BSD example

diff --git a/examples/bsd_userspace.c b/examples/bsd_userspace.c
new file mode 100644 (file)
index 0000000..5e32da3
--- /dev/null
+++ b/examples/bsd_userspace.c
@@ -0,0 +1,202 @@
+/*\r
+ * BSD userspace test code, simple and mose code directy from the doco.\r
+ * compile like this: cc bsd_userspace.c ../bme280.c -I ../ -o bme280\r
+ * tested: NanoPi NEO.\r
+ * Use like: ./bme280 /dev/iic0\r
+ */\r
+#include "bme280.h"\r
+#include <string.h>\r
+#include <stdio.h>\r
+#include <stdlib.h>\r
+#include <unistd.h>\r
+#include <sys/types.h>\r
+#include <fcntl.h>\r
+\r
+#include <sys/ioctl.h>\r
+#include <dev/iicbus/iic.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
+\r
+int8_t user_i2c_read(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len)\r
+{\r
+    struct iic_msg msgs[2] = {\r
+        {id << 1 | IIC_M_WR, IIC_M_WR, 1, &reg_addr},\r
+        {id << 1 | IIC_M_RD, IIC_M_RD, len, data},\r
+    };\r
+\r
+    struct iic_rdwr_data rdwr_data = {msgs, 2};\r
+\r
+    int error = ioctl(fd, I2CRDWR, &rdwr_data);\r
+    if (error) {\r
+        return BME280_E_COMM_FAIL;\r
+    }\r
+\r
+    return BME280_OK;\r
+}\r
+\r
+\r
+void user_delay_ms(uint32_t period)\r
+{\r
+    usleep(period * 1000);\r
+}\r
+\r
+\r
+int8_t user_i2c_write(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len)\r
+{\r
+    uint8_t *buf = malloc( (1 + len) * sizeof(uint8_t) );\r
+    if (buf == NULL) {\r
+        return BME280_E_COMM_FAIL;\r
+    }\r
+\r
+    buf[0] = reg_addr;\r
+\r
+    for (int i = 0; i < len; i++) {\r
+        buf[i+1] = data[i];\r
+    }\r
+\r
+    struct iic_msg msg;\r
+\r
+    msg.slave = id << 1 | !IIC_M_RD;\r
+    msg.flags = !IIC_M_RD;\r
+    msg.len = (1 + len) * sizeof(uint8_t);\r
+    msg.buf = buf;\r
+\r
+    struct iic_rdwr_data rdwr_data = {&msg, 1};\r
+\r
+    int error = ioctl(fd, I2CRDWR, &rdwr_data);\r
+    if (error) {\r
+        free(buf);\r
+        return BME280_E_COMM_FAIL;\r
+    }\r
+\r
+    free(buf);\r
+\r
+    return BME280_OK;\r
+}\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
+\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
+        dev->delay_ms(1000);\r
+    }\r
+\r
+    return rslt;\r
+}\r
+\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
+\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
+\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
+\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