cpuid.c
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/*
* Copyright (C) 2015 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 driver_periph
* @{
*
* @file
* @brief Low-level CPUID driver implementation
*
* @author Paul RATHGEB <paul.rathgeb@skynet.be>
* @author Dinh Nguyen <nqdinhddt@gmail.com>
* @}
*/
#include <string.h>
#include <stdint.h>
#include "periph/cpuid.h"
#include "cpu_conf.h"
/**
* @name IAP base address
*/
#define IAP_ADDRESS 0x1FFF1FF1
void cpuid_get(void *id)
{
uint32_t result[5];
/* IAP command for UUID : 58 (UM10360 page 645) */
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);
if (result[0] == 0) {
memcpy(id, &result[1], CPUID_LEN);
}
else {
memset(id, 0xFF, CPUID_LEN);
}
}