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Merge pull request #526 from gschorcht/ccs811

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CCS811 driver updates
This commit is contained in:
Ruslan V. Uss 2017-12-24 04:54:24 +05:00 committed by GitHub
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14
examples/ccs811/README.md
View file

@ -9,8 +9,8 @@ Most examples use only one CCS811 sensor. Following figure shows the hardware co
``` ```
+------------------------+ +--------+ +------------------------+ +--------+
| ESP8266 Bus 0 | | CCS811 | | ESP8266 Bus 0 | | CCS811 |
| GPIO 5 (SCL) >----> SCL | | GPIO 5 (SCL) -----> SCL |
| GPIO 4 (SDA) ------ SDA | | GPIO 4 (SDA) <----> SDA |
| GND -----> /WAKE | | GND -----> /WAKE |
+------------------------+ +--------+ +------------------------+ +--------+
``` ```
@ -20,8 +20,8 @@ If *nINT* interrupt is used to fetch new data, additionally the interrupt pin ha
``` ```
+------------------------+ +--------+ +------------------------+ +--------+
| ESP8266 Bus 0 | | CCS811 | | ESP8266 Bus 0 | | CCS811 |
| GPIO 5 (SCL) >----> SCL | | GPIO 5 (SCL) -----> SCL |
| GPIO 4 (SDA) ------ SDA | | GPIO 4 (SDA) <----> SDA |
| GPIO 2 <----- /nINT | | GPIO 2 <----- /nINT |
| GND -----> /WAKE | | GND -----> /WAKE |
+------------------------+ +--------+ +------------------------+ +--------+
@ -32,13 +32,13 @@ In examples where CCS811 sensor is used in conjunction with a SHT3x sensor, the
``` ```
+------------------------+ +--------+ +------------------------+ +--------+
| ESP8266 Bus 0 | | CCS811 | | ESP8266 Bus 0 | | CCS811 |
| GPIO 5 (SCL) >--+----> SCL | | GPIO 5 (SCL) ---+----> SCL |
| GPIO 4 (SDA) ---|-+--- SDA | | GPIO 4 (SDA) <--|-+--> SDA |
| GND ---|-|--> /WAKE | | GND ---|-|--> /WAKE |
| | | | +--------+ | | | | +--------+
| | | | | SHT3x | | | | | | SHT3x |
| | +----> SCL | | | +----> SCL |
| | +--- SDA | | | +--> SDA |
+------------------------+ +--------+ +------------------------+ +--------+
``` ```

97
examples/ccs811/ccs811_one_sensor/ccs811_one_sensor.c
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@ -6,40 +6,57 @@
* *
* Harware configuration: * Harware configuration:
* *
* +------------------------+ +--------+ * +-----------------+ +----------+
* | ESP8266 Bus 0 | | CCS811 | * | ESP8266 / ESP32 | | CCS811 |
* | GPIO 5 (SCL) >----> SCL | * | | | |
* | GPIO 4 (SDA) ------ SDA | * | GPIO 14 (SCL) ----> SCL |
* | GPIO 2 <----- /nINT | * | GPIO 13 (SDA) <---> SDA |
* | GND -----> /WAKE | * | GPIO 5 <---- INT1 |
* +------------------------+ +--------+ * | GND ----> /WAKE |
* +-----------------+ +----------+
*/ */
// use following constants to define the demo mode /* -- use following constants to define the example mode ----------- */
// #define INT_DATA_RDY_USED // #define INT_DATA_RDY_USED
// #define INT_THRESHOLD_USED // #define INT_THRESHOLD_USED
#include "espressif/esp_common.h" #if defined(INT_DATA_RDY_USED) || defined(INT_THRESHOLD_USED)
#include "esp/uart.h" #define INT_USED
#include "i2c/i2c.h" #endif
#include "FreeRTOS.h" /* -- includes ----------------------------------------------------- */
#include <task.h>
// include CCS811 driver #include "ccs811.h"
#include "ccs811/ccs811.h"
// define I2C interfaces at which CCS811 sensors can be connected /* -- platform dependent definitions ------------------------------- */
#ifdef ESP_PLATFORM // ESP32 (ESP-IDF)
// user task stack depth for ESP32
#define TASK_STACK_DEPTH 2048
