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Weather_ESP/main/main.c
Christian Loch b4b55678a9 Integrated BME280 Bosch library
Sensor measurements are working
2020-02-15 18:09:19 +01:00

211 lines
6.2 KiB
C

//#include "freertos/FreeRTOS.h"
//#include "esp_wifi.h"
//#include "esp_system.h"
//#include "esp_event.h"
//#include "esp_event_loop.h"
//#include "nvs_flash.h"
//#include "driver/gpio.h"
#include "bme280.h"
#include "bme280_defs.h"
//#include "ssd1366.h"
#include "driver/i2c.h"
#include <u8g2.h>
#include "u8g2_esp32_hal.h"
#include <esp_log.h>
void i2c_setup()
{
printf("Setting up I²C driver... ");
//i2c_driver_install(0, I2C_MODE_MASTER, 0, 0, 0);
i2c_config_t config;
config.mode = I2C_MODE_MASTER;
config.sda_io_num = 18;
config.sda_pullup_en = GPIO_PULLUP_ENABLE;
config.scl_io_num = 19;
config.scl_pullup_en = GPIO_PULLUP_ENABLE;
config.master.clk_speed = 100000;
i2c_param_config(I2C_NUM_0, &config);
printf("Set driver parameters... ");
esp_err_t err = i2c_driver_install(I2C_NUM_0, I2C_MODE_MASTER, 0, 0, 0);
if (err == ESP_OK)
printf("Driver installed!\n");
else if (err == ESP_ERR_INVALID_ARG)
printf("Driver install failed, invalid arguments!\n");
else
printf("Driver install failed!\n");
}
void i2c_detect()
{
printf("Scanning I²C bus:\n");
uint8_t address;
printf(" 0 1 2 3 4 5 6 7 8 9 a b c d e f\r\n");
for (int i = 0; i < 128; i += 16) {
printf("%02x: ", i);
for (int j = 0; j < 16; j++) {
fflush(stdout);
address = i + j;
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write_byte(cmd, (address << 1) | I2C_MASTER_WRITE, 0x1);
i2c_master_stop(cmd);
esp_err_t ret = i2c_master_cmd_begin(I2C_NUM_0, cmd, 50 / portTICK_RATE_MS);
i2c_cmd_link_delete(cmd);
if (ret == ESP_OK) {
printf("%02x ", address);
} else if (ret == ESP_ERR_TIMEOUT) {
printf("UU ");
} else {
printf("-- ");
}
}
printf("\r\n");
}
}
int8_t i2c_read(uint8_t dev_id, uint8_t reg_addr, uint8_t *data, uint16_t len) {
//printf("Reading from bus: dev_id=%x, reg_addr=%x, data=%p, length=%u\n", dev_id, reg_addr, data, len);
/*i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
if (data_addr != -1) {
i2c_master_write_byte(cmd, chip_addr << 1 | WRITE_BIT, ACK_CHECK_EN);
i2c_master_write_byte(cmd, data_addr, ACK_CHECK_EN);
i2c_master_start(cmd);
}
i2c_master_write_byte(cmd, chip_addr << 1 | READ_BIT, ACK_CHECK_EN);
if (len > 1) {
i2c_master_read(cmd, data, len - 1, ACK_VAL);
}
i2c_master_read_byte(cmd, data + len - 1, NACK_VAL);
i2c_master_stop(cmd);
esp_err_t ret = i2c_master_cmd_begin(i2c_port, cmd, 1000 / portTICK_RATE_MS);
i2c_cmd_link_delete(cmd);*/
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write_byte(cmd, dev_id << 1 | I2C_MASTER_WRITE, 1);
i2c_master_write_byte(cmd, reg_addr, 1);
i2c_master_start(cmd);
i2c_master_write_byte(cmd, dev_id << 1 | I2C_MASTER_READ, 1);
if (len > 1) {
i2c_master_read(cmd, data, len - 1, I2C_MASTER_ACK);
}
i2c_master_read_byte(cmd, data + len - 1, I2C_MASTER_NACK);
i2c_master_stop(cmd);
i2c_master_cmd_begin(I2C_NUM_0, cmd, 500 / portTICK_RATE_MS);
i2c_cmd_link_delete(cmd);
return 0;
}
