Diff: targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_K82F/trng_api.c

Revision:

167:e84263d55307

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_K82F/trng_api.c	Wed Jun 21 17:46:44 2017 +0100
@@ -0,0 +1,52 @@
+/*
+ *  Hardware entropy collector for the K66F, using Freescale's RNGA
+ *
+ *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  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.
+ *
+ */
+
+/*
+ * Reference: "K66 Sub-Family Reference Manual, Rev. 2", chapter 38
+ */
+
+#include <stdlib.h>
+#include "cmsis.h"
+#include "fsl_trng.h"
+#include "trng_api.h"
+
+void trng_init(trng_t *obj)
+{
+    (void)obj;
+    trng_config_t trngConfig;
+    TRNG_GetDefaultConfig(&trngConfig);
+    TRNG_Init(TRNG0, &trngConfig);
+}
+
+void trng_free(trng_t *obj)
+{
+    (void)obj;
+    TRNG_Deinit(TRNG0);
+}
+
+int trng_get_bytes(trng_t *obj, uint8_t *output, size_t length, size_t *output_length)
+{
+    (void)obj;
+
+    if(TRNG_GetRandomData(TRNG0, output, length) != kStatus_Success) return -1;
+    *output_length = length;
+
+    return 0;
+}