feat: add handler for DDR GRAND PRIX controller (BF110)

CMakeLists.txt

@@ -60,6 +60,7 @@ add_executable(${PROJECT_NAME}
     handlers/zuiki.c
     handlers/santroller.c
     handlers/b2l.c
+    handlers/ddr_grandprix.c
 
     ${PICO_TINYUSB_PATH}/src/portable/raspberrypi/pio_usb/dcd_pio_usb.c
     ${PICO_TINYUSB_PATH}/src/portable/raspberrypi/pio_usb/hcd_pio_usb.c

README.md

@@ -41,6 +41,7 @@ make all -j$(nproc)
 * icedragon.io Snek Board (DDR, GF, DM)
 * StepManiaX
 * LTEK
+* Konami DDR GRAND PRIX Controller (BF110)
 * Born to Lead (B2L)
 * Gamo2 PHOENIXWAN
 * RedOctane X-Plorer

handlers/__handlers.c

@@ -20,6 +20,7 @@
 #include "handlers/zuiki.h"
 #include "handlers/santroller.h"
 #include "handlers/b2l.h"
+#include "handlers/ddr_grandprix.h"
 
 uint64_t prev_output_report_time = 0;
 uint64_t prev_btn_sampling_time = 0;
@@ -102,6 +103,10 @@ handler_type determine_handler(uint8_t dev_addr)
     {
         rtn = HANDLER_B2L;
     }
+    else if (is_DDR_GRANDPRIX(dev_addr))
+    {
+        rtn = HANDLER_DDR_GRANDPRIX;
+    }
 
     return rtn;
 }

handlers/__handlers.h

@@ -40,6 +40,8 @@ typedef enum
     HANDLER_B2L,
     HANDLER_STAC2,
 
+    HANDLER_DDR_GRANDPRIX,
+
 } handler_type;
 
 handler_type determine_handler(uint8_t dev_addr);

handlers/ddr_grandprix.c

@@ -0,0 +1,33 @@
+#include "ddr_grandprix.h"
+#include <string.h>
+#include "input_report.h"
+
+bool is_DDR_GRANDPRIX(uint8_t dev_addr)
+{
+    uint16_t vid, pid;
+    tuh_vid_pid_get(dev_addr, &vid, &pid);
+
+    return (vid == DDR_GRANDPRIX_VID && pid == DDR_GRANDPRIX_PID);
+}
+
+void processDDR_GRANDPRIX(uint8_t const *report, uint16_t len)
+{
+    if (len >= sizeof(ddr_grandprix_report_t))
+    {
+        ddr_grandprix_report_t new_ddr_state = {0};
+        memcpy(&new_ddr_state, report, sizeof(new_ddr_state));
+
+        reset_report();
+
+        input_report.short_report.select = new_ddr_state.btn_l;
+        input_report.short_report.start = new_ddr_state.btn_r;
+
+        input_report.short_report.dpad_up = new_ddr_state.dpad_up;
+        input_report.short_report.dpad_right = new_ddr_state.dpad_right;
+        input_report.short_report.dpad_down = new_ddr_state.dpad_down;
+        input_report.short_report.dpad_left = new_ddr_state.dpad_left;
+
+        input_report.short_report.btn_east = new_ddr_state.btn_circle;
+        input_report.short_report.btn_south = new_ddr_state.btn_cross;
+    }
+}

handlers/ddr_grandprix.h

@@ -0,0 +1,42 @@
+#ifndef _DDR_GRANDPRIX_H_
+#define _DDR_GRANDPRIX_H_
+
+#include <stdint.h>
+
+#include "tusb.h"
+
+#include "common_types.h"
+
+#define DDR_GRANDPRIX_VID 0x1CCF
+#define DDR_GRANDPRIX_PID 0x1020
+
+#pragma pack(push, 1)
+
+typedef struct
+{
+    int8_t x; // X axis (-127 to 127)
+    int8_t y; // Y axis (-127 to 127)
+
+    // Buttons as bitfields
+    uint16_t btn_l : 1;     // Button 1 (L button)
+    uint16_t btn_r : 1;      // Button 2 (R button)
+    uint16_t dpad_up : 1;    // Button 3 (Up)
+    uint16_t dpad_right : 1; // Button 4 (Right)
+    uint16_t dpad_down : 1;  // Button 5 (Down)
+    uint16_t dpad_left : 1;  // Button 6 (Left)
+    uint16_t _reserved1 : 2; // padding
+
+    uint16_t btn_circle : 1; // Button 9 (Circle)
+    uint16_t btn_cross : 1;  // Button 10 (Cross)
+    uint16_t _reserved2 : 6; // padding to
+
+    uint8_t padding; // extra padding
+} ddr_grandprix_report_t;
+
+#pragma pack(pop)
+
+bool is_DDR_GRANDPRIX(uint8_t dev_addr);
+
+void processDDR_GRANDPRIX(uint8_t const *report, uint16_t len);
+
+#endif

main.c

@@ -42,6 +42,7 @@
 #include "handlers/zuiki.h"
 #include "handlers/santroller.h"
 #include "handlers/b2l.h"
+#include "handlers/ddr_grandprix.h"
 
 //--------------------------------------------------------------------+
 // MACRO CONSTANT TYPEDEF PROTYPES
@@ -504,6 +505,7 @@ void tuh_hid_report_received_cb(uint8_t dev_addr, uint8_t instance, uint8_t cons
           DISPATCH_NEW_REPORT(FUSION_HID)
           DISPATCH_NEW_REPORT(SANTROLLER)
           DISPATCH_NEW_REPORT(B2L)
+          DISPATCH_NEW_REPORT(DDR_GRANDPRIX)
         default:
           DebugPrintf("Unknown handler type for dev %d:%d", dev_addr, instance);
           DebugOutputBuffer("RPT:", report, len);