| .. _fade-led-sample: |
| |
| PWM: Fade LED |
| ############# |
| |
| Overview |
| ******** |
| |
| This is a sample app which fades a LED using PWM. |
| |
| The LED will start from dark and increases its |
| brightness gradually for 10 seconds. Then, the |
| brightness reduces gradually for 10 seconds and |
| finally the LED becomes dark again. The LED will |
| repeat this cycle for ever. |
| |
| Wiring |
| ****** |
| |
| Nucleo_F401RE, Nucleo_L476RG |
| ============================ |
| 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. |
| |
| Nucleo_H743ZI |
| ============= |
| No special board setup is necessary because the on-board red LED is connected |
| to PWM output 12 (channel 1). |
| |
| Hexiwear K64 |
| ============ |
| No special board setup is necessary because there is an on-board RGB LED |
| connected to the K64 PWM. |
| |
| nrf52840dk_nrf52840 |
| =================== |
| No special board setup is necessary because there is an on-board LED connected. |
| |
| Building and Running |
| ******************** |
| |
| This sample can be built for multiple boards, in this example we will build it |
| for the nrf52840dk_nrf52840 board: |
| |
| .. zephyr-app-commands:: |
| :zephyr-app: samples/basic/fade_led |
| :board: nrf52840dk_nrf52840 |
| :goals: build flash |
| :compact: |
