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Add low battery shutoff support #260

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Add low battery shutoff support #260

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86c8ae7
Add low battery shutoff support
subtervisor Nov 28, 2025
1e65162
Revert "Add low battery shutoff support"
subtervisor Dec 19, 2025
a427248
Switch to using HID event
subtervisor Jan 6, 2026
2a2e051
Add missing header refs
subtervisor Jan 6, 2026
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1 change: 1 addition & 0 deletions include/arm11/open_agb_firm.h
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,7 @@ extern "C"
#endif

Result oafParseConfigEarly(void);
bool shouldExit(u32 extraKeys);
void changeBacklight(s16 amount);
Result oafInitAndRun(void);
void oafUpdate(void);
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3 changes: 2 additions & 1 deletion source/arm11/filebrowser.c
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@
#include "error_codes.h"
#include "fs.h"
#include "util.h"
#include "arm11/open_agb_firm.h"
#include "arm11/drivers/hid.h"
#include "arm11/fmt.h"
#include "drivers/gfx.h"
Expand Down Expand Up @@ -167,7 +168,7 @@ Result browseFiles(const char *const basePath, char selected[512])
GFX_waitForVBlank0();

hidScanInput();
if(hidGetExtraKeys(0) & (KEY_POWER_HELD | KEY_POWER)) goto end;
if(shouldExit(hidGetExtraKeys(0))) goto end;
kDown = hidKeysDown();
} while(kDown == 0);

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2 changes: 1 addition & 1 deletion source/arm11/main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -41,7 +41,7 @@ int main(void)
while(1)
{
hidScanInput();
if(hidGetExtraKeys(0) & (KEY_POWER_HELD | KEY_POWER)) break;
if(shouldExit(hidGetExtraKeys(0))) break;

oafUpdate();
}
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7 changes: 7 additions & 0 deletions source/arm11/open_agb_firm.c
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Expand Up @@ -100,6 +100,13 @@ static Result loadGbaRom(const char *const path, u32 *const romSizeOut)
return res;
}

bool shouldExit(u32 extraKeys)
{
// Exit if power button is held or low battery alarm fires for 5% or lower
return (extraKeys & (KEY_POWER_HELD | KEY_POWER)) ||
((extraKeys & KEY_LOW_BATTERY) && (MCU_getBatteryLevel() <= 6));
}

void changeBacklight(s16 amount)
{
u8 min, max;
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5 changes: 3 additions & 2 deletions source/arm11/patch.c
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Expand Up @@ -21,6 +21,7 @@
#include "types.h"
#include "oaf_error_codes.h"
#include "util.h"
#include "arm11/open_agb_firm.h"
#include "arm11/drivers/hid.h"
#ifndef NDEBUG
#include "arm11/drivers/mcu.h"
Expand Down Expand Up @@ -323,7 +324,7 @@ Result patchRom(const char *const gamePath, u32 *romSize) {
while(1){
hidScanInput();
if(hidKeysHeld() == (KEY_Y | KEY_DUP) && hidKeysDown() != 0) break;
if(hidGetExtraKeys(0) & (KEY_POWER_HELD | KEY_POWER)) power_off();
if(shouldExit(hidGetExtraKeys(0))) power_off();
}
}

Expand All @@ -350,7 +351,7 @@ Result patchRom(const char *const gamePath, u32 *romSize) {
while(1){
hidScanInput();
if(hidKeysHeld() == (KEY_Y | KEY_DUP) && hidKeysDown() != 0) break;
if(hidGetExtraKeys(0) & (KEY_POWER_HELD | KEY_POWER)) power_off();
if(shouldExit(hidGetExtraKeys(0))) power_off();
}
}

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3 changes: 2 additions & 1 deletion source/arm11/save_type.c
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@

#include <string.h>
#include "types.h"
#include "arm11/open_agb_firm.h"
#include "arm11/save_type.h"
#include "drivers/lgy_common.h"
#include "arm11/fmt.h"
Expand Down Expand Up @@ -255,7 +256,7 @@ u16 getSaveType(const OafConfig *const cfg, const u32 romSize, const char *const
GFX_waitForVBlank0();

hidScanInput();
if(hidGetExtraKeys(0) & (KEY_POWER_HELD | KEY_POWER)) goto end;
if(shouldExit(hidGetExtraKeys(0))) goto end;
kDown = hidKeysDown();
} while(kDown == 0);

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