alex/esp-idf
1
0
Fork 0
mirror of https://github.com/espressif/esp-idf.git synced 2025-08-14 22:16:46 +00:00
Code Issues Packages Projects Releases Wiki Activity

feat(i2c_master): Add an api for retrieveing handle via port

Browse Source
This commit is contained in:
C.S.M
2024-10-25 16:06:15 +08:00
parent ff673e8016
commit cecfd7a4a0
6 changed files with 81 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
docs/en/api-reference/peripherals/i2c.rst
View File

@@ -134,6 +134,26 @@ Once the :cpp:type:`i2c_device_config_t` structure is populated with mandatory p
i2c_master_dev_handle_t dev_handle;
ESP_ERROR_CHECK(i2c_master_bus_add_device(bus_handle, &dev_cfg, &dev_handle));
Get I2C master handle via port
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Given that i2c master handle has been initialized in some module(e.g. an audio module), an another module(e.g. a video module) is not convenient to reused the handle. We have a helper function, :cpp:func:`i2c_master_get_bus_handle` for getting the initialized handle via port. However, please make sure the handle has already been initialized ahead of time. Otherwise an error would be reported.
.. code:: c
// Source File 1
#include "driver/i2c_master.h"
i2c_master_bus_handle_t bus_handle;
i2c_master_bus_config_t i2c_mst_config = {
... // same as others
};
ESP_ERROR_CHECK(i2c_new_master_bus(&i2c_mst_config, &bus_handle));
// Source File 2
#include "driver/i2c_master.h"
i2c_master_bus_handle_t handle;
ESP_ERROR_CHECK(i2c_master_get_bus_handle(0, &handle));
Uninstall I2C master bus and device
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~