为什么我的nrf24l01只能上电后接收一次！！！！！！！！！！！代码如下

nrf24l01 · 发表于 2016-3-22 10:19:10

int main(void)
{
u8 key,mode;
u16 t=0;
u8 tmp_buf[8];
  //u8 tmp_buf1[3];
delay_init();    //ÑÓÊ±º¯Êý³õÊ¼»¯
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//ÉèÖÃÖÐ¶ÏÓÅÏÈ¼¶·Ö×éÎª×é2£º2Î»ÇÀÕ¼ÓÅÏÈ¼¶£¬2Î»ÏìÓ¦ÓÅÏÈ¼¶
uart_init(115200); //´®¿Ú³õÊ¼»¯Îª115200
  LED_Init();    //³õÊ¼»¯ÓëLEDÁ¬½ÓµÄÓ²¼þ½Ó¿Ú
KEY_Init();    //³õÊ¼»¯°´¼ü
LCD_Init();       //³õÊ¼»¯LCD
NRF24L01_Init();    //³õÊ¼»¯NRF24L01
  POINT_COLOR=RED; //ÉèÖÃ×ÖÌåÎªºìÉ«
while(NRF24L01_Check())
{
  LCD_ShowString(30,130,200,16,16,"NRF24L01 Error");
  delay_ms(200);
  LCD_Fill(30,130,239,130+16,WHITE);
delay_ms(200);
}
LCD_ShowString(30,130,200,16,16,"NRF24L01 OK");


while(1)
  {
NRF24L01_RX_Mode();
if(NRF24L01_RxPacket(tmp_buf)==0)
  {
LCD_Clear(WHITE);
LCD_ShowString(30,200,200,24,24,tmp_buf);
delay_ms(3000);

  }

  }

const u8 TX_ADDRESS[TX_ADR_WIDTH]={0x34,0x43,0x10,0x10,0x01}; //·¢ËÍµØÖ·
const u8 RX_ADDRESS[RX_ADR_WIDTH]={0x34,0x43,0x10,0x10,0x01};
//³õÊ¼»¯24L01µÄIO¿Ú
void NRF24L01_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
  SPI_InitTypeDef  SPI_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOG, ENABLE);  //Ê¹Ä&Uuml

B,G¶Ë¿ÚÊ±ÖÓ


GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;    //PB12ÉÏÀ  ·ÀÖ¹W25XµÄ¸ÉÈÅ
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //ÍÆÍìÊä³ö
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOB, &GPIO_InitStructure); //³õÊ¼»¯Ö¸¶¨IO
  GPIO_SetBits(GPIOB,GPIO_Pin_12);//ÉÏÀ

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7|GPIO_Pin_8; //PG8 7 ÍÆÍì
  GPIO_Init(GPIOG, &GPIO_InitStructure);//³õÊ¼»¯Ö¸¶¨IO

GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; //PG6 ÊäÈë
GPIO_Init(GPIOG, &GPIO_InitStructure);
GPIO_ResetBits(GPIOG,GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8);//PG6,7,8ÉÏÀ

  SPI2_Init();    //³õÊ¼»¯SPI

SPI_Cmd(SPI2, DISABLE); // SPIÍâÉè²»Ê¹ÄÜ
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;  //SPIÉèÖÃÎªË«ÏßË«ÏòÈ«Ë«¹¤
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;  //SPIÖ÷»ú
  SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;  //·¢ËÍ½ÓÊÕ8Î»Ö¡½á¹¹
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;  //Ê±ÖÓÐü¿ÕµÍ
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; //Êý¾Ý²¶»ñÓÚµÚ1¸öÊ±ÖÓÑØ
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;  //NSSÐÅºÅÓÉÈí¼þ¿ØÖÆ
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_16;  //¶¨Òå²¨ÌØÂÊÔ¤·ÖÆµµÄÖµ:²¨ÌØÂÊÔ¤·ÖÆµÖµÎª16
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //Êý¾Ý´«Êä´ÓMSBÎ»¿ªÊ¼
SPI_InitStructure.SPI_CRCPolynomial = 7; //CRCÖµ¼ÆËãµÄ¶àÏîÊ½
SPI_Init(SPI2, &SPI_InitStructure);  //¸ù¾ÝSPI_InitStructÖÐÖ¸¶¨µÄ²ÎÊý³õÊ¼»¯ÍâÉèSPIx¼Ä´æÆ÷

