added random number generator driver and stuff

source/firmware/arch/stm32f4xx/driver/include/stm32f4_rng.h

@@ -0,0 +1,25 @@
+/*
+ * stm32f4_rng.h
+ *
+ *  Created on: Aug 30, 2016
+ *      Author: tkl
+ */
+
+#ifndef SOURCE_FIRMWARE_ARCH_STM32F4XX_INCLUDE_STM32F4_RNG_H_
+#define SOURCE_FIRMWARE_ARCH_STM32F4XX_INCLUDE_STM32F4_RNG_H_
+
+struct stm32f4_rng {
+	RNG_HandleTypeDef *rng_handle;
+};
+
+int stm32f4_rng_open(const void *this);
+int stm32f4_rng_close(const void *this);
+unsigned int stm32f4_rng_read(const void *this);
+
+static const struct rng_fp rng_fp = {
+		.open = stm32f4_rng_open,
+		.close = stm32f4_rng_close,
+		.read = stm32f4_rng_read,
+};
+
+#endif /* SOURCE_FIRMWARE_ARCH_STM32F4XX_INCLUDE_STM32F4_RNG_H_ */