Icop PDX-089T-D5A-512 User Manual page 30

void BackLightON()
{
// Set register 4AH bit1 to 0 to enable GPIOB
outportb(0x3d4, 0x4a);
unsigned c = inport(0x3d5) & 0xfd;
outportb(0x3d4, 0x4a);
outportb(0x3d5, c);
// Set register 48H bit1
outportb(0x3d4, 0x48);
c = inport(0x3d5) | 0x02;
outportb(0x3d4, 0x48);
outportb(0x3d5, c);
}
void BackLightOFF()
{
// Set register 4AH bit1 to 0 to enable GPIOB
outportb(0x3d4, 0x4a);
unsigned c = inport(0x3d5) & 0xfd;
outportb(0x3d4, 0x4a);
outportb(0x3d5, c);
// Clear register 48H bit1
outportb(0x3d4, 0x48);
c = inport(0x3d5) & 0xfd;
outportb(0x3d4, 0x48);
outportb(0x3d5, c);
}
PDX-089T
DM&P Vortex86DX Panel PC with 8.9" WSVGA TFT LCD
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