extern void nRF24L01_interrupt ()
{
uint8_t status;
// If still in transmitting mode then finish transmission
PORTD ^= 1<<0; //toggle bit
if (PTX) {
// Read nRF24L01 status
nRF24L01_CSN_lo; // Pull down chip select
status = spi_transmit_byte(NOP); // Read status register
nRF24L01_CSN_hi; // Pull up chip select
nRF24L01_CSN_lo; // Pull down chip select
spi_transmit_byte( FLUSH_TX ); // Write cmd to flush tx fifo
nRF24L01_CSN_hi; // Pull up chip select
nRF24L01_CE_lo; // Deactivate transreceiver
RX_POWERUP; // Power up in receiving mode
nRF24L01_CE_hi; // Listening for pakets
PTX = 0; // Set to receiving mode
// Reset status register for further interaction
nRF24L01_config_register(STATUS,(1<<TX_DS)|(1<<MAX_RT)); // Reset status register
}
}
extern void nRF24L01_interrupt ()
{
// Read nRF24L01 status
uint8_t status;
nRF24L01_CSN_lo; // Pull down chip select
status = spi_transmit_byte(NOP); // Read status register
nRF24L01_CSN_hi; // Pull up chip select
//based upon the status register decide what to do
//if TX sucess
if ( status & (1<<TX_DS) )
{
nRF24L01_powerdown(); // Return to low power state
}
//maximum retrys reached
else if ( status & (1<<MAX_RT) )
{
//set some flag
nRF24L01_powerdown(); // Return to low power state
}
//recieved a packet
else if ( status & (1<<RX_DR) )
{
nRF24L01_get_data(buffer);
nRF24L01_powerdown();
}
// Reset status register for further interaction
nRF24L01_config_register(STATUS,( (1<<RX_DR) | (1<<TX_DS) | (1<<MAX_RT) ) ); // Reset status register
}
void nRF24L01_config()
// Sets the important registers in the nRF24L01 module and powers the module
// in receiving mode
{
// Set RF channel
nRF24L01_config_register(RF_CH,nRF24L01_CH);
// Set length of incoming payload
nRF24L01_config_register(RX_PW_P0, nRF24L01_PAYLOAD);
// Reset status register
nRF24L01_config_register(STATUS,((1<<TX_DS)|(1<<MAX_RT)));
// Start receiver
PTX = 0; // Start in receiving mode
RX_POWERUP; // Power up in receiving mode
nRF24L01_CE_hi; // Listening for pakets
}
void nRF24L01_config()
// Sets the important registers in the nRF24L01 module and powers the module
// in receiving mode
{
// Set RF channel
nRF24L01_config_register(RF_CH,nRF24L01_CH);
// Set length of incoming payload
nRF24L01_config_register(RX_PW_P0, nRF24L01_PAYLOAD);
//configure 1Mbps
uint8_t nRF24L01_PWR_RATE = ( (0<<LNA_HCURR) | (00<RF_PWR) | (0<<RF_DR)); // 18dbm & 1Mbps
nRF24L01_write_register(RF_SETUP, &nRF24L01_PWR_RATE,1);
// Reset status register
nRF24L01_config_register(STATUS,((1<<TX_DS)|(1<<MAX_RT)));
// Start receiver
//PTX = 0; // Start in receiving mode
RX_POWERUP; // Power up in receiving mode
nRF24L01_CE_hi; // Listening for pakets
//nRF24L01_CE_lo;
}
extern void nRF24L01_get_data(uint8_t * data)
// Reads nRF24L01_PAYLOAD bytes into data array
{
nRF24L01_CSN_lo; // Pull down chip select
nRF24L01_CE_lo;
spi_transmit_byte( R_RX_PAYLOAD ); // Send cmd to read rx payload
spi_transfer_array(data,data,nRF24L01_PAYLOAD); // Read payload
nRF24L01_CSN_hi; // Pull up chip select
nRF24L01_config_register(STATUS,(1<<RX_DR)); // Reset status register
nRF24L01_CE_hi;
//Clear the TX FIFO
nRF24L01_CSN_lo; // Pull down chip select
spi_transmit_byte( FLUSH_TX ); // Write cmd to flush tx fifo
nRF24L01_CSN_hi; // Pull up chip select
}
