Merge pull request #523 from xmos/feature/xscope_fileio

xscope_fileio FreeRTOS example application

.gitmodules

@@ -16,3 +16,6 @@
 [submodule "frameworks/rtos"]
 	path = modules/rtos
 	url = [email protected]:xmos/fwk_rtos.git
+[submodule "modules/xscope_fileio/xscope_fileio"]
+	path = modules/xscope_fileio/xscope_fileio
+	url = [email protected]:xmos/xscope_fileio.git

doc/tutorials/freertos/examples/index.rst

@@ -11,7 +11,9 @@ Several FreeRTOS code examples are included to illustrate the fundamental tool f
    :includehidden:
 
    explorer_board.rst
+   xscope_fileio.rst
    device_control.rst
    dispatcher.rst
    l2_cache.rst
    iot.rst
+   xlink.rst

doc/tutorials/freertos/examples/xlink.rst

@@ -0,0 +1 @@
+.. include::  ../../../../examples/freertos/xlink/README.rst

doc/tutorials/freertos/examples/xscope_fileio.rst

@@ -0,0 +1 @@
+.. include::  ../../../../examples/freertos/xscope_fileio/README.rst

examples/examples.cmake

@@ -12,6 +12,20 @@ if(${CMAKE_SYSTEM_NAME} STREQUAL XCORE_XS3A)
     include(${CMAKE_CURRENT_LIST_DIR}/freertos/l2_cache/l2_cache.cmake)
     include(${CMAKE_CURRENT_LIST_DIR}/freertos/usb/usb.cmake)
     include(${CMAKE_CURRENT_LIST_DIR}/freertos/xlink/xlink.cmake)
+    include(${CMAKE_CURRENT_LIST_DIR}/freertos/xscope_fileio/xscope_fileio.cmake)
 else()
+    # Get the "version" value from the JSON element
+    file(READ settings.json JSON_STRING)
+    string(JSON SDK_VERSION GET ${JSON_STRING} ${IDX} version)
+
+    # Determine OS, set up install dir
+    if(${CMAKE_SYSTEM_NAME} STREQUAL Windows)
+        set(HOST_INSTALL_DIR "$ENV{USERPROFILE}\\.xmos\\SDK\\${SDK_VERSION}\\bin")
+    else()
+        set(HOST_INSTALL_DIR "/opt/xmos/SDK/${SDK_VERSION}/bin")
+    endif()
+
     add_subdirectory(${CMAKE_CURRENT_LIST_DIR}/freertos/device_control/host)
+    add_subdirectory(modules/xscope_fileio/xscope_fileio/host)
+    install(TARGETS xscope_host_endpoint DESTINATION ${HOST_INSTALL_DIR})
 endif()

examples/freertos/xlink/README.rst

@@ -1,9 +1,13 @@
-##############
+#####
 XLINK
-##############
+#####
 
 This example application demonstrates the `AN01024 <https://www.xmos.ai/file/an01024-xconnect-dynamic-configuration-demo-sw/>`_ application note in FreeRTOS on XCORE AI.
 
+.. note::
+
+  This example application required XTC Tools version 15.2.0 or newer.
+
 **********************
 Preparing the hardware
 **********************
@@ -145,4 +149,5 @@ Payloads match to ID per the table below:
      - timeouts in the last second
 
 .. note::
+
     Data rates are highly dependant on the electrical characteristics of the physical connection.  Refer to `xCONNECT Architecture <https://www.xmos.ai/file/xconnect-architecture/>`_ for more information.

examples/freertos/xlink/src/app_conf.h

@@ -11,6 +11,7 @@
 #define appconfINTER_DELAY 2
 #define appconfINTRA_DELAY 3
 
+
 #define appconfRX_DIRECTION 0
 #define appconfRX_NODE_ID 0x20
 #define appconfRX_DEBUG_I2C_SLAVE_ADDR 0xc
@@ -33,8 +34,8 @@
 #define appconfI2C_INTERRUPT_CORE               0 /* Must be kept off I/O cores. */
 
 /* I/O and interrupt cores for Tile 1 */
-#ifndef appconfXLINK_RX_IO_CORE     1  /* Must be kept off core 0 with the RTOS tick ISR */
-#ifndef appconfXLINK_TX_IO_CORE     1  /* Must be kept off core 0 with the RTOS tick ISR */
+#define appconfXLINK_RX_IO_CORE     1  /* Must be kept off core 0 with the RTOS tick ISR */
+#define appconfXLINK_TX_IO_CORE     1  /* Must be kept off core 0 with the RTOS tick ISR */
 
