Use timer for continuous scrolling

source/hid.c

@@ -1,14 +1,16 @@
 #include "hid.h"
+#include "timer.h"
 
 u32 InputWait() {
     u32 pad_state_old = HID_STATE;
+    timer_start();
     while (true) {
         u32 pad_state = HID_STATE;
         if (!(~pad_state & BUTTON_ANY)) { // no buttons pressed
             pad_state_old = pad_state;
             continue;
         }
-        if (pad_state == pad_state_old)
+        if ((pad_state == pad_state_old) && (!(pad_state & BUTTON_ARROW) || timer_msec() < 120))
             continue;
         //Make sure the key is pressed
         u32 t_pressed = 0;

source/hid.h

@@ -17,5 +17,6 @@
 #define BUTTON_X      (1 << 10)
 #define BUTTON_Y      (1 << 11)
 #define BUTTON_ANY    0x00000FFF
+#define BUTTON_ARROW  (BUTTON_RIGHT|BUTTON_LEFT|BUTTON_UP|BUTTON_DOWN)
 
 u32 InputWait();

source/timer.c

@@ -0,0 +1,36 @@
+#include "timer.h"
+
+void timer_start( void ) {
+    // reset / deactivate timers
+    *TIMER_CNT0 = 0;
+    *TIMER_CNT1 = *TIMER_CNT2 = *TIMER_CNT3 = TIMER_COUNT_UP;
+    *TIMER_VAL0 = *TIMER_VAL1 = *TIMER_VAL2 = *TIMER_VAL3 = 0;
+
+    // start timers
+    *TIMER_CNT0 = TIMER_ACTIVE;
+    *TIMER_CNT1 = *TIMER_CNT2 = *TIMER_CNT3 = TIMER_ACTIVE | TIMER_COUNT_UP;
+}
+
+void timer_stop( void ) {
+    *TIMER_CNT0 &= ~TIMER_ACTIVE;
+    *TIMER_CNT1 &= ~TIMER_ACTIVE;
+    *TIMER_CNT2 &= ~TIMER_ACTIVE;
+    *TIMER_CNT3 &= ~TIMER_ACTIVE;
+}
+
+u64 timer_ticks( void ) {
+    u64 ticks = 0;
+    ticks |= (u64) *TIMER_VAL0 <<  0;
+    ticks |= (u64) *TIMER_VAL1 << 16;
+    ticks |= (u64) *TIMER_VAL2 << 32;
+    ticks |= (u64) *TIMER_VAL3 << 48;
+    return ticks;
+}
+
+u64 timer_msec( void ) {
+    return (timer_ticks() * 1000) / TICKS_PER_SEC;
+}
+
+u64 timer_sec( void ) {
+    return timer_ticks() / TICKS_PER_SEC;
+}

source/timer.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include "common.h"
+
+// see: https://www.3dbrew.org/wiki/TIMER_Registers
+#define TIMER_VAL0  ((vu16*)0x10003000)
+#define TIMER_VAL1  ((vu16*)0x10003004)
+#define TIMER_VAL2  ((vu16*)0x10003008)
+#define TIMER_VAL3  ((vu16*)0x1000300C)
+#define TIMER_CNT0  ((vu16*)0x10003002)
+#define TIMER_CNT1  ((vu16*)0x10003006)
+#define TIMER_CNT2  ((vu16*)0x1000300A)
+#define TIMER_CNT3  ((vu16*)0x1000300E)
+
+#define TIMER_COUNT_UP  0x0004
+#define TIMER_ACTIVE    0x0080
+#define TICKS_PER_SEC   67027964ULL
+
+void timer_start( void );
+void timer_stop( void );
+u64 timer_ticks( void );
+u64 timer_msec( void );
+u64 timer_sec( void );