4-key-send.c

24e1接收按键程序

/* wireless.c ================================================================================================

 *=============================================================================================================
*/
#include <reg24e1.h>
#define uchar unsigned char
#define uint unsigned int
#define ADDR_INDEX  8                       // 在 RFConfig.buf 地址字节的指针
#define ADDR_COUNT  4                       // 地址字节的数目
#define num_buf         24                      // 缓冲区的大小
#define num_RTcon      15 
//定义io端口
sbit p00=P0^0;
sbit p01=P0^1;
sbit p02=P0^2;
sbit p03=P0^3;
sbit p04=P0^4;
sbit p05=P0^5;
sbit p06=P0^6;
sbit p07=P0^7;

bit flag_int1=0;//extern interrupte 1
bit flag_mORs=1;  //1:master,transmitter; 
				  //0:slave,reciever


volatile unsigned char idata RxBuf[num_buf];  //rec buf
volatile unsigned char idata TxBuf[num_buf];  //tran buf
volatile unsigned char idata Rxcheck[num_buf];  //rec buf
const  RxTxConf[15] =   //发射接收配置
{

  0xc0, 0xc0, 0x00, 0xab, 0xbc, 0x13, 0x35, 0x00,
    0xaa, 0xbb, 0x12, 0x34, 0x80, 0xef, 0x04
};

void Delay100us(volatile uint n)//delay 100US
{
    unsigned char i;
    while(n--)
        for(i=0;i<35;i++)
            ;
}
//--------------------------------led flash
void LED(void) 
{
   unsigned char i;
   for(i=1;i<3;i++)
    {
    p07=1; 
	Delay100us(2540);
    p07=0; 
    Delay100us(2540);
	}    
}
//----------------------------------------------SPI 读写函数
unsigned char SpiReadWrite(unsigned char b) 
{
    EXIF &= ~0x20;                          // 清除 SPI 中断
    SPI_DATA = b;                           // 发送字节到SPI数据寄存器
    while((EXIF & 0x20) == 0x00)            // 一直等到SPI完成通信
        ;
    return SPI_DATA;
}
//---------------------------------------------------set 24e1 to RX
void SetRxMode(void)
{
    CS = 1;
    Delay100us(0);
    SpiReadWrite(RxTxConf[num_RTcon-1] | 0x01);
    CS = 0;
}

void SetTxMode(void)								//set 24e1 to TX
{
    CS = 1;
    Delay100us(0);
    SpiReadWrite(RxTxConf[num_RTcon-1]);
    CS = 0;
}


//--------------------------------------------------------//初始化函数
void Init(void)  			   
{
    unsigned char i;
for(i=0;i<num_buf;i++)
	{
	TxBuf[i]=i;
	Rxcheck[i]=i;
	}
	P0_DIR	= 0x00;
	P0_ALT = 0x00;
//************ SPI:       
    SPICLK = 0x00;                          // 最大SPI时钟 (=CLK/8)
    SPI_CTRL = 0x02;                        // 连接SPI到射频CH1
//************ INT1: 
	P0_DIR |= 0x10;
	P0_ALT |= 0x10; 
//	IT1      = 0;//低电平有效
	EX1      = 1;//外部中断允许
//	PX1=1;//高优先级
	flag_int1=0;
// **********RADIO:
    PWR_UP = 1;
    Delay100us(40);                         // 等待大于3ms   
    CE = 0;
    CS = 1;                                 // RF SPI CE=0 CS = 1 配置使用
    Delay100us(0);
    for(i=0;i<num_RTcon;i++)
        SpiReadWrite(RxTxConf[i]);
    CS = 0;
//************* 
 // IE = 0x95; 
EA = 1;                                 // 开启全局中断

	
}
//-----------------------------------------------------uart send ont byte
void tbyte(uchar temp_T_byte)
{ 
SBUF = temp_T_byte;
while(TI==0);
TI=0;
}
//-----------------------------------------------------rf send ont packet
void TxPacket(void)//发送包
{
    unsigned char i;
    
    CE = 1;
    Delay100us(0);
    // 所有包开始地址
    for (i=0;i<ADDR_COUNT;i++)
    {
        SpiReadWrite(RxTxConf[ADDR_INDEX+i]);
    }
    /*从发送缓冲区读取包和通过SPI在线指令写到射频*/        

    for (i=0;i<num_buf;i++)
    {
        EXIF &= ~0x20;                      // 清除SPI中断
        SPI_DATA = TxBuf[i];               // 发送数据到SPI数据寄存器
        while((EXIF & 0x20) == 0x00)        // 一直等到SPI完成通信
            ;        
    }
    CE = 0;
	Delay100us(30);
}
//-----------------------------------------------------rf rec packet
void RxPacket(void)
{
    unsigned char  index_Rbuf=0;
    while(DR1)
    	{         
        EXIF &= ~0x20;                      // 清除SPI中断
        SPI_DATA = 0;                       // 写空字节到SPI数据寄存器
        while((EXIF & 0x20) == 0x00)        // 一直等到SPI完成接收
            ;
        RxBuf[index_Rbuf] = SPI_DATA;//save to RX buf
		tbyte( RxBuf[index_Rbuf]);   //send to pc by uart
		index_Rbuf+=1;
    	}
		index_Rbuf=0;
}
uchar checkrec(void)
{
  unsigned char i,j;
for(i=0,j=0;i<num_buf;i++)
if(Rxcheck[i]=RxBuf[i])
j+=1;
if(j==23)
return 1;
else return 0;
}
//=----------------------------------------------- interrupt service

void service_int1() interrupt 2 
{
EX1=0;
  flag_int1=1;
}
//---------------------------------------------------main function
void main(void)
{
	unsigned char i;
   	Init();                                 // 初始化
	LED();
	SetRxMode();
	P0=0;
	CE = 1;
    Delay100us(30);
	while(1)
		{
		if(flag_int1)
			{
			SetTxMode();
			//while(1)
			TxPacket();
			SetRxMode();
			CE = 1;
 		    Delay100us(30);
			flag_int1=0;
			Delay100us(9250);
			EX1=1;
			}
		if(DR1)
			{		
			RxPacket();
			if(checkrec())
				{
				i+=1;
				P0=0x40|(i/10);
				P0=0x20|(i%10);
				if(i>98)
				i=0;
				}	
			}
		
	}

}