LPC1114 红外遥控解码程序(RC5 )

时间：11-11 来源：互联网点击：

0; // short low, long high, ERROR
cmd = 0;
break;
case 6:RC5_Shift_Bit(1); // long low, short high, shift 1,0
RC5_Shift_Bit(0);
half_bit = 0; // new half bit is false
break;
case 7:sys = 0; // long low, long high, ERROR
cmd = 0;
default: break; // invalid
}
}
void PIOINT0_IRQHandler(void)
{
uint32_t regVal;
LPC_TMR16B0->TCR = 0; //disable timer
regVal =LPC_GPIO0->MIS & (0x1<0x01);//get interrupt status
if ( regVal )
{
if( (LPC_GPIO0->DATA & RC5_INPUT_PIN) == RC5_INPUT_PIN) // check rising or falling edge
{
if (sys == 0) // First pulse ?
{
low_time= HALF_BIT_TIME; // assume short low time
high_time = HALF_BIT_TIME; // assume short high time
half_bit= 1; // assume half bit is true
cmd = 0x02; // = 00000010, prepare command byte
}
else
low_time = LPC_TMR16B0->TC; // rising, so capture low time
RC5_Decode();
}
else
high_time = LPC_TMR16B0->TC; // falling, so capture high time
}
LPC_TMR16B0->TCR = 1; //enable timer
LPC_TMR16B0->TCR = 2; //reset timer
LPC_GPIO0->IC |= ( 0x1 < 0x01);//clear interrupt
LPC_TMR16B0->TCR = 1; //enable timer
}
void TIMER16_0_IRQHandler(void)
{
if ( LPC_TMR16B0->IR & 0x1 )
{
//timeout has occured.
if (cmd & 0x80) // command full ?
{
RC5_Command = cmd & 0x7F; // OK ! Save command byte
RC5_System = sys; // save system byte
RC5_flag = 1; // set event to application
}
sys = 0;
cmd = 0;
}
LPC_TMR16B0->IR = 1; // clear interrupt flag
}

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