#else // ESP8266 (esp-open-rtos)
// user task stack depth for ESP8266
#define TASK_STACK_DEPTH 256
#endif // ESP_PLATFORM
// I2C interface defintions for ESP32 and ESP8266
#define I2C_BUS 0 #define I2C_BUS 0
#define I2C_SCL_PIN 5 #define I2C_SCL_PIN 14
#define I2C_SDA_PIN 4 #define I2C_SDA_PIN 13
#define I2C_FREQ I2C_FREQ_100K
// define GPIO for interrupt // interrupt GPIOs defintions for ESP8266 and ESP32
#define INT_GPIO 2 #define nINT_PIN 13
/* -- user tasks --------------------------------------------------- */
static ccs811_sensor_t* sensor; static ccs811_sensor_t* sensor;
#if defined(INT_DATA_RDY_USED) || defined(INT_THRESHOLD_USED) #ifdef INT_USED
/** /**
* In this example, the interrupt *nINT* is used. It is triggered every time * In this example, the interrupt *nINT* is used. It is triggered every time
* new data are available (INT_DATA_RDY_USED) or exceed defined thresholds * new data are available (INT_DATA_RDY_USED) or exceed defined thresholds
@ -73,12 +90,12 @@ void user_task_interrupt (void *pvParameters)
// Interrupt handler which resumes user_task_interrupt on interrupt // Interrupt handler which resumes user_task_interrupt on interrupt
void nINT_handler (uint8_t gpio) static void IRAM nINT_handler(uint8_t gpio)
{ {
xTaskResumeFromISR (nINT_task); xTaskResumeFromISR (nINT_task);
} }
#else #else // !INT_USED
/* /*
* In this example, user task fetches the sensor values every seconds. * In this example, user task fetches the sensor values every seconds.
@ -106,20 +123,21 @@ void user_task_periodic(void *pvParameters)
} }
} }
#endif #endif // INT_USED
/* -- main program ------------------------------------------------- */
void user_init(void) void user_init(void)
{ {
// set UART Parameter // Set UART Parameter.
uart_set_baud(0, 115200); uart_set_baud(0, 115200);
// give the UART some time to settle // Give the UART some time to settle
sdk_os_delay_us(500); vTaskDelay(1);
/** -- MANDATORY PART -- */ /** -- MANDATORY PART -- */
// init all I2C bus interfaces at which CCS811 sensors are connected // init all I2C bus interfaces at which CCS811 sensors are connected
i2c_init (I2C_BUS, I2C_SCL_PIN, I2C_SDA_PIN, I2C_FREQ_100K); i2c_init (I2C_BUS, I2C_SCL_PIN, I2C_SDA_PIN, I2C_FREQ);
// longer clock stretching is required for CCS811 // longer clock stretching is required for CCS811
i2c_set_clock_stretch (I2C_BUS, CCS811_I2C_CLOCK_STRETCH); i2c_set_clock_stretch (I2C_BUS, CCS811_I2C_CLOCK_STRETCH);
@ -129,28 +147,29 @@ void user_init(void)
if (sensor) if (sensor)
{ {
#if defined(INT_DATA_RDY_USED) || defined(INT_THRESHOLD_USED) #if !defined (INT_USED)
// create a periodic task that uses the sensor
xTaskCreate(user_task_periodic, "user_task_periodic", TASK_STACK_DEPTH, NULL, 2, NULL);
#else // INT_USED
// create a task that is resumed by interrupt handler to use the sensor // create a task that is resumed by interrupt handler to use the sensor
xTaskCreate(user_task_interrupt, "user_task_interrupt", 256, NULL, 2, &nINT_task); xTaskCreate(user_task_interrupt, "user_task_interrupt", TASK_STACK_DEPTH, NULL, 2, &nINT_task);
// activate the interrupt for INT_GPIO and set the interrupt handler // activate the interrupt for nINT_PIN and set the interrupt handler
gpio_set_interrupt(INT_GPIO, GPIO_INTTYPE_EDGE_NEG, nINT_handler); gpio_enable(nINT_PIN, GPIO_INPUT);
gpio_set_interrupt(nINT_PIN, GPIO_INTTYPE_EDGE_NEG, nINT_handler);
#ifdef INT_DATA_RDY_USED #ifdef INT_DATA_RDY_USED
