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Merge pull request #702 from g-oikonomou/ieee-addr-fixes

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Fix incorrect IEEE address byte re-ordering
This commit is contained in:
George Oikonomou 2014-06-11 09:54:52 +01:00
parent 48196bace3 9d7c3b9866
commit 3552376324
2 changed files with 48 additions and 6 deletions
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32
cpu/cc2538/ieee-addr.c
View file

@ -49,10 +49,36 @@ ieee_addr_cpy_to(uint8_t *dst, uint8_t len)
memcpy(dst, &ieee_addr_hc[8 - len], len);
} else {
/* Reading from Info Page, we need to invert byte order */
/*
* By default, we assume that the IEEE address is stored on flash using
* little-endian byte order.
*
* However, some SoCs ship with a different byte order, whereby the first
* four bytes are flipped with the four last ones.
*
* Using this address as an example: 00 12 4B 00 01 02 03 04
* We expect it stored as: 04 03 02 01 00 4B 12 00
* But it is also possible to encounter: 00 4B 12 00 04 03 02 01
*
* Thus: read locations [3, 2, 1] and if we encounter the TI OUI, flip the
* order of the two 4-byte sequences. Each of the 4-byte sequences is still
* little-endian.
*/
int i;
for(i = 0; i < len; i++) {
dst[i] = ((uint8_t *)IEEE_ADDR_LOCATION)[len - 1 - i];
uint8_t oui_ti[3] = IEEE_ADDR_OUI_TI;
if(((uint8_t *)IEEE_ADDR_LOCATION)[3] == oui_ti[0]
&& ((uint8_t *)IEEE_ADDR_LOCATION)[2] == oui_ti[1]
&& ((uint8_t *)IEEE_ADDR_LOCATION)[1] == oui_ti[2]) {
for(i = 0; i < len / 2; i++) {
dst[i] = ((uint8_t *)IEEE_ADDR_LOCATION)[len / 2 - 1 - i];
}
for(i = 0; i < len / 2; i++) {
dst[i + len / 2] = ((uint8_t *)IEEE_ADDR_LOCATION)[len - 1 - i];
}
} else {
for(i = 0; i < len; i++) {
dst[i] = ((uint8_t *)IEEE_ADDR_LOCATION)[len - 1 - i];
}
}
}

22
cpu/cc2538/ieee-addr.h
View file

@ -49,11 +49,27 @@
#include <stdint.h>
/*---------------------------------------------------------------------------*/
/**
* \name IEEE address locations
* \name TI OUI
* @{
*/
#define IEEE_ADDR_LOCATION_PRIMARY 0x00280028 /**< IEEE address location */
#define IEEE_ADDR_LOCATION_SECONDARY 0x0027FFCC /**< IEEE address location */
#define IEEE_ADDR_OUI_TI { 0x00, 0x12, 0x4B } /**< TI OUI */
/** @} */
/*---------------------------------------------------------------------------*/
/**
* \name IEEE address locations
*
* The address of the secondary location can be configured by the platform
* or example
*
* @{
*/
#define IEEE_ADDR_LOCATION_PRIMARY 0x00280028 /**< Primary IEEE address location */
#ifdef IEEE_ADDR_CONF_LOCATION_SECONDARY
#define IEEE_ADDR_LOCATION_SECONDARY IEEE_ADDR_CONF_LOCATION_SECONDARY
#else
#define IEEE_ADDR_LOCATION_SECONDARY 0x0027FFCC /**< Secondary IEEE address location */
#endif
/** @} */
/*---------------------------------------------------------------------------*/
/**