SPI_Cmd(SPI2, ENABLE); //Ê¹ÄÜSPIÍâÉè

NRF24L01_CE=0; //Ê¹ÄÜ24L01
NRF24L01_CSN=1; //SPIÆ¬Ñ¡È¡Ïû

}
//¼ì²â24L01ÊÇ·ñ´æÔÚ
//·µ»ØÖµ:0£¬³É¹¦;1£¬Ê§°Ü
u8 NRF24L01_Check(void)
{
u8 buf[5]={0XA5,0XA5,0XA5,0XA5,0XA5};
u8 i;
SPI2_SetSpeed(SPI_BaudRatePrescaler_4); //spiËÙ¶ÈÎª9Mhz£¨24L01µÄ×î´óSPIÊ±ÖÓÎª10Mhz£©
NRF24L01_Write_Buf(NRF_WRITE_REG+TX_ADDR,buf,5);//Ð´Èë5¸ö×Ö½ÚµÄµØÖ·.
NRF24L01_Read_Buf(TX_ADDR,buf,5); //¶Á³öÐ´ÈëµÄµØÖ·
for(i=0;i<5;i++)if(buf[i]!=0XA5)break;
if(i!=5)return 1;//¼ì²â24L01´íÎó
return 0; //¼ì²âµ½24L01
}
//SPIÐ´¼Ä´æÆ÷
//reg:Ö¸¶¨¼Ä´æÆ÷µØÖ·
//value:Ð´ÈëµÄÖµ
u8 NRF24L01_Write_Reg(u8 reg,u8 value)
{
u8 status;
NRF24L01_CSN=0;                //Ê¹ÄÜSPI´«Êä
status =SPI2_ReadWriteByte(reg);//·¢ËÍ¼Ä´æÆ÷ºÅ
SPI2_ReadWriteByte(value);    //Ð´Èë¼Ä´æÆ÷µÄÖµ
NRF24L01_CSN=1;                //½ûÖ¹SPI´«Êä
return(status);       //·µ»Ø×´Ì¬Öµ
}
//¶ÁÈ¡SPI¼Ä´æÆ÷Öµ
//reg:Òª¶ÁµÄ¼Ä´æÆ÷
u8 NRF24L01_Read_Reg(u8 reg)
{
u8 reg_val;
NRF24L01_CSN = 0;       //Ê¹ÄÜSPI´«Êä
SPI2_ReadWriteByte(reg); //·¢ËÍ¼Ä´æÆ÷ºÅ
reg_val=SPI2_ReadWriteByte(0XFF);//¶ÁÈ¡¼Ä´æÆ÷ÄÚÈÝ
NRF24L01_CSN = 1;       //½ûÖ¹SPI´«Êä
return(reg_val);          //·µ»Ø×´Ì¬Öµ
}
//ÔÚÖ¸¶¨Î»ÖÃ¶Á³öÖ¸¶¨³¤¶ÈµÄÊý¾Ý
//reg:¼Ä´æÆ÷(Î»ÖÃ)
//*pBuf:Êý¾ÝÖ¸Õë
//len:Êý¾Ý³¤¶È
//·µ»ØÖµ,´Ë´Î¶Áµ½µÄ×´Ì¬¼Ä´æÆ÷Öµ
u8 NRF24L01_Read_Buf(u8 reg,u8 *pBuf,u8 len)
{
u8 status,u8_ctr;
NRF24L01_CSN = 0;          //Ê¹ÄÜSPI´«Êä
status=SPI2_ReadWriteByte(reg);//·¢ËÍ¼Ä´æÆ÷Öµ(Î»ÖÃ),²¢¶ÁÈ¡×´Ì¬Öµ
  for(u8_ctr=0;u8_ctr<len;u8_ctr++)pBuf[u8_ctr]=SPI2_ReadWriteByte(0XFF);//¶Á³öÊý¾Ý
NRF24L01_CSN=1;    //¹Ø±ÕSPI´«Êä
return status;       //·µ»Ø¶Áµ½µÄ×´Ì¬Öµ
}
//ÔÚÖ¸¶¨Î»ÖÃÐ´Ö¸¶¨³¤¶ÈµÄÊý¾Ý
//reg:¼Ä´æÆ÷(Î»ÖÃ)
//*pBuf:Êý¾ÝÖ¸Õë
//len:Êý¾Ý³¤¶È
//·µ»ØÖµ,´Ë´Î¶Áµ½µÄ×´Ì¬¼Ä´æÆ÷Öµ
u8 NRF24L01_Write_Buf(u8 reg, u8 *pBuf, u8 len)
{
u8 status,u8_ctr;
  NRF24L01_CSN = 0;       //Ê¹ÄÜSPI´«Êä
status = SPI2_ReadWriteByte(reg);//·¢ËÍ¼Ä´æÆ÷Öµ(Î»ÖÃ),²¢¶ÁÈ¡×´Ì¬Öµ
for(u8_ctr=0; u8_ctr<len; u8_ctr++)SPI2_ReadWriteByte(*pBuf++); //Ð´ÈëÊý¾Ý
NRF24L01_CSN = 1;    //¹Ø±ÕSPI´«Êä
return status;       //·µ»Ø¶Áµ½µÄ×´Ì¬Öµ
}
//Æô¶¯NRF24L01·¢ËÍÒ»´ÎÊý¾Ý
//txbuf:´ý·¢ËÍÊý¾ÝÊ×µØÖ·
//·µ»ØÖµ:·¢ËÍÍê³É×´¿ö
u8 NRF24L01_TxPacket(u8 *txbuf)
{
u8 sta;
  SPI2_SetSpeed(SPI_BaudRatePrescaler_8);//spiËÙ¶ÈÎª9Mhz£¨24L01µÄ×î´óSPIÊ±ÖÓÎª10Mhz£©
NRF24L01_CE=0;
NRF24L01_Write_Buf(WR_TX_PLOAD,txbuf,TX_PLOAD_WIDTH);//Ð´Êý¾Ýµ½TX BUF  32¸ö×Ö½Ú
  NRF24L01_CE=1;//Æô¶¯·¢ËÍ
while(NRF24L01_IRQ!=0);//µÈ´ý·¢ËÍÍê³É
sta=NRF24L01_Read_Reg(STATUS);  //¶ÁÈ¡×´Ì¬¼Ä´æÆ÷µÄÖµ
NRF24L01_Write_Reg(NRF_WRITE_REG+STATUS,sta); //Çå³ýTX_DS»òMAX_RTÖÐ¶Ï±êÖ¾
if(sta&MAX_TX)//´ïµ½×î´óÖØ·¢´ÎÊý
{
  NRF24L01_Write_Reg(FLUSH_TX,0xff);//Çå³ýTX FIFO¼Ä´æÆ÷
  return MAX_TX;
}
if(sta&TX_OK)//·¢ËÍÍê³É
{
  return TX_OK;
}
return 0xff;//ÆäËûÔ Òò·¢ËÍÊ§°Ü
}
//Æô¶¯NRF24L01·¢ËÍÒ»´ÎÊý¾Ý
//txbuf:´ý·¢ËÍÊý¾ÝÊ×µØÖ·
//·µ»ØÖµ:0£¬½ÓÊÕÍê³É£»ÆäËû£¬´íÎó´úÂë
u8 NRF24L01_RxPacket(u8 *rxbuf)
{
u8 sta;
SPI2_SetSpeed(SPI_BaudRatePrescaler_8); //spiËÙ¶ÈÎª9Mhz£¨24L01µÄ×î´óSPIÊ±ÖÓÎª10Mhz£©
sta=NRF24L01_Read_Reg(STATUS);  //¶ÁÈ¡×´Ì¬¼Ä´æÆ÷µÄÖµ
NRF24L01_Write_Reg(NRF_WRITE_REG+STATUS,sta); //Çå³ýTX_DS»òMAX_RTÖÐ¶Ï±êÖ¾
if(sta&RX_OK)//½ÓÊÕµ½Êý¾Ý
{