// enable the data ready interrupt // enable the data ready interrupt
ccs811_enable_interrupt (sensor, true); ccs811_enable_interrupt (sensor, true);
#else #else // INT_THRESHOLD_USED
// set threshold parameters and enable threshold interrupt mode // set threshold parameters and enable threshold interrupt mode
ccs811_set_eco2_thresholds (sensor, 600, 1100, 40); ccs811_set_eco2_thresholds (sensor, 600, 1100, 40);
#endif #endif
#else #endif // !defined(INT_USED)
// create a periodic task that uses the sensor
xTaskCreate(user_task_periodic, "user_task_periodic", 256, NULL, 2, NULL);
#endif
// start periodic measurement with one measurement per second // start periodic measurement with one measurement per second
ccs811_set_mode (sensor, ccs811_mode_1s); ccs811_set_mode (sensor, ccs811_mode_1s);

10
examples/ccs811/ccs811_plus_sht3x/ccs811_plus_sht3x.c
View file

@ -6,13 +6,13 @@
* *
* +------------------------+ +--------+ * +------------------------+ +--------+
* | ESP8266 Bus 0 | | CCS811 | * | ESP8266 Bus 0 | | CCS811 |
* | GPIO 5 (SCL) >--+----> SCL | * | GPIO 14 (SCL) ---+----> SCL |
* | GPIO 4 (SDA) ---|-+--- SDA | * | GPIO 13 (SDA) <--|-+--> SDA |
* | GND ---|-|--> /WAKE | * | GND ---|-|--> /WAKE |
* | | | | +--------+ * | | | | +--------+
* | | | | | SHT3x | * | | | | | SHT3x |
* | | +----> SCL | * | | +----> SCL |
* | | +--- SDA | * | | +--> SDA |
* +------------------------+ +--------+ * +------------------------+ +--------+
*/ */
@ -31,8 +31,8 @@
// define I2C interfaces at which CCS811 and SHT3x sensors are connected // define I2C interfaces at which CCS811 and SHT3x sensors are connected
#define I2C_BUS 0 #define I2C_BUS 0
#define I2C_SCL_PIN 5 #define I2C_SCL_PIN 14
#define I2C_SDA_PIN 4 #define I2C_SDA_PIN 13
static ccs811_sensor_t* ccs811; // CCS811 device data structure static ccs811_sensor_t* ccs811; // CCS811 device data structure
static sht3x_sensor_t* sht3x; // SHT3x device data structure static sht3x_sensor_t* sht3x; // SHT3x device data structure

8
examples/ccs811/ccs811_temperature/ccs811_temperature.c
View file

@ -7,8 +7,8 @@
* *
* +------------------------+ +--------+ * +------------------------+ +--------+
* | ESP8266 Bus 0 | | CCS811 | * | ESP8266 Bus 0 | | CCS811 |
* | GPIO 5 (SCL) >----> SCL | * | GPIO 14 (SCL) >----> SCL |
* | GPIO 4 (SDA) ------ SDA | * | GPIO 13 (SDA) <----> SDA |
* | GND -----> /WAKE | * | GND -----> /WAKE |
* +------------------------+ +--------+ * +------------------------+ +--------+
*/ */
@ -27,8 +27,8 @@
// define I2C interfaces at which CCS811 sensors can be connected // define I2C interfaces at which CCS811 sensors can be connected
#define I2C_BUS 0 #define I2C_BUS 0
#define I2C_SCL_PIN 5 #define I2C_SCL_PIN 14
#define I2C_SDA_PIN 4 #define I2C_SDA_PIN 13
static ccs811_sensor_t* sensor; static ccs811_sensor_t* sensor;

152
extras/ccs811/README.md
View file

@ -1,6 +1,8 @@
# Driver for the ams CCS811 digital gas sensor for monitoring indoor air quality. # Driver for the ams CCS811 digital gas sensor for monitoring indoor air quality.
This driver is written for usage with the ESP8266 and FreeRTOS using the I2C interface driver. The driver is for the usage with the ESP8266 and [esp-open-rtos](https://github.com/SuperHouse/esp-open-rtos).
It is also working with ESP32 and [ESP-IDF](https://github.com/espressif/esp-idf.git) using a wrapper component for ESP8266 functions, see folder ```components/esp8266_wrapper```, as well as Linux based systems using a wrapper library.
