Initial commit

switch_pro_driver.h

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+/*
+ * Minimal Switch Pro controller emulation glue derived from the GP2040-CE
+ * SwitchProDriver. The driver keeps the same descriptors/handshake while
+ * exposing a simple API for feeding inputs.
+ */
+
+#pragma once
+
+#include <stdbool.h>
+#include <stdint.h>
+#include "switch_pro_descriptors.h"
+
+typedef struct {
+    bool dpad_up;
+    bool dpad_down;
+    bool dpad_left;
+    bool dpad_right;
+
+    bool button_a;
+    bool button_b;
+    bool button_x;
+    bool button_y;
+    bool button_l;
+    bool button_r;
+    bool button_zl;
+    bool button_zr;
+    bool button_plus;
+    bool button_minus;
+    bool button_home;
+    bool button_capture;
+    bool button_l3;
+    bool button_r3;
+
+    uint16_t lx; // 0-65535
+    uint16_t ly;
+    uint16_t rx;
+    uint16_t ry;
+} SwitchInputState;
+
+// Initialize USB state and calibration before entering the main loop.
+void switch_pro_init();
+
+// Update the desired controller state for the next USB report.
+void switch_pro_set_input(const SwitchInputState& state);
+
+// Drive the Switch Pro USB state machine; call this frequently in the main loop.
+void switch_pro_task();
+
+// Convert a packed UART message into controller state (returns true if parsed).
+bool switch_pro_apply_uart_packet(const uint8_t* packet, uint8_t length);