rfnoc: Add window RFNoC block controller

3 files changed, 76 insertions, 0 deletions

diff --git a/host/include/uhd/rfnoc/CMakeLists.txt b/host/include/uhd/rfnoc/CMakeLists.txt
index 9c389af03..cc91a6125 100644
--- a/host/include/uhd/rfnoc/CMakeLists.txt
+++ b/host/include/uhd/rfnoc/CMakeLists.txt
@@ -42,6 +42,7 @@ UHD_INSTALL(FILES
     radio_control.hpp
     split_stream_block_control.hpp
     vector_iir_block_control.hpp
+    window_block_control.hpp
 
     DESTINATION ${INCLUDE_DIR}/uhd/rfnoc
     COMPONENT headers
diff --git a/host/include/uhd/rfnoc/defaults.hpp b/host/include/uhd/rfnoc/defaults.hpp
index e8f1c11e7..2104e8416 100644
--- a/host/include/uhd/rfnoc/defaults.hpp
+++ b/host/include/uhd/rfnoc/defaults.hpp
@@ -81,5 +81,6 @@ static const noc_id_t FOSPHOR_BLOCK      = 0x666F0000;
 static const noc_id_t SPLIT_STREAM_BLOCK = 0x57570000;
 static const noc_id_t RADIO_BLOCK        = 0x12AD1000;
 static const noc_id_t VECTOR_IIR_BLOCK   = 0x11120000;
+static const noc_id_t WINDOW_BLOCK       = 0xD0530000;
 
 }} // namespace uhd::rfnoc
diff --git a/host/include/uhd/rfnoc/window_block_control.hpp b/host/include/uhd/rfnoc/window_block_control.hpp
new file mode 100644
index 000000000..316a1a288
--- /dev/null
+++ b/host/include/uhd/rfnoc/window_block_control.hpp
@@ -0,0 +1,74 @@
+//
+// Copyright 2020 Ettus Research, a National Instruments Brand
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
+
+#pragma once
+
+#include <uhd/config.hpp>
+#include <uhd/rfnoc/noc_block_base.hpp>
+#include <uhd/types/ranges.hpp>
+
+namespace uhd { namespace rfnoc {
+
+/*! Window Block Control Class
+ *
+ * The Window Block is a windowing block for RFNoC that is intended to be
+ * used with the FFT block. The block can be configured with coefficients,
+ * by which the samples in each input packet are multiplied before begin
+ * output. The first sample of the first packet is multiplied by the first
+ * first coefficient, the second sample is multiplied by the second
+ * coefficient, and so on.
+ *
+ * The RFNoC window block supports a configurable number of pairs of input
+ * and output ports of sc16 data (16-bit fixed-point complex samples) and
+ * a configurable window length and coefficients for each.
+ */
+class UHD_API window_block_control : public noc_block_base
+{
+public:
+    RFNOC_DECLARE_BLOCK(window_block_control)
+
+    // Block registers
+    static const uint32_t REG_WINDOW_BLOCK_SIZE;
+
+    static const uint32_t REG_WINDOW_LEN_OFFSET;
+    static const uint32_t REG_WINDOW_MAX_LEN_OFFSET;
+    static const uint32_t REG_WINDOW_LOAD_COEFF_OFFSET;
+    static const uint32_t REG_WINDOW_LOAD_COEFF_LAST_OFFSET;
+
+    /*! Get the maximum number of window coefficients supported by this block
+     *
+     * Get the maximum number of window coefficients supported by this
+     * block.
+     *
+     * \param chan The channel to retrieve the maximum number of coefficients from
+     * \returns The maximum number of window coefficients supported by this block
+     */
+    virtual size_t get_max_num_coefficients(const size_t chan) const = 0;
+
+    /*! Set the window coefficients
+     *
+     * Set the window coefficients for a given channel. The number of
+     * coefficients must be equal to or less than the maximum number of
+     * coefficients supported by the given channel of the block.
+     *
+     * \param coeffs A vector of integer coefficients for the window
+     * \param chan The channel to apply the coefficients to
+     */
+    virtual void set_coefficients(
+        const std::vector<int16_t>& coeffs, const size_t chan) = 0;
+
+    /*! Get the window coefficients
+     *
+     * Return a vector with the current window coefficients for a given channel.
+     *
+     * \param chan The channel to retrieve the current window coefficients from
+     * \returns The vector of current window coefficients
+     */
+    virtual std::vector<int16_t> get_coefficients(const size_t chan) const = 0;
+};
+
+}} // namespace uhd::rfnoc
+