Exemplo n.º 1
0
Arquivo: rf233.c Projeto: Idolf/tock
/**
 * \brief      Send data: first prepares, then transmits
 * \param payload         Pointer to data to copy/send
 * \param payload_len     length of data to copy
 * \return     Returns success/fail, refer to radio.h for explanation
 */
int rf233_send(const void *payload, unsigned short payload_len) {
  PRINTF("RF233: send %u\n", payload_len);
  if (rf233_prepare(payload, payload_len) != RADIO_TX_OK) {
    return RADIO_TX_ERR;
  } 
  return rf233_transmit();
}
Exemplo n.º 2
0
/**
 * \brief      prepare a frame and the radio for immediate transmission 
 * \param payload         Pointer to data to copy/send
 * \param payload_len     length of data to copy
 * \return     Returns success/fail, refer to radio.h for explanation
 */
int
rf233_prepare(const void *payload, unsigned short payload_len)
{
#if DEBUG_PRINTDATA
  int i;
#endif  /* DEBUG_PRINTDATA */
  uint8_t templen;
  uint8_t radio_status;
  uint8_t data[130];

#if USE_HW_FCS_CHECK
  /* Add length of the FCS (2 bytes) */
  templen = payload_len + 2;
#else   /* USE_HW_FCS_CHECK */
  /* FCS is assumed to already be included in the payload */
  templen = payload_len;
#endif  /* USE_HW_FCS_CHECK */
 //data = templen;
 
/*
for(i = 0; i < templen; i++) {
	data++;
	data =(uint8_t *)(payload + i);
	
}*/
//memcpy(data,&templen,1);
data[0] = templen;
memcpy(&data[1],payload,templen);
//data--;
#if DEBUG_PRINTDATA
  PRINTF("RF233 prepare (%u/%u): 0x", payload_len, templen);
  for(i = 0; i < templen; i++) {
    PRINTF("%02x", *(uint8_t *)(payload + i));
  }
  PRINTF("\r\n");
#endif  /* DEBUG_PRINTDATA */
   
  PRINTF("RF233: prepare %u\r\n", payload_len);
  if(payload_len > MAX_PACKET_LEN) {
    PRINTF("RF233: error, frame too large to tx\r\n");
    return RADIO_TX_ERR;
  }

  /* check that the FIFO is clear to access */
  radio_status=rf233_status();
  #if NULLRDC_CONF_802154_AUTOACK_HW
  if(radio_status == STATE_BUSY_RX_AACK || radio_status == STATE_BUSY_TX_ARET) {
	  PRINTF("RF233: TRX buffer unavailable: prep when %s\r\n", radio_status == STATE_BUSY_RX_AACK ? "rx" : "tx");
  #else
   if(radio_status == STATE_BUSY_RX || radio_status == STATE_BUSY_TX) {
	   PRINTF("RF233: TRX buffer unavailable: prep when %s\r\n", radio_status == STATE_BUSY_RX? "rx" : "tx");
  #endif
    
    return RADIO_TX_ERR;
  }

  /* Write packet to TX FIFO. */
  PRINTF("RF233 len = %u\r\n", payload_len);
  trx_frame_write((uint8_t *)data, templen+1);
  return RADIO_TX_OK;
}
/*---------------------------------------------------------------------------*/
/**
 * \brief      Transmit a frame already put in the radio with 'prepare'
 * \param payload_len    Length of the frame to send
 * \return     Returns success/fail, refer to radio.h for explanation
 */
int
rf233_transmit(unsigned short payload_len)
{
  static uint8_t status_now;
  PRINTF("RF233: tx %u\r\n", payload_len);

