Exploring the Different Modes of TIMER Operation in STM32 N1

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This project is focused on exploring the different modes of TIMER operation on an STM32 microcontroller. The STM32 microcontroller is widely used in embedded systems and offers a powerful TIMER module that can be used for a variety of applications. The project specifically covers three TIMER modes: Periodic Interrupt, Counter, and Output Compare.

In the Periodic Interrupt mode, the TIMER generates an interrupt at a specified interval, allowing the microcontroller to perform a task periodically.

In the Counter mode, the TIMER counts the number of events that occur within a specified time period.

Finally, in the Output Compare mode, the TIMER generates an output signal when the TIMER value matches a specified compare value.

Through this project, you will learn how to program and utilize the TIMER module in these different modes on an STM32 microcontroller. The project includes simulation in Proteus, allowing you to test and verify the behavior of your TIMER code before implementing it in a physical embedded system.

Step One:

• Open CubeMX & Create New Project Choose The Target MCU STM32F103C6 & Double-Click Its Name
• Go To The Clock Configuration & Set The System Clock To 32MHz

Configuration for the TIMER Periodic Interrupt Mode:

• Configure The GPIO Pins PB3 as Output Pin
• In the Categories tab, select the TIM3 & enable Internal Clock
• In the Parameter settings tab, set the (Prescaler=1000 & Counter Peroid 32000) The purpose of this settings is to generate a periodic time event with a 100ms interval

• In the NVIC settings tab, Enable TIM3 global Interrupt

Configuration for the Timer Counter Mode:

• In the Categories tab, select the TIM1 & enable ETR2 in "Clock Source" the clock source is an external pin (timer1 input pin ETR2) which is highlighted as PA12.
• In the