fpga_regs_standard.h

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/* -*- c++ -*- */
/*
 * Copyright 2003,2004,2006 Free Software Foundation, Inc.
 * 
 * This file is part of GNU Radio
 * 
 * GNU Radio is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3, or (at your option)
 * any later version.
 * 
 * GNU Radio is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with GNU Radio; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */
#ifndef INCLUDED_FPGA_REGS_STANDARD_H
#define INCLUDED_FPGA_REGS_STANDARD_H

// Register numbers 0 to 31 are reserved for use in fpga_regs_common.h.
// Registers 64 to 79 are available for custom FPGA builds.


// DDC / DUC

#define FR_INTERP_RATE          32      // [1,1024]
#define FR_DECIM_RATE           33      // [1,256]

// DDC center freq

#define FR_RX_FREQ_0            34
#define FR_RX_FREQ_1            35
#define FR_RX_FREQ_2            36
#define FR_RX_FREQ_3            37

// See below for DDC Starting Phase

// ------------------------------------------------------------------------
//  configure FPGA Rx mux
//
//    3                   2                   1                       
//  1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
// +-----------------------+-------+-------+-------+-------+-+-----+
// |      must be zero     | Q3| I3| Q2| I2| Q1| I1| Q0| I0|Z| NCH |
// +-----------------------+-------+-------+-------+-------+-+-----+
//
// There are a maximum of 4 digital downconverters in the the FPGA.
// Each DDC has two 16-bit inputs, I and Q, and two 16-bit outputs, I & Q.
//
// DDC I inputs are specified by the two bit fields I3, I2, I1 & I0
//
//   0 = DDC input is from ADC 0
//   1 = DDC input is from ADC 1
//   2 = DDC input is from ADC 2
//   3 = DDC input is from ADC 3
//
// If Z == 1, all DDC Q inputs are set to zero
// If Z == 0, DDC Q inputs are specified by the two bit fields Q3, Q2, Q1 & Q0
//
// NCH specifies the number of complex channels that are sent across
// the USB.  The legal values are 1, 2 or 4, corresponding to 2, 4 or
// 8 16-bit values.

#define FR_RX_MUX               38

// ------------------------------------------------------------------------
//  configure FPGA Tx Mux.
//
//    3                   2                   1                       
//  1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
// +-----------------------+-------+-------+-------+-------+-+-----+
// |                       | DAC3  | DAC2  | DAC1  |  DAC0 |0| NCH |
// +-----------------------------------------------+-------+-+-----+
//
// NCH specifies the number of complex channels that are sent across
// the USB.  The legal values are 1 or 2, corresponding to 2 or 4
// 16-bit values.
//
// There are two interpolators with complex inputs and outputs.
// There are four DACs.  (We use the DUC in each AD9862.)
//
// Each 4-bit DACx field specifies the source for the DAC and
// whether or not that DAC is enabled.  Each subfield is coded
// like this: 
//
//    3 2 1 0
//   +-+-----+
//   |E|  N  |
//   +-+-----+
//
// Where E is set if the DAC is enabled, and N specifies which
// interpolator output is connected to this DAC.
//
//  N   which interp output
// ---  -------------------
//  0   chan 0 I
//  1   chan 0 Q
//  2   chan 1 I
//  3   chan 1 Q

#define FR_TX_MUX               39

// ------------------------------------------------------------------------
// REFCLK control
//
// Control whether a reference clock is sent to the daughterboards,
// and what frequency.  The refclk is sent on d'board i/o pin 0.
//
//    3                   2                   1                       
//  1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
// +-----------------------------------------------+-+------------+
// |             Reserved (Must be zero)           |E|   DIVISOR  |
// +-----------------------------------------------+-+------------+

//
// Bit 7  -- 1 turns on refclk, 0 allows IO use
// Bits 6:0 Divider value

#define FR_TX_A_REFCLK          40
#define FR_RX_A_REFCLK          41
#define FR_TX_B_REFCLK          42
#define FR_RX_B_REFCLK          43

