2 * BSD userspace test code, simple and mose code directy from the doco.
\r
3 * compile like this: cc bsd_userspace.c ../bme280.c -I ../ -o bme280
\r
4 * tested: NanoPi NEO.
\r
5 * Use like: ./bme280 /dev/iic0
\r
12 #include <sys/types.h>
\r
15 #include <sys/ioctl.h>
\r
16 #include <dev/iicbus/iic.h>
\r
20 int8_t user_i2c_read(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len);
\r
21 void user_delay_ms(uint32_t period);
\r
22 int8_t user_i2c_write(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len);
\r
23 void print_sensor_data(struct bme280_data *comp_data);
\r
24 int8_t stream_sensor_data_forced_mode(struct bme280_dev *dev);
\r
27 int8_t user_i2c_read(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len)
\r
29 struct iic_msg msgs[2] = {
\r
30 {id << 1 | IIC_M_WR, IIC_M_WR, 1, ®_addr},
\r
31 {id << 1 | IIC_M_RD, IIC_M_RD, len, data},
\r
34 struct iic_rdwr_data rdwr_data = {msgs, 2};
\r
36 int error = ioctl(fd, I2CRDWR, &rdwr_data);
\r
38 return BME280_E_COMM_FAIL;
\r
45 void user_delay_ms(uint32_t period)
\r
47 usleep(period * 1000);
\r
51 int8_t user_i2c_write(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len)
\r
53 uint8_t *buf = malloc( (1 + len) * sizeof(uint8_t) );
\r
55 return BME280_E_COMM_FAIL;
\r
60 for (int i = 0; i < len; i++) {
\r
66 msg.slave = id << 1 | !IIC_M_RD;
\r
67 msg.flags = !IIC_M_RD;
\r
68 msg.len = (1 + len) * sizeof(uint8_t);
\r
71 struct iic_rdwr_data rdwr_data = {&msg, 1};
\r
73 int error = ioctl(fd, I2CRDWR, &rdwr_data);
\r
76 return BME280_E_COMM_FAIL;
\r
85 void print_sensor_data(struct bme280_data *comp_data)
\r
87 float temp, press, hum;
\r
88 #ifdef BME280_FLOAT_ENABLE
\r
89 temp = comp_data->temperature;
\r
90 press = 0.01 * comp_data->pressure;
\r
91 hum = comp_data->humidity;
\r
93 #ifdef BME280_64BIT_ENABLE
\r
94 temp = 0.01f * comp_data->temperature;
\r
95 press = 0.0001f * comp_data->pressure;
\r
96 hum = 1.0f / 1024.0f * comp_data->humidity;
\r
98 temp = 0.01f * comp_data->temperature;
\r
99 press = 0.01f * comp_data->pressure;
\r
100 hum = 1.0f / 1024.0f * comp_data->humidity;
\r
103 printf("%0.2lf deg C, %0.2lf hPa, %0.2lf%%\n", temp, press, hum);
\r
107 int8_t stream_sensor_data_forced_mode(struct bme280_dev *dev)
\r
110 uint8_t settings_sel;
\r
111 struct bme280_data comp_data;
\r
113 /* Recommended mode of operation: Indoor navigation */
\r
114 dev->settings.osr_h = BME280_OVERSAMPLING_1X;
\r
115 dev->settings.osr_p = BME280_OVERSAMPLING_16X;
\r
116 dev->settings.osr_t = BME280_OVERSAMPLING_2X;
\r
117 dev->settings.filter = BME280_FILTER_COEFF_16;
\r
119 settings_sel = BME280_OSR_PRESS_SEL | BME280_OSR_TEMP_SEL | BME280_OSR_HUM_SEL | BME280_FILTER_SEL;
\r
121 rslt = bme280_set_sensor_settings(settings_sel, dev);
\r
122 if (rslt != BME280_OK)
\r
124 fprintf(stderr, "Failed to set sensor settings (code %+d).", rslt);
\r
128 printf("Temperature, Pressure, Humidity\n");
\r
129 /* Continuously stream sensor data */
\r
132 rslt = bme280_set_sensor_mode(BME280_FORCED_MODE, dev);
\r
133 if (rslt != BME280_OK)
\r
135 fprintf(stderr, "Failed to set sensor mode (code %+d).", rslt);
\r
138 /* Wait for the measurement to complete and print data @25Hz */
\r
140 rslt = bme280_get_sensor_data(BME280_ALL, &comp_data, dev);
\r
141 if (rslt != BME280_OK)
\r
143 fprintf(stderr, "Failed to get sensor data (code %+d).", rslt);
\r
146 print_sensor_data(&comp_data);
\r
147 dev->delay_ms(1000);
\r
155 int main(int argc, char* argv[])
\r
157 struct bme280_dev dev;
\r
158 int8_t rslt = BME280_OK;
\r
162 fprintf(stderr, "Missing argument for i2c bus.\n");
\r
166 // make sure to select BME280_I2C_ADDR_PRIM
\r
167 // or BME280_I2C_ADDR_SEC as needed
\r
170 BME280_I2C_ADDR_PRIM
\r
172 BME280_I2C_ADDR_SEC
\r
176 dev.intf = BME280_I2C_INTF;
\r
177 dev.read = user_i2c_read;
\r
178 dev.write = user_i2c_write;
\r
179 dev.delay_ms = user_delay_ms;
\r
182 if ((fd = open(argv[1], O_RDWR)) < 0)
\r
184 fprintf(stderr, "Failed to open the i2c bus %s\n", argv[1]);
\r
188 rslt = bme280_init(&dev);
\r
189 if (rslt != BME280_OK)
\r
191 fprintf(stderr, "Failed to initialize the device (code %+d).\n", rslt);
\r
195 rslt = stream_sensor_data_forced_mode(&dev);
\r
196 if (rslt != BME280_OK)
\r
198 fprintf(stderr, "Failed to stream sensor data (code %+d).\n", rslt);
\r