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#PROTEUS 7 SEGMENT PCB HOW TO#
Due to its popularity, I decided to make a very detailed tutorial on how to use the common Anode and common Cathode seven segments with Arduino. Common Anode and common cathode type seven segment displays are widely used in electronic meter, Temperature display system, RPM monitoring gadgets, digital clocks, and other electronic devices that display numerical information. In this tutorial, you will learn how to use a seven segment display with Arduino Uno.
#PROTEUS 7 SEGMENT PCB SERIES#
You can interface a series of seven segment display’s with the single port of stm32 and control them with individual pins of stm32 for displaying numbers from 0 to 100. You can make a clock with seven segment display. Between each character a delay of 1 second is inserted to clearly see the character/number on seven segment display. All the other characters are displayed in the same form. The seven segment pin-g will turn off and all the other becomes on, making 0 on seven segment display. What happens is when this word is written to port-a of stm32. Pin-6 of port-a is connected to seven segment display pin-g. The highest port-a pin(6) will be written 0 and all the other remains high. So 011 1111 are written to first seven bits of stm32 microcontroller port-a. We are concerned with only first 7 pins of stm32 since we are using them in the project. The least bit starts from right and goes to the left highest. Each binary bit is written to individual pin of port-a of stm32.
If we translate it to its equivalent binary the command translates to 0000 0000 0011 1111.
#PROTEUS 7 SEGMENT PCB CODE#
The above code writes a 16-bit word to Port-A of stm32 microcontoller. I uploaded the code in microcontroller using stlink v2 debugger. Since i am using common anode 7 segment display so the 3.3 volt output pin of stm32 is connected to com pin of seven segment display.
Port-A pin#4 is connected to pin-e of 7 segment display.Port-A pin#3 is connected to pin-d of 7 segment display.Port-A pin#2 is connected to pin-c of 7 segment display.Port-A pin#1 is connected to pin-b of 7 segment display.Port-A pin#0 is connected to pin-a of 7 segment display.Luckily port-a pins from 0 to 6 are present on the board and they are enough for our project need. Port-A of stm32f103 has 16 GPIO pins but only 12 are exposed on the board. Though in the board not all the GPIO pins of stm32f103 microcontroller are exposed but still it has pretty fair amount of GPIO pins to work with. The board which i am using in the project is in the below circuit diagram.
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