 /* Task Priorities */
 #define appconfSTARTUP_TASK_PRIORITY            ( configMAX_PRIORITIES - 1 )

examples/freertos/xlink/xlink.cmake

@@ -1,3 +1,42 @@
+function(check_tools_version)
+    # Run xcc --version
+    execute_process(
+        COMMAND xcc --version
+        OUTPUT_VARIABLE XCC_VERSION_OUTPUT_STRING
+    )
+    # Split output into lines
+    string(REPLACE "\n" ";" XCC_VERSION_OUTPUT_LINES ${XCC_VERSION_OUTPUT_STRING})
+    # Get second line
+    list(GET XCC_VERSION_OUTPUT_LINES 1 XCC_VERSION_LINE)
+    message(STATUS ${XCC_VERSION_LINE})
+    # Parse version fields
+    string(SUBSTRING ${XCC_VERSION_LINE} 13 10 XCC_SEMVER)
+    string(REPLACE "." ";" XCC_SEMVER_FIELDS ${XCC_SEMVER})
+    list(LENGTH XCC_SEMVER_FIELDS XCC_SEMVER_FIELDS_LENGTH)
+    if (${XCC_SEMVER_FIELDS_LENGTH} EQUAL "3")
+        list(GET XCC_SEMVER_FIELDS 0 XCC_VERSION_MAJOR)
+        list(GET XCC_SEMVER_FIELDS 1 XCC_VERSION_MINOR)
+        list(GET XCC_SEMVER_FIELDS 2 XCC_VERSION_PATCH)
+        # Set XTC version env variables
+        set(XTC_VERSION_MAJOR ${XCC_VERSION_MAJOR} PARENT_SCOPE)
+        set(XTC_VERSION_MINOR ${XCC_VERSION_MINOR} PARENT_SCOPE)
+        set(XTC_VERSION_PATCH ${XCC_VERSION_PATCH} PARENT_SCOPE)
+    else()
+        # Unable to determine the version. Return 15.1.0 and hope for the best
+        # Note, 15.1.0 had a bug where the version was missing
+        set(XTC_VERSION_MAJOR "15" PARENT_SCOPE)
+        set(XTC_VERSION_MINOR "1" PARENT_SCOPE)
+        set(XTC_VERSION_PATCH "0" PARENT_SCOPE)
+    endif()
+endfunction()
+
+check_tools_version()
+
+if ((XTC_VERSION_MAJOR LESS 15) OR (XTC_VERSION_MINOR LESS 2))
+    message(WARNING "XTC Tools version 15.2.0 or newer required for FreeRTOS xlink example")
+    return()
+endif()
+
 #**********************
 # Gather Sources
 #**********************

