From 8ab3ad3b63504faf36e8df688d236d9274625d24 Mon Sep 17 00:00:00 2001
From: f4exb <f4exb06@gmail.com>
Date: Tue, 5 Sep 2017 15:06:40 +0200
Subject: [PATCH] PlutoSDR: added read param method to device box

---
 devices/plutosdr/deviceplutosdrbox.cpp | 36 ++++++++++++++++++++++++++
 devices/plutosdr/deviceplutosdrbox.h   |  1 +
 2 files changed, 37 insertions(+)

diff --git a/devices/plutosdr/deviceplutosdrbox.cpp b/devices/plutosdr/deviceplutosdrbox.cpp
index c5c1d294d..5c58782b8 100644
--- a/devices/plutosdr/deviceplutosdrbox.cpp
+++ b/devices/plutosdr/deviceplutosdrbox.cpp
@@ -106,6 +106,42 @@ void DevicePlutoSDRBox::set_params(DeviceType devType,
     }
 }
 
+bool DevicePlutoSDRBox::get_param(DeviceType devType, const std::string &param, std::string &value)
+{
+    struct iio_channel *chn = 0;
+    const char *attr = 0;
+    char valuestr[256];
+    int ret;
+    ssize_t nchars;
+
+    ret = iio_device_identify_filename(dev, param.c_str(), &chn, &attr);
+
+    if (ret)
+    {
+        std::cerr << "PlutoSDRDevice::get_param: Parameter not recognized: " << param << std::endl;
+        return false;
+    }
+
+    if (chn) {
+        nchars = iio_channel_attr_read(chn, attr, valuestr, 256);
+    } else if (iio_device_find_attr(dev, attr)) {
+        nchars = iio_device_attr_read(dev, attr, valuestr, 256);
+    } else {
+        nchars = iio_device_debug_attr_read(dev, attr, valuestr, 256);
+    }
+
+    if (nchars < 0)
+    {
+        std::cerr << "PlutoSDRDevice::get_param: Unable to read attribute " << param <<  ": " << nchars << std::endl;
+        return false;
+    }
+    else
+    {
+        value.assign(valuestr);
+        return true;
+    }
+}
+
 bool DevicePlutoSDRBox::openRx()
 {
     if (!m_chnRx0) {
diff --git a/devices/plutosdr/deviceplutosdrbox.h b/devices/plutosdr/deviceplutosdrbox.h
index 71c12ce3b..11cdb1bfb 100644
--- a/devices/plutosdr/deviceplutosdrbox.h
+++ b/devices/plutosdr/deviceplutosdrbox.h
@@ -39,6 +39,7 @@ public:
     bool isValid() const { return m_valid; }
 
     void set_params(DeviceType devType, const std::vector<std::string> &params);
+    bool get_param(DeviceType devType, const std::string &param, std::string &value);
     bool openRx();
     bool openTx();
     void closeRx();