add extern "C" to matrix.cpp

keyboards/converter/usb_usb/matrix.cpp

@@ -83,19 +83,21 @@ KBDReportParser kbd_parser3;
 KBDReportParser kbd_parser4;
 
 
-uint8_t matrix_rows(void) { return MATRIX_ROWS; }
-uint8_t matrix_cols(void) { return MATRIX_COLS; }
-bool matrix_has_ghost(void) { return false; }
-void matrix_init(void) {
+extern "C"
+{
+    uint8_t matrix_rows(void) { return MATRIX_ROWS; }
+    uint8_t matrix_cols(void) { return MATRIX_COLS; }
+    bool matrix_has_ghost(void) { return false; }
+    void matrix_init(void) {
         // USB Host Shield setup
         usb_host.Init();
         kbd1.SetReportParser(0, (HIDReportParser*)&kbd_parser1);
         kbd2.SetReportParser(0, (HIDReportParser*)&kbd_parser2);
         kbd3.SetReportParser(0, (HIDReportParser*)&kbd_parser3);
         kbd4.SetReportParser(0, (HIDReportParser*)&kbd_parser4);
-}
+    }
 
-static void or_report(report_keyboard_t report) {
+    static void or_report(report_keyboard_t report) {
         // integrate reports into keyboard_report
         keyboard_report.mods |= report.mods;
         for (uint8_t i = 0; i < KEYBOARD_REPORT_KEYS; i++) {
@@ -108,9 +110,9 @@ static void or_report(report_keyboard_t report) {
                 }
             }
         }
-}
+    }
 
-uint8_t matrix_scan(void) {
+    uint8_t matrix_scan(void) {
         static uint16_t last_time_stamp1 = 0;
         static uint16_t last_time_stamp2 = 0;
         static uint16_t last_time_stamp3 = 0;
@@ -165,13 +167,13 @@ uint8_t matrix_scan(void) {
             }
         }
         return 1;
-}
+    }
 
-bool matrix_is_modified(void) {
+    bool matrix_is_modified(void) {
         return matrix_is_mod;
-}
+    }
 
-bool matrix_is_on(uint8_t row, uint8_t col) {
+    bool matrix_is_on(uint8_t row, uint8_t col) {
         uint8_t code = CODE(row, col);
 
         if (IS_MOD(code)) {
@@ -185,9 +187,9 @@ bool matrix_is_on(uint8_t row, uint8_t col) {
             }
         }
         return false;
-}
+    }
 
-matrix_row_t matrix_get_row(uint8_t row) {
+    matrix_row_t matrix_get_row(uint8_t row) {
         uint16_t row_bits = 0;
 
         if (IS_MOD(CODE(row, 0)) && keyboard_report.mods) {
@@ -202,9 +204,9 @@ matrix_row_t matrix_get_row(uint8_t row) {
             }
         }
         return row_bits;
-}
+    }
 
-uint8_t matrix_key_count(void) {
+    uint8_t matrix_key_count(void) {
         uint8_t count = 0;
 
         count += bitpop(keyboard_report.mods);
@@ -214,21 +216,23 @@ uint8_t matrix_key_count(void) {
             }
         }
         return count;
-}
+    }
 
-void matrix_print(void) {
+    void matrix_print(void) {
         print("\nr/c 0123456789ABCDEF\n");
         for (uint8_t row = 0; row < matrix_rows(); row++) {
             xprintf("%02d: ", row);
             print_bin_reverse16(matrix_get_row(row));
             print("\n");
         }
-}
+    }
 
-void led_set(uint8_t usb_led)
-{
+    void led_set(uint8_t usb_led)
+    {
         kbd1.SetReport(0, 0, 2, 0, 1, &usb_led);
         kbd2.SetReport(0, 0, 2, 0, 1, &usb_led);
         kbd3.SetReport(0, 0, 2, 0, 1, &usb_led);
         kbd4.SetReport(0, 0, 2, 0, 1, &usb_led);
-}
+    }
+
+};