added SAMA TRNG driver

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@11003 35acf78f-673a-0410-8e92-d51de3d6d3f4

os/hal/ports/SAMA/LLD/TRNGv1/driver.mk

@@ -0,0 +1,5 @@
+PLATFORMSRC +=$(CHIBIOS)/os/hal/ports/SAMA/LLD/TRNGv1/sama_trng_lld.c
+			
+			
+			
+PLATFORMINC +=$(CHIBIOS)/os/hal/ports/SAMA/LLD/TRNGv1

os/hal/ports/SAMA/LLD/TRNGv1/sama_trng_lld.c

@@ -0,0 +1,53 @@
+/*
+    ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio
+
+    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.
+*/
+#include "hal.h"
+#include "sama_trng_lld.h"
+
+
+void trng_lld_init(void) {
+   	  pmcEnableTRNG();
+}
+
+void trng_lld_start(void) {
+
+  TRNG->TRNG_CR = TRNG_CR_ENABLE | TRNG_CR_KEY_PASSWD;
+  //enable interrupt
+ // TRNG->TRNG_IER = TRNG_IER_DATRDY;
+
+
+}
+
+void trng_lld_getrandom(uint32_t * random) {
+
+	//generate a random every 84 clock cycles.
+  while (!(TRNG->TRNG_ISR & TRNG_ISR_DATRDY));
+
+  *random = TRNG->TRNG_ODATA;
+
+}
+
+void trng_lld_stop(void) {
+	//disable interrupt
+	//TRNG->TRNG_IDR = TRNG_IDR_DATRDY;
+	TRNG->TRNG_CR = TRNG_CR_KEY_PASSWD;
+	pmcDisableTRNG();
+}
+
+
+
+
+
+

os/hal/ports/SAMA/LLD/TRNGv1/sama_trng_lld.h

@@ -0,0 +1,36 @@
+/*
+    ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio
+
+    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.
+*/
+#ifndef HAL_LLD_SAMA_TRNG_H_
+#define HAL_LLD_SAMA_TRNG_H_
+
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern void trng_lld_init(void);
+extern void trng_lld_start(void);
+extern void trng_lld_stop(void);
+extern void trng_lld_getrandom(uint32_t * random);
+
+#ifdef __cplusplus
+}
+#endif
+
+
+
+#endif /* HAL_LLD_SAMA_TRNG_H_ */