// Sends a data package to the default address. Be sure to send the correct
// amount of bytes as configured as payload on the receiver.
void nrf24_send(uint8_t* value)
{
/* Go to Standby-I first */
nrf24_ce_digitalWrite(LOW);
/* Set to transmitter mode , Power up if needed */
nrf24_powerUpTx();
/* Do we really need to flush TX fifo each time ? */
#if 1
/* Pull down chip select */
nrf24_csn_digitalWrite(LOW);
/* Write cmd to flush transmit FIFO */
spi_transfer(FLUSH_TX);
/* Pull up chip select */
nrf24_csn_digitalWrite(HIGH);
#endif
/* Pull down chip select */
nrf24_csn_digitalWrite(LOW);
/* Write cmd to write payload */
spi_transfer(W_TX_PAYLOAD);
/* Write payload */
nrf24_transmitSync(value,payload_len);
/* Pull up chip select */
nrf24_csn_digitalWrite(HIGH);
/* Start the transmission */
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);
}
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);
}
uint8_t nrf24_initialize()
{
nrf24_setupPins();
nrf24_ce_digitalWrite(LOW);
nrf24_csn_digitalWrite(HIGH);
nrf24_config(0, 32);
return NRF24_OK;
}
/* 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
}
void nrf24_powerDown()
{
uint8_t value;
nrf24_ce_digitalWrite(LOW);
// put the radio in power down mode
spi_getRegister(CONFIG, &value);
value &= ~(1 << PWR_UP);
spi_setRegister(CONFIG, value);
}
uint8_t nrf24_startListening()
{
if (context.isTxMode != 0) return NRF24ERR_INVALID_MODE;
if (context.isRxMode != 0) return NRF24_OK;
// flush the RX queue
nrf24_csn_digitalWrite(LOW);
spi_transfer(FLUSH_RX);
nrf24_csn_digitalWrite(HIGH);
// clear the RX_DR, TX_DS and MAX_RT flags
spi_setRegister(STATUS,(1<<RX_DR)|(1<<TX_DS)|(1<<MAX_RT));
// power up the radio in RX mode
nrf24_ce_digitalWrite(LOW);
spi_setRegister(CONFIG, (1 << PWR_UP) | (1 << PRIM_RX) );
nrf24_ce_digitalWrite(HIGH);
context.isRxMode = TRUE;
printf("Radio is listening\n");
return NRF24_OK;
}
uint8_t nrf24_stopListening()
{
if (context.isRxMode == 0) return NRF24ERR_INVALID_MODE;
// put the radio in standby-I
nrf24_ce_digitalWrite(LOW);
context.isRxMode = FALSE;
printf("Radio is not listening\n");
return NRF24_OK;
}
uint8_t nrf24_startTransmission()
{
if (context.isRxMode != 0) return NRF24ERR_INVALID_MODE;
if (context.isTxMode != 0) return NRF24_OK;
// flush the RX queue
nrf24_csn_digitalWrite(LOW);
spi_transfer(FLUSH_RX);
nrf24_csn_digitalWrite(HIGH);
// clear the RX_DR, TX_DS and MAX_RT flags
spi_setRegister(STATUS,(1<<RX_DR)|(1<<TX_DS)|(1<<MAX_RT));
// power up the radio in TX mode (or standby-II if TX FIFO is empty)
nrf24_ce_digitalWrite(LOW);
spi_setRegister(CONFIG, (1 << PWR_UP) | (0 << PRIM_RX) );
nrf24_ce_digitalWrite(HIGH);
context.isTxMode = TRUE;
printf("Radio is ready to transmit\n");
return NRF24_OK;
}
/* init the hardware pins */
void nrf24_init()
{
// nrf24_setupPins();
nrf24_ce_digitalWrite(LOW);
nrf24_csn_digitalWrite(HIGH);
DDRB |= (1<<PINB0);
DDRD |= (1<<PIND7);
PORTB &= ~(1<<PINB0);
PORTD |= (1<<PIND7);
}
void nrf24_test_sender()
{
int temp;
data_array[0] = 0x00;
data_array[1] = 0xAA;
data_array[2] = 0x55;
data_array[3] = 0x00;
nrf24_ce_digitalWrite(LOW);
