drivers/cpu: add function to get CPU id/serial number

cpu/native/include/cpu-conf.h

@@ -57,4 +57,6 @@
 /* for nativenet */
 #define NATIVE_ETH_PROTO 0x1234
 
+#define CPUID_ID_LEN                    (4)
+
 #endif /* CPUCONF_H_ */

cpu/native/periph_cpuid.c

@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2014 Martin Lenders <mlenders@inf.fu-berlin.de>
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser General
+ * Public License. See the file LICENSE in the top level directory for more
+ * details.
+ */
+
+/**
+ * @addtogroup  driver_periph
+ * @{
+ *
+ * @file        cpuid.c
+ * @brief       Implementation
+ *
+ * @author      Martine Lenders <mlenders@inf.fu-berlin.de>
+ */
+
+#include <string.h>
+#include <stdint.h>
+
+#include "cpu-conf.h"
+#include "native_internal.h"
+
+#include "periph/cpuid.h"
+
+void cpuid_get(void *id)
+{
+    memset(id, 0xff, CPUID_ID_LEN);   /* Just in case _native_id is shorter
+                                         than CPUID_ID_LEN. */
+    memcpy(id, &(_native_id), sizeof(_native_id));
+}
+
+/**
+ * @}
+ */

drivers/include/periph/cpuid.h

@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2014 Martin Lenders <mlenders@inf.fu-berlin.de>
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser General
+ * Public License. See the file LICENSE in the top level directory for more
+ * details.
+ */
+
+/**
+ * @addtogroup  driver_periph
+ * @{
+ *
+ * @file        periph/cpuid.h
+ * @brief       Provides access the CPU's serial number
+ *
+ * @author      Martine Lenders <mlenders@inf.fu-berlin.de>
+ */
+
+#ifndef __PERIPH_CPUID_H_
+#define __PERIPH_CPUID_H_
+
+#include "cpu-conf.h"
+
+#if CPUID_ID_LEN
+/**
+ * @brief   Gets the serial number of the CPU.
+ *
+ * @param[out] id   The serial number of the CPU of length CPU_ID_LEN (must be
+ *                  defined in the CPU's cpu-conf.h)
+ */
+void cpuid_get(void *id);
+#endif /* CPUID_ID_LEN */
+
+#endif /* __PERIPH_CPUID_H_ */
+/**
+ * @}
+ */

tests/cpuid/Makefile

@@ -0,0 +1,6 @@
+export APPLICATION = test_cpu_id
+include ../Makefile.tests_common
+
+BOARD_WHITELIST := native
+
+include $(RIOTBASE)/Makefile.include

tests/cpuid/main.c

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2014 Freie Universität Berlin
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser General
+ * Public License. See the file LICENSE in the top level directory for more
+ * details.
+ */
+
+/**
+ * @ingroup tests
+ * @{
+ *
+ * @file
+ * @brief GET_CPU_ID() test application
+ *
+ * @author Martin Lenders <mlenders@inf.fu-berlin.de>
+ *
+ * @}
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+
+#include "cpu-conf.h"
+#include "periph/cpuid.h"
+
+#ifndef CPUID_ID_LEN
+#error "cpuid is not defined for the CPU type of this board"
+#endif
+
+int main(void)
+{
+    uint8_t id[CPUID_ID_LEN];
+
+    cpuid_get(id);
+
+    for (unsigned int i = 0; i < CPUID_ID_LEN; i++) {
+        printf("0x%02x ", id[i]);
+    }
+
+    printf("\n");
+
+    return 0;
+}