41b54d8594
18392: drivers/servo: reimplement with high level interface r=benpicco a=maribu ### Contribution description The previous servo driver didn't provide any benefit over using PWM directly, as users controlled the servo in terms of PWM duty cycles. This changes the interface to provide a high level interface that abstracts the gory PWM details. In addition, a SAUL layer and auto-initialization is provided. ### Testing procedure The test application provides access to the servo driver via the `saul` shell command. ``` > saul 2022-08-02 22:12:31,826 # saul 2022-08-02 22:12:31,827 # ID Class Name 2022-08-02 22:12:31,830 # #0 ACT_SWITCH LD1(green) 2022-08-02 22:12:31,832 # #1 ACT_SWITCH LD2(blue) 2022-08-02 22:12:31,834 # #2 ACT_SWITCH LD3(red) 2022-08-02 22:12:31,837 # #3 SENSE_BTN B1(User button) 2022-08-02 22:12:31,838 # #4 ACT_SERVO servo > saul write 4 0 2022-08-02 22:12:41,443 # saul write 4 0 2022-08-02 22:12:41,445 # Writing to device #4 - servo 2022-08-02 22:12:41,447 # Data: 0 2022-08-02 22:12:41,450 # [servo] setting 0 to 2949 (0 / 255) 2022-08-02 22:12:41,453 # data successfully written to device #4 > saul write 4 256 2022-08-02 22:12:45,343 # saul write 4 256 2022-08-02 22:12:45,346 # Writing to device #4 - servo 2022-08-02 22:12:45,347 # Data: 256 2022-08-02 22:12:45,351 # [servo] setting 0 to 6865 (255 / 255) 2022-08-02 22:12:45,354 # data successfully written to device #4 ``` Each write resulted in the MG90S servo that I connected to move to the corresponding position. ### Issues/PRs references Co-authored-by: Marian Buschsieweke <marian.buschsieweke@ovgu.de> |
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The friendly Operating System for IoT!
RIOT is a real-time multi-threading operating system that supports a range of devices that are typically found in the Internet of Things (IoT): 8-bit, 16-bit and 32-bit microcontrollers.
RIOT is based on the following design principles: energy-efficiency, real-time capabilities, small memory footprint, modularity, and uniform API access, independent of the underlying hardware (this API offers partial POSIX compliance).
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