O-RAN E Maintenance Release contribution for ODULOW

[o-du/phy.git] / fapi_5g / source / utils / nr5g_fapi_snr_conversion.c

diff --git a/fapi_5g/source/utils/nr5g_fapi_snr_conversion.c b/fapi_5g/source/utils/nr5g_fapi_snr_conversion.c
new file mode 100644 (file)
index 0000000..0cd07ac
--- /dev/null
+++ b/fapi_5g/source/utils/nr5g_fapi_snr_conversion.c
@@ -0,0 +1,38 @@
+/******************************************************************************
+*
+*   Copyright (c) 2021 Intel.
+*
+*   Licensed under the Apache License, Version 2.0 (the "License");
+*   you may not use this file except in compliance with the License.
+*   You may obtain a copy of the License at
+*
+*       http://www.apache.org/licenses/LICENSE-2.0
+*
+*   Unless required by applicable law or agreed to in writing, software
+*   distributed under the License is distributed on an "AS IS" BASIS,
+*   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+*   See the License for the specific language governing permissions and
+*   limitations under the License.
+*
+*******************************************************************************/
+
+/**
+ * @file This file consist of SNR converter from IntelAPI to FAPI.
+ *
+ **/
+
+#include "nr5g_fapi_snr_conversion.h"
+
+#include <math.h>
+
+#include "gnb_l1_l2_api.h"
+
+uint8_t nr5g_fapi_convert_snr_iapi_to_fapi(const int16_t snr)
+{
+    double temp = (double)snr / SINR_STEP_SIZE;
+    if (temp < 0)
+    {
+        return 2 * ((uint8_t)floor(temp) & 0x003F);
+    }
+    return (2 * ((uint8_t)ceil(temp) & 0x003F)) + 128;
+}