2.8. ds18b20
— One-wire temperature sensor¶
Source code: src/drivers/ds18b20.h, src/drivers/ds18b20.c
Test code: tst/drivers/ds18b20/main.c
- Version
- 7.0.0
Functions
-
int
ds18b20_module_init
(void)¶ Initialize the DS18B20 driver module. This function must be called before calling any other function in this module.
The module will only be initialized once even if this function is called multiple times.
- Return
- zero(0) or negative error code.
-
int
ds18b20_init
(struct ds18b20_driver_t *self_p, struct owi_driver_t *owi_p)¶ Initialize given driver object.
- Return
- zero(0) or negative error code.
- Parameters
self_p
-Driver object to be initialized.
owi_p
-One-Wire (OWI) driver.
-
int
ds18b20_convert
(struct ds18b20_driver_t *self_p)¶ Start temperature convertion on all sensors.
- Return
- zero(0) or negative error code.
- Parameters
self_p
-Driver object to be initialized.
-
int
ds18b20_get_temperature
(struct ds18b20_driver_t *self_p, uint8_t *id_p, int *temp_p)¶ Get the temperature for given device identity.
- Return
- zero(0) or negative error code.
- Parameters
self_p
-Driver object to be initialized.
id_p
-Device identity.
temp_p
-Measured temperature in Q4.4 to Q8.4 depending on resolution.
-
char *
ds18b20_get_temperature_str
(struct ds18b20_driver_t *self_p, uint8_t *id_p, char *buf_p)¶ Get temperature for given device identity returned formatted as a string.
- Return
- Buffer or NULL.
- Parameters
self_p
-Driver object to be initialized.
id_p
-Device identity.
buf_p
-Buffer.
-
struct
ds18b20_driver_t
¶