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drivers: sht11: use xtimer

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This commit is contained in:
Kaspar Schleiser 2015-08-14 13:30:49 +02:00
parent cbd7d42e06
commit 4445d940ea
3 changed files with 30 additions and 26 deletions
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4
Makefile.dep
View File

@ -354,3 +354,7 @@ endif
ifneq (,$(filter mpu9150,$(USEMODULE)))
USEMODULE += xtimer
endif
ifneq (,$(filter sht11,$(USEMODULE)))
USEMODULE += xtimer
endif

4
drivers/include/sht11.h
View File

@ -37,9 +37,9 @@ extern "C" {
#define SHT11_RESET (0x1E) //000 1111 0
/* time to wait after toggling the data line */
#define SHT11_DATA_WAIT (HWTIMER_TICKS(1))
#define SHT11_DATA_WAIT (1)
/* time to wait after toggling the clock line */
#define SHT11_CLK_WAIT (HWTIMER_TICKS(1))
#define SHT11_CLK_WAIT (1)
/* set measurement timeout to 1 second */
#define SHT11_MEASURE_TIMEOUT (1000)

48
drivers/sht11/sht11.c
View File

@ -25,7 +25,7 @@
#include <stdio.h>
#include <stdint.h>
#include "hwtimer.h"
#include "xtimer.h"
#include "mutex.h"
#include "sht11.h"
#include "sht11-board.h"
@ -84,9 +84,9 @@ mutex_t sht11_mutex = MUTEX_INIT;
static inline void clk_signal(void)
{
SHT11_SCK_HIGH;
hwtimer_wait(SHT11_CLK_WAIT);
xtimer_usleep(SHT11_CLK_WAIT);
SHT11_SCK_LOW;
hwtimer_wait(SHT11_CLK_WAIT);
xtimer_usleep(SHT11_CLK_WAIT);
}
/*---------------------------------------------------------------------------*/
@ -101,11 +101,11 @@ static uint8_t write_byte(uint8_t value)
for (i = 0; i < 8; i++) {
if (value & BIT7) {
SHT11_DATA_HIGH;
hwtimer_wait(SHT11_DATA_WAIT);
xtimer_usleep(SHT11_DATA_WAIT);
}
else {
SHT11_DATA_LOW;
hwtimer_wait(SHT11_DATA_WAIT);
xtimer_usleep(SHT11_DATA_WAIT);
}
/* trigger clock signal */
@ -117,7 +117,7 @@ static uint8_t write_byte(uint8_t value)
/* wait for ack */
SHT11_DATA_IN;
hwtimer_wait(SHT11_CLK_WAIT);
xtimer_usleep(SHT11_CLK_WAIT);
ack = SHT11_DATA;
clk_signal();
@ -131,13 +131,13 @@ static uint8_t read_byte(uint8_t ack)
uint8_t value = 0;
SHT11_DATA_IN;
hwtimer_wait(SHT11_DATA_WAIT);
xtimer_usleep(SHT11_DATA_WAIT);
/* read value bit by bit */
for (i = 0; i < 8; i++) {
value = value << 1;
SHT11_SCK_HIGH;
hwtimer_wait(SHT11_CLK_WAIT);
xtimer_usleep(SHT11_CLK_WAIT);
if (SHT11_DATA) {
/* increase data by one when DATA is high */
@ -145,7 +145,7 @@ static uint8_t read_byte(uint8_t ack)
}
SHT11_SCK_LOW;
hwtimer_wait(SHT11_CLK_WAIT);
xtimer_usleep(SHT11_CLK_WAIT);
}
/* send ack if necessary */
@ -153,11 +153,11 @@ static uint8_t read_byte(uint8_t ack)
if (ack) {
SHT11_DATA_LOW;
hwtimer_wait(SHT11_DATA_WAIT);
xtimer_usleep(SHT11_DATA_WAIT);
}
else {
SHT11_DATA_HIGH;
hwtimer_wait(SHT11_DATA_WAIT);
xtimer_usleep(SHT11_DATA_WAIT);
}
clk_signal();
@ -179,27 +179,27 @@ static void transmission_start(void)
/* set initial state */
SHT11_DATA_HIGH;
hwtimer_wait(SHT11_DATA_WAIT);
xtimer_usleep(SHT11_DATA_WAIT);
SHT11_SCK_LOW;
hwtimer_wait(SHT11_CLK_WAIT);
xtimer_usleep(SHT11_CLK_WAIT);
SHT11_SCK_HIGH;
hwtimer_wait(SHT11_CLK_WAIT);
xtimer_usleep(SHT11_CLK_WAIT);
SHT11_DATA_LOW;
hwtimer_wait(SHT11_DATA_WAIT);
xtimer_usleep(SHT11_DATA_WAIT);
SHT11_SCK_LOW;
hwtimer_wait(SHT11_CLK_WAIT);
xtimer_usleep(SHT11_CLK_WAIT);
SHT11_SCK_HIGH;
hwtimer_wait(SHT11_CLK_WAIT);
xtimer_usleep(SHT11_CLK_WAIT);
SHT11_DATA_HIGH;
hwtimer_wait(SHT11_DATA_WAIT);
xtimer_usleep(SHT11_DATA_WAIT);
SHT11_SCK_LOW;
hwtimer_wait(SHT11_CLK_WAIT);
xtimer_usleep(SHT11_CLK_WAIT);
}
/*---------------------------------------------------------------------------*/
static void connection_reset(void)
@ -211,9 +211,9 @@ static void connection_reset(void)
*/
uint8_t i;
SHT11_DATA_HIGH;
hwtimer_wait(SHT11_DATA_WAIT);
xtimer_usleep(SHT11_DATA_WAIT);
SHT11_SCK_LOW;
hwtimer_wait(SHT11_CLK_WAIT);
xtimer_usleep(SHT11_CLK_WAIT);
for (i = 0; i < 9; i++) {
clk_signal();
@ -231,7 +231,7 @@ static uint8_t measure(uint8_t *p_value, uint8_t *p_checksum, uint8_t mode)
transmission_start();
error = write_byte(mode);
hwtimer_wait(HWTIMER_TICKS(1000));
xtimer_usleep(1000);
/* wait untile sensor has finished measurement or timeout */
for (i = 0; (i < SHT11_MEASURE_TIMEOUT) && (!error); i++) {
@ -241,7 +241,7 @@ static uint8_t measure(uint8_t *p_value, uint8_t *p_checksum, uint8_t mode)
break;
}
hwtimer_wait(HWTIMER_TICKS(1000));
xtimer_usleep(1000);
}
error += ack;
@ -260,7 +260,7 @@ void sht11_init(void)
{
sht11_temperature_offset = 0;
SHT11_INIT;
hwtimer_wait(11 * HWTIMER_TICKS(1000));
xtimer_usleep(11 * 1000);
}
/*---------------------------------------------------------------------------*/
uint8_t sht11_read_status(uint8_t *p_value, uint8_t *p_checksum)