RIOT/cpu/lpc11u34/periph/cpuid.c

/*
 * Copyright (C) 2015-2016 Freie Universität Berlin
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */

/**
 * @ingroup     cpu_lpc11u34
 * @{
 *
 * @file
 * @brief       Low-level CPUID driver implementation
 *
 * @author      Paul RATHGEB <paul.rathgeb@skynet.be>
 *
 * @}
 */

#include <stdint.h>
#include <string.h>

#include "periph/cpuid.h"

/* IAP base address */
#define IAP_ADDRESS 0x1FFF1FF1

void cpuid_get(void *id)
{
    uint32_t result[5];
    /* IAP command for UUID : 58 (UM10462 page 409) */
    uint32_t command = 58;
    /* Define pointer to function type */
    void (*iap)(uint32_t[], uint32_t[]);
    /* Set the function pointer */
    iap = (void (*)(uint32_t[], uint32_t[])) IAP_ADDRESS;
    /* Read UUID */
    iap(&command, result);
    memcpy(id, &result[1], CPUID_LEN);
}