void radio()
    {
       
       int mode = digitalRead(42);
      if (mode==LOW)  
     { 
     do {} while (!(nrf24l01p_get_irq_flags() & (1 << NRF24L01P_IRQ_RX_DR)));
       //do {} while ((1 << NRF24L01P_IRQ_RX_DR));
      nrf24l01p_clear_irq_flag(NRF24L01P_IRQ_RX_DR);
      nrf24l01p_read_rx_payload((uint8_t*)payload);//, sizeof(payload));
      rad=1;
     }
     else
     {
     rad=0;
     } 
    }
//*****************************************************************
void peredat()
{
  digitalWrite(45, LOW);//+5v nrf
    delay (100);
    data() ;
     digitalWrite(45, HIGH);//+5v nrf
    delay (100);
    digitalWrite(NRF_CE_PIN, LOW); 
       uint8_t address[5] = { 0xE2, 0xE4, 0x23, 0xE4, 0x02 };
    nrf_init(address);
    static uint8_t payload1[NRF_PAYLOAD_LENGTH];
      strcpy((char*)payload1, test_data);
      nrf24l01p_write_tx_payload(payload1, sizeof(payload1));
          digitalWrite(NRF_CE_PIN, HIGH);
      delay(1);
      digitalWrite(NRF_CE_PIN, LOW);

      do {} while (!(nrf24l01p_get_irq_flags() & (1 << NRF24L01P_IRQ_TX_DS)));
      nrf24l01p_clear_irq_flag(NRF24L01P_IRQ_TX_DS);
}
//*******************************************************************


    void nrf_init(uint8_t *address)
    {
        delay(100);

        nrf24l01p_get_clear_irq_flags();
        nrf24l01p_close_pipe(NRF24L01P_ALL);
        nrf24l01p_open_pipe(NRF24L01P_PIPE0, false);
        nrf24l01p_set_crc_mode(NRF24L01P_CRC_16BIT);
        nrf24l01p_set_address_width(NRF24L01P_AW_5BYTES);
        nrf24l01p_set_address(NRF24L01P_PIPE0, address);
        nrf24l01p_set_operation_mode(NRF24L01P_PRX);
        nrf24l01p_set_rx_payload_width(NRF24L01P_PIPE0, NRF_PAYLOAD_LENGTH);
        nrf24l01p_set_rf_channel(NRF_CHANNEL);
        nrf24l01p_set_power_mode(NRF24L01P_PWR_UP);
        delay(NRF_POWER_UP_DELAY);
    }

    void nrf24l01p_spi_ss(nrf24l01p_spi_ss_level_t level)
        {
             digitalWrite(SPI_SS_PIN, (level == NRF24L01P_SPI_SS_LOW ? LOW : HIGH));
        }

    uint8_t nrf24l01p_spi_rw(uint8_t value)
         {
           return SPI.transfer(value);
         }