source: svn/branches/remocon/zasc/app_c/DST_nec_ir_sender.c

#include <stdio.h>
#include <stdlib.h>
#include "dst_eroum_interface.h"

//int nLEDState = 0;

// IR LED¸¦ Á¦¾îÇÏ´Â Äڵ带 È£ÃâÇØ¾ß ÇÔ
static void SetIRLED(int nOn)
{
        //nLEDState = nOn;
        // TO DO LED Control
        if(nOn==1)
        {
                DHL_SetLED(true,true);
        }
        else
        {
                DHL_SetLED(false,false);
        }

}

static void signal38k(bool bOn)
{
        int i;
        SetIRLED(bOn ? 1 : 0);
        for (i = 0; i < 1616; i++)
        {
                
        }
        SetIRLED(0);
        for (i = 0; i < 1616; i++)
        {
                
        }
}

static void signal(bool bOn, int nCount)
{
        int i;
        for (i = 0; i < nCount; i++)
        {
                signal38k(bOn);
        }
}

static void SendBit(int bOn)
{
        signal(true, 22);
        signal(false, bOn == 0 ? 21 : 64);
}

static void SendByte(unsigned char code)
{
        SendBit(code & 0x01);
        SendBit(code & 0x02);
        SendBit(code & 0x04);
        SendBit(code & 0x08);
        SendBit(code & 0x10);
        SendBit(code & 0x20);
        SendBit(code & 0x40);
        SendBit(code & 0x80);
}



void DST_NEC_IR_Send(unsigned char custom0, unsigned char custom1, unsigned char code)
{
        unsigned int flags = bos_enter_critical();
        // http://techdocs.altium.com/display/FPGA/NEC+Infrared+Transmission+Protocol
        // a 9ms leading pulse burst (16 times the pulse burst length used for a logical data bit)
        signal(true, 38*9);
        // a 4.5ms space
        signal(false, (38*9)/2);
        // the 8-bit address for the receiving device
        SendByte(custom0);
        // the 8-bit logical inverse of the address
        SendByte(custom1);
        // the 8-bit command
        SendByte(code);
        // the 8-bit logical inverse of the command
        SendByte(~code);
        // a final 562.5¥ìs pulse burst to signify the end of message transmission.
        SendBit(0);
        bos_exit_critical(flags);
}

#if 0
int main()
{
        DST_NEC_IR_Send(0x20, 0x20, 0x20); // CMB ¸®¸ðÄÜÀÇ Mute Å°
        return 0;
}
#endif