Add configurable header to FreeRTOS module

modules/freertos/build.zig

@@ -1,26 +1,46 @@
 const std = @import("std");
 
-const FreeRTOSPort = enum {
+const FreeRTOS_Port = enum {
     RP2040,
     RP2350_ARM,
     RP2350_RISCV,
 };
 
+const FreeRTOS_Config = struct {
+    // Scheduler related
+    configUSE_IDLE_HOOK: bool = false,
+    configUSE_TICK_HOOK: bool = false,
+};
+
 pub fn build(b: *std.Build) void {
     const target = b.standardTargetOptions(.{});
     const optimize = b.standardOptimizeOption(.{});
 
     // Configurable options
     const port_name = b.option(
-        FreeRTOSPort,
+        FreeRTOS_Port,
         "port_name",
         "FreeRTOS port to use",
     ) orelse .RP2040;
 
+    const cfg_idle_hook = b.option(bool, "idle_hook", "Enable FreeRTOS idle hook") orelse false;
+    const cfg_tick_hook = b.option(bool, "tick_hook", "Enable FreeRTOS tick hook") orelse false;
+
     if (port_name != .RP2040 and port_name != .RP2350_ARM) {
         @panic("Right now only RP2040 and RP2350_ARM ports are supported");
     }
 
+    // In future this config might be validated against port-specific capabilities
+    const config = FreeRTOS_Config{
+        .configUSE_IDLE_HOOK = cfg_idle_hook,
+        .configUSE_TICK_HOOK = cfg_tick_hook,
+    };
+
+    const config_header = b.addConfigHeader(.{
+        .style = .{ .cmake = b.path("config/FreeRTOSConfig.h.cmake") },
+        .include_path = "FreeRTOSConfig.h",
+    }, config);
+
     const foundationlibc_dep = b.dependency("foundationlibc", .{
         .target = target,
         .optimize = optimize,
@@ -34,6 +54,8 @@ pub fn build(b: *std.Build) void {
 
     // Link libc
     freertos_lib.linkLibrary(foundationlibc_dep.artifact("foundation"));
+    // Add generated configuration header
+    freertos_lib.addConfigHeader(config_header);
 
     const freertos_kernel_dep = b.dependency("freertos_kernel", .{});
     const freertos_kernel_community_dep = b.dependency("freertos_kernel_community", .{});

modules/freertos/config/RP2350_ARM/FreeRTOSConfig.h → modules/freertos/config/FreeRTOSConfig.h.cmake

@@ -43,8 +43,9 @@
  /* Scheduler Related */
  #define configUSE_PREEMPTION                    1
  #define configUSE_TICKLESS_IDLE                 0
- #define configUSE_IDLE_HOOK                     0
- #define configUSE_TICK_HOOK                     0
+// FIXME: must be without indent to work, please fix (add indent) after Zig 0.16 release: https://codeberg.org/ziglang/zig/issues/31164
+#cmakedefine01 configUSE_IDLE_HOOK
+#cmakedefine01 configUSE_TICK_HOOK
  #define configTICK_RATE_HZ                      ( ( TickType_t ) 1000 )
  #define configMAX_PRIORITIES                    32
  #define configMINIMAL_STACK_SIZE                ( uint32_t ) 256
@@ -118,7 +119,7 @@
  #define configSUPPORT_PICO_SYNC_INTEROP         0
  #define configSUPPORT_PICO_TIME_INTEROP         0
 
- /* RP2350 required */
+ /* Dependent on processor */
  #define configENABLE_FPU                        1
  #define configENABLE_MPU                        0
  #define configENABLE_TRUSTZONE                  0