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Adapted to new SPI and CC2420 naming

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This commit is contained in:
nifi 2010-06-24 11:25:55 +00:00
parent f609cb0f7c
commit c44cf73e4f
1 changed files with 24 additions and 20 deletions
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42
core/dev/cc2420-aes.c
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@ -28,7 +28,7 @@
*
* This file is part of the Contiki operating system.
*
* $Id: cc2420-aes.c,v 1.4 2010/03/15 23:04:54 nifi Exp $
* $Id: cc2420-aes.c,v 1.5 2010/06/24 11:25:55 nifi Exp $
*/
/**
@ -39,33 +39,38 @@
*/
#include "contiki.h"
#include "dev/cc2420.h"
#include "dev/cc2420-aes.h"
#include "dev/cc2420_const.h"
#include "dev/spi.h"
#if defined(__AVR__)
#include <avr/io.h>
#elif defined(__MSP430__)
#include <io.h>
#endif
#define KEYLEN 16
#define MAX_DATALEN 16
#define CC2420_WRITE_RAM_REV(buffer,adr,count) \
do { \
uint8_t i; \
CC2420_SPI_ENABLE(); \
SPI_WRITE_FAST(0x80 | (adr & 0x7f)); \
SPI_WRITE_FAST((adr >> 1) & 0xc0); \
for(i = (count); i > 0; i--) { \
SPI_WRITE_FAST(((uint8_t*)(buffer))[i - 1]); \
} \
SPI_WAITFORTx_ENDED(); \
CC2420_SPI_DISABLE(); \
} while(0)
#define MIN(a,b) ((a) < (b)? (a): (b))
/*---------------------------------------------------------------------------*/
void
cc2420_aes_set_key(const uint8_t *key, int index)
{
uint16_t f;
switch(index) {
case 0:
FASTSPI_WRITE_RAM_BE(key, CC2420RAM_KEY0, KEYLEN, f);
CC2420_WRITE_RAM_REV(key, CC2420RAM_KEY0, KEYLEN);
break;
case 1:
FASTSPI_WRITE_RAM_BE(key, CC2420RAM_KEY1, KEYLEN, f);
CC2420_WRITE_RAM_REV(key, CC2420RAM_KEY1, KEYLEN);
break;
}
}
@ -74,18 +79,17 @@ cc2420_aes_set_key(const uint8_t *key, int index)
static void
cipher16(uint8_t *data, int len)
{
uint16_t f;
uint8_t status;
len = MIN(len, MAX_DATALEN);
FASTSPI_WRITE_RAM_LE(data, CC2420RAM_SABUF, len, f);
FASTSPI_STROBE(CC2420_SAES);
CC2420_WRITE_RAM(data, CC2420RAM_SABUF, len);
CC2420_STROBE(CC2420_SAES);
/* Wait for the encryption to finish */
do {
FASTSPI_UPD_STATUS(status);
CC2420_GET_STATUS(status);
} while(status & BV(CC2420_ENC_BUSY));
FASTSPI_READ_RAM_LE(data, CC2420RAM_SABUF, len, f);
CC2420_READ_RAM(data, CC2420RAM_SABUF, len);
}
/*---------------------------------------------------------------------------*/
void
@ -94,7 +98,7 @@ cc2420_aes_cipher(uint8_t *data, int len, int key_index)
int i;
uint16_t secctrl0;
FASTSPI_GETREG(CC2420_SECCTRL0, secctrl0);
CC2420_READ_REG(CC2420_SECCTRL0, secctrl0);
secctrl0 &= ~(CC2420_SECCTRL0_SAKEYSEL0 | CC2420_SECCTRL0_SAKEYSEL1);
@ -106,7 +110,7 @@ cc2420_aes_cipher(uint8_t *data, int len, int key_index)
secctrl0 |= CC2420_SECCTRL0_SAKEYSEL1;
break;
}
FASTSPI_SETREG(CC2420_SECCTRL0, secctrl0);
CC2420_WRITE_REG(CC2420_SECCTRL0, secctrl0);
for(i = 0; i < len; i = i + MAX_DATALEN) {
cipher16(data + i, MIN(len - i, MAX_DATALEN));