MAX7219 8 digit 7 segment display demo
This example for the max7219_spi_driver and max7219_spi_driver_extended library demonstrates controlling a MAX7219 or MAX7221 based display over SPI with basic and advanced text writing, and at least one example of every available display function in some capacity.
The MAX7219 and MAX7221 chipsets are used in many 8 character 7 segment and 8x8 single colour dot matrix displays which can be purchased preassembled on eBay and AliExpress very cheaply. The abundance and low cost of these displays makes them a great companion for small projects requiring a display output that is more capable than single LEDs but not as complex as something like an LCD.
The example expects you to connect a MAX7219 based 7 segment 8 character display to your CH32V003 like so:
-
DIN/MOSItoPC6 -
SCLKtoPC5 -
CStoPD0
You can choose which examples will be shown on the display by changing the spi_max7219.c file in the marked demo selection section. All examples are enabled by default.
Once running, you'll see one of the many examples being displayed like so:
