j3d1/esp-open-rtos
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

BME680 driver interface changes

Browse source 
- function bme680_force_measurement returns now a boolean
- function bme680_is_measuring returns now boolean
- function bme680_get_measurement_duration added
- heating profiles implemented
- example for heating profiles added
This commit is contained in:
Gunar Schorcht 2017-10-27 17:15:50 +02:00
parent 1bd9364ebb
commit 5b90f0ef58
9 changed files with 831 additions and 422 deletions
Download patch file Download diff file Expand all files Collapse all files

50
examples/bme680/bme680_one_sensor/bme680_one_sensor.c
View file

@ -56,28 +56,30 @@ static bme680_sensor_t* sensor;
void user_task(void *pvParameters)
{
bme680_values_float_t values;
int32_t duration;
TickType_t last_wakeup = xTaskGetTickCount();
// as long as sensor configuration isn't changed, duration is constant
uint32_t duration = bme680_get_measurement_duration(sensor);
while (1)
{
{
// trigger the sensor to start one TPHG measurement cycle
duration = bme680_force_measurement (sensor);
if (bme680_force_measurement (sensor))
{
// passive waiting until measurement results are available
vTaskDelay (duration);
// passive waiting until measurement results are available
if (duration > 0) vTaskDelay (duration);
// busy waiting until measurement results are available
// while (bme680_is_measuring (sensor) > 0) ;
// get the results and do something with them
if (bme680_get_results_float (sensor, &values))
printf("%.3f BME680 Sensor: %.2f °C, %.2f %%, %.2f hPa, %.2f Ohm\n",
(double)sdk_system_get_time()*1e-3,
values.temperature, values.humidity,
values.pressure, values.gas_resistance);
// alternatively: busy waiting until measurement results are available
// while (bme680_is_measuring (sensor)) ;
// get the results and do something with them
if (bme680_get_results_float (sensor, &values))
printf("%.3f BME680 Sensor: %.2f °C, %.2f %%, %.2f hPa, %.2f Ohm\n",
(double)sdk_system_get_time()*1e-3,
values.temperature, values.humidity,
values.pressure, values.gas_resistance);
}
// passive waiting until 1 second is over
vTaskDelayUntil(&last_wakeup, 1000 / portTICK_PERIOD_MS);
}
@ -93,7 +95,6 @@ void user_init(void)
/** -- MANDATORY PART -- */
#ifdef SPI_USED
// Init the sensor connected either to SPI.
sensor = bme680_init_sensor (SPI_BUS, 0, SPI_CS_GPIO);
@ -112,18 +113,19 @@ void user_init(void)
/** -- OPTIONAL PART -- */
// Changes the oversampling rates (default os_1x) to 4x oversampling
// for temperature and 2x oversampling for humidity. Pressure
// measurement is skipped in this example.
// Changes the oversampling rates to 4x oversampling for temperature
// and 2x oversampling for humidity. Pressure measurement is skipped.
bme680_set_oversampling_rates(sensor, osr_4x, osr_none, osr_2x);
// Change the IIR filter size (default iir_size_3) for temperature and
// and pressure to 7.
// Change the IIR filter size for temperature and pressure to 7.
bme680_set_filter_size(sensor, iir_size_7);
// Change the heaeter profile (default 320 degree Celcius for 150 ms)
// to 200 degree Celcius for 100 ms.
bme680_set_heater_profile (sensor, 320, 150);
// Change the heater profile 0 to 200 degree Celcius for 100 ms.
bme680_set_heater_profile (sensor, 0, 200, 100);
bme680_use_heater_profile (sensor, 0);
// Set ambient temperature to 10 degree Celsius
bme680_set_ambient_temperature (sensor, 10);
}
}