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https://github.com/zephyrproject-rtos/zephyr
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e2b38e02bf
Enable HW PWM driver instead of the SW one on nRF SoCs where the PWM peripheral is present. Default PWM instances are also enabled on Nordic DK boards so that it is possible to build the basic fade_led sample for them without extra adjustments. After the above changes are applied, some configuration alterations in basic samples blink_led and fade_led become no longer needed. These are removed. And the blink_led sample is corrected so that it works with the nRF HW PWM driver as well. Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no> |
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| src | ||
| CMakeLists.txt | ||
| prj.conf | ||
| README.rst | ||
| sample.yaml | ||
.. _blink-led-sample: PWM: Blink LED ############## Overview ******** This is a sample app which blinks a LED using PWM. The LED will start at a blinking frequency of 1 Hz. Every 4 seconds, the blinking frequency will double. When the blinking frequency reaches 64 Hz, the blinking frequency will be halved every 4 seconds until the blinking frequency reaches 1 Hz. This completes a whole blinking cycle. This faster-then-slower LED blinking cycle repeats forever. Wiring ****** Nucleo_F401RE, Nucleo_L476RG, STM32F4_DISCOVERY, Nucleo_F302R8 ============================================================== Connect PWM2(PA0) to LED Nucleo_F103RB ============= Connect PWM1(PA8) to LED Nucleo_L496ZG ============= No special board setup is necessary because there are three on-board LEDs (red, green, blue) connected to the Nucleo's PWM. Hexiwear K64 ============ No special board setup is necessary because there is an on-board RGB LED connected to the K64 PWM. nrf52840_pca10056 ================= No special board setup is necessary because there is an on-board LED connected. Arduino 101 and Quark D2000 CRB =============================== You will need to connect the LED to ground and PWM0 via the shield. You may need a current limiting resistor. See your LED datasheet. Building and Running ******************** This sample can be built for multiple boards, in this example we will build it for the arduino_101 board: .. zephyr-app-commands:: :zephyr-app: samples/basic/blink_led :board: nrf52840_pca10056 :goals: build flash :compact: After flashing the image to the board, the user LED on the board should start to blinking as discussed in overview