mirror of
https://github.com/RIOT-OS/RIOT.git
synced 2024-12-29 04:50:03 +01:00
616ebf9cfb
The EDBG debugger on the `samr21-xpro` contains a unique 64 bit address intended to be used as a MAC address for the internal radio. This adds a driver to read that EUI-64 from the debugger, it should match with the MAC address printed on the label on the board.
54 lines
1.2 KiB
C
54 lines
1.2 KiB
C
/*
|
|
* Copyright (C) 2020 Benjamin Valentin
|
|
*
|
|
* 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 drivers_edbg_eui
|
|
*
|
|
* @{
|
|
* @file
|
|
* @brief Driver for getting a unique ID from the Atmel Embedded Debugger.
|
|
*
|
|
* @author Benjamin Valentin <benjamin.valentin@ml-pa.com>
|
|
*
|
|
* @}
|
|
*/
|
|
|
|
#include "edbg_eui.h"
|
|
#include "periph/i2c.h"
|
|
#include "net/l2util.h"
|
|
|
|
#ifndef EDBG_I2C_DEV
|
|
#define EDBG_I2C_DEV I2C_DEV(0)
|
|
#endif
|
|
|
|
#define EDBG_ADDR (0x28)
|
|
#define TOKEN_EUI64 (0xD2)
|
|
#define TOKEN_EXT (0xE1)
|
|
|
|
int edbg_get_eui64(eui64_t *addr)
|
|
{
|
|
int res = 0;
|
|
i2c_acquire(EDBG_I2C_DEV);
|
|
|
|
/* dummy read for another token - following edbg user manual, section 4.3.1
|
|
* only returns the EUI-64 once, this work-around works reliable though.
|
|
*/
|
|
if ((res = i2c_read_regs(EDBG_I2C_DEV, EDBG_ADDR, TOKEN_EXT, addr, 2, 0))) {
|
|
goto out;
|
|
}
|
|
|
|
/* EDBG provides an EUI-64 for the internal radio */
|
|
if ((res = i2c_read_regs(EDBG_I2C_DEV, EDBG_ADDR, TOKEN_EUI64, addr, sizeof(*addr), 0))) {
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
i2c_release(EDBG_I2C_DEV);
|
|
return res;
|
|
}
|