Nintendo 3DS >> C/C++
LCD Backlight
參考資訊：
1. sda-cpp
2. libctru doc
3. 3ds-examples
說明：
| API |
|---|
| Result GSPGPU_ReadHWRegs(u32 regAddr, u32* data, u8 size) |
| Result GSPGPU_WriteHWRegs(u32 regAddr, const u32* data, u8 size) |
main.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <3ds.h>
#ifndef REG_LCDBACKLIGHTMAIN
#define REG_LCDBACKLIGHTMAIN (u32)(0x1ED02240 - 0x1EB00000)
#endif
#ifndef REG_LCDBACKLIGHTSUB
#define REG_LCDBACKLIGHTSUB (u32)(0x1ED02A40 - 0x1EB00000)
#endif
int main(void)
{
u32 brightnessMain = 0, brightnessSub = 0, off = 0;
gfxInitDefault();
consoleInit(GFX_TOP, NULL);
GSPGPU_ReadHWRegs(REG_LCDBACKLIGHTMAIN, &brightnessMain, 4);
GSPGPU_ReadHWRegs(REG_LCDBACKLIGHTSUB, &brightnessSub, 4);
printf("backlight main=%d, sub=%d\n", brightnessMain, brightnessSub);
svcSleepThread(3000000000LL);
GSPGPU_WriteHWRegs(REG_LCDBACKLIGHTMAIN, &off, 4);
GSPGPU_WriteHWRegs(REG_LCDBACKLIGHTSUB, &off, 4);
svcSleepThread(3000000000LL);
GSPGPU_WriteHWRegs(REG_LCDBACKLIGHTMAIN, &brightnessMain, 4);
GSPGPU_WriteHWRegs(REG_LCDBACKLIGHTSUB, &brightnessSub, 4);
gspWaitForVBlank();
gfxSwapBuffers();
svcSleepThread(3000000000LL);
gfxExit();
return 0;
}