void nrf24_powerUpRx()
{
nrf24_csn_digitalWrite(LOW);
spi_transfer(NRF24L01P_CMD_FLUSH_RX, 1);
nrf24_csn_digitalWrite(HIGH);
nrf24_configRegister(NRF24L01P_REG_STATUS,(1<<NRF24L01P_SHIFT_RX_DR)|(1<<NRF24L01P_SHIFT_TX_DS)|(1<<NRF24L01P_SHIFT_MAX_RT));
nrf24_ce_digitalWrite(LOW);
nrf24_configRegister(NRF24L01P_REG_CONFIG,NRF_INIT|((1<<NRF24L01P_SHIFT_PWR_UP)|(1<<NRF24L01P_SHIFT_PRIM_RX)));
nrf24_ce_digitalWrite(HIGH);
}
void nrf24_powerUpRx()
{
nrf24_csn_digitalWrite(LOW);
spi_transfer(FLUSH_RX);
nrf24_csn_digitalWrite(HIGH);
nrf24_configRegister(STATUS,(1<<RX_DR)|(1<<TX_DS)|(1<<MAX_RT));
nrf24_ce_digitalWrite(LOW);
nrf24_configRegister(CONFIG,nrf24_CONFIG|((1<<PWR_UP)|(1<<PRIM_RX)));
nrf24_ce_digitalWrite(HIGH);
}
/* init the hardware pins */
void nrf24_init()
{
nrf24_setupPins();
nrf24_ce_digitalWrite(LOW);
nrf24_csn_digitalWrite(HIGH);
nrf24_ce_digitalWrite(HIGH);
nrf24_config(2,32);
//nrf24_readRegister(CONFIG,&tx1,1);
//tx1=0;
//nrf24_configRegister(RF_CH,2);
//nrf24_readRegister(EN_AA,&tx1,1);
//tx1=0;
nrf24_configRegister(RF_CH,2);
nrf24_readRegister(RF_CH,&tx1,1);
tx1=0;
nrf24_readRegister(CONFIG,&tx1,1);
tx1=0;
nrf24_readRegister(RX_ADDR_P0,&readData,5);
tx1=0;
nrf24_readRegister(RF_SETUP,&tx1,1);
tx1=0;
nrf24_readRegister(TX_ADDR,&readData,5);
tx1=0;
nrf24_configRegister(SETUP_AW,2);
//nrf24_readRegister(SETUP_AW,&tx1,1);
//nrf24_configRegister(DYNPD,0x00);
//nrf24_configRegister(FEATURE,0x00);
//nrf24_tx_address(&tx_address11);
//copy_paste();
// nrf_cmd(0x20, 0x12); //on, no crc, int on RX/TX done
// nrf_cmd(0x21, 0x00); //no auto-acknowledge
// nrf_cmd(0x22, 0x00); //no RX
// nrf_cmd(0x23, 0x02); //5-byte address
// nrf_cmd(0x24, 0x00); //no auto-retransmit
// nrf_cmd(0x26, 0x06); //1MBps at 0dBm
// nrf_cmd(0x27, 0x3E); //clear various flags
// nrf_cmd(0x3C, 0x00); //no dynamic payloads
// nrf_cmd(0x3D, 0x00); //no features
// nrf_cmd(0x31, 32); //always RX 32 bytes
// nrf_cmd(0x22, 0x01); //RX on pipe 0
}
/* Reads payload bytes into data array */
void nrf24_getData(uint8_t* data)
{
/* Pull down chip select */
nrf24_csn_digitalWrite(LOW);
/* Send cmd to read rx payload */
spi_transfer( R_RX_PAYLOAD );
/* Read payload */
nrf24_transferSync(data,data,payload_len);
/* Pull up chip select */
nrf24_csn_digitalWrite(HIGH);
/* Reset status register */
nrf24_configRegister(STATUS,(1<<RX_DR));
}
/* configure the module */
void nrf24_config(uint8_t channel, uint8_t pay_length)
{
/* Use static payload length ... */
payload_len = pay_length;
// Set RF channel
nrf24_configRegister(RF_CH,channel);
// Set length of incoming payload
nrf24_configRegister(RX_PW_P0, 0x00); // Auto-ACK pipe ...
