-/*
- 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 <string.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <linux/i2c-dev.h>
-#include <sys/ioctl.h>
-#include <sys/types.h>
-#include <fcntl.h>
-#include "bme280.h"
-
-int fd;
-
-int8_t user_i2c_read(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len)
-{
- if (write(fd, ®_addr, sizeof(reg_addr)) < sizeof(reg_addr))
- return BME280_E_COMM_FAIL;
- if (read(fd, data, len) < len)
- return BME280_E_COMM_FAIL;
- return BME280_OK;
-}
-
-void user_delay_ms(uint32_t period)
-{
- 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);
- if (write(fd, buf, len + 1) < len)
- return BME280_E_COMM_FAIL;
- free(buf);
- return BME280_OK;
-}
-
-void print_sensor_data(struct bme280_data *comp_data)
-{
- float temp, press, hum;
-#ifdef BME280_FLOAT_ENABLE
- temp = comp_data->temperature;
- press = 0.01 * comp_data->pressure;
- hum = comp_data->humidity;
-#else
-#ifdef BME280_64BIT_ENABLE
- temp = 0.01f * comp_data->temperature;
- press = 0.0001f * comp_data->pressure;
- hum = 1.0f / 1024.0f * comp_data->humidity;
-#else
- temp = 0.01f * comp_data->temperature;
- press = 0.01f * comp_data->pressure;
- hum = 1.0f / 1024.0f * comp_data->humidity;
-#endif
-#endif
- printf("%0.2lf deg C, %0.2lf hPa, %0.2lf%%\n", temp, press, hum);
-}
-
-int8_t stream_sensor_data_forced_mode(struct bme280_dev *dev)
-{
- 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;
-
- 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);
- if (rslt != BME280_OK)
- {
- fprintf(stderr, "Failed to set sensor settings (code %+d).", rslt);
- 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)
- {
- fprintf(stderr, "Failed to set sensor mode (code %+d).", rslt);
- 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)
- {
- fprintf(stderr, "Failed to get sensor data (code %+d).", rslt);
- break;
- }
- print_sensor_data(&comp_data);
- }
- return rslt;
-}
-
-int main(int argc, char* argv[])
-{
- struct bme280_dev dev;
- int8_t rslt = BME280_OK;
-
- 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
-#else
- 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;
-
- 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 (code %+d).\n", rslt);
- exit(1);
- }
- rslt = stream_sensor_data_forced_mode(&dev);
- if (rslt != BME280_OK)
- {
- fprintf(stderr, "Failed to stream sensor data (code %+d).\n", rslt);
- exit(1);
- }
- return 0;
-}
+/*\r
+ * Linux userspace test code, simple and mose code directy from the doco.\r
+ * compile like this: gcc linux_userspace.c ../bme280.c -I ../ -o bme280\r
+ * tested: Raspberry Pi.\r
+ * Use like: ./bme280 /dev/i2c-0\r
+ */\r
+#include "bme280.h"\r
+#include <string.h>\r
+#include <stdio.h>\r
+#include <stdlib.h>\r
+#include <unistd.h>\r
+#ifdef __KERNEL__\r
+#include <linux/i2c-dev.h>\r
+#include <sys/ioctl.h>\r
+#endif\r
+#include <sys/types.h>\r
+#include <fcntl.h>\r
+\r
+int fd;\r
+\r
+int8_t user_i2c_read(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len);\r
+void user_delay_ms(uint32_t period);\r
+int8_t user_i2c_write(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len);\r
+void print_sensor_data(struct bme280_data *comp_data);\r
+int8_t stream_sensor_data_forced_mode(struct bme280_dev *dev);\r
+\r
+int8_t user_i2c_read(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len)\r
+{\r
+ write(fd, ®_addr, 1);\r
+ read(fd, data, len);\r
+\r
+ return 0;\r
+}\r
+\r
+void user_delay_ms(uint32_t period)\r
+{\r
+ usleep(period * 1000);\r
+}\r
+\r