## About the sensor ## About the sensor
@ -32,7 +34,7 @@ After power up, the sensor starts automatically in *Idle, Low Current Mode* (```
**Please note:** In *Constant Power Mode* with measurements every 250 ms (```mode_250ms```) only raw data are available. In all other measurement modes, the Indoor Air Quality (IAQ) values are available additionally. The *Constant Power Mode* with measurements every 250 ms (```mode_250ms```) is only intended for systems where an external host system wants to run an algorithm with raw data. **Please note:** In *Constant Power Mode* with measurements every 250 ms (```mode_250ms```) only raw data are available. In all other measurement modes, the Indoor Air Quality (IAQ) values are available additionally. The *Constant Power Mode* with measurements every 250 ms (```mode_250ms```) is only intended for systems where an external host system wants to run an algorithm with raw data.
Once the is initialized with function ```ccs811_init_sensor```, function ```ccs811_set_mode``` can be used to start periodic measurements with a given period. Once the sensor is initialized with function ```ccs811_init_sensor```, function ```ccs811_set_mode``` can be used to start periodic measurements with a given period.
``` ```
static ccs811_sensor_t* sensor; static ccs811_sensor_t* sensor;
@ -211,42 +213,46 @@ First, the hardware configuration has to be established.
### Hardware configurations ### Hardware configurations
Following figure shows the hardware configuration if no interrupt is used. Following figure shows the hardware configuration for ESP8266 and ESP32 if no interrupt is used.
``` ```
+------------------------+ +--------+ +------------------+ +--------+
| ESP8266 Bus 0 | | CCS811 | | ESP8266 / ESP32 | | CCS811 |
| GPIO 5 (SCL) >----> SCL | | | | |
| GPIO 4 (SDA) ------ SDA | | GPIO 14 (SCL) >-------> SCL |
| GND -----> /WAKE | | GPIO 13 (SDA) <-------> SDA |
+------------------------+ +--------+ | GND --------> /WAKE |
+------------------+ +--------+
``` ```
If interrupt signal *nINT* is used to fetch new data, additionally the interrupt pin has to be connected to a GPIO pin. If interrupt signal *nINT* is used to fetch new data, additionally the interrupt pin has to be connected to a GPIO pin.
``` ```
+------------------------+ +--------+ +------------------+ +--------+
| ESP8266 Bus 0 | | CCS811 | | ESP8266 / ESP32 | | CCS811 |
| GPIO 5 (SCL) >----> SCL | | | | |
| GPIO 4 (SDA) ------ SDA | | GPIO 14 (SCL) >-------> SCL |
| GPIO 2 <----- /nINT | | GPIO 13 (SDA) <-------> SDA |
| GND -----> /WAKE | | GPIO 5 <-------- /nINT |
+------------------------+ +--------+ | GND --------> /WAKE |
+------------------+ +--------+
``` ```
If CCS811 sensor is used in conjunction with another sensor, e.g., a SHT3x sensor, the hardware configuration looks like following: If CCS811 sensor is used in conjunction with another sensor, e.g., a SHT3x sensor, the hardware configuration looks like following:
``` ```
+------------------------+ +--------+ +------------------+ +--------+
| ESP8266 Bus 0 | | CCS811 | | ESP8266 / ESP32 | | CCS811 |
| GPIO 5 (SCL) >--+----> SCL | | | | |
| GPIO 4 (SDA) ---|-+--- SDA | | GPIO 14 (SCL) >--+----> SCL |
| GND ---|-|--> /WAKE | | GPIO 13 (SDA) <--|-+--> SDA |
| | | | +--------+ | GND ---|-|--> /WAKE |
| | | | | SHT3x | | | | | +--------+
| | +----> SCL | | | | | | SHT3x |
| | +--- SDA | | | | | | |
+------------------------+ +--------+ | | +----> SCL |
| | +--> SDA |
+------------------+ +--------+
``` ```
### Communication interface settings ### Communication interface settings
@ -256,12 +262,11 @@ Dependent on the hardware configuration, the communication interface settings ha
``` ```
// define I2C interfaces at which CCS811 sensors can be connected // define I2C interfaces at which CCS811 sensors can be connected
#define I2C_BUS 0 #define I2C_BUS 0
#define I2C_SCL_PIN 5 #define I2C_SCL_PIN 14
#define I2C_SDA_PIN 4 #define I2C_SDA_PIN 13
// define GPIO for interrupt // define GPIO for interrupt
#define INT_GPIO 2 #define INT_GPIO 5
#include "sht3x/sht3x.h"
``` ```
### Main program ### Main program
@ -272,7 +277,7 @@ Before using the CCS811 driver, function ```i2c_init``` needs to be called for e
``` ```
... ...
i2c_init(I2C_BUS, I2C_SCL_PIN, I2C_SDA_PIN, I2C_FREQ_100K)); i2c_init(I2C_BUS, I2C_SCL_PIN, I2C_SDA_PIN, I2C_FREQ_100K);
i2c_set_clock_stretch (I2C_BUS, CCS811_I2C_CLOCK_STRETCH); i2c_set_clock_stretch (I2C_BUS, CCS811_I2C_CLOCK_STRETCH);
... ...
