/***********************************************************************************
* @fn CC2520_REGWR24
*
* @brief Write three register bytes
*
* @param uint8 addr
* uint32 value
*
* @return none
*/
void CC2520_REGWR24(uint8 addr, uint32 value)
{
CC2520_SPI_BEGIN();
CC2520_SPI_TXRX(CC2520_INS_REGWR | addr);
CC2520_SPI_TXRX(LO_UINT16(LO_UINT32(value)));
CC2520_SPI_TXRX(HI_UINT16(LO_UINT32(value)));
CC2520_SPI_TXRX(LO_UINT16(HI_UINT32(value)));
CC2520_SPI_END();
}
/***********************************************************************************
* @fn CC2520_MEMWR24
*
* @brief Write memory 24 bits
*
* @param uint16 addr
* uint32 value
*
* @return uint8 - status byte
*/
uint8 CC2520_MEMWR24(uint16 addr, uint32 value)
{
uint8 s;
CC2520_SPI_BEGIN();
s = CC2520_SPI_TXRX(CC2520_INS_MEMWR | HI_UINT16(addr));
CC2520_SPI_TXRX(LO_UINT16(addr));
CC2520_SPI_TXRX(LO_UINT16(LO_UINT32(value)));
CC2520_SPI_TXRX(HI_UINT16(LO_UINT32(value)));
CC2520_SPI_TXRX(LO_UINT16(HI_UINT32(value)));
CC2520_SPI_END();
return s;
}
/***********************************************************************************
* @fn basicRfBuildHeader
*
* @brief Builds packet header according to IEEE 802.15.4 frame format
*
* @param buffer - Pointer to buffer to write the header
* destAddr - destination short address
* payloadLength - length of higher layer payload
*
* @return uint8 - length of header
*/
static uint8 basicRfBuildHeader(uint8* buffer, uint16 destAddr, uint8 payloadLength)
{
basicRfPktHdr_t *pHdr;
uint16 fcf;
pHdr= (basicRfPktHdr_t*)buffer;
// Populate packet header
pHdr->packetLength = payloadLength + BASIC_RF_PACKET_OVERHEAD_SIZE;
//pHdr->frameControlField = pConfig->ackRequest ? BASIC_RF_FCF_ACK : BASIC_RF_FCF_NOACK;
fcf= pConfig->ackRequest ? BASIC_RF_FCF_ACK : BASIC_RF_FCF_NOACK;
pHdr->fcf0 = LO_UINT16(fcf);
pHdr->fcf1 = HI_UINT16(fcf);
pHdr->seqNumber= txState.txSeqNumber;
pHdr->panId= pConfig->panId;
pHdr->destAddr= destAddr;
pHdr->srcAddr= pConfig->myAddr;
#ifdef SECURITY_CCM
// Add security to FCF, length and security header
pHdr->fcf0 |= BASIC_RF_SEC_ENABLED_FCF_BM_L;
pHdr->packetLength += PKT_LEN_MIC;
pHdr->packetLength += BASIC_RF_AUX_HDR_LENGTH;
pHdr->securityControl= SECURITY_CONTROL;
pHdr->frameCounter[0]= LO_UINT16(LO_UINT32(txState.frameCounter));
pHdr->frameCounter[1]= HI_UINT16(LO_UINT32(txState.frameCounter));
pHdr->frameCounter[2]= LO_UINT16(HI_UINT32(txState.frameCounter));
pHdr->frameCounter[3]= HI_UINT16(HI_UINT32(txState.frameCounter));
#endif
// Make sure bytefields are network byte order
UINT16_HTON(pHdr->panId);
UINT16_HTON(pHdr->destAddr);
UINT16_HTON(pHdr->srcAddr);
return BASIC_RF_HDR_SIZE;
}