  /* prepare for TX */
  
  status_now = rf233_status();
   //status_now = trx_reg_read(RF233_REG_TRX_RPC);
  #if NULLRDC_CONF_802154_AUTOACK_HW
  if(status_now == STATE_BUSY_RX_AACK || status_now == STATE_BUSY_TX_ARET) {
  #else
  if(status_now == STATE_BUSY_RX || status_now == STATE_BUSY_TX) {
  #endif
    PRINTF("RF233: collision, was receiving 0x%02X\r\n",status_now);
    /* NOTE: to avoid loops */
    return RADIO_TX_ERR;;
    // return RADIO_TX_COLLISION;
  }
  if(status_now != STATE_PLL_ON) {
    /* prepare for going to state TX, should take max 80 us */
    //RF233_COMMAND(TRXCMD_PLL_ON);
	trx_reg_write(RF233_REG_TRX_STATE,0x09);
   // BUSYWAIT_UNTIL(trx_reg_read(RF233_REG_TRX_STATUS) == STATE_PLL_ON, 1 * RTIMER_SECOND/1000);
   //delay_ms(10);
   //status_now = trx_reg_read(RF233_REG_TRX_STATE);
   do 
   {
	   status_now = trx_bit_read(0x01, 0x1F, 0);
   } while (status_now == 0x1f);
  }

  if(rf233_status() != STATE_PLL_ON) {
    /* failed moving into PLL_ON state, gracefully try to recover */
    PRINTF("RF233: failed going to PLLON\r\n");
    RF233_COMMAND(TRXCMD_PLL_ON);   /* try again */
	static uint8_t state;
	state = rf233_status();
    if(state != STATE_PLL_ON) {
      /* give up and signal big fail (should perhaps reset radio core instead?) */
      PRINTF("RF233: graceful recovery (in tx) failed, giving up. State: 0x%02X\r\n", rf233_status());
      return RADIO_TX_ERR;
    }
  }

  /* perform transmission */
  ENERGEST_OFF(ENERGEST_TYPE_LISTEN);
  ENERGEST_ON(ENERGEST_TYPE_TRANSMIT);
#if NULLRDC_CONF_802154_AUTOACK_HW
  RF233_COMMAND(TRXCMD_TX_ARET_ON);
#endif
  RF233_COMMAND(TRXCMD_TX_START);
   flag_transmit=1;
   //delay_ms(5);
  //printf("RTIMER value %d",RTIMER_NOW());

#if !NULLRDC_CONF_802154_AUTOACK_HW
    BUSYWAIT_UNTIL(rf233_status() == STATE_BUSY_TX, RTIMER_SECOND/2000);
   // printf("RTIMER value1 %d",RTIMER_NOW());
   // printf("\r\nSTATE_BUSY_TX");
  BUSYWAIT_UNTIL(rf233_status() != STATE_BUSY_TX, 10 * RTIMER_SECOND/1000);
  // printf("RTIMER value2 %d",RTIMER_NOW());
#endif

  ENERGEST_OFF(ENERGEST_TYPE_TRANSMIT);
  ENERGEST_ON(ENERGEST_TYPE_LISTEN);

#if !NULLRDC_CONF_802154_AUTOACK_HW
   if(rf233_status() != STATE_PLL_ON) {
    // something has failed 
    PRINTF("RF233: radio fatal err after tx\r\n");
    radiocore_hard_recovery();
    return RADIO_TX_ERR;
  }
  RF233_COMMAND(TRXCMD_RX_ON);
#else
	BUSYWAIT_UNTIL(ack_status == 1, 10 * RTIMER_SECOND/1000);
	if((ack_status))
	{
	//	printf("\r\nrf233 sent\r\n ");
		ack_status=0;
	//	printf("\nACK received");
		return RADIO_TX_OK;
	}
	else
	{
	//	printf("\nNOACK received");		
		return RADIO_TX_NOACK;
	}
	
#endif

  PRINTF("RF233: tx ok\r\n");
  return RADIO_TX_OK;
}
/*---------------------------------------------------------------------------*/
/**
 * \brief      Send data: first prepares, then transmits
 * \param payload         Pointer to data to copy/send
 * \param payload_len     length of data to copy
 * \return     Returns success/fail, refer to radio.h for explanation
 */
int
rf233_send(const void *payload, unsigned short payload_len)
{
  PRINTF("RF233: send %u\r\n", payload_len);
  if(rf233_prepare(payload, payload_len) == RADIO_TX_ERR) {
  return RADIO_TX_ERR;
  } 
  return rf233_transmit(payload_len);
}
/*---------------------------------------------------------------------------*/
/**
 * \brief      read a received frame out of the radio buffer 
 * \param buf         pointer to where to copy received data
 * \param bufsize     Maximum size we can copy into bufsize
 * \return     Returns length of data read (> 0) if successful
 * \retval -1  Failed, was transmitting so FIFO is invalid
 * \retval -2  Failed, rx timed out (stuck in rx?)
 * \retval -3  Failed, too large frame for buffer
 * \retval -4  Failed, CRC/FCS failed (if USE_HW_FCS_CHECK is true)
 */
int
rf233_read(void *buf, unsigned short bufsize)
{
//  uint8_t radio_state;
  uint8_t ed;       /* frame metadata */
  uint8_t frame_len = 0;
  uint8_t len = 0;
  int rssi;
#if DEBUG_PRINTDATA
  uint8_t tempreadlen;
#endif  /* DEBUG_PRINTDATA */