``` ```
@ -401,31 +406,47 @@ ccs811_set_eco2_thresholds (sensor, 600, 1100, 40);
## Full Example ## Full Example
``` ```
// use following constants to define the demo mode /* -- use following constants to define the example mode ----------- */
// #define INT_DATA_RDY_USED // #define INT_DATA_RDY_USED
// #define INT_THRESHOLD_USED // #define INT_THRESHOLD_USED
#include "espressif/esp_common.h" #if defined(INT_DATA_RDY_USED) || defined(INT_THRESHOLD_USED)
#include "esp/uart.h" #define INT_USED
#include "i2c/i2c.h" #endif
#include "FreeRTOS.h" /* -- includes ----------------------------------------------------- */
#include <task.h>
// include CCS811 driver #include "ccs811.h"
#include "ccs811/ccs811.h"
// define I2C interfaces at which CCS811 sensors can be connected /* -- platform dependent definitions ------------------------------- */
#ifdef ESP_PLATFORM // ESP32 (ESP-IDF)
// user task stack depth for ESP32
#define TASK_STACK_DEPTH 2048
#else // ESP8266 (esp-open-rtos)
// user task stack depth for ESP8266
#define TASK_STACK_DEPTH 256
#endif // ESP_PLATFORM
// I2C interface defintions for ESP32 and ESP8266
#define I2C_BUS 0 #define I2C_BUS 0
#define I2C_SCL_PIN 5 #define I2C_SCL_PIN 14
#define I2C_SDA_PIN 4 #define I2C_SDA_PIN 13
#define I2C_FREQ I2C_FREQ_100K
// define GPIO for interrupt // interrupt GPIOs defintions for ESP8266 and ESP32
#define INT_GPIO 2 #define nINT_PIN 13
/* -- user tasks --------------------------------------------------- */
static ccs811_sensor_t* sensor; static ccs811_sensor_t* sensor;
#if defined(INT_DATA_RDY_USED) || defined(INT_THRESHOLD_USED) #ifdef INT_USED
/** /**
* In this example, the interrupt *nINT* is used. It is triggered every time * In this example, the interrupt *nINT* is used. It is triggered every time
* new data are available (INT_DATA_RDY_USED) or exceed defined thresholds * new data are available (INT_DATA_RDY_USED) or exceed defined thresholds
@ -459,12 +480,12 @@ void user_task_interrupt (void *pvParameters)
// Interrupt handler which resumes user_task_interrupt on interrupt // Interrupt handler which resumes user_task_interrupt on interrupt
void nINT_handler (uint8_t gpio) static void IRAM nINT_handler(uint8_t gpio)
{ {
xTaskResumeFromISR (nINT_task); xTaskResumeFromISR (nINT_task);
} }
#else #else // !INT_USED
/* /*
* In this example, user task fetches the sensor values every seconds. * In this example, user task fetches the sensor values every seconds.
@ -492,21 +513,22 @@ void user_task_periodic(void *pvParameters)
} }
} }
#endif #endif // INT_USED
/* -- main program ------------------------------------------------- */
void user_init(void) void user_init(void)
{ {
// set UART Parameter // Set UART Parameter.
