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Code style fix

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This commit is contained in:
adamdunkels 2009-12-05 11:26:20 +00:00
parent 9ec2b64008
commit 6815e2a53f
1 changed files with 29 additions and 21 deletions
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50
core/dev/ds2411.c
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@ -28,7 +28,7 @@
* *
* This file is part of the Contiki operating system. * This file is part of the Contiki operating system.
* *
* @(#)$Id: ds2411.c,v 1.3 2009/06/23 13:12:37 joxe Exp $ * @(#)$Id: ds2411.c,v 1.4 2009/12/05 11:26:20 adamdunkels Exp $
*/ */
/* /*
* Device driver for the Dallas Semiconductor DS2411 chip. Heavily * Device driver for the Dallas Semiconductor DS2411 chip. Heavily
@ -115,7 +115,7 @@ unsigned char ds2411_id[8];
#define tH 480 #define tH 480
#define tI 70 #define tI 70
#define tJ 410 #define tJ 410
/*---------------------------------------------------------------------------*/
static int static int
owreset(void) owreset(void)
{ {
@ -128,13 +128,13 @@ owreset(void)
udelay(tJ); udelay(tJ);
return result; return result;
} }
/*---------------------------------------------------------------------------*/
static void static void
owwriteb(unsigned byte) owwriteb(unsigned byte)
{ {
int i = 7; int i = 7;
do { do {
if (byte & 0x01) { if(byte & 0x01) {
OUTP_0(); OUTP_0();
udelay_tA(); udelay_tA();
OUTP_1(); /* Releases the bus */ OUTP_1(); /* Releases the bus */
@ -145,13 +145,14 @@ owwriteb(unsigned byte)
OUTP_1(); /* Releases the bus */ OUTP_1(); /* Releases the bus */
udelay(tD); udelay(tD);
} }
if (i == 0) if(i == 0) {
return; return;
}
i--; i--;
byte >>= 1; byte >>= 1;
} while (1); } while(1);
} }
/*---------------------------------------------------------------------------*/
static unsigned static unsigned
owreadb(void) owreadb(void)
{ {
@ -162,31 +163,34 @@ owreadb(void)
udelay_tA(); udelay_tA();
OUTP_1(); /* Releases the bus */ OUTP_1(); /* Releases the bus */
udelay(tE); udelay(tE);
if (INP()) if(INP()) {
result |= 0x80; /* LSbit first */ result |= 0x80; /* LSbit first */
}
udelay(tF); udelay(tF);
if (i == 0) if(i == 0) {
return result; return result;
}
i--; i--;
result >>= 1; result >>= 1;
} while (1); } while(1);
} }
/*---------------------------------------------------------------------------*/
/* Polynomial ^8 + ^5 + ^4 + 1 */ /* Polynomial ^8 + ^5 + ^4 + 1 */
static unsigned static unsigned
crc8_add(unsigned acc, unsigned byte) crc8_add(unsigned acc, unsigned byte)
{ {
int i; int i;
acc ^= byte; acc ^= byte;
for (i = 0; i < 8; i++) for(i = 0; i < 8; i++) {
if (acc & 1) if(acc & 1) {
acc = (acc >> 1) ^ 0x8c; acc = (acc >> 1) ^ 0x8c;
else } else {
acc >>= 1; acc >>= 1;
}
}
return acc; return acc;
} }
/*---------------------------------------------------------------------------*/
int int
ds2411_init() ds2411_init()
{ {
@ -195,7 +199,7 @@ ds2411_init()
PIN_INIT(); PIN_INIT();
if (owreset() == 0) { /* Something pulled down 1-wire. */ if(owreset() == 0) { /* Something pulled down 1-wire. */
/* /*
* Read MAC id with interrupts disabled. * Read MAC id with interrupts disabled.
*/ */
@ -203,18 +207,21 @@ ds2411_init()
owwriteb(0x33); /* Read ROM command. */ owwriteb(0x33); /* Read ROM command. */
family = owreadb(); family = owreadb();
/* We receive 6 bytes in the reverse order, LSbyte first. */ /* We receive 6 bytes in the reverse order, LSbyte first. */
for (i = 7; i >= 2; i--) for(i = 7; i >= 2; i--) {
ds2411_id[i] = owreadb(); ds2411_id[i] = owreadb();
}
crc = owreadb(); crc = owreadb();
splx(s); splx(s);
/* Verify family and that CRC match. */ /* Verify family and that CRC match. */
if (family != 0x01) if(family != 0x01) {
goto fail; goto fail;
}
acc = crc8_add(0x0, family); acc = crc8_add(0x0, family);
for (i = 7; i >= 2; i--) for(i = 7; i >= 2; i--) {
acc = crc8_add(acc, ds2411_id[i]); acc = crc8_add(acc, ds2411_id[i]);
if (acc == crc) { }
if(acc == crc) {
#ifdef CONTIKI_TARGET_SKY #ifdef CONTIKI_TARGET_SKY
/* 00:12:75 Moteiv # Moteiv Corporation */ /* 00:12:75 Moteiv # Moteiv Corporation */
ds2411_id[0] = 0x00; ds2411_id[0] = 0x00;
@ -229,3 +236,4 @@ ds2411_init()
memset(ds2411_id, 0x0, sizeof(ds2411_id)); memset(ds2411_id, 0x0, sizeof(ds2411_id));
return 0; /* Fail! */ return 0; /* Fail! */
} }
/*---------------------------------------------------------------------------*/