nrf24_configRegister(RX_PW_P1, payload_len); // Data payload pipe
nrf24_configRegister(RX_PW_P2, 0x00); // Pipe not used
nrf24_configRegister(RX_PW_P3, 0x00); // Pipe not used
nrf24_configRegister(RX_PW_P4, 0x00); // Pipe not used
nrf24_configRegister(RX_PW_P5, 0x00); // Pipe not used
// 250 kbps, TX gain: 0dbm
nrf24_configRegister(RF_SETUP, (0<<RF_DR_HIGH)|((1<<RF_DR_LOW)|(0x03)<<RF_PWR));
// CRC enable, 1 byte CRC length
nrf24_configRegister(CONFIG,nrf24_CONFIG);
// Auto Acknowledgment
nrf24_configRegister(EN_AA,(1<<ENAA_P0)|(1<<ENAA_P1)|(0<<ENAA_P2)|(0<<ENAA_P3)|(0<<ENAA_P4)|(0<<ENAA_P5));
// Enable RX addresses
nrf24_configRegister(EN_RXADDR,(1<<ERX_P0)|(1<<ERX_P1)|(0<<ERX_P2)|(0<<ERX_P3)|(0<<ERX_P4)|(0<<ERX_P5));
// Auto retransmit delay: 1000 us and Up to 15 retransmit trials
nrf24_configRegister(SETUP_RETR,(0x04<<ARD)|(0x0F<<ARC));
// Dynamic length configurations: No dynamic length
nrf24_configRegister(DYNPD,(0<<DPL_P0)|(0<<DPL_P1)|(0<<DPL_P2)|(0<<DPL_P3)|(0<<DPL_P4)|(0<<DPL_P5));
// Start listening
nrf24_powerUpRx();
}
void nrf24_powerDown()
{
nrf24_ce_digitalWrite(LOW);
nrf24_configRegister(CONFIG,nrf24_CONFIG);
}
void nrf24_powerUpTx()
{
nrf24_configRegister(STATUS,(1<<RX_DR)|(1<<TX_DS)|(1<<MAX_RT));
nrf24_configRegister(CONFIG,nrf24_CONFIG|((1<<PWR_UP)|(0<<PRIM_RX)));
}
/* configure the module */
void nrf24_config(uint8_t channel, uint8_t pay_length)
{
/* Use static payload length ... */
payload_len = pay_length;
//nrf24_activate_special();
// Set RF channel
nrf24_configRegister(RF_CH,channel);
// Set length of incoming payload
nrf24_configRegister(RX_PW_P0, 32); // Auto-ACK pipe ...
nrf24_configRegister(RX_PW_P1, 0x00); // Data payload pipe
nrf24_configRegister(RX_PW_P2, 0x00); // Pipe not used
nrf24_configRegister(RX_PW_P3, 0x00); // Pipe not used
nrf24_configRegister(RX_PW_P4, 0x00); // Pipe not used
nrf24_configRegister(RX_PW_P5, 0x00); // Pipe not used
// 1 Mbps, TX gain: 0dbm
nrf24_configRegister(RF_SETUP, 0x07);
// CRC enable, 1 byte CRC length
nrf24_configRegister(CONFIG,0x06);
// Auto Acknowledgment
nrf24_configRegister(EN_AA,0x00);
// Enable RX addresses
nrf24_configRegister(EN_RXADDR,(1<<ERX_P0)|(0<<ERX_P1)|(0<<ERX_P2)|(0<<ERX_P3)|(0<<ERX_P4)|(0<<ERX_P5));
// Auto retransmit delay: 1000 us and Up to 15 retransmit trials
nrf24_configRegister(SETUP_RETR,(0<<ARD)|(0<<ARC));
nrf24_configRegister(SETUP_AW,2);
// Dynamic length configurations: No dynamic length
// Start listening
//nrf24_configRegister(FEATURE,1<<EN_DPL);
//nrf24_configRegister(DYNPD,(1<<DPL_P0)|(1<<DPL_P1)|(0<<DPL_P2)|(0<<DPL_P3)|(0<<DPL_P4)|(0<<DPL_P5));
//nrf24_powerUpRx();
}
/* configure the module */
void nrf24_config(uint8_t channel)
{
/* Use static payload length ... */
// payload_len = pay_length;
// Set RF channel
nrf24_configRegister(NRF24L01P_REG_RF_CH, (channel << NRF24L01P_SHIFT_RF_CH) & NRF24L01P_MASK_RF_CH);
// Set length of incoming payload
nrf24_configRegister(NRF24L01P_REG_RX_PW_P0, 0x00); // Auto-ACK pipe ...