uart_set_baud(0, 115200); uart_set_baud(0, 115200);
// give the UART some time to settle // Give the UART some time to settle
sdk_os_delay_us(500); vTaskDelay(1);
/** -- MANDATORY PART -- */ /** -- MANDATORY PART -- */
// init all I2C bus interfaces at which CCS811 sensors are connected // init all I2C bus interfaces at which CCS811 sensors are connected
i2c_init(I2C_BUS, I2C_SCL_PIN, I2C_SDA_PIN, I2C_FREQ_100K); i2c_init (I2C_BUS, I2C_SCL_PIN, I2C_SDA_PIN, I2C_FREQ);
// longer clock stretching is required for CCS811 // longer clock stretching is required for CCS811
i2c_set_clock_stretch (I2C_BUS, CCS811_I2C_CLOCK_STRETCH); i2c_set_clock_stretch (I2C_BUS, CCS811_I2C_CLOCK_STRETCH);
@ -515,33 +537,35 @@ void user_init(void)
if (sensor) if (sensor)
{ {
#if defined(INT_DATA_RDY_USED) || defined(INT_THRESHOLD_USED) #if !defined (INT_USED)
// create a periodic task that uses the sensor
xTaskCreate(user_task_periodic, "user_task_periodic", TASK_STACK_DEPTH, NULL, 2, NULL);
#else // INT_USED
// create a task that is resumed by interrupt handler to use the sensor // create a task that is resumed by interrupt handler to use the sensor
xTaskCreate(user_task_interrupt, "user_task_interrupt", 256, NULL, 2, &nINT_task); xTaskCreate(user_task_interrupt, "user_task_interrupt", TASK_STACK_DEPTH, NULL, 2, &nINT_task);
// activate the interrupt for INT_GPIO and set the interrupt handler // activate the interrupt for nINT_PIN and set the interrupt handler
gpio_set_interrupt(INT_GPIO, GPIO_INTTYPE_EDGE_NEG, nINT_handler); gpio_enable(nINT_PIN, GPIO_INPUT);
gpio_set_interrupt(nINT_PIN, GPIO_INTTYPE_EDGE_NEG, nINT_handler);
#ifdef INT_DATA_RDY_USED #ifdef INT_DATA_RDY_USED
// enable the data ready interrupt // enable the data ready interrupt
ccs811_enable_interrupt (sensor, true); ccs811_enable_interrupt (sensor, true);
#else #else // INT_THRESHOLD_USED
// set threshold parameters and enable threshold interrupt mode // set threshold parameters and enable threshold interrupt mode
ccs811_set_eco2_thresholds (sensor, 600, 1100, 40); ccs811_set_eco2_thresholds (sensor, 600, 1100, 40);
#endif #endif
#else #endif // !defined(INT_USED)
// create a periodic task that uses the sensor
xTaskCreate(user_task_periodic, "user_task_periodic", 256, NULL, 2, NULL);
#endif
// start periodic measurement with one measurement per second // start periodic measurement with one measurement per second
ccs811_set_mode (sensor, ccs811_mode_1s); ccs811_set_mode (sensor, ccs811_mode_1s);
} }
} }
``` ```
## Further Examples ## Further Examples

21
extras/ccs811/ccs811.c
View file

@ -1,14 +1,16 @@
/* /*
* Driver for ams CCS811 digital temperature, humity, pressure and * Driver for AMS CCS811 digital gas sensor connected to I2C.
* gas sensor connected to I2C or SPI
* *
* Part of esp-open-rtos [https://github.com/SuperHouse/esp-open-rtos] * This driver is for the usage with the ESP8266 and FreeRTOS (esp-open-rtos)
* [https://github.com/SuperHouse/esp-open-rtos]. It is also working with ESP32
* and ESP-IDF [https://github.com/espressif/esp-idf.git] as well as Linux
* based systems using a wrapper library for ESP8266 functions.
* *
* --------------------------------------------------------------------------- * ---------------------------------------------------------------------------
* *
* The BSD License (3-clause license) * The BSD License (3-clause license)
* *
* Copyright (c) 2017 Gunar Schorcht (https://github.com/gschorcht] * Copyright (c) 2017 Gunar Schorcht (https://github.com/gschorcht)
* All rights reserved. * All rights reserved.
* *
* Redistribution and use in source and binary forms, with or without * Redistribution and use in source and binary forms, with or without
@ -39,14 +41,7 @@
*/ */
#include <string.h> #include <string.h>
#include <stdlib.h>
#include "espressif/esp_common.h"
#include "espressif/sdk_private.h"
#include "FreeRTOS.h"
#include "task.h"
#include "i2c/i2c.h"
#include "ccs811.h" #include "ccs811.h"
@ -239,7 +234,7 @@ bool ccs811_set_mode (ccs811_sensor_t* dev, ccs811_mode_t mode)
// check whether setting measurement mode were succesfull // check whether setting measurement mode were succesfull
if (!ccs811_reg_read(dev, CCS811_REG_MEAS_MODE, (uint8_t*)&reg, 1) || if (!ccs811_reg_read(dev, CCS811_REG_MEAS_MODE, (uint8_t*)&reg, 1) ||
!reg.drive_mode == mode) reg.drive_mode != mode)
{ {
error_dev ("Could not set measurement mode to %d", __FUNCTION__, dev, mode); error_dev ("Could not set measurement mode to %d", __FUNCTION__, dev, mode);
return ccs811_check_error_status (dev); return ccs811_check_error_status (dev);

17
extras/ccs811/ccs811.h
View file

@ -1,13 +1,16 @@
/* /*
* Driver for AMS CCS811 digital gas sensor connected to I2C * Driver for AMS CCS811 digital gas sensor connected to I2C.
