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- Delaying and repeating i2c operation automatically when i2c interface is busy removed. User has to deal with concurrency using semaphores.

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- GPIO_ID_PIN macros removed
- Soft reset mechanism of SHT3x does not work when sensor is in any measurement mode. Therefore, it does not abort initialization procedure anymore
- typos
- changes to use the same source code with ESP8266 (esp-open-rtos) and ESP32 (ESP-IDF)
This commit is contained in:
Gunar Schorcht 2017-12-21 19:02:02 +01:00
parent c3ae04c93f
commit ca0b5da905
7 changed files with 254 additions and 110 deletions
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36
examples/sht3x/README.md
View file

@ -6,29 +6,31 @@ These examples demonstrate the usage of the SHT3x driver with only one and multi
There are examples for only one sensor and examples for two sensors.
To run examples with **one sensor**, just use GPIO5 (SCL) and GPIO4 (SDA) to connect to the SHT3x sensor's I2C interface.
To run examples with **one sensor**, just use GPIO14 (SCL) and GPIO13 (SDA) to connect to the SHT3x sensor's I2C interface.
```
+------------------------+ +--------+
| ESP8266 Bus 0 | | SHT3x |
| GPIO 5 (SCL) >---- > SCL |
| GPIO 4 (SDA) ------- SDA |
| | +--------+
+------------------------+
+-----------------+ +----------+
| ESP8266 / ESP32 | | SHT3x |
| | | |
| GPIO 14 (SCL) ------> SCL |
| GPIO 13 (SDA) <-----> SDA |
+-----------------+ +----------+
```
If you want to run examples with **two sensors**, you could do this with only one bus and different I2C addresses or with two buses and the same or different I2C addresses. In later case, use GPIO14 (SCL) and GPIO12 (SDA) for the second bus to connect to the second SHT3x sensor's I2C interface.
If you want to run examples with **two sensors**, you could do this with only one bus and different I2C addresses or with two buses and the same or different I2C addresses. In later case, use GPIO5 (SCL) and GPIO4 (SDA) for the second bus to connect to the second SHT3x sensor's I2C interface.
```
+------------------------+ +----------+
| ESP8266 Bus 0 | | SHT3x_1 |
| GPIO 5 (SCL) >-----> SCL |
| GPIO 4 (SDA) ------- SDA |
| | +----------+
| Bus 1 | | SHT3x_2 |
| GPIO 14 (SCL) >-----> SCL |
| GPIO 12 (SDA) ------- SDA |
+------------------------+ +----------+
+-----------------+ +----------+
| ESP8266 / ESP32 | | SHT3x_1 |
| | | |
| GPIO 14 (SCL) ------> SCL |
| GPIO 13 (SDA) <-----> SDA |
| | +----------+
| | | SHT3x_2 |
| | | |
| GPIO 5 (SCL) ------> SCL |
| GPIO 4 (SDA) <-----> SDA |
+-----------------+ +----------+
```
## Example description

56
examples/sht3x/sht3x.c
View file

@ -10,29 +10,44 @@
*
* Harware configuration:
*
* +------------------------+ +----------+
* | ESP8266 Bus 0 | | SHT3x |
* | GPIO 5 (SCL) ------> SCL |
* | GPIO 4 (SDA) ------- SDA |
* +------------------------+ +----------+
* +-----------------+ +----------+
* | ESP8266 / ESP32 | | SHT3x |
* | | | |
* | GPIO 14 (SCL) ------> SCL |
* | GPIO 13 (SDA) <-----> SDA |
* +-----------------+ +----------+
*/
/* -- use following constants to define the example mode ----------- */
// #define SINGLE_SHOT_LOW_LEVEL
// #define SINGLE_SHOT_HIGH_LEVEL
#include "espressif/esp_common.h"
#include "esp/uart.h"
#include "FreeRTOS.h"
#include "task.h"
/* -- includes ----------------------------------------------------- */
// include SHT3x driver
#include "sht3x/sht3x.h"
#include "sht3x.h"
// define I2C interfaces at which SHTx3 sensors are 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_SCL_PIN GPIO_ID_PIN((5))
#define I2C_SDA_PIN GPIO_ID_PIN((4))
#define I2C_SCL_PIN 14
#define I2C_SDA_PIN 13
#define I2C_FREQ I2C_FREQ_100K
/* -- user tasks --------------------------------------------------- */
static sht3x_sensor_t* sensor; // sensor device data structure
@ -130,23 +145,24 @@ void user_task (void *pvParameters)
}
#endif
/* -- main program ------------------------------------------------- */
void user_init(void)
{
// Set UART Parameter.
uart_set_baud(0, 115200);
// Give the UART some time to settle.
sdk_os_delay_us(500);
// Give the UART some time to settle
vTaskDelay(1);
// Init I2C bus interfaces at which SHT3x sensors are connected
// (different busses are possible).
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);
// Create the sensors, multiple sensors are possible.
if ((sensor = sht3x_init_sensor (I2C_BUS, SHT3x_ADDR_2)))
{
// Create a user task that uses the sensors.
xTaskCreate(user_task, "user_task", 256, NULL, 2, 0);
xTaskCreate(user_task, "user_task", TASK_STACK_DEPTH, NULL, 2, 0);
}
// That's it.