前端II接口兼容设备的分配

时间:2014-02-19 15:47:36

标签: redhawksdr

我在Centos 6.4(32位)操作系统上使用REDHAWK 1.9。

我的设备符合Tuner的FrontEnd(FE)II接口。符合FEII的设备的分配是通过结构(frontend_tuner_allocation)。 IDE似乎不允许在实现选项卡上定义此分配。

我看了REDHAWK UHD device usage。它描述了如何进行必要的连接,但我没有看到如何通过调谐器分配结构进行分配。

我见过示例(离线)在哪里进行此分配,分配结构必须手动编码到xml文件中。我在一个案例中看到这是在组件spd.xml文件中完成的。我有另一个例子,它是在波形中完成的。

示例1: 在组件spd.xml

<usesdevice id="DCE:11bafc63-d8ce-428b-8b4e-39cb96034e8c" type="usesDevice">
  <propertyref refid="DCE:cdc5ee18-7ceb-4ae6-bf4c-31f983179b4d" value="FRONTEND:TUNER"/>
  <structref refid="FRONTEND::tuner_allocation">
    <simpleref refid="FRONTEND::tuner_allocation::allocation_id" value="SimFE2TestSink"/>
    <simpleref refid="FRONTEND::tuner_allocation::center_frequency" value="857000000.0"/>
  </structref>
</usesdevice>

示例2: 在波形spd.xml

   <usesdevicedependencies>
    <usesdevice id="DCE:93a650f5-719f-4dc3-8143-fd438b94c19f" type="usesXX">
      <propertyref refid="DCE:cdc5ee18-7ceb-4ae6-bf4c-31f983179b4d" value="FRONTEND::TUNER"/>
      <structref refid="FRONTEND::tuner_allocation">
        <simpleref refid="FRONTEND::tuner_allocation::tuner_type" value="RX_DIGITIZER_CHANNELIZER"/>
        <simpleref refid="FRONTEND::tuner_allocation::allocation_id" value="XXDevice"/>
        <simpleref refid="FRONTEND::tuner_allocation::center_frequency" value="100000000"/>
        <simpleref refid="FRONTEND::tuner_allocation::bandwidth" value="128000"/>
        <simpleref refid="FRONTEND::tuner_allocation::sample_rate" value="256000"/>
        <simpleref refid="FRONTEND::tuner_allocation::group_id" value=""/>
        <simpleref refid="FRONTEND::tuner_allocation::rf_flow_id" value=""/>
      </structref>
    </usesdevice>
  </usesdevicedependencies>

分配FrontEnd Tuner的最佳方法是什么?

1 个答案:

答案 0 :(得分:1)

没有真正的“最佳”方式来分配前端调谐器设备。这实际上取决于哪种方式对您的特定场景最有意义。

您提供的两个示例是通过XML分配前端调谐器的有效方法,但是还有另一个选项(使用python)可以帮助澄清幕后发生的事情。

假设您的设备已在运行:

from ossie.utils import redhawk
from ossie.cf import CF

# Attach to the domain
domain = redhawk.attach("REDHAWK_DEV")

# Locate your FEI device
myFEIDevice = None
for device in domain.devices:
    if device.name == "myFEIDevice":
        myFEIDevice = device

# Sanity check
if not myFEIDevice:
    raise Exception("Unable to locate myFEIDevice!")

此时,您的FEI设备应该接受allocateCapacity(tunerRequestProps)来电:

from ossie.utils import uuid

# Setup tuning variables
allocationId = str(uuid.uuid4())
tunerType = "RX_DIGITIZER_CHANNELIZER"
centerFreq = 100e6
sampleRate = 48000.0
sampleRateTol = 10.0
bandwidth = 16000.0
bandwidthTol = 10.0
deviceControl = False
groupId = ""
rfFlowId = ""

# Setup allocation request properties
props = []
props.append(CF.DataType("FRONTEND::tuner_allocation::tuner_type", tunerType))
props.append(CF.DataType("FRONTEND::tuner_allocation::allocation_id", allocationId))
props.append(CF.DataType("FRONTEND::tuner_allocation::center_frequency", centerFreq))
props.append(CF.DataType("FRONTEND::tuner_allocation::bandwidth", bandwidth))
props.append(CF.DataType("FRONTEND::tuner_allocation::bandwidth_tolerance", bandwidthTol))
props.append(CF.DataType("FRONTEND::tuner_allocation::sample_rate", sampleRate))
props.append(CF.DataType("FRONTEND::tuner_allocation::sample_rate_tolerance", sampleRateTol))
props.append(CF.DataType("FRONTEND::tuner_allocation::device_control", deviceControl))
props.append(CF.DataType("FRONTEND::tuner_allocation::group_id", groupId))
props.append(CF.DataType("FRONTEND::tuner_allocation::rf_flow_id", rfFlowId))

# Setup tuner request struct properties
fe_alloc_props = {}
fe_alloc_props["FRONTEND::tuner_allocation"] = props

# Attempt to allocate your device
allocationResult = myFEIDevice.allocateCapacity(fe_alloc_props)

此时,如果分配成功,您应该看到分配请求现在在设备的frontend_tuner_status属性中表示