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.
Nucleo_F401RE, Nucleo_L476RG, STM32F4_DISCOVERY, Nucleo_F302R8
Connect PWM2(PA0) to LED
Connect PWM1(PA8) to LED
No special board setup is necessary because there are three on-board LEDs (red,
green, blue) connected to the Nucleo’s PWM.
No special board setup is necessary because there is an on-board RGB LED
connected to the K64 PWM.
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 nrf52840_pca10056 board:
west build -b nrf52840_pca10056 samples/basic/blink_led
Using CMake and ninja:
cmake -B build -GNinja -DBOARD=nrf52840_pca10056 samples/basic/blink_led
ninja -C build
ninja -C build flash
After flashing the image to the board, the user LED on the board should start to
blinking as discussed in overview