examples/freertos/xscope_fileio/README.rst

@@ -0,0 +1,141 @@
+###############
+XSCOPE File I/O
+###############
+
+This FreeRTOS example application reads a WAV file from the host over an XSCOPE server, propagates the data through multiple threads across both tiles, and then writes the output to a WAV file on the host PC, also over an XSCOPE server.
+
+.. image:: images/xscope_fileio_functional_diagram.png
+    :align: left
+
+The 3-stage pipeline in the example covers both XCORE tiles. Stage #1 and Stage #2 run on tile[1], while Stage #3 runs on tile[0].
+
+Stages #1 and #2 are implemented in the functions `stage_1` and `stage_2` which can be found in the file ``src\data_pipeline\src\data_pipeline_tile1.c``.  In this example, both stages apply a fixed gain to the PCM audio samples.  In `stage_1`, preemption is disabled with the `rtos_interrupt_mask_all()` function to insure the FreeRTOS kernel does not interrupt the task and perform a context switch during a performance critical code section.  `stage_2` is a typical FreeRTOS task which can be preempted.  However, this example is rather simple so, instead of leaving a context switch up to chance, the `stage_2` function periodically yields to the FreeRTOS kernel - emulating a context switch.
+
+Both the `stage_1` and `stage_2` functions have been instrumented with a stopwatch-like timer to measure the time spent applying the fixed gain.  
+
+Stage #3 is implemented in the function `stage_3` which can be found in the file ``src\data_pipeline\src\data_pipeline_tile0.c``.  In this example, Stage 3 does nothing.  It is provided to demonstrate a multi-tile pipeline.  
+
+The example application input file name is hard-coded to `in.wav` and the output file file name is hard-coded to `out.wav`.  Running the application can be wrapped in a simple script if alternative file names are desired.  Simply copy your file to `in.wav`, run the applications, then copy `out.wav` to you preferred output file name.
+
+The input file sample rate must be 16 KHz, 32 bits per sample. 
+
+This example is already configured to link with the `XMOS vectorized math library <https://www.xmos.ai/documentation/XM-014660-LATEST/html/modules/core/modules/xs3_math/lib_xs3_math/doc/index.html>`_.  Users wishing to take advantage of the vector processing unit (VPU) on the XMOS XS3 architecture can use this example application as a starting point.
+
+******************
+Supported Hardware
+******************
+
+This example is supported on the XCORE-AI-EXPLORER board.
+
+*********************
+Building the Firmware
+*********************
+
+Run the following commands in the root folder to build the embedded application using the XTC Toolchain:
+
+Linux or Mac
+------------
+
+.. code-block:: console
+
+    cmake -B build -DCMAKE_TOOLCHAIN_FILE=xmos_cmake_toolchain/xs3a.cmake
+    cd build
+    make example_freertos_xscope_fileio
+
+Windows
+-------
+
+Before building the embedded application, you may need to add the path to nmake to your PATH variable.
+
+.. code-block:: console
+
+    set PATH=%PATH%;<path-to-nmake>
+
+To build the embedded application:
+
+.. code-block:: console
+
+    cmake -G "NMake Makefiles" -B build -DCMAKE_TOOLCHAIN_FILE=xmos_cmake_toolchain/xs3a.cmake
+    cd build
+    nmake example_freertos_xscope_fileio
+
+*********************
+Building the Host App
+*********************
+
+Run the following commands in the root folder to build the host application using your native x86 Toolchain:
+
+.. note::
+
+    Permissions may be required to install the host applications.
+
+Linux or Mac
+------------
+
+.. code-block:: console
+
+    cmake -B build_host
+    cd build_host
+    make xscope_host_endpoint
+    make install
+
+The host application, `xscope_host_endpoint`, will be installed at `/opt/xmos/SDK/<sdk version>/bin/`, and may be moved if desired.  You may wish to add this directory to your `PATH` variable.
+
+Windows
+-------
+
+Before building the host application, you will need to add the path to the XTC Tools to your environment.
+
+.. code-block:: console
+
+    set "XMOS_TOOL_PATH=<path-to-xtc-tools>"
+
+Then build the host application:
+
+.. code-block:: console
+
+    cmake -G "NMake Makefiles" -B build_host
+    cd build_host
+    nmake xscope_host_endpoint
+    nmake install
+
+The host application, `xscope_host_endpoint.exe`, will be install at `<USERPROFILE>\.xmos\SDK\<sdk version>\bin\`, and may be moved if desired.  You may wish to add this directory to your `PATH` variable.
+
+********************
+Running the Firmware
+********************
+
+From the build folder run:
+
+Linux or Mac
+------------
+
+.. code-block:: console
+
+    make run_example_freertos_xscope_fileio
+
+In a second console, run the host xscope server:
+
+.. code-block:: console
+
+    ./xscope_host_endpoint 12345
+
+Windows
+-------
+
+.. code-block:: console
+
+    nmake run_example_freertos_xscope_fileio
+
+
+Before running the host application, you may need to add the location of the `xscope_endpoint.dll` to your PATH.
+
+.. code-block:: console
+
+    set PATH=%PATH%;<path-to-xscope-endpoint-dll>
+
+In a second console, run the host xscope server:
+
+.. code-block:: console
+
+    xscope_host_endpoint.exe 12345

