From cea78cb9b42943fe3e6e0bb598bb8e7cb7caead3 Mon Sep 17 00:00:00 2001
From: eb <eb@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Tue, 14 Oct 2008 02:07:19 +0000
Subject: [PATCH] new tx and rx mux registers

git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@9789 221aa14e-8319-0410-a670-987f0aec2ac5
---
 usrp2/firmware/lib/memory_map.h | 58 +++++++++++++++++++++++++++++++++
 usrp2/firmware/lib/u2_init.c    |  4 +++
 2 files changed, 62 insertions(+)

diff --git a/usrp2/firmware/lib/memory_map.h b/usrp2/firmware/lib/memory_map.h
index aa9951e7..bbf8165b 100644
--- a/usrp2/firmware/lib/memory_map.h
+++ b/usrp2/firmware/lib/memory_map.h
@@ -378,6 +378,41 @@ typedef struct {
   volatile uint32_t     interp_rate;
   volatile uint32_t     clear_state;	// clears out state machine, fifos,
                                         //   NOT freq, scale, interp
+  /*!
+   * \brief output mux configuration.
+   *
+   * <pre>
+   *     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
+   *  +-------------------------------+-------+-------+-------+-------+
+   *  |                                               | DAC1  |  DAC0 |
+   *  +-------------------------------+-------+-------+-------+-------+
+   * 
+   *  There are N DUCs (1 now) with complex inputs and outputs.
+   *  There are two DACs.
+   * 
+   *  Each 4-bit DACx field specifies the source for the DAC
+   *  Each subfield is coded like this: 
+   * 
+   *     3 2 1 0
+   *    +-------+
+   *    |   N   |
+   *    +-------+
+   * 
+   *  N specifies which DUC output is connected to this DAC.
+   * 
+   *   N   which interp output
+   *  ---  -------------------
+   *   0   DUC 0 I
+   *   1   DUC 0 Q
+   *   2   DUC 1 I
+   *   3   DUC 1 Q
+   *
+   * The default value is 0x10
+   * </pre>
+   */
+  volatile uint32_t	tx_mux;
+
 } dsp_tx_regs_t;
   
 #define dsp_tx_regs ((dsp_tx_regs_t *) DSP_TX_BASE)
@@ -402,6 +437,29 @@ typedef struct {
   volatile uint32_t     dcoffset_q;     // Bit 31 high sets fixed offset mode, using lower 14 bits
   volatile uint32_t     adc_mux;        // 4 bits -- lowest 2 for adc_i, next for adc_q
 
+  /*!
+   * \brief input mux configuration.
+   *
+   * This determines which ADC (or constant zero) is connected to 
+   * each DDC input.  There are N DDCs (1 now).  Each has two inputs.
+   *
+   * <pre>
+   * Mux value:
+   *
+   *    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
+   * +-------+-------+-------+-------+-------+-------+-------+-------+
+   * |                                               |Q1 |I1 |Q0 |I0 |
+   * +-------+-------+-------+-------+-------+-------+-------+-------+
+   *
+   * Each 2-bit I field is either 00 (A/D A), 01 (A/D B) or 1X (const zero)
+   * Each 2-bit Q field is either 00 (A/D A), 01 (A/D B) or 1X (const zero)
+   *
+   * The default value is 0x44444444
+   * </pre>
+   */
+  volatile uint32_t	rx_mux;
+
 } dsp_rx_regs_t;
   
 #define dsp_rx_regs ((dsp_rx_regs_t *) DSP_RX_BASE)
diff --git a/usrp2/firmware/lib/u2_init.c b/usrp2/firmware/lib/u2_init.c
index b1339634..94805569 100644
--- a/usrp2/firmware/lib/u2_init.c
+++ b/usrp2/firmware/lib/u2_init.c
@@ -86,6 +86,10 @@ u2_init(void)
   ad9777_write_reg(11, 0);	// Q dac offset
   ad9777_write_reg(12, 0);
   
+  // Initial values for tx and rx mux registers
+  dsp_tx_regs->tx_mux = 0x10;
+  dsp_rx_regs->rx_mux = 0x44444444;
+
   // Set up serdes
   output_regs->serdes_ctrl = (SERDES_ENABLE | SERDES_RXEN);
 
-- 
2.30.2