diff options
Diffstat (limited to 'usrp2/firmware/lib')
| -rw-r--r-- | usrp2/firmware/lib/db_xcvr2450.c | 155 |
1 files changed, 131 insertions, 24 deletions
diff --git a/usrp2/firmware/lib/db_xcvr2450.c b/usrp2/firmware/lib/db_xcvr2450.c index be3162379..1db817dc5 100644 --- a/usrp2/firmware/lib/db_xcvr2450.c +++ b/usrp2/firmware/lib/db_xcvr2450.c @@ -67,7 +67,7 @@ struct db_xcvr2450_common { int d_pabias_delay, d_pabias; //rx_rf_gain, rx_bb_gain;//, d_txgain; //int d_rx_rf_gain, d_rx_bb_gain; - int d_reg_standby, d_reg_int_divider, d_reg_frac_divider, d_reg_bandselpll; + int d_reg_standby;//, d_reg_int_divider, d_reg_frac_divider, d_reg_bandselpll; int d_reg_cal, dsend_reg, d_reg_lpf, d_reg_rxrssi_ctrl, d_reg_txlin_gain; int d_reg_pabias;//, d_reg_rxgain;//, d_reg_txgain; @@ -147,7 +147,7 @@ struct db_xcvr2450_tx db_xcvr2450_tx = { }; /************************************************** - * Registers + * Set Registers **************************************************/ void send_reg(struct db_xcvr2450_dummy *db, int v){ @@ -168,6 +168,94 @@ set_reg_rxgain(struct db_xcvr2450_dummy *db, int rx_bb_gain, int rx_rf_gain){ send_reg(db, reg_rxgain); } +void +set_reg_int_divider(struct db_xcvr2450_dummy *db){ + int reg_int_divider = (((db->common.d_frac_div & 0x03)<<16) | + (db->common.d_int_div<<4) | 3); + send_reg(db, reg_int_divider); +} + +void +set_reg_frac_divider(struct db_xcvr2450_dummy *db){ + int reg_frac_divider = ((db->common.d_frac_div & 0xfffc)<<2) | 4; + send_reg(db, reg_frac_divider); +} + +void +set_reg_bandselpll(struct db_xcvr2450_dummy *db){ + int reg_bandselpll = ((db->common.d_mimo<<17) | + (1<<16) | + (1<<15) | + (1<<11) | + (db->common.d_highband<<10) | + (db->common.d_cp_current<<9) | + (db->common.d_ref_div<<5) | + (db->common.d_five_gig<<4) | 5); + send_reg(db, reg_bandselpll); +} + +/************************************************** + * GPIO + **************************************************/ +void +set_gpio(struct db_xcvr2450_dummy *db){ + // We calculate four values: + // + // io_rx_while_rx: what to drive onto io_rx_* when receiving + // io_rx_while_tx: what to drive onto io_rx_* when transmitting + // io_tx_while_rx: what to drive onto io_tx_* when receiving + // io_tx_while_tx: what to drive onto io_tx_* when transmitting + // + // B1-B7 is ignored as gain is set serially for now. + + int rx_hp, tx_antsel, rx_antsel, tx_pa_sel; + if(db->common.d_rx_hp_pin) + rx_hp = RX_HP; + else + rx_hp = 0; + + if(db->common.d_tx_ant) + tx_antsel = ANTSEL_TX2_RX1; + else + tx_antsel = ANTSEL_TX1_RX2; + + if(db->common.d_rx_ant) + rx_antsel = ANTSEL_TX2_RX1; + else + rx_antsel = ANTSEL_TX1_RX2; + + if(db->common.d_five_gig) + tx_pa_sel = LB_PA_OFF; + else + tx_pa_sel = HB_PA_OFF; + + int io_rx_while_rx = EN|rx_hp|RX_EN; + int io_rx_while_tx = EN|rx_hp; + int io_tx_while_rx = HB_PA_OFF|LB_PA_OFF|rx_antsel|AD9515DIV; + int io_tx_while_tx = tx_pa_sel|tx_antsel|TX_EN|AD9515DIV; + //rx_set_atr_rxval(io_rx_while_rx); //TODO