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Toggle power LED on START+Y #225

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Toggle power LED on START+Y #225

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d056301
Turn off power LED on Y+down
alexisbietti Mar 9, 2025
8e0537a
Toggle LED instead of just turning it off. Map to START+Y.
alexisbietti Mar 9, 2025
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2 changes: 2 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,8 @@ SELECT+Y - Dump hardware frame output to `/3ds/open_agb_firm/screenshots/YYYY_MM
* The file name is the current date and time from your real-time clock.
* If the screen output freezes, press HOME to fix it. This is a hard to track down bug that will be fixed.

START+Y - Toggle power LED on/off.

X+UP/DOWN - Adjust screen brightness up or down by `backlightSteps` units.

X+LEFT - Turn off LCD backlight.
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21 changes: 20 additions & 1 deletion source/arm11/open_agb_firm.c
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Expand Up @@ -41,7 +41,7 @@


static KHandle g_frameReadyEvent = 0;

static PwrLedPattern g_lastPowerLEDPattern = MCU_PWR_LED_AUTO;


static u32 fixRomPadding(const u32 romFileSize)
Expand Down Expand Up @@ -122,13 +122,32 @@ void changeBacklight(s16 amount)
GFX_setLcdLuminance(newVal);
}

void togglePowerLED()
{
PwrLedPattern currentPattern = MCU_getPowerLedPattern();
if (currentPattern == MCU_PWR_LED_OFF)
{
// Restore last know pattern.
MCU_setPowerLedPattern(g_lastPowerLEDPattern);
}
else
{
MCU_setPowerLedPattern(MCU_PWR_LED_OFF);
}
g_lastPowerLEDPattern = currentPattern;
}

static void updateBacklight(void)
{
// Check for special button combos.
const u32 kHeld = hidKeysHeld();
static bool backlightOn = true;
if(hidKeysDown() && kHeld)
{
// Toggle power LED.
if (kHeld == (KEY_Y | KEY_START))
togglePowerLED();

// Adjust LCD brightness up.
const s16 steps = g_oafConfig.backlightSteps;
if(kHeld == (KEY_X | KEY_DUP))
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