  NRF24L01_Read_Buf(RD_RX_PLOAD,rxbuf,RX_PLOAD_WIDTH);//¶ÁÈ¡Êý¾Ý
  NRF24L01_Write_Reg(FLUSH_RX,0xff);//Çå³ýRX FIFO¼Ä´æÆ÷ 0xff

  //NRFWriteReg(FLUSH_TX,0x00);
  //NRF24WriteReg(FLUSH_RX,0x00);
  return 0;
}
return 1;//Ã»ÊÕµ½ÈÎºÎÊý¾Ý
}
//¸Ãº¯Êý³õÊ¼»¯NRF24L01µ½RXÄ£Ê½
//ÉèÖÃRXµØÖ·,Ð´RXÊý¾Ý¿í¶È,Ñ¡ÔñRFÆµµÀ,²¨ÌØÂÊºÍLNA HCURR
//µ±CE±ä¸ßºó,¼´½øÈëRXÄ£Ê½,²¢¿ÉÒÔ½ÓÊÕÊý¾ÝÁË
void NRF24L01_RX_Mode(void)
{
NRF24L01_CE=0;
NRF24L01_Write_Buf(NRF_WRITE_REG+RX_ADDR_P0,(u8*)RX_ADDRESS,RX_ADR_WIDTH);//Ð´RX½ÚµãµØÖ·