examples/freertos/xscope_fileio/XCORE-AI-EXPLORER.xn

@@ -0,0 +1,109 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Network xmlns="http://www.xmos.com"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://www.xmos.com http://www.xmos.com">
+  <Type>Board</Type>
+  <Name>xcore.ai Explorer Kit</Name>
+
+  <Declarations>
+    <Declaration>tileref tile[2]</Declaration>
+  </Declarations>
+
+  <Packages>
+    <Package id="0" Type="XS3-UnA-1024-FB265">
+      <Nodes>
+        <Node Id="0" InPackageId="0" Type="XS3-L16A-1024" Oscillator="24MHz" SystemFrequency="600MHz" ReferenceFrequency="100MHz">
+          <Boot>
+            <Source Location="bootFlash"/>
+          </Boot>
+          <Extmem sizeMbit="1024" Frequency="100MHz">
+            <!-- Attributes for Padctrl and Lpddr XML elements are as per equivalently named 'Node Configuration' registers in datasheet -->
+
+            <Padctrl clk="0x30" cke="0x30" cs_n="0x30" we_n="0x30" cas_n="0x30" ras_n="0x30" addr="0x30" ba="0x30" dq="0x31" dqs="0x31" dm="0x30"/>
+            <!--
+              Attributes all have the same meaning, which is:
+              [6] = Schmitt enable, [5] = Slew, [4:3] = drive strength, [2:1] = pull option, [0] = read enable
+
+              Therefore:
+              0x30: 8mA-drive, fast-slew output
+              0x31: 8mA-drive, fast-slew bidir
+            -->
+
+            <Lpddr emr_opcode="0x20" protocol_engine_conf_0="0x2aa"/>
+            <!--
+              Attributes have various meanings:
+              emr_opcode[7:5] = LPDDR drive strength to xcore.ai
+
+              protocol_engine_conf_0[23:21] = tWR clock count at the Extmem Frequency
+              protocol_engine_conf_0[20:15] = tXSR clock count at the Extmem Frequency
+              protocol_engine_conf_0[14:11] = tRAS clock count at the Extmem Frequency
+              protocol_engine_conf_0[10:0]  = tREFI clock count at the Extmem Frequency
+
+              Therefore:
+              0x20: Half drive strength
+              0x2aa: tREFI 7.79us, tRAS 0us, tXSR 0us, tWR 0us
+            -->
+          </Extmem>
+          <Tile Number="0" Reference="tile[0]">
+            <Port Location="XS1_PORT_1B" Name="PORT_SQI_CS"/>
+            <Port Location="XS1_PORT_1C" Name="PORT_SQI_SCLK"/>
+            <Port Location="XS1_PORT_4B" Name="PORT_SQI_SIO"/>
+
+            <Port Location="XS1_PORT_1N"  Name="PORT_I2C_SCL"/>
+            <Port Location="XS1_PORT_1O"  Name="PORT_I2C_SDA"/>
+
+            <Port Location="XS1_PORT_4C" Name="PORT_LEDS"/>
+            <Port Location="XS1_PORT_4D" Name="PORT_BUTTONS"/>
+
+            <Port Location="XS1_PORT_1I"  Name="WIFI_WIRQ"/>
+            <Port Location="XS1_PORT_1J"  Name="WIFI_MOSI"/>
+            <Port Location="XS1_PORT_4E"  Name="WIFI_WUP_RST_N"/>
+            <Port Location="XS1_PORT_4F"  Name="WIFI_CS_N"/>
+            <Port Location="XS1_PORT_1L"  Name="WIFI_CLK"/>
+            <Port Location="XS1_PORT_1M"  Name="WIFI_MISO"/>
+          </Tile>
+          <Tile Number="1" Reference="tile[1]">
+            <!-- Mic related ports -->
+            <Port Location="XS1_PORT_1G" Name="PORT_PDM_CLK"/>
+            <Port Location="XS1_PORT_1F" Name="PORT_PDM_DATA"/>
+
+            <!-- Audio ports -->
+            <Port Location="XS1_PORT_1D" Name="PORT_MCLK_IN"/>
+            <Port Location="XS1_PORT_1C" Name="PORT_I2S_BCLK"/>
+            <Port Location="XS1_PORT_1B" Name="PORT_I2S_LRCLK"/>
+            <Port Location="XS1_PORT_1A" Name="PORT_I2S_DAC_DATA"/>
+            <Port Location="XS1_PORT_1N" Name="PORT_I2S_ADC_DATA"/>
+            <Port Location="XS1_PORT_4A" Name="PORT_CODEC_RST_N"/>
+          </Tile>
+        </Node>
+      </Nodes>
+    </Package>
+  </Packages>
+  <Nodes>
+    <Node Id="2" Type="device:" RoutingId="0x8000">
+      <Service Id="0" Proto="xscope_host_data(chanend c);">
+        <Chanend Identifier="c" end="3"/>
+      </Service>
+    </Node>
+  </Nodes>
+  <Links>
+    <Link Encoding="2wire" Delays="5clk" Flags="XSCOPE">
+      <LinkEndpoint NodeId="0" Link="XL0"/>
+      <LinkEndpoint NodeId="2" Chanend="1"/>
+    </Link>
+  </Links>
+  <ExternalDevices>
+    <Device NodeId="0" Tile="0" Class="SQIFlash" Name="bootFlash" Type="S25FL116K" PageSize="256" SectorSize="4096" NumPages="16384">
+      <Attribute Name="PORT_SQI_CS" Value="PORT_SQI_CS"/>
+      <Attribute Name="PORT_SQI_SCLK"   Value="PORT_SQI_SCLK"/>
+      <Attribute Name="PORT_SQI_SIO"  Value="PORT_SQI_SIO"/>
+      <Attribute Name="QE_REGISTER" Value="flash_qe_location_status_reg_0"/>
+      <Attribute Name="QE_BIT" Value="flash_qe_bit_6"/>
+    </Device>
+  </ExternalDevices>
+  <JTAGChain>
+    <JTAGDevice NodeId="0"/>
+  </JTAGChain>
+
+</Network>
+

examples/freertos/xscope_fileio/diagrams/functional_diagram.drawio

@@ -0,0 +1 @@
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