency("microzig", .{});
+    const mb = MicroBuild.init(b, mz_dep) orelse return;
+
+    inline for (examples) |example| {
+        add_example(b, mb, example, optimize);
+    }
+}

examples/wch/ch32h/build.zig.zon

@@ -0,0 +1,14 @@
+.{
+    .name = .examples_wch_ch32h,
+    .fingerprint = 0x98c6b66930eca2b,
+    .version = "0.0.0",
+    .dependencies = .{
+        .microzig = .{ .path = "../../.." },
+    },
+
+    .paths = .{
+        "build.zig",
+        "build.zig.zon",
+        "src",
+    },
+}

examples/wch/ch32h/src/blinky_v3f.zig

@@ -0,0 +1,40 @@
+const microzig = @import("microzig");
+
+pub const panic = microzig.panic;
+
+pub const std_options = microzig.std_options(.{});
+
+comptime {
+    _ = microzig.export_startup();
+}
+
+const cpu = microzig.cpu;
+const clocks = microzig.hal.clocks;
+const gpio = microzig.hal.gpio;
+
+const PFIC = microzig.chip.peripherals.PFIC;
+
+fn delay(cycles: u32) void {
+    for (0..cycles) |_| {
+        asm volatile ("nop");
+    }
+}
+
+pub fn main() !void {
+    clocks.init();
+    clocks.enable_gpio(.c);
+
+    const pc2: gpio.Pin = .{ .port = .c, .number = 2 };
+    pc2.apply(.{
+        .mode = .{ .output = .general_purpose_open_drain },
+        .speed = .max_50MHz,
+        .pull = .disabled,
+    });
+
+    cpu.wakeup_v5f();
+
+    while (true) {
+        pc2.toggle();
+        delay(20_000_000);
+    }
+}

examples/wch/ch32h/src/blinky_v5f.zig

@@ -0,0 +1,31 @@
+const microzig = @import("microzig");
+
+pub const panic = microzig.panic;
+
+pub const std_options = microzig.std_options(.{});
+
+comptime {
+    _ = microzig.export_startup();
+}
+
+const gpio = microzig.hal.gpio;
+
+fn delay(cycles: u32) void {
+    for (0..cycles) |_| {
+        asm volatile ("nop");
+    }
+}
+
+pub fn main() !void {
+    const pc3: gpio.Pin = .{ .port = .c, .number = 3 };
+    pc3.apply(.{
+        .mode = .{ .output = .general_purpose_open_drain },
+        .speed = .max_50MHz,
+        .pull = .disabled,
+    });
+
+    while (true) {
+        pc3.toggle();
+        delay(120_000_000);
+    }
+}

examples/wch/ch32h/src/interrupts_v3f.zig

@@ -0,0 +1,56 @@
+const microzig = @import("microzig");
+
+pub const panic = microzig.panic;
+
+pub const std_options = microzig.std_options(.{});
+
+comptime {
+    _ = microzig.export_startup();
+}
+
+const cpu = microzig.cpu;
+const clocks = microzig.hal.clocks;
+const gpio = microzig.hal.gpio;
+
+const PFIC = microzig.chip.peripherals.PFIC;
+
+pub const microzig_options: microzig.Options = .{
+    .interrupts = .{ .SW = sw_handler },
+};
+
+const pc2: gpio.Pin = .{ .port = .c, .number = 2 };
+
+fn sw_handler() callconv(cpu.riscv_calling_convention) void {
+    cpu.interrupt.clear_pending(.SW);
+
+    pc2.toggle();
+}
+
+fn delay(cycles: u32) void {
+    for (0..cycles) |_| {
+        asm volatile ("nop");
+    }
+}
+
+pub fn main() !void {
+    clocks.init();
+    clocks.enable_gpio(.c);
+
+    pc2.apply(.{
+        .mode = .{ .output = .general_purpose_open_drain },
+        .speed = .max_50MHz,
+        .pull = .disabled,
+    });
+
+    cpu.interrupt.enable(.SW);
+
+    if (cpu.current_core() != .v3f)
+        @panic("unexpected current core");
+
+    cpu.wakeup_v5f();
+
+    while (true) {
+        cpu.interrupt.set_pending(.SW);
+        delay(20_000_000);
+    }
+}

