Change backend policy to warning when error is not known

Author: RGerzaguet

Project.toml

@@ -1,7 +1,7 @@
 name = "AdalmPluto"
 uuid = "af34ca7c-e544-47d5-a6fe-72495f08728e"
 authors = ["Pierre Dénès <pdenes@enssat.fr> and Robin Gerzaguet <robin.gerzaguet@irisa.fr>"]
-version = "0.3.1"
+version = "0.3.2"
 
 [deps]
 Libdl = "8f399da3-3557-5675-b5ff-fb832c97cbdb"

src/AdalmPluto.jl

@@ -236,7 +236,8 @@ function scan(backend::String, deviceIndex=-1, doPrint=true)
     if ret < 0
         C_iio_context_info_list_free(info[]);
         C_iio_scan_context_destroy(scan_context);
-        error("iio_scan_context_get_info_list failed with error $ret :\n", C_iio_strerror(ret));
+        #error("iio_scan_context_get_info_list failed with error $ret :\n", C_iio_strerror(ret));
+        @warn "[$backend Backend] iio_scan_context_get_info_list failed with error $(C_iio_strerror(ret))"
         uri = [""]
     elseif ret == 0
         (doPrint) && (@info "No $backend device found");