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SHT3x driver - small changes

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This commit is contained in:
Gunar Schorcht 2017-10-13 13:39:09 +02:00
parent 3fee4b8f0c
commit 6d0545837c
1 changed files with 16 additions and 19 deletions
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35
examples/sht3x/sht3x_one_sensor/sht3x_one_sensor.c
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@ -16,6 +16,8 @@
* | GPIO 4 (SDA) ------- SDA |
* +------------------------+ +----------+
*/
// #define SINGLE_SHOT_MODE
#include "espressif/esp_common.h"
#include "esp/uart.h"
@ -33,13 +35,11 @@
static sht3x_sensor_t* sensor; // sensor device data structure
// #define SINGLE_SHOT_MODE
#ifdef SINGLE_SHOT_MODE
/*
* User task that triggers measurements of sensor every 5 seconds. Due to
* power efficiency reasons, it uses the SHT3x *single_shot* and *vTaskDelay*
* to wait for measurement results.
* User task that triggers a measurement every 5 seconds. Due to
* power efficiency reasons, it uses the SHT3x *single_shot* and
* *vTaskDelay* to wait for measurement results.
*/
void user_task (void *pvParameters)
{
@ -78,23 +78,23 @@ void user_task (void *pvParameters)
{
sht3x_values_t values;
// start periodic measurement mode
// start periodic measurements with 1 measurement per second
sht3x_start_measurement (sensor, periodic_1mps);
// busy waiting until measurement results are available
// busy waiting until first measurement results are available
while (sht3x_is_measuring (sensor) > 0) ;
TickType_t last_wakeup = xTaskGetTickCount();
while (1)
{
// retrieve the values and do something with them
// get the values and do something with them
if (sht3x_get_results (sensor, &values))
printf("%.3f SHT3x Sensor: %.2f °C, %.2f %%\n",
(double)sdk_system_get_time()*1e-3,
values.temperature, values.humidity);
// passive waiting until 2 seconds are over
// passive waiting until 2 seconds (cycle time) are over
vTaskDelayUntil(&last_wakeup, 2000 / portTICK_PERIOD_MS);
}
}
@ -102,10 +102,6 @@ void user_task (void *pvParameters)
void user_init(void)
{
// Please note: Return values are not considered in this example for
// readability reasons. All functions return boolean and set an error
// code that allows effective error handling.
// Set UART Parameter
uart_set_baud(0, 115200);
@ -117,10 +113,11 @@ void user_init(void)
i2c_init(I2C_BUS, I2C_SCL_PIN, I2C_SDA_PIN, I2C_FREQ_100K);
// Create sensors
sensor = sht3x_init_sensor (I2C_BUS, SHT3x_ADDR_2);
// Create a user task that uses the sensor
xTaskCreate(user_task, "user_task", 256, NULL, 2, 0);
if ((sensor = sht3x_init_sensor (I2C_BUS, SHT3x_ADDR_2)))
{
// Create a user task that uses the sensor
xTaskCreate(user_task, "user_task", 256, NULL, 2, 0);
}
// That's it.
}