nrf24_configRegister(NRF24L01P_REG_RX_PW_P1, payload_len); // Data payload pipe
nrf24_configRegister(NRF24L01P_REG_RX_PW_P2, 0x00); // Pipe not used
nrf24_configRegister(NRF24L01P_REG_RX_PW_P3, 0x00); // Pipe not used
nrf24_configRegister(NRF24L01P_REG_RX_PW_P4, 0x00); // Pipe not used
nrf24_configRegister(NRF24L01P_REG_RX_PW_P5, 0x00); // Pipe not used
// 1 Mbps, TX gain: 0dbm
nrf24_configRegister(NRF24L01P_REG_RF_SETUP, (0<<NRF24L01P_SHIFT_RF_DR_HIGH)|((0x03)<<NRF24L01P_SHIFT_RF_PWR)); //0x6
// CRC enable, 1 byte CRC length
nrf24_configRegister(NRF24L01P_REG_CONFIG,NRF_INIT);
// Auto Acknowledgment
nrf24_configRegister(NRF24L01P_REG_EN_AA,(1<<NRF24L01P_SHIFT_ENAA_P0)|(1<<NRF24L01P_SHIFT_ENAA_P1)|(0<<NRF24L01P_SHIFT_ENAA_P2)|(0<<NRF24L01P_SHIFT_ENAA_P3)|(0<<NRF24L01P_SHIFT_ENAA_P4)|(0<<NRF24L01P_SHIFT_ENAA_P5));
// Enable RX addresses
nrf24_configRegister(NRF24L01P_REG_EN_RXADDR,(1<<NRF24L01P_SHIFT_ERX_P0)|(1<<NRF24L01P_SHIFT_ERX_P1)|(0<<NRF24L01P_SHIFT_ERX_P2)|(0<<NRF24L01P_SHIFT_ERX_P3)|(0<<NRF24L01P_SHIFT_ERX_P4)|(0<<NRF24L01P_SHIFT_ERX_P5));
// Auto retransmit delay: 1000 us and Up to 15 retransmit trials
nrf24_configRegister(NRF24L01P_REG_SETUP_RETR,(0x04<<NRF24L01P_SHIFT_ARD)|(0x0F<<NRF24L01P_SHIFT_ARC));
// Dynamic length configurations: No dynamic length
nrf24_configRegister(NRF24L01P_REG_DYNPD,(0<<NRF24L01P_SHIFT_DPL_P0)|(0<<NRF24L01P_SHIFT_DPL_P1)|(0<<NRF24L01P_SHIFT_DPL_P2)|(0<<NRF24L01P_SHIFT_DPL_P3)|(0<<NRF24L01P_SHIFT_DPL_P4)|(0<<NRF24L01P_SHIFT_DPL_P5));
// Start listening
nrf24_powerUpRx();
}
void nrf24_powerDown()
{
nrf24_ce_digitalWrite(LOW);
nrf24_configRegister(NRF24L01P_REG_CONFIG,NRF_INIT);
}
void nrf24_powerUpTx()
{
nrf24_configRegister(NRF24L01P_REG_STATUS,(1<<NRF24L01P_SHIFT_RX_DR)|(1<<NRF24L01P_SHIFT_TX_DS)|(1<<NRF24L01P_SHIFT_MAX_RT)); //0x27, 0x70
nrf24_configRegister(NRF24L01P_REG_CONFIG,NRF_INIT|((1<<NRF24L01P_SHIFT_PWR_UP)|(0<<NRF24L01P_SHIFT_PRIM_RX))); //0x20, 0x0a
}
void nrf24_set_channel(uint8_t channel)
{
nrf24_configRegister(NRF24L01P_REG_RF_CH, (channel << NRF24L01P_SHIFT_RF_CH) & NRF24L01P_MASK_RF_CH);
}
