diff --git a/24l01.c b/24l01.c
index 4ad868c..cfacee7 100644
--- a/24l01.c
+++ b/24l01.c
@@ -34,8 +34,9 @@ void NRF24L01_Init(void)
   
   SPI2_Init();
   
-  Clr_NRF24L01_CE;
-  Set_NRF24L01_CSN;
+  Clr_NRF24L01_CE;   //ENABLE 24L01
+  Set_NRF24L01_CSN;  //CANCLE SPI_CS
+}
   /**检测24L01是否存在，返回值为1则失败，返回值为0则成功**/
   u8 NRF24L01_Check(void)
   {
@@ -49,4 +50,109 @@ void NRF24L01_Init(void)
       return 1;
      return 0;
   }
+
+u8 NRF24L01_Write_Reg(u8 reg,u8 value)
+{
+  u8 status;
+  Clr_NRF24L01_CSN;    //ENABLE SPI
+  SPIx_ReadWriteByte(reg);
+  reg_val = SPIx_ReadWriteByte(0XFF);
+  Set_NRF24L01_CSN;    //DISABLE SPI
+  return(reg_val);
 }
+
+u8 NRF24L01_Read_Reg(u8 reg)
+	{
+	u8 reg_val;	    
+	Clr_NRF24L01_CSN;         		
+	SPIx_ReadWriteByte(reg);   
+	reg_val=SPIx_ReadWriteByte(0XFF);
+	Set_NRF24L01_CSN;          	    
+	return(reg_val);           
+	}	
+
+u8 NRF24L01_Read_Buf(u8 reg, u8 *pBuf, u8 len)
+{
+  u8 status, u8_ctr;
+  Clr_NRF24L01_CSN;     //ENABLE SPI
+  status = SPIx_ReadWriteByte(reg);
+  for(u8_ctr = 0 ; u8_ctr < len ; u8_ctr ++)
+    pBuf[u8_ctr] = SPIx_ReadWriteByte(0XFF);
+  Set_NRF24L01_CSN      //DISABLE SPI
+  return status;
+}
+
+u8 NRF24L01_Write_Buf(u8 reg, u8 *pBuf, u8 len)
+	{
+	u8 status,u8_ctr;	    
+	Clr_NRF24L01_CSN;          
+	status = SPIx_ReadWriteByte(reg);
+	for(u8_ctr=0; u8_ctr<len; u8_ctr++)
+    SPIx_ReadWriteByte(*pBuf++); 
+	Set_NRF24L01_CSN;       
+	return status;          
+	}
+
+u8 NRF24L01_TxPacket(u8 *txbuf)
+{
+  u8 sta;
+  Clr_NRF24L01_CE;    //ENABLE 24L01
+  NRF24L01_Write_Buf(NRF24L01_WR_TX_PLOAD,txbuf,sta);
+  Set_NRF24L01_CE;    //
+  while(NRF24L01_IRQ != 0);
+  sta = NRF24L01_Read_Reg(STATUS);
+  NRF24L01_Write_Reg(NRF24L01_WRITE_REG+STATUS,sta);
+  if(sta&MAX_TX)
+  {
+    NRF24L01_Write_Reg(NRF24L01_FLUSH_TX,0xff);
+    return MAX_TX;
+  }
+  if(sta&TX_OK)
+  {
+    return TX_OK;
+  }
+  return 0xff;
+}
+
+/*返回值为1，接收完成；否则错误*/
+u8 NRF24L01_RxPacket(u8 *rxbuf)
+	{
+	u8 sta;		    							   
+	sta=NRF24L01_Read_Reg(STATUS);      	 
+	NRF24L01_Write_Reg(NRF24L01_WRITE_REG+STATUS,sta); 
+	if(sta&RX_OK)
+		{
+		NRF24L01_Read_Buf(NRF24L01_RD_RX_PLOAD,rxbuf,RX_PLOAD_WIDTH);
+		NRF24L01_Write_Reg(NRF24L01_FLUSH_RX,0xff);
+		return 0; 
+		}	   
+	return 1;          
+	}
+
+void RX_Mode(void)
+	{
+	Clr_NRF24L01_CE;	  
+	NRF24L01_Write_Buf(NRF24L01_WRITE_REG+RX_ADDR_P0,(u8*)RX_ADDRESS,RX_ADR_WIDTH);//写RX节点地址	
+  NRF24L01_Write_Reg(NRF24L01_WRITE_REG+EN_AA,0x01);    //ENABLE CHANNEL_0 auto-ack   
+	NRF24L01_Write_Reg(NRF24L01_WRITE_REG+EN_RXADDR,0x01);//ENABLE CHANNEL_0 received address	 
+	NRF24L01_Write_Reg(NRF24L01_WRITE_REG+RF_CH,40);	     //设置RF通信频率	  
+	NRF24L01_Write_Reg(NRF24L01_WRITE_REG+RX_PW_P0,RX_PLOAD_WIDTH);//Select channel_0 avaliable datawidth	    
+	NRF24L01_Write_Reg(NRF24L01_WRITE_REG+RF_SETUP,0x0f);//set TX    
+	NRF24L01_Write_Reg(NRF24L01_WRITE_REG+CONFIG, 0x0f);//set working mode
+	Set_NRF24L01_CE; //CE = 1 , enter receive mode
+	}
+
+void TX_Mode(void)
+	{														 
+	Clr_NRF24L01_CE;	    
+	NRF24L01_Write_Buf(NRF24L01_WRITE_REG+TX_ADDR,(u8*)TX_ADDRESS,TX_ADR_WIDTH);//写tx节点地址	
+  NRF24L01_Write_Buf(NRF24L01_WRITE_REG+RX_ADDR_P0,(u8*)RX_ADDRESS,RX_ADR_WIDTH); //设置Tx节点地址	  
+	
+	NRF24L01_Write_Reg(NRF24L01_WRITE_REG+EN_AA,0x01);     //ENABLE CHANNEL_0 AUTO_ACK   
+	NRF24L01_Write_Reg(NRF24L01_WRITE_REG+EN_RXADDR,0x01); //ENABLE CHANNEL_0 RECEIVE ADDRESS  
+	NRF24L01_Write_Reg(NRF24L01_WRITE_REG+SETUP_RETR,0x1a);//CONFIG AUTO RE-TX DELAY
+	NRF24L01_Write_Reg(NRF24L01_WRITE_REG+RF_CH,40);       //CONFIG RF CHANNEL
+	NRF24L01_Write_Reg(NRF24L01_WRITE_REG+RF_SETUP,0x0f);  //CONFIG TX    
+	NRF24L01_Write_Reg(NRF24L01_WRITE_REG+CONFIG,0x0e);    //working mode
+	Set_NRF24L01_CE;//CE = 1 for 10us , START Tx
+	}