examples/wch/ch32h/src/interrupts_v5f.zig

@@ -0,0 +1,35 @@
+const microzig = @import("microzig");
+
+pub const panic = microzig.panic;
+
+pub const std_options = microzig.std_options(.{});
+
+comptime {
+    _ = microzig.export_startup();
+}
+
+const cpu = microzig.cpu;
+const gpio = microzig.hal.gpio;
+
+fn delay(cycles: u32) void {
+    for (0..cycles) |_| {
+        asm volatile ("nop");
+    }
+}
+
+pub fn main() !void {
+    if (cpu.current_core() != .v5f)
+        @panic("unexpected current core");
+
+    const pc3 = gpio.Pin{ .port = .c, .number = 3 };
+    pc3.apply(.{
+        .mode = .{ .output = .general_purpose_open_drain },
+        .speed = .max_50MHz,
+        .pull = .disabled,
+    });
+
+    while (true) {
+        pc3.toggle();
+        delay(120_000_000);
+    }
+}

examples/wch/ch32h/src/systick_v3f.zig

@@ -0,0 +1,58 @@
+const microzig = @import("microzig");
+
+pub const panic = microzig.panic;
+
+pub const std_options = microzig.std_options(.{});
+
+comptime {
+    _ = microzig.export_startup();
+}
+
+const cpu = microzig.cpu;
+const clocks = microzig.hal.clocks;
+const gpio = microzig.hal.gpio;
+const time = microzig.hal.time;
+
+const PFIC = microzig.chip.peripherals.PFIC;
+
+pub const microzig_options: microzig.Options = .{
+    .interrupts = .{
+        .SysTick1 = systick_handler,
+    },
+};
+
+const pc2: gpio.Pin = .{ .port = .c, .number = 2 };
+
+// By default, systick1 is allocated to v5f.
+// Here we demonstrate how to change this!
+const stk = time.systick1;
+
+fn systick_handler() callconv(cpu.riscv_calling_convention) void {
+    stk.clear_pending();
+    pc2.toggle();
+}
+
+pub fn main() !void {
+    clocks.init();
+    clocks.enable_gpio(.c);
+
+    pc2.apply(.{
+        .mode = .{ .output = .general_purpose_open_drain },
+        .speed = .max_50MHz,
+        .pull = .disabled,
+    });
+
+    stk.apply(.{
+        .core = .v3f,
+        .mode = .up,
+        .clock_source = .hclk,
+        .auto_reload = true,
+        .compare_value = 100_000_000,
+    });
+    stk.enable_interrupt();
+    stk.enable();
+
+    cpu.wakeup_v5f();
+
+    while (true) {}
+}

examples/wch/ch32h/src/systick_v5f.zig

@@ -0,0 +1,47 @@
+const microzig = @import("microzig");
+
+pub const panic = microzig.panic;
+
+pub const std_options = microzig.std_options(.{});
+
+comptime {
+    _ = microzig.export_startup();
+}
+
+const cpu = microzig.cpu;
+const gpio = microzig.hal.gpio;
+const time = microzig.hal.time;
+
+pub const microzig_options: microzig.Options = .{
+    .interrupts = .{
+        .SysTick0 = systick_handler,
+    },
+};
+
+const pc3: gpio.Pin = .{ .port = .c, .number = 3 };
+const stk = time.systick0;
+
+fn systick_handler() callconv(cpu.riscv_calling_convention) void {
+    stk.clear_pending();
+    pc3.toggle();
+}
+
+pub fn main() !void {
+    pc3.apply(.{
+        .mode = .{ .output = .general_purpose_open_drain },
+        .speed = .max_50MHz,
+        .pull = .disabled,
+    });
+
+    stk.apply(.{
+        .core = .v5f,
+        .mode = .up,
+        .clock_source = .hclk,
+        .auto_reload = true,
+        .compare_value = 50_000_000,
+    });
+    stk.enable_interrupt();
+    stk.enable();
+
+    while (true) {}
+}