int8_t i2c_write(uint8_t dev_id, uint8_t reg_addr, uint8_t *data, uint16_t len) {
//printf("Writing to bus: dev_id=%x, reg_addr=%x, data=%p, length=%u\n", dev_id, reg_addr, data, len);
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write_byte(cmd, (dev_id << 1) | I2C_MASTER_WRITE, 1);
i2c_master_write_byte(cmd, reg_addr, 1);
i2c_master_write(cmd, data, len, 1);
i2c_master_stop(cmd);
i2c_master_cmd_begin(I2C_NUM_0, cmd, 500 / portTICK_RATE_MS);
i2c_cmd_link_delete(cmd);
return 0;
}
void i2c_delay(uint32_t period) {
vTaskDelay(period / portTICK_PERIOD_MS);
}
void i2c_shutdown()
{
printf("Shutting down I²C bus... ");
esp_err_t err = i2c_driver_delete(I2C_NUM_0);
if (err == ESP_ERR_INVALID_ARG)
printf("Failed, invalid arguments!\n");
else
printf("Success!\n");
}
void app_main(void)
{
i2c_setup();
struct bme280_dev dev;
int8_t rslt = BME280_OK;
dev.dev_id = 0x76;
dev.intf = BME280_I2C_INTF;
dev.read = i2c_read;
dev.write = i2c_write;
dev.delay_ms = i2c_delay;
rslt = bme280_init(&dev);
uint8_t settings_sel;
uint32_t req_delay;
struct bme280_data comp_data;
/* Recommended mode of operation: Indoor navigation */
dev.settings.osr_h = BME280_OVERSAMPLING_1X;
dev.settings.osr_p = BME280_OVERSAMPLING_16X;
dev.settings.osr_t = BME280_OVERSAMPLING_2X;
dev.settings.filter = BME280_FILTER_COEFF_16;
settings_sel = BME280_OSR_PRESS_SEL | BME280_OSR_TEMP_SEL | BME280_OSR_HUM_SEL | BME280_FILTER_SEL;
rslt = bme280_set_sensor_settings(settings_sel, &dev);
/*Calculate the minimum delay required between consecutive measurement based upon the sensor enabled
* and the oversampling configuration. */
req_delay = bme280_cal_meas_delay(&(dev.settings));
printf("Temperature, Pressure, Humidity\r\n");
/* Continuously stream sensor data */
while (1) {
rslt = bme280_set_sensor_mode(BME280_FORCED_MODE, &dev);
/* Wait for the measurement to complete and print data @25Hz */
dev.delay_ms(req_delay);
rslt = bme280_get_sensor_data(BME280_ALL, &comp_data, &dev);
printf("%i °c, %i hPa, %i %%\r\n", comp_data.temperature/100, comp_data.pressure/100, comp_data.humidity/1024);
vTaskDelay(50 / portTICK_PERIOD_MS);
}
i2c_shutdown();
u8g2_esp32_hal_t u8g2_esp32_hal = U8G2_ESP32_HAL_DEFAULT;
u8g2_esp32_hal.sda = 18;
u8g2_esp32_hal.scl = 19;
u8g2_esp32_hal_init(u8g2_esp32_hal);
u8g2_t u8g2;
u8g2_Setup_ssd1306_i2c_128x64_vcomh0_f(&u8g2, U8G2_R0, u8g2_esp32_i2c_byte_cb,
u8g2_esp32_gpio_and_delay_cb);
//u8x8_SetI2CAddress(&u8g2.u8x8,0x78);
u8x8_SetI2CAddress(&u8g2.u8x8,0x3C << 1);
u8g2_InitDisplay(&u8g2); // send init sequence to the display, display is in sleep mode after this,
u8g2_SetPowerSave(&u8g2, 0); // wake up display
u8g2_SetContrast(&u8g2, 50);
u8g2_uint_t r = 10;
u8g2_uint_t x = r+1;
u8g2_uint_t y = r+1;
int8_t dx = 2;
int8_t dy = 5;
while (1) {
u8g2_ClearBuffer(&u8g2);
u8g2_DrawDisc(&u8g2, x, y, r, U8G2_DRAW_ALL);
u8g2_DrawFrame(&u8g2, 0, 0, 128, 64);
u8g2_SendBuffer(&u8g2);
x = x + dx;
y = y + dy;
if (x <= 0+r+1 || x >= 127-r-1) {
dx = dx * -1;
}
if (y <= 0+r+1 || y >= 63-r-1) {
dy = dy * -1;
vTaskDelay(10 / portTICK_PERIOD_MS);
}
}
}