* *
* Part of esp-open-rtos [https://github.com/SuperHouse/esp-open-rtos] * This driver is for the usage with the ESP8266 and FreeRTOS (esp-open-rtos)
* [https://github.com/SuperHouse/esp-open-rtos]. It is also working with ESP32
* and ESP-IDF [https://github.com/espressif/esp-idf.git] as well as Linux
* based systems using a wrapper library for ESP8266 functions.
* *
* --------------------------------------------------------------------------- * ---------------------------------------------------------------------------
* *
* The BSD License (3-clause license) * The BSD License (3-clause license)
* *
* Copyright (c) 2017 Gunar Schorcht (https://github.com/gschorcht] * Copyright (c) 2017 Gunar Schorcht (https://github.com/gschorcht)
* All rights reserved. * All rights reserved.
* *
* Redistribution and use in source and binary forms, with or without * Redistribution and use in source and binary forms, with or without
@ -40,13 +43,15 @@
#ifndef CCS811_DRV_H_ #ifndef CCS811_DRV_H_
#define CCS811_DRV_H_ #define CCS811_DRV_H_
#include "stdint.h"
#include "stdbool.h"
// Uncomment one of the following defines to enable debug output // Uncomment one of the following defines to enable debug output
// #define CCS811_DEBUG_LEVEL_1 // only error messages // #define CCS811_DEBUG_LEVEL_1 // only error messages
// #define CCS811_DEBUG_LEVEL_2 // debug and error messages // #define CCS811_DEBUG_LEVEL_2 // debug and error messages
#include "stdint.h"
#include "stdbool.h"
#include "ccs811_platform.h"
// CCS811 I2C addresses // CCS811 I2C addresses
#define CCS811_I2C_ADDRESS_1 0x5A // default #define CCS811_I2C_ADDRESS_1 0x5A // default
#define CCS811_I2C_ADDRESS_2 0x5B #define CCS811_I2C_ADDRESS_2 0x5B

69
extras/ccs811/ccs811_platform.h Normal file
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@ -0,0 +1,69 @@
/*
* Driver for AMS CCS811 digital gas sensor connected to I2C.
*
* This driver is for the usage with the ESP8266 and FreeRTOS (esp-open-rtos)
* [https://github.com/SuperHouse/esp-open-rtos]. It is also working with ESP32
* and ESP-IDF [https://github.com/espressif/esp-idf.git] as well as Linux
* based systems using a wrapper library for ESP8266 functions.
*
* ---------------------------------------------------------------------------
*
* The BSD License (3-clause license)
*
* Copyright (c) 2017 Gunar Schorcht (https://github.com/gschorcht)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/**
* Platform file: platform specific definitions, includes and functions
*/
#ifndef __CCS811_PLATFORM_H__
#define __CCS811_PLATFORM_H__
#if !defined(ESP_OPEN_RTOS)
#define ESP_OPEN_RTOS 1
#endif
#ifdef ESP_OPEN_RTOS // ESP8266
// platform specific includes
#include "FreeRTOS.h"
#include "task.h"
#include "espressif/esp_common.h"
#include "espressif/sdk_private.h"
#include "esp/uart.h"
#include "i2c/i2c.h"
#endif // ESP_OPEN_RTOS
#endif // __CCS811_PLATFORM_H__

1
extras/ccs811/component.mk
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@ -2,6 +2,7 @@
# expected anyone using ccs811 driver includes it as 'ccs811/ccs811.h' # expected anyone using ccs811 driver includes it as 'ccs811/ccs811.h'
INC_DIRS += $(ccs811_ROOT).. INC_DIRS += $(ccs811_ROOT)..
INC_DIRS += $(ccs811_ROOT)
# args for passing into compile rule generation # args for passing into compile rule generation
ccs811_SRC_DIR = $(ccs811_ROOT) ccs811_SRC_DIR = $(ccs811_ROOT)