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Code style fixes

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This commit is contained in:
adamdunkels 2008-07-08 08:23:47 +00:00
parent 8e5d255b5b
commit f58b387bd3
2 changed files with 104 additions and 90 deletions
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92
core/dev/sht11.c
View file

@ -26,7 +26,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)$Id: sht11.c,v 1.1 2007/10/22 12:19:58 nvt-se Exp $
* @(#)$Id: sht11.c,v 1.2 2008/07/08 08:23:47 adamdunkels Exp $
*/
/*
@ -57,7 +57,7 @@
/* This can probably be reduced to 250ns according to data sheet. */
#define delay_400ns() _NOP()
/*---------------------------------------------------------------------------*/
static void
sstart(void)
{
@ -75,20 +75,21 @@ sstart(void)
delay_400ns();
SCL_0();
}
/*---------------------------------------------------------------------------*/
static void
sreset(void)
{
int i;
SDA_1(); SCL_0();
for (i = 0; i < 9 ; i++) {
SDA_1();
SCL_0();
for(i = 0; i < 9 ; i++) {
SCL_1();
delay_400ns();
SCL_0();
}
sstart(); /* Start transmission, why??? */
}
/*---------------------------------------------------------------------------*/
/*
* Return true if we received an ACK.
*/
@ -99,11 +100,12 @@ swrite(unsigned _c)
int i;
int ret;
for (i = 0; i < 8; i++, c <<= 1) {
if (c & 0x80)
for(i = 0; i < 8; i++, c <<= 1) {
if(c & 0x80) {
SDA_1();
else
} else {
SDA_0();
}
SCL_1();
delay_400ns();
SCL_0();
@ -118,7 +120,7 @@ swrite(unsigned _c)
return ret;
}
/*---------------------------------------------------------------------------*/
static unsigned
sread(int send_ack)
{
@ -126,17 +128,19 @@ sread(int send_ack)
unsigned char c = 0x00;
SDA_1();
for (i = 0; i < 8; i++) {
for(i = 0; i < 8; i++) {
c <<= 1;
SCL_1();
delay_400ns();
if (SDA_IS_1)
if(SDA_IS_1) {
c |= 0x1;
}
SCL_0();
}
if (send_ack)
if(send_ack) {
SDA_0();
}
SCL_1();
delay_400ns();
SCL_0();
@ -145,7 +149,7 @@ sread(int send_ack)
return c;
}
/*---------------------------------------------------------------------------*/
#define CRC_CHECK
#ifdef CRC_CHECK
static unsigned char
@ -162,23 +166,24 @@ rev8bits(unsigned char v)
r <<= s; /* Shift when v's highest bits are zero */
return r;
}
/*---------------------------------------------------------------------------*/
/* BEWARE: Bit reversed CRC8 using polynomial ^8 + ^5 + ^4 + 1 */
static unsigned
crc8_add(unsigned acc, unsigned byte)
{
int i;
acc ^= byte;
for (i = 0; i < 8; i++)
if (acc & 0x80)
for(i = 0; i < 8; i++) {
if(acc & 0x80) {
acc = (acc << 1) ^ 0x31;
else
} else {
acc <<= 1;
}
}
return acc & 0xff;
}
#endif /* CRC_CHECK */
/*---------------------------------------------------------------------------*/
/*
* Power up the device. The device can be used after an additional
* 11ms waiting time.
@ -195,7 +200,7 @@ sht11_init(void)
SHT11_PxOUT &= ~(BV(SHT11_ARCH_SDA) | BV(SHT11_ARCH_SCL));
SHT11_PxDIR |= BV(SHT11_ARCH_PWR) | BV(SHT11_ARCH_SCL);
}
/*---------------------------------------------------------------------------*/
/*
* Power of device.
*/
@ -206,24 +211,26 @@ sht11_off(void)
SHT11_PxOUT &= ~(BV(SHT11_ARCH_SDA) | BV(SHT11_ARCH_SCL));
SHT11_PxDIR |= BV(SHT11_ARCH_PWR) | BV(SHT11_ARCH_SCL);
}
/*---------------------------------------------------------------------------*/
/*
* Only commands MEASURE_HUMI or MEASURE_TEMP!
*/
static unsigned
static unsigned int
scmd(unsigned cmd)
{
unsigned long n;
if (cmd != MEASURE_HUMI && cmd != MEASURE_TEMP)
if(cmd != MEASURE_HUMI && cmd != MEASURE_TEMP) {
return -1;
}
sstart(); /* Start transmission */
if (!swrite(cmd))
if(!swrite(cmd)) {
goto fail;
}
for (n = 0; n < 250000; n++)
if (!SDA_IS_1) {
for(n = 0; n < 250000; n++) {
if(!SDA_IS_1) {
unsigned t0, t1, rcrc;
t0 = sread(1);
t1 = sread(1);
@ -234,36 +241,38 @@ scmd(unsigned cmd)
crc = crc8_add(0x0, cmd);
crc = crc8_add(crc, t0);
crc = crc8_add(crc, t1);
if (crc != rev8bits(rcrc))
if(crc != rev8bits(rcrc)) {
goto fail;
}
}
#endif
return (t0 << 8) | t1;
}
}
fail:
sreset();
return -1;
}
/*---------------------------------------------------------------------------*/
/*
* Call may take up to 210ms.
*/
unsigned
unsigned int
sht11_temp(void)
{
return scmd(MEASURE_TEMP);
}
/*---------------------------------------------------------------------------*/
/*
* Call may take up to 210ms.
*/
unsigned
unsigned int
sht11_humidity(void)
{
return scmd(MEASURE_HUMI);
}
/*---------------------------------------------------------------------------*/
#if 0 /* But ok! */
unsigned
sht11_sreg(void)
@ -271,8 +280,9 @@ sht11_sreg(void)
unsigned sreg, rcrc;
sstart(); /* Start transmission */
if (!swrite(STATUS_REG_R))
if(!swrite(STATUS_REG_R)) {
goto fail;
}
sreg = sread(1);
rcrc = sread(0);
@ -294,16 +304,18 @@ sht11_sreg(void)
return -1;
}
#endif
/*---------------------------------------------------------------------------*/
#if 0
int
sht11_set_sreg(unsigned sreg)
{
sstart(); /* Start transmission */
if (!swrite(STATUS_REG_W))
if(!swrite(STATUS_REG_W)) {
goto fail;
if (!swrite(sreg))
}
if(!swrite(sreg)) {
goto fail;
}
return 0;
@ -312,14 +324,15 @@ sht11_set_sreg(unsigned sreg)
return -1;
}
#endif
/*---------------------------------------------------------------------------*/
#if 0
int
sht11_reset(void)
{
sstart(); /* Start transmission */
if (!swrite(RESET))
if(!swrite(RESET)) {
goto fail;
}
return 0;
@ -328,3 +341,4 @@ sht11_reset(void)
return -1;
}
#endif
/*---------------------------------------------------------------------------*/

8
core/dev/sht11.h
View file

@ -26,7 +26,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)$Id: sht11.h,v 1.1 2007/10/22 12:19:58 nvt-se Exp $
* @(#)$Id: sht11.h,v 1.2 2008/07/08 08:23:47 adamdunkels Exp $
*/
#ifndef SHT11_H
@ -35,9 +35,9 @@
void sht11_init(void);
void sht11_off(void);
unsigned sht11_temp(void);
unsigned sht11_humidity(void);
unsigned sht11_sreg(void);
unsigned int sht11_temp(void);
unsigned int sht11_humidity(void);
unsigned int sht11_sreg(void);
int sht11_set_sreg(unsigned);
/*