README
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These examples are designed to demonstrate the use of libopencm3
with the STM32F4Discovery-DISCO board. This board has a 2.2"
TFT LCD touchscreen on it, a MEMS gyroscope, and 8MB of SDRAM.
If you move through the examples in this order, the code from
the previous example will be used in the next example:
0) blink - verify that you can build a program, link it, and
download it to the board. Blinks the GREEN LED at about
2Hz
1) systick_blink - Clock setup, Systick setup, LED GPIO setup
and blinking.
2) usart - Program a USART on the board as a console (requires
a digital to serial adapter)
3) usart-irq - Program a USART on the board as a console with
an interrupt driven receive routine. This allows you to
interrupt execution with ^C as you can on a Linux process.
4) sdram - SDRAM setup, using the usb port as a console, which
sets up the SDRAM
5) spi - Serial Peripheral Interface example which talks to
the MEMS gyroscope on the DISCO board.
6) lcd-serial - Activates the TFT using the SPI port (serial) and
holds a frame buffer in the SDRAM area.
7) lcd - Now uses the new LCD "driver" peripheral to refresh
the contents with what is in memory, very fast, write in
memory and it appears on screen.
8) dma2d - The 2D graphics accelerator device which displays
various animations on the LCD using code from all of the
previous examples.