#  define bmFR_REFCLK_EN           0x80
#  define bmFR_REFCLK_DIVISOR_MASK 0x7f

// ------------------------------------------------------------------------
// DDC Starting Phase

#define FR_RX_PHASE_0           44
#define FR_RX_PHASE_1           45
#define FR_RX_PHASE_2           46
#define FR_RX_PHASE_3           47

// ------------------------------------------------------------------------
// Tx data format control register
//
//    3                   2                   1                       
//  1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
// +-------------------------------------------------------+-------+
// |                    Reserved (Must be zero)            |  FMT  |
// +-------------------------------------------------------+-------+
//
//  FMT values:

#define FR_TX_FORMAT            48
#  define bmFR_TX_FORMAT_16_IQ          0       // 16-bit I, 16-bit Q

// ------------------------------------------------------------------------
// Rx data format control register
//
//    3                   2                   1                       
//  1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
// +-----------------------------------------+-+-+---------+-------+
// |          Reserved (Must be zero)        |B|Q|  WIDTH  | SHIFT |
// +-----------------------------------------+-+-+---------+-------+
//
//  FMT values:

#define FR_RX_FORMAT            49

#  define bmFR_RX_FORMAT_SHIFT_MASK     (0x0f <<  0)    // arithmetic right shift [0, 15]
#  define bmFR_RX_FORMAT_SHIFT_SHIFT    0
#  define bmFR_RX_FORMAT_WIDTH_MASK     (0x1f <<  4)    // data width in bits [1, 16] (not all valid)
#  define bmFR_RX_FORMAT_WIDTH_SHIFT    4
#  define bmFR_RX_FORMAT_WANT_Q         (0x1  <<  9)    // deliver both I & Q, else just I
#  define bmFR_RX_FORMAT_BYPASS_HB      (0x1  << 10)    // bypass half-band filter

// The valid combinations currently are:
//
//   B  Q  WIDTH  SHIFT
//   0  1    16     0
//   0  1     8     8


// Possible future values of WIDTH = {4, 2, 1}
// 12 takes a bit more work, since we need to know packet alignment.

// ------------------------------------------------------------------------
// FIXME register numbers 50 to 63 are available

// ------------------------------------------------------------------------
// Registers 64 to 95 are reserved for user custom FPGA builds.
// The standard USRP software will not touch these.

#define FR_USER_0       64
#define FR_USER_1       65
#define FR_USER_2       66
#define FR_USER_3       67
#define FR_USER_4       68
#define FR_USER_5       69
#define FR_USER_6       70
#define FR_USER_7       71
#define FR_USER_8       72
#define FR_USER_9       73
#define FR_USER_10      74
#define FR_USER_11      75
#define FR_USER_12      76
#define FR_USER_13      77
#define FR_USER_14      78
#define FR_USER_15      79
#define FR_USER_16      80
#define FR_USER_17      81
#define FR_USER_18      82
#define FR_USER_19      83
#define FR_USER_20      84
#define FR_USER_21      85
#define FR_USER_22      86
#define FR_USER_23      87
#define FR_USER_24      88
#define FR_USER_25      89
#define FR_USER_26      90
#define FR_USER_27      91
#define FR_USER_28      92
#define FR_USER_29      93
#define FR_USER_30      94
#define FR_USER_31      95

//Registers needed for multi usrp master/slave configuration
//
//Rx Master/slave control register (FR_RX_MASTER_SLAVE = FR_USER_0)
//
#define FR_RX_MASTER_SLAVE              64
#define bitnoFR_RX_SYNC                 0
#define bitnoFR_RX_SYNC_MASTER          1
#define bitnoFR_RX_SYNC_SLAVE           2
#  define bmFR_RX_SYNC          (1 <<bitnoFR_RX_SYNC) //1 If this is a master "sync now" and send sync to slave.
                                                      //  If this is a slave "sync now" (testing purpose only)
                                                      //  Sync is allmost the same as reset (clear all counters and buffers) 
                                                      //  except that the io outputs and settings don't get reset (otherwise it couldn't send the sync to the slave)
                                                      //0 Normal operation

#  define bmFR_RX_SYNC_MASTER (1 <<bitnoFR_RX_SYNC_MASTER) //1 This is a rx sync master, output sync_rx on rx_a_io[15]
                                                           //0 This is not a rx sync master
#  define bmFR_RX_SYNC_SLAVE  (1 <<bitnoFR_RX_SYNC_SLAVE) //1 This is a rx sync slave, follow sync_rx on rx_a_io[bitnoFR_RX_SYNC_INPUT_IOPIN]
                                                          //0 This is not an rx sync slave.