/* Set to transmitter mode , Power up if needed */
nrf24_powerUpTx();
/* Do we really need to flush TX fifo each time ? */
#if 1
/* Pull down chip select */
nrf24_csn_digitalWrite(LOW);
/* Write cmd to flush transmit FIFO */
spi_transfer(FLUSH_TX);
/* Pull up chip select */
nrf24_csn_digitalWrite(HIGH);
#endif
/* Pull down chip select */
nrf24_csn_digitalWrite(LOW);
/* Write cmd to write payload */
spi_transfer(W_TX_PAYLOAD);
/* Write payload */
nrf24_transmitSync(data_array, 30);
/* Pull up chip select */
nrf24_csn_digitalWrite(HIGH);
/* Start the transmission */
nrf24_ce_digitalWrite(HIGH);
/* Wait for transmission to end */
}
uint8_t nrf24_stopTransmission()
{
if (context.isTxMode == 0) return NRF24ERR_INVALID_MODE;
// change back the RX address for pipe 0
spi_writeRegister(RX_ADDR_P0, (uint8_t*)&context.firstPipeAddress, sizeof(uint32_t));
// put the radio in standby-I
nrf24_ce_digitalWrite(LOW);
context.isTxMode = FALSE;
printf("Radio is not ready to transmit\n");
return NRF24_OK;
}
/* init the hardware pins */
void nrf24_init()
{
nrf24_setupPins();
nrf24_ce_digitalWrite(LOW);
nrf24_csn_digitalWrite(HIGH);
#if defined (__AVR_ATmega328P__)
/* Set SS pin output */
DDRB |= (1<<2);
/* Set SPI peripheral @Fosc/2 */
SPCR = (1<<SPE)|(1<<MSTR);
SPSR |= (1<<SPI2X);
#endif
}
void nrf24_powerDown()
{
nrf24_ce_digitalWrite(LOW);
nrf24_configRegister(CONFIG,nrf24_CONFIG);
}
/* init the hardware pins */
void nrf24_init()
{
//SPIM_Funk_Start();
nrf24_ce_digitalWrite(LOW);
nrf24_csn_digitalWrite(HIGH);
}
void nrf24_standby()
{
nrf24_ce_digitalWrite(LOW);
spi_setRegister(CONFIG, spi_getRegister(CONFIG, 0) | (1 << PWR_UP) );
}
/* init the hardware pins */
void nrf24_init()
{
nrf24_ce_digitalWrite(LOW);
nrf24_csn_digitalWrite(HIGH);
}
void nrf24_send(const void *value, unsigned short payload_len)
{
//This is supposed to be modularisd and call prepare and transmit but for now we just do
//everythung here
/* Go to Standby-I first */
int i=0;
length_arr=payload_len;
//payload_len=23;
//nrf24_test_sender();
//return;
for(i=0;i<127;i++)
{
data[i]=0;
}
for(i=0;i<payload_len;i++)
{
data[i]=((uint8_t *)value)[i];
}
nrf24_ce_digitalWrite(LOW);
/* Set to transmitter mode , Power up if needed */
nrf24_powerUpTx();
/* Do we really need to flush TX fifo each time ? */
#if 1
/* Pull down chip select */
nrf24_csn_digitalWrite(LOW);
/* Write cmd to flush transmit FIFO */
spi_transfer(FLUSH_TX);
/* Pull up chip select */
nrf24_csn_digitalWrite(HIGH);
#endif
/* Pull down chip select */
nrf24_csn_digitalWrite(LOW);
/* Write cmd to write payload */
spi_transfer(W_TX_PAYLOAD);
/* Write payload */
nrf24_transmitSync(value,payload_len);
/* Pull up chip select */
nrf24_csn_digitalWrite(HIGH);
/* Start the transmission */
nrf24_ce_digitalWrite(HIGH);
//while(true);
//while(1);
//while(1);
while(nrf24_isSending());
//nrf24_powerUpRx();
}
/* Set the RX address */
void nrf24_rx_address(uint8_t * adr)
{
nrf24_ce_digitalWrite(LOW);
nrf24_writeRegister(RX_ADDR_P1,adr,nrf24_ADDR_LEN);
nrf24_ce_digitalWrite(HIGH);
}
void nrf24_powerDown()
{
nrf24_ce_digitalWrite(LOW);
nrf24_configRegister(NRF24L01P_REG_CONFIG,NRF_INIT);
}
