alex/BME280_SensorAPI
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update milliseconds to microseconds

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zjli-2019 2021-11-11 17:54:55 +08:00
parent c47f06eb44
commit 5929add1f4
2 changed files with 11 additions and 11 deletions
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20
README.md
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@ -24,8 +24,8 @@ The sensor driver package includes bme280.c, bme280.h and bme280_defs.h files.
SPI 3-wire is currently not supported in the API.
## Usage guide
### Initializing the sensor
To initialize the sensor, user need to create a device structure. User can do this by
creating an instance of the structure bme280_dev. After creating the device strcuture, user
To initialize the sensor, user need to create a device structure. User can do this by
creating an instance of the structure bme280_dev. After creating the device strcuture, user
need to fill in the various parameters as shown below.
#### Example for SPI 4-Wire
@ -40,7 +40,7 @@ dev.intf_ptr = &dev_addr;
dev.intf = BME280_SPI_INTF;
dev.read = user_spi_read;
dev.write = user_spi_write;
dev.delay_ms = user_delay_ms;
dev.delay_us = user_delay_us;
rslt = bme280_init(&dev);
```
@ -54,7 +54,7 @@ dev.intf_ptr = &dev_addr;
dev.intf = BME280_I2C_INTF;
dev.read = user_i2c_read;
dev.write = user_i2c_write;
dev.delay_ms = user_delay_ms;
dev.delay_us = user_delay_us;
rslt = bme280_init(&dev);
```
@ -72,7 +72,7 @@ By default, 64 bit variant is used in the API. If the user wants 32 bit variant,
macro BME280_64BIT_ENABLE in bme280_defs.h file.
### Sensor data units
> The sensor data units depends on the following macros being enabled or not,
> The sensor data units depends on the following macros being enabled or not,
> (in bme280_defs.h file or as compiler macros)
> * BME280_FLOAT_ENABLE
> * BME280_64BIT_ENABLE
@ -112,7 +112,7 @@ int8_t stream_sensor_data_forced_mode(struct bme280_dev *dev)
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);
@ -122,7 +122,7 @@ int8_t stream_sensor_data_forced_mode(struct bme280_dev *dev)
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, dev->intf_ptr);
dev->delay_us(req_delay * 1000, dev->intf_ptr);
rslt = bme280_get_sensor_data(BME280_ALL, &comp_data, dev);
print_sensor_data(&comp_data);
}
@ -164,7 +164,7 @@ int8_t stream_sensor_data_normal_mode(struct bme280_dev *dev)
printf("Temperature, Pressure, Humidity\r\n");
while (1) {
/* Delay while the sensor completes a measurement */
dev->delay_ms(70, dev->intf_ptr);
dev->delay_us(70000, dev->intf_ptr);
rslt = bme280_get_sensor_data(BME280_ALL, &comp_data, dev);
print_sensor_data(&comp_data);
}
@ -185,11 +185,11 @@ void print_sensor_data(struct bme280_data *comp_data)
### Templates for function pointers
``` c
void user_delay_ms(uint32_t period, void *intf_ptr)
void user_delay_us(uint32_t period, void *intf_ptr)
{
/*
* Return control or wait,
* for a period amount of milliseconds
* for a period amount of microseconds
*/
}

2
examples/linux_userspace.c
View File

@ -316,7 +316,7 @@ int8_t stream_sensor_data_forced_mode(struct bme280_dev *dev)
}
/* Wait for the measurement to complete and print data */
dev->delay_us(req_delay, dev->intf_ptr);
dev->delay_us(req_delay * 1000, dev->intf_ptr);
rslt = bme280_get_sensor_data(BME280_ALL, &comp_data, dev);
if (rslt != BME280_OK)
{