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

semaphore for SPI bus access removed from the driver, the user has to deal with concurrency

Browse source
This commit is contained in:
Gunar Schorcht 2018-01-06 15:31:03 +01:00
parent 37408659ca
commit 3158fec6db
4 changed files with 34 additions and 35 deletions
Download patch file Download diff file Expand all files Collapse all files

32
extras/bme680/README.md
View file

@ -378,10 +378,7 @@ Optionally, you could wish to set some measurement parameters. For details see t
```
if (sensor)
{
// Create a task that uses the sensor
xTaskCreate(user_task, "user_task", 256, NULL, 2, NULL);
/** -- OPTIONAL PART -- */
/** -- SENSOR CONFIGURATION PART (optional) --- */
// Changes the oversampling rates to 4x oversampling for temperature
// and 2x oversampling for humidity. Pressure measurement is skipped.
@ -394,11 +391,21 @@ if (sensor)
bme680_set_heater_profile (sensor, 0, 200, 100);
bme680_use_heater_profile (sensor, 0);
/** -- TASK CREATION PART --- */
// must be done last to avoid concurrency situations with the sensor
// configuration part
// Create a task that uses the sensor
xTaskCreate(user_task, "user_task", TASK_STACK_DEPTH, NULL, 2, NULL);
...
}
```
Last, the user task that uses the sensor has to be created.
Finally, a user task that uses the sensor has to be created.
**Please note:** To avoid concurrency situations when driver functions are used to access the sensor, for example to read data, the user task must not be created until the sensor configuration is completed.
### User task
@ -566,10 +573,7 @@ void user_init(void)
if (sensor)
{
// Create a task that uses the sensor
xTaskCreate(user_task, "user_task", TASK_STACK_DEPTH, NULL, 2, NULL);
/** -- OPTIONAL PART -- */
/** -- SENSOR CONFIGURATION PART (optional) --- */
// Changes the oversampling rates to 4x oversampling for temperature
// and 2x oversampling for humidity. Pressure measurement is skipped.
@ -584,7 +588,17 @@ void user_init(void)
// Set ambient temperature to 10 degree Celsius
bme680_set_ambient_temperature (sensor, 10);
/** -- TASK CREATION PART --- */
// must be done last to avoid concurrency situations with the sensor
// configuration part
// Create a task that uses the sensor
xTaskCreate(user_task, "user_task", TASK_STACK_DEPTH, NULL, 2, NULL);
}
else
printf("Could not initialize BME680 sensor\n");
}
```