  if(pending_frame == 0) {
    return 0;
  }
  pending_frame = 0;

 /* / * check that data in FIFO is valid * /
  radio_state = RF233_STATUS();
  if(radio_state == STATE_BUSY_TX) {
    / * data is invalid, bail out * /
    PRINTF("RF233: read while in BUSY_TX ie invalid, dropping.\n");
    return -1;
  }
  if(radio_state == STATE_BUSY_RX) {
    / * still receiving - data is invalid, wait for it to finish * /
    PRINTF("RF233: read while BUSY_RX, waiting.\n");
    BUSYWAIT_UNTIL(RF233_STATUS() != STATE_BUSY_RX, 10 * RTIMER_SECOND/1000);
	if(RF233_STATUS() == STATE_BUSY_RX) {
      PRINTF("RF233: timed out, still BUSY_RX, dropping.\n");
      return -2;
    }
  }
*/

  /* get length of data in FIFO */
  trx_frame_read(&frame_len, 1);
#if DEBUG_PRINTDATA
  tempreadlen = frame_len;
#endif  /* DEBUG_PRINTDATA */
  if(frame_len == 1) {
    frame_len = 0;
  }

  len = frame_len;
#if USE_HW_FCS_CHECK
  /* FCS has already been stripped */
  len = frame_len - 2;
#endif  /* USE_HW_FCS_CHECK */

  if(frame_len == 0) {
    return 0;
  }
  if(len > bufsize) {
    /* too large frame for the buffer, drop */
    PRINTF("RF233: too large frame for buffer, dropping (%u > %u).\r\n", frame_len, bufsize);
    flush_buffer();
    return -3;
  }
  PRINTF("RF233 read %u B\r\n", frame_len);

  /* read out the data into the buffer, disregarding the length and metadata bytes */
  trx_sram_read(1,(uint8_t *)buf, len);
#if DEBUG_PRINTDATA
  {
    int k;
    PRINTF("RF233: Read frame (%u/%u): ", tempreadlen, frame_len);
    for(k = 0; k < frame_len; k++) {
      PRINTF("%02x", *((uint8_t *)buf + k));
    }
    PRINTF("\r\n");
  }
#endif  /* DEBUG_PRINTDATA */

  /* 
   * Energy level during reception, ranges from 0x00 to 0x53 (=83d) with a
   * resolution of 1dB and accuracy of +/- 5dB. 0xFF means invalid measurement.
   * 0x00 means <= RSSI(base_val), which is -91dBm (typ). See datasheet 12.7.
   * Ergo, real RSSI is (ed-91) dBm or less.
   */
  #define RSSI_OFFSET       (91)
  ed = trx_reg_read(RF233_REG_PHY_ED_LEVEL);
  rssi = (int) ed - RSSI_OFFSET;
  packetbuf_set_attr(PACKETBUF_ATTR_RSSI, rssi);
  flush_buffer();

/*
#if USE_HW_FCS_CHECK
  {
    uint8_t crc_ok;   / * frame metadata * /
    crc_ok = rf233_arch_read_reg(RF233_REG_PHY_RSSI) & PHY_RSSI_CRC_VALID;
    if(crc_ok == 0) {
      / * CRC/FCS fail, drop * /
      PRINTF("RF233: CRC/FCS fail, dropping.\n");
      flush_buffer();
      return -4;
    }
  }
#endif  / * USE_HW_FCS_CHECK * /*/

  return len;
}