#CHIBIOS USB SERIAL EXAMPLE DRIVERS#
#CHIBIOS USB SERIAL EXAMPLE DRIVER#

You will see both user LEDs flashing with an one second period, the green LED duty cycle can be adjusted using the potentiometer, the blue LED duty cycle is determined by the temperature and is driven by the STM32 internal sensor. Running the Demo The demo should run immediately after loading, if not then try disconnecting and reconnecting the board USB cable in order to reset it (older versions of ST visual programmer do not run the program automatically). If you are using the IAR Workbench or Keil uVision you can flash and debug the STM32F4-Discovery directly from you IDE (select ST-Link as probe and configure it in SWD mode). Program the STM32 flash memory with the demo application binary image. The application demonstrates the following tasks: The PWM outputs are connected to the board green and blue LEDs so you don't need any instrument to see the output.īy pressing the user button the test suite is activated and the output is transmitted over the serial port 1 (38400-8-N-1). The PWM is programmed with a cycle of exactly one second, the ADC samples modulate the two output channels with a duty cycle between 0 and 100 percent. The sampled data is also transmitted over the SPI bus (SPI1, CPOL=0, CPHA=0, 16bits frames, MSb first).

#CHIBIOS USB SERIAL EXAMPLE DRIVER#

The Demo Application The demo application samples two analog channels (AN11 and Temperature Sensor) using the ADC driver and modulates two PWM channels using the average of four samples per channel.

#CHIBIOS USB SERIAL EXAMPLE DRIVERS#

All drivers are “native” in order to minimize the memory footprint, the bulky ST library has not been used (but is supported). When the USB cable is plugged in, so you can use you favourite serial.

I have created a simple example where I use ChibiOS on my rf boards. A Simple USART example for printing on the serial port. ChibiOS/RT examples running on STM32F4 Discovery board.

Chibios usb serial example