NRF24L01_Write_Reg(NRF_WRITE_REG+EN_AA,0x01); //Ê¹ÄÜÍ¨µÀ0µÄ×Ô¶¯Ó¦´ð
NRF24L01_Write_Reg(NRF_WRITE_REG+EN_RXADDR,0x01);//Ê¹ÄÜÍ¨µÀ0µÄ½ÓÊÕµØÖ·
NRF24L01_Write_Reg(NRF_WRITE_REG+RF_CH,40);    //ÉèÖÃRFÍ¨ÐÅÆµÂÊ 40
NRF24L01_Write_Reg(NRF_WRITE_REG+RX_PW_P0,RX_PLOAD_WIDTH);//Ñ¡ÔñÍ¨µÀ0µÄÓÐÐ§Êý¾Ý¿í¶È
NRF24L01_Write_Reg(NRF_WRITE_REG+RF_SETUP,0x0f);//ÉèÖÃTX·¢Éä²ÎÊý,0dbÔöÒæ,2Mbps,µÍÔëÉùÔöÒæ¿ªÆô
NRF24L01_Write_Reg(NRF_WRITE_REG+CONFIG, 0x0f);//ÅäÖÃ»ù±¾¹¤×÷Ä£Ê½µÄ²ÎÊý

WR_UP,EN_CRC,16BIT_CRC,½ÓÊÕÄ£Ê½
NRF24L01_CE = 1; //CEÎª¸ß,½øÈë½ÓÊÕÄ£Ê½

}
//¸Ãº¯Êý³õÊ¼»¯NRF24L01µ½TXÄ£Ê½
//ÉèÖÃTXµØÖ·,Ð´TXÊý¾Ý¿í¶È,ÉèÖÃRX×Ô¶¯Ó¦´ðµÄµØÖ·,Ìî³äTX·¢ËÍÊý¾Ý,Ñ¡ÔñRFÆµµÀ,²¨ÌØÂÊºÍLNA HCURR
//PWR_UP,CRCÊ¹ÄÜ
//µ±CE±ä¸ßºó,¼´½øÈëRXÄ£Ê½,²¢¿ÉÒÔ½ÓÊÕÊý¾ÝÁË
//CEÎª¸ß´óÓÚ10us,ÔòÆô¶¯·¢ËÍ.
void NRF24L01_TX_Mode(void)
{
NRF24L01_CE=0;
NRF24L01_Write_Buf(NRF_WRITE_REG+TX_ADDR,(u8*)TX_ADDRESS,TX_ADR_WIDTH);//Ð´TX½ÚµãµØÖ·
NRF24L01_Write_Buf(NRF_WRITE_REG+RX_ADDR_P0,(u8*)RX_ADDRESS,RX_ADR_WIDTH); //ÉèÖÃTX½ÚµãµØÖ·,Ö÷ÒªÎªÁËÊ¹ÄÜACK
NRF24L01_Write_Reg(NRF_WRITE_REG+EN_AA,0x01);    //Ê¹ÄÜÍ¨µÀ0µÄ×Ô¶¯Ó¦´ð
NRF24L01_Write_Reg(NRF_WRITE_REG+EN_RXADDR,0x01); //Ê¹ÄÜÍ¨µÀ0µÄ½ÓÊÕµØÖ·
NRF24L01_Write_Reg(NRF_WRITE_REG+SETUP_RETR,0x1a);//ÉèÖÃ×Ô¶¯ÖØ·¢¼ä¸ôÊ±¼ä:500us + 86us;×î´ó×Ô¶¯ÖØ·¢´ÎÊý:10´Î
NRF24L01_Write_Reg(NRF_WRITE_REG+RF_CH,40);    //ÉèÖÃRFÍ¨µÀÎª40
NRF24L01_Write_Reg(NRF_WRITE_REG+RF_SETUP,0x0f);  //ÉèÖÃTX·¢Éä²ÎÊý,0dbÔöÒæ,2Mbps,µÍÔëÉùÔöÒæ¿ªÆô
NRF24L01_Write_Reg(NRF_WRITE_REG+CONFIG,0x0e); //ÅäÖÃ»ù±¾¹¤×÷Ä£Ê½µÄ²ÎÊý

WR_UP,EN_CRC,16BIT_CRC,½ÓÊÕÄ£Ê½,¿ªÆôËùÓÐÖÐ¶Ï
NRF24L01_CE=1;//CEÎª¸ß,10usºóÆô¶¯·¢ËÍ
}

}