Esempi in C++ (Cpp) per u2p_set_word0

Esempio n. 1

void
start_rx_streaming_cmd(const u2_mac_addr_t *host, op_start_rx_streaming_t *p)
{
  host_mac_addr = *host;	// remember who we're sending to

  /*
   * Construct  ethernet header and word0 and preload into two buffers
   */
  u2_eth_packet_t	pkt;
  memset(&pkt, 0, sizeof(pkt));
  pkt.ehdr.dst = *host;
  pkt.ehdr.ethertype = U2_ETHERTYPE;
  u2p_set_word0(&pkt.fixed, 0, 0);
  // DSP RX will fill in timestamp

  memcpy_wa(buffer_ram(DSP_RX_BUF_0), &pkt, sizeof(pkt));
  memcpy_wa(buffer_ram(DSP_RX_BUF_1), &pkt, sizeof(pkt));


  if (FW_SETS_SEQNO)
    fw_seqno = 0;

  streaming_items_per_frame = p->items_per_frame;
  restart_streaming();
}

Esempio n. 2

static void
start_tx_transfers(void)
{
  bp_clear_buf(DSP_TX_BUF_0);	// FIXME, really goes in state machine
  bp_clear_buf(DSP_TX_BUF_1);

  // fill everything with a constant 32k + 0j

  uint32_t const_sample = (32000 << 16) | 0;
  int i;
  for (i = 0; i < BP_NLINES; i++){
    buffer_ram(DSP_TX_BUF_0)[i] = const_sample;
    buffer_ram(DSP_TX_BUF_1)[i] = const_sample;
  }

  /*
   * Construct  ethernet header and word0 and preload into two buffers
   */
  u2_eth_packet_t	pkt;
  memset(&pkt, 0, sizeof(pkt));
  //pkt.ehdr.dst = *host;
  pkt.ehdr.ethertype = U2_ETHERTYPE;
  u2p_set_word0(&pkt.fixed,
		U2P_TX_IMMEDIATE | U2P_TX_START_OF_BURST, 0);
  u2p_set_timestamp(&pkt.fixed, T_NOW);

  memcpy_wa(buffer_ram(DSP_TX_BUF_0), &pkt, sizeof(pkt));
  memcpy_wa(buffer_ram(DSP_TX_BUF_1), &pkt, sizeof(pkt));


  int tx_scale = 256;

  // setup Tx DSP regs
  dsp_tx_regs->clear_state = 1;			// reset
  dsp_tx_regs->freq = 408021893;		// 9.5 MHz [2**32 * fc/fsample]
  dsp_tx_regs->scale_iq = (tx_scale << 16) | tx_scale;
  dsp_tx_regs->interp_rate = 32;

  // kick off the state machine
  // dbsm_start(&dsp_rx_sm);

  SEND_CONST_TO_DSP_TX();	// send constant buffer to DSP TX
}