/*
- Linux userspace test code, simple and mose code directy from the doco.
- compile like this: gcc linux_userspace.c ../bme280.c -I ../ -o bme280
- tested: Raspberry Pi.
- Use like: ./bme280 /dev/i2c-0
+ Linux userspace test code, simple and mose code directy from the doco.
+ compile like this: gcc linux_userspace.c ../bme280.c -I ../ -o bme280
+ tested: Raspberry Pi.
+ Use like: ./bme280 /dev/i2c-0
*/
#include "bme280.h"
#include <string.h>
int8_t user_i2c_read(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len)
{
- write(fd, ®_addr,1);
- read(fd, data, len);
- return 0;
+ write(fd, ®_addr, 1);
+ read(fd, data, len);
+ return 0;
}
void user_delay_ms(uint32_t period)
{
- usleep(period*1000);
+ usleep(period * 1000);
}
int8_t user_i2c_write(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len)
{
- int8_t *buf;
- buf = malloc(len +1);
- buf[0] = reg_addr;
- memcpy(buf +1, data, len);
- write(fd, buf, len +1);
- free(buf);
- return 0;
+ int8_t *buf;
+ buf = malloc(len +1);
+ buf[0] = reg_addr;
+ memcpy(buf + 1, data, len);
+ write(fd, buf, len + 1);
+ free(buf);
+ return 0;
}
void print_sensor_data(struct bme280_data *comp_data)
{
#ifdef BME280_FLOAT_ENABLE
- printf("temp %0.2f, p %0.2f, hum %0.2f\r\n",comp_data->temperature, comp_data->pressure, comp_data->humidity);
+ printf("temp %0.2f, p %0.2f, hum %0.2f\n", comp_data->temperature, comp_data->pressure, comp_data->humidity);
#else
- printf("temp %ld, p %ld, hum %ld\r\n",comp_data->temperature, comp_data->pressure, comp_data->humidity);
+ printf("temp %d, p %d, hum %d\n", comp_data->temperature, comp_data->pressure, comp_data->humidity);
#endif
}
int8_t stream_sensor_data_forced_mode(struct bme280_dev *dev)
{
- int8_t rslt;
- uint8_t settings_sel;
- struct bme280_data comp_data;
+ int8_t rslt;
+ uint8_t settings_sel;
+ 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;
+ /* 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;
+ 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);
+ rslt = bme280_set_sensor_settings(settings_sel, dev);
+ if (rslt != BME280_OK)
+ {
+ fprintf(stderr, "Failed to set sensor settings.");
+ return rslt;
+ }
- printf("Temperature, Pressure, Humidity\r\n");
- /* Continuously stream sensor data */
- while (1)
- {
- rslt = bme280_set_sensor_mode(BME280_FORCED_MODE, dev);
- if (rslt != BME280_OK)
- break;
- /* Wait for the measurement to complete and print data @25Hz */
- dev->delay_ms(40);
- rslt = bme280_get_sensor_data(BME280_ALL, &comp_data, dev);
- if (rslt != BME280_OK)
- break;
- print_sensor_data(&comp_data);
- }
- return rslt;
+ printf("Temperature, Pressure, Humidity\n");
+ /* Continuously stream sensor data */
+ while (1)
+ {
+ rslt = bme280_set_sensor_mode(BME280_FORCED_MODE, dev);
+ if (rslt != BME280_OK)
+ break;
+ /* Wait for the measurement to complete and print data @25Hz */
+ dev->delay_ms(40);
+ rslt = bme280_get_sensor_data(BME280_ALL, &comp_data, dev);
+ if (rslt != BME280_OK)
+ break;
+ print_sensor_data(&comp_data);
+ }
+ return rslt;
}
int main(int argc, char* argv[])
{
- struct bme280_dev dev;
- int8_t rslt = BME280_OK;
+ struct bme280_dev dev;
+ int8_t rslt = BME280_OK;
- if (argc < 2)
- {
- printf("Missing argument for I2C device.\n");
- exit(1);
- }
-
- // make sure to select BME280_I2C_ADDR_PRIM
- // or BME280_I2C_ADDR_SEC as needed
- dev.dev_id =
+ if (argc < 2)
+ {
+ fprintf(stderr, "Missing argument for i2c bus.\n");
+ exit(1);
+ }
+
+ // make sure to select BME280_I2C_ADDR_PRIM
+ // or BME280_I2C_ADDR_SEC as needed
+ dev.dev_id =
#if 1
- BME280_I2C_ADDR_PRIM
+ BME280_I2C_ADDR_PRIM
#else
- BME280_I2C_ADDR_SEC
+ BME280_I2C_ADDR_SEC
#endif
- ;
+ ;
- dev.intf = BME280_I2C_INTF;
- dev.read = user_i2c_read;
- dev.write = user_i2c_write;
- dev.delay_ms = user_delay_ms;
+ dev.intf = BME280_I2C_INTF;
+ dev.read = user_i2c_read;
+ dev.write = user_i2c_write;
+ dev.delay_ms = user_delay_ms;
- if ((fd = open(argv[1], O_RDWR)) < 0) {
- printf("Failed to open the i2c bus %s\n", argv[1]);
- exit(1);
- }
- if (ioctl(fd, I2C_SLAVE, dev.dev_id) < 0) {
- printf("Failed to acquire bus access and/or talk to slave.\n");
- exit(1);
- }
-
- rslt = bme280_init(&dev);
- if (rslt != BME280_OK)
- {
- printf("Failed to initialize the device.\n");
- exit(1);
- }
- rslt = stream_sensor_data_forced_mode(&dev);
- if (rslt != BME280_OK)
- {
- printf("Failed to stream sensor data.\n");
- exit(1);
- }
- return 0;
+ if ((fd = open(argv[1], O_RDWR)) < 0)
+ {
+ fprintf(stderr, "Failed to open the i2c bus %s\n", argv[1]);
+ exit(1);
+ }
+ if (ioctl(fd, I2C_SLAVE, dev.dev_id) < 0)
+ {
+ fprintf(stderr, "Failed to acquire bus access and/or talk to slave.\n");
+ exit(1);
+ }
+
+ rslt = bme280_init(&dev);
+ if (rslt != BME280_OK)
+ {
+ fprintf(stderr, "Failed to initialize the device.\n");
+ exit(1);
+ }
+ rslt = stream_sensor_data_forced_mode(&dev);
+ if (rslt != BME280_OK)
+ {
+ fprintf(stderr, "Failed to stream sensor data.\n");
+ exit(1);
+ }
+ return 0;
}