+int8_t user_i2c_write(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len)\r
+{\r
+ int8_t *buf;\r
+\r
+ buf = malloc(len + 1);\r
+ buf[0] = reg_addr;\r
+ memcpy(buf + 1, data, len);\r
+ if (write(fd, buf, len + 1) < len)\r
+ return BME280_E_COMM_FAIL;\r
+ free(buf);\r
+ return BME280_OK;\r
+}\r
+\r
+void print_sensor_data(struct bme280_data *comp_data)\r
+{\r
+ float temp, press, hum;\r
+#ifdef BME280_FLOAT_ENABLE\r
+ temp = comp_data->temperature;\r
+ press = 0.01 * comp_data->pressure;\r
+ hum = comp_data->humidity;\r
+#else\r
+#ifdef BME280_64BIT_ENABLE\r
+ temp = 0.01f * comp_data->temperature;\r
+ press = 0.0001f * comp_data->pressure;\r
+ hum = 1.0f / 1024.0f * comp_data->humidity;\r
+#else\r
+ temp = 0.01f * comp_data->temperature;\r
+ press = 0.01f * comp_data->pressure;\r
+ hum = 1.0f / 1024.0f * comp_data->humidity;\r
+#endif\r
+#endif\r
+ printf("%0.2lf deg C, %0.2lf hPa, %0.2lf%%\n", temp, press, hum);\r
+}\r
+\r
+int8_t stream_sensor_data_forced_mode(struct bme280_dev *dev)\r
+{\r
+ int8_t rslt;\r
+ uint8_t settings_sel;\r
+ struct bme280_data comp_data;\r
+\r
+ /* Recommended mode of operation: Indoor navigation */\r
+ dev->settings.osr_h = BME280_OVERSAMPLING_1X;\r
+ dev->settings.osr_p = BME280_OVERSAMPLING_16X;\r
+ dev->settings.osr_t = BME280_OVERSAMPLING_2X;\r
+ dev->settings.filter = BME280_FILTER_COEFF_16;\r
+\r
+ settings_sel = BME280_OSR_PRESS_SEL | BME280_OSR_TEMP_SEL | BME280_OSR_HUM_SEL | BME280_FILTER_SEL;\r
+\r
+ rslt = bme280_set_sensor_settings(settings_sel, dev);\r
+ if (rslt != BME280_OK)\r
+ {\r
+ fprintf(stderr, "Failed to set sensor settings (code %+d).", rslt);\r
+ return rslt;\r
+ }\r
+\r
+ printf("Temperature, Pressure, Humidity\n");\r
+ /* Continuously stream sensor data */\r
+ while (1)\r
+ {\r
+ rslt = bme280_set_sensor_mode(BME280_FORCED_MODE, dev);\r
+ if (rslt != BME280_OK)\r
+ {\r
+ fprintf(stderr, "Failed to set sensor mode (code %+d).", rslt);\r
+ break;\r
+ }\r
+ /* Wait for the measurement to complete and print data @25Hz */\r
+ dev->delay_ms(40);\r
+ rslt = bme280_get_sensor_data(BME280_ALL, &comp_data, dev);\r
+ if (rslt != BME280_OK)\r
+ {\r
+ fprintf(stderr, "Failed to get sensor data (code %+d).", rslt);\r
+ break;\r
+ }\r
+ print_sensor_data(&comp_data);\r
+ }\r
+\r
+ return rslt;\r
+}\r
+\r
+int main(int argc, char* argv[])\r
+{\r
+ struct bme280_dev dev;\r
+ int8_t rslt = BME280_OK;\r
+\r
+ if (argc < 2)\r
+ {\r
+ fprintf(stderr, "Missing argument for i2c bus.\n");\r
+ exit(1);\r
+ }\r
+ \r
+ // make sure to select BME280_I2C_ADDR_PRIM\r
+ // or BME280_I2C_ADDR_SEC as needed\r
+ dev.dev_id =\r
+#if 1\r
+ BME280_I2C_ADDR_PRIM\r
+#else\r
+ BME280_I2C_ADDR_SEC\r
+#endif\r
+;\r
+\r
+ dev.intf = BME280_I2C_INTF;\r
+ dev.read = user_i2c_read;\r
+ dev.write = user_i2c_write;\r
+ dev.delay_ms = user_delay_ms;\r
+\r
+ if ((fd = open(argv[1], O_RDWR)) < 0)\r
+ {\r
+ fprintf(stderr, "Failed to open the i2c bus %s\n", argv[1]);\r
+ exit(1);\r
+ }\r
+#ifdef __KERNEL__\r
+ if (ioctl(fd, I2C_SLAVE, dev.dev_id) < 0)\r
+ {\r
+ fprintf(stderr, "Failed to acquire bus access and/or talk to slave.\n");\r
+ exit(1);\r
+ }\r
+#endif\r
+\r
+ rslt = bme280_init(&dev);\r
+ if (rslt != BME280_OK)\r
+ {\r
+ fprintf(stderr, "Failed to initialize the device (code %+d).\n", rslt);\r
+ exit(1);\r
+}\r
+ rslt = stream_sensor_data_forced_mode(&dev);\r
+ if (rslt != BME280_OK)\r
+ {\r
+ fprintf(stderr, "Failed to stream sensor data (code %+d).\n", rslt);\r
+ exit(1);\r
+ }\r
+ return 0;\r
+}\r
projects / BME280_driver / blobdiff