write to fpga regs? + //rx_set_atr_txval(io_rx_while_tx); + //tx_set_atr_rxval(io_tx_while_rx); + //tx_set_atr_txval(io_tx_while_tx); + + printf("GPIO: RXRX=%04X RXTX=%04X TXRX=%04X TXTX=%04X\n", + io_rx_while_rx, io_rx_while_tx, io_tx_while_rx, io_tx_while_tx); +} + +/************************************************** + * Read register + **************************************************/ +int +rx_read_io(){ + //int val; + //if(d_which) + // val = FR_RB_IO_RX_B_IO_TX_B; + //else + // val = FR_RB_IO_RX_A_IO_TX_A; + int t = 0;//usrp()->_read_fpga_reg(val); + return (t >> 16) & 0xffff; +} + /************************************************** * Init for TX and RX **************************************************/ @@ -239,6 +327,26 @@ xcvr2450_init(struct db_base *dbb){ } /************************************************** + * Lock detect + **************************************************/ +bool +lock_detect(){ + /* + @returns: the value of the VCO/PLL lock detect bit. + @rtype: 0 or 1 + */ + if(rx_read_io() & LOCKDET) { + return true; + } + else { // Give it a second chance + if(rx_read_io() & LOCKDET) + return true; + else + return false; + } +} + +/************************************************** * Set the freq **************************************************/ bool @@ -291,33 +399,32 @@ xcvr2450_set_freq(struct db_base *dbb, u2_fxpt_freq_t freq, u2_fxpt_freq_t *dc){ u2_fxpt_freq_round_to_int(freq), u2_fxpt_freq_round_to_int(vco_freq), db->common.d_ref_div, u2_fxpt_freq_round_to_int(phdet_freq), db->common.d_int_div, u2_fxpt_freq_round_to_int(*dc)); -/* - set_gpio(); - set_reg_int_divider(); - set_reg_frac_divider(); - set_reg_bandselpll(); - args.ok = lock_detect(); - args.baseband_freq = actual_freq; + set_gpio(db); + set_reg_int_divider(db); + set_reg_frac_divider(db); + set_reg_bandselpll(db); + + bool ok = lock_detect(); - if(args.ok) { - if((target_freq > 5.275e9) && (target_freq <= 5.35e9)) { - d_highband = 0; - set_reg_bandselpll(); - args.ok = lock_detect(); - //printf("swap to 0 at %f, ok %d\n", target_freq, args.ok); + if(ok) { + if((freq > U2_DOUBLE_TO_FXPT_FREQ(5.275e9)) && (freq <= U2_DOUBLE_TO_FXPT_FREQ(5.35e9))) { + db->common.d_highband = 0; + set_reg_bandselpll(db); + ok = lock_detect(); + printf("swap to 0 at %d, ok %d\n", u2_fxpt_freq_round_to_int(freq), ok); } - if((target_freq >= 5.25e9) && (target_freq <= 5.275e9)) { - d_highband = 1; - set_reg_bandselpll(); - args.ok = lock_detect(); - //printf("swap to 1 at %f, ok %d\n", target_freq, args.ok); + if((freq >= U2_DOUBLE_TO_FXPT_FREQ(5.25e9)) && (freq <= U2_DOUBLE_TO_FXPT_FREQ(5.275e9))) { + db->common.d_highband = 1; + set_reg_bandselpll(db); + ok = lock_detect(); + printf("swap to 1 at %d, ok %d\n", u2_fxpt_freq_round_to_int(freq), ok); } - if(!args.ok){ - //printf("Fail %f\n", target_freq); + if(!ok){ + printf("Fail %d\n", u2_fxpt_freq_round_to_int(freq)); } - }*/ - return true; + } + return ok; } /************************************************** |