First upload. Untested software

main.c

@@ -0,0 +1,80 @@
+/* Baremetal Risc-V USB <=> Amiga Joystick/Mouse HID converter. 
+ * March 2026 - Anders Holck
+ * This software has no license. If you choose to use, please include my name :)
+*/
+
+#include <stdint.h>
+#include "usb_dwc2.h"
+#include "pinmux.h"
+#include "amiga_hw.h"
+
+void delay(int count) {
+    for (volatile int i = 0; i < count; i++);
+}
+
+void usb_init_baremetal() {
+    // 1. Enable USB Clocks
+    uint32_t clk_en = read32(CLK_EN_1);
+    clk_en |= (1 << 13) | (1 << 14); 
+    write32(CLK_EN_1, clk_en);
+
+    // 2. Power on PHY and release reset
+    write32(USB_PHY_CTRL, 0x07);
+    delay(10000);
+
+    // 3. Global Reset of DWC2 Core
+    write32(GRSTCTL, (1 << 0)); // Soft Reset
+    while (!(read32(GRSTCTL) & (1 << 29)));
+    delay(10000);
+    
+    // 4. Force Device Mode and Basic Config
+    write32(GUSBCFG, (1 << 30) | (1 << 29)); // Force Device, PHY Interface
+    write32(DCFG, 0x0); // Full Speed
+    write32(GINTMSK, (1 << 12) | (1 << 13) | (1 << 4) | (1 << 18)); // Reset, Enum, RXFLVL, IEPInt
+    
+    // 5. Connect
+    write32(DCTL, 0); // Clear Soft Disconnect
+}
+
+int main() {
+    pinmux_init_amiga();
+    usb_init_baremetal();
+
+    amiga_input_t input;
+    uint8_t hid_report[4] = {0}; // 2 bytes buttons, 2 bytes mouse
+    uint32_t report_timer = 0;
+
+    while (1) {
+        // 1. Poll Amiga Hardware
+        amiga_hw_poll(&input);
+
+        // 2. Poll USB State Machine
+        dwc2_poll();
+
+        // 3. Send HID Report every ~10ms (approximate)
+        if (++report_timer > 100) {
+            report_timer = 0;
+            
+            // Format HID Report (Match hid_report_desc in usb_descriptors.h)
+            // Byte 0: Joy1 (5 bits) + Joy2 (3 bits)
+            // Byte 1: Joy2 (remaining 2 bits) + Padding
+            // Byte 2: Mouse X
+            // Byte 3: Mouse Y
+            
+            hid_report[0] = input.joy1 | ((input.joy2 & 0x07) << 5);
+            hid_report[1] = (input.joy2 >> 3) & 0x03;
+            if (input.buttons & 0x01) hid_report[1] |= (1 << 2); // Mouse B1
+            if (input.buttons & 0x02) hid_report[1] |= (1 << 3); // Mouse B2
+            
+            hid_report[2] = (uint8_t)input.mouse_x;
+            hid_report[3] = (uint8_t)input.mouse_y;
+
+            // Send via Endpoint 1 (Interrupt IN)
+            dwc2_send_packet(1, hid_report, 4);
+        }
+
+        delay(100);
+    }
+
+    return 0;
+}