//Caution The master settings will output values on the io lines.
//They inheritely enable these lines as output. If you have a daughtercard which uses these lines also as output then you will burn your usrp and daughtercard.
//If you set the slave bits then your usrp won't do anything if you don't connect a master.
// Rx Master/slave control register
//
// The way this is supposed to be used is connecting a (short) 16pin flatcable from an rx daughterboard in RXA master io_rx[8..15] to slave io_rx[8..15] on RXA of slave usrp
// This can be done with basic_rx boards or dbsrx boards
//dbsrx: connect master-J25 to slave-J25
//basic rx: connect J25 to slave-J25
//CAUTION: pay attention to the lineup of your connector.
//The red line (pin1) should be at the same side of the daughterboards on master and slave.
//If you turnaround the cable on one end you will burn your usrp.

//You cannot use a 16pin flatcable if you are using FLEX400 or FLEX2400 daughterboards, since these use a lot of the io pins.
//You can still link them but you must use only a 2pin or 1pin cable
//You can also use a 2-wire link. put a 2pin header on io[15],gnd of the master RXA daughterboard and connect it to io15,gnd of the slave RXA db.
//You can use a cable like the ones found with the leds on the mainbord of a PC.
//Make sure you don't twist the cable, otherwise you connect the sync output to ground.
//To be save you could also just use a single wire from master io[15] to slave io[15], but this is not optimal for signal integrity.


// Since rx_io[0] can normally be used as a refclk and is not exported on all daughterboards this line
// still has the refclk function if you use the master/slave setup (it is not touched by the master/slave settings).
// The master/slave circuitry will only use io pin 15 and does not touch any of the other io pins.
#define bitnoFR_RX_SYNC_INPUT_IOPIN             15
#define bmFR_RX_SYNC_INPUT_IOPIN                (1<<bitnoFR_RX_SYNC_INPUT_IOPIN)
//TODO the output pin is still hardcoded in the verilog code, make it listen to the following define
#define bitnoFR_RX_SYNC_OUTPUT_IOPIN    15
#define bmFR_RX_SYNC_OUTPUT_IOPIN       (1<<bitnoFR_RX_SYNC_OUTPUT_IOPIN)
// =======================================================================
// READBACK Registers
// =======================================================================

#define FR_RB_IO_RX_A_IO_TX_A   1       // read back a-side i/o pins
#define FR_RB_IO_RX_B_IO_TX_B   2       // read back b-side i/o pins

// ------------------------------------------------------------------------
// FPGA Capability register
//
//    3                   2                   1                       
//  1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
// +-----------------------------------------------+-+-----+-+-----+
// |                    Reserved (Must be zero)    |T|NDUC |R|NDDC |
// +-----------------------------------------------+-+-----+-+-----+
//
// Bottom 4-bits are Rx capabilities
// Next   4-bits are Tx capabilities

#define FR_RB_CAPS      3
#  define bmFR_RB_CAPS_NDDC_MASK        (0x7 << 0)   // # of digital down converters 0,1,2,4
#  define bmFR_RB_CAPS_NDDC_SHIFT       0
#  define bmFR_RB_CAPS_RX_HAS_HALFBAND  (0x1 << 3)
#  define bmFR_RB_CAPS_NDUC_MASK        (0x7 << 4)   // # of digital up converters 0,1,2
#  define bmFR_RB_CAPS_NDUC_SHIFT       4
#  define bmFR_RB_CAPS_TX_HAS_HALFBAND  (0x1 << 7)


#endif /* INCLUDED_FPGA_REGS_STANDARD_H */