unsigned char recvBeacon( ob_data* block ) {
unsigned long crc;
unsigned char ret=0, status;
ob_switchRXMode();
if((AT91F_PIO_GetInput(AT91C_BASE_PIOA)&IRQ_PIN)==0)
{
portENTER_CRITICAL();
status=nRFAPI_GetStatus();
if(status&MASK_RX_DR_FLAG ) {
ret=nRFAPI_RX((unsigned char*)block, sizeof(ob_data) );
if(ret>0) {
// CRC Check
crc = env_crc16(block->payload, sizeof(block->payload) );
if(block->crc == swapshort(crc)) {
increment(ob_int_mgmt.rx_beacons, 4);
} else {
increment(ob_int_mgmt.fail_rx_beacons, 4);
ret=0;
}
}
nRFAPI_FlushRX();
}
nRFAPI_ClearIRQ(status);
portEXIT_CRITICAL ();
}
return ret;
}
unsigned char nRFAPI_Init(
unsigned char channel,
const unsigned char *mac,
unsigned char mac_size,
unsigned char features
)
{
unsigned char i;
// init lower layer
nRFCMD_Init();
// check validity
if( mac_size<3 ||
mac_size>5 ||
!nRFAPI_DetectChip()
)
return 0;
// update mac
nRFAPI_SetSizeMac(mac_size);
nRFAPI_SetTxMAC(mac,mac_size);
// enables pipe
nRFAPI_SetRxMAC(mac,mac_size,0);
nRFAPI_PipesEnable(ERX_P0);
nRFAPI_PipesAck(0);
// set payload sizes
for(i=0; i<=5; i++)
nRFAPI_SetPipeSizeRX(i,2);
// set TX retry count
nRFAPI_TxRetries(0);
// set selected channel
nRFAPI_SetChannel(channel);
// set Tx power
nRFAPI_SetTxPower(3);
// flush FIFOs
nRFAPI_FlushRX();
nRFAPI_FlushTX();
nRFAPI_SetRxMode(0);
if(features != 0)
nRFAPI_SetFeatures(features);
return 1;
}
uint8_t
nRFAPI_Init (uint8_t channel,
const uint8_t * mac, uint8_t mac_size, uint8_t features)
{
uint8_t i;
// init IO layer of nRF24L01
nRFCMD_Init ();
/* wait for nRF to boot */
pmu_sleep_ms(10);
// check validity
if (mac_size < 3 || mac_size > 5 || !nRFAPI_DetectChip ())
return 0;
// update mac
nRFAPI_SetSizeMac (mac_size);
nRFAPI_SetTxMAC (mac, mac_size);
// enables pipe
nRFAPI_SetRxMAC (mac, mac_size, 0);
nRFAPI_PipesEnable (ERX_P0);
nRFAPI_PipesAck (0);
// set payload sizes
for (i = 0; i <= 5; i++)
nRFAPI_SetPipeSizeRX (i, 16);
// set TX retry count
nRFAPI_TxRetries (0);
// set selected channel
nRFAPI_SetChannel (channel);
// set Tx power
nRFAPI_SetTxPower (3);
// flush FIFOs
nRFAPI_FlushRX ();
nRFAPI_FlushTX ();
if (features != 0)
nRFAPI_SetFeatures (features);
return 1;
}
unsigned char nRFAPI_RX(unsigned char *buf,unsigned char count)
{
unsigned char size,pipe;
pipe=nRFAPI_GetPipeCurrent();
if(pipe>=7)
size=0;
else
{
size=nRFAPI_GetPipeSizeRX(pipe);
if(size<=count)
nRFCMD_RegReadBuf(RD_RX_PLOAD,buf,size);
else
{
nRFAPI_FlushRX();
size=0;
}
}
return size;
}
uint8_t
nRFAPI_RX (uint8_t * buf, uint8_t count)
{
uint8_t size, pipe;
pipe = nRFAPI_GetPipeCurrent ();
if (pipe >= 7)
size = 0;
else
{
size = nRFAPI_GetPipeSizeRX (pipe);
if (size <= count)
nRFCMD_RegReadBuf (RD_RX_PLOAD, buf, size);
else
{
nRFAPI_FlushRX ();
size = 0;
}
}
return size;
}
