2.16. owi
— One-Wire Interface¶
Source code: src/drivers/owi.h, src/drivers/owi.c
Test code: tst/drivers/owi/main.c
Functions
-
int
owi_init
(struct owi_driver_t *self_p, struct pin_device_t *dev_p, struct owi_device_t *devices_p, size_t nmemb)¶ Initialize driver object.
- Return
- zero(0) or negative error code.
- Parameters
self_p
-Driver object to be initialized.
dev_p
-Pin device to use.
devices_p
-Storage for devices found when searching.
nmemb
-Number of members in devices.
-
int
owi_reset
(struct owi_driver_t *self_p)¶ Send reset on one wire bus.
- Return
- true(1) if one or more devices are connected to the bus, false(0) if no devices were found, otherwise negative error code.
- Parameters
self_p
-Driver object.
-
int
owi_search
(struct owi_driver_t *self_p)¶ Search network for devices.
- Return
- Number of devices found or negative error code.
- Parameters
self_p
-Driver object.
-
ssize_t
owi_read
(struct owi_driver_t *self_p, void *buf_p, size_t size)¶ Read into buffer from one wire bus.
- Return
- Number of bits read or negative error code.
- Parameters
self_p
-Driver object.
buf_p
-Buffer to read into.
size
-Number of bits to read.
-
ssize_t
owi_write
(struct owi_driver_t *self_p, const void *buf_p, size_t size)¶ Write buffer to given one wire bus.
- Return
- Number of bits written or negative error code.
- Parameters
self_p
-Driver object.
buf_p
-Buffer to write.
size
-Number of bits to write.
-
struct
owi_driver_t
¶