Integrated BME280 Bosch library

Sensor measurements are working

main/CMakeLists.txt

@@ -2,7 +2,7 @@
 set(COMPONENT_REQUIRES )
 set(COMPONENT_PRIV_REQUIRES )
 
-set(COMPONENT_SRCS "main.c" "u8g2_esp32_hal.c")
+set(COMPONENT_SRCS "main.c" "u8g2_esp32_hal.c" "bme280.c")
 set(COMPONENT_ADD_INCLUDEDIRS "")
 
 register_component()

main/bme280_defs.h

@@ -100,7 +100,7 @@
 
 #ifndef BME280_FLOAT_ENABLE
 #ifndef BME280_64BIT_ENABLE
-#define BME280_64BIT_ENABLE
+/* #define BME280_64BIT_ENABLE */
 #endif
 #endif
 

main/main.c

@@ -6,6 +6,7 @@
 //#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>
@@ -62,6 +63,56 @@ void i2c_detect()
 	}
 }
 
+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... ");
@@ -75,8 +126,48 @@ void i2c_shutdown()
 void app_main(void)
 {
 	i2c_setup();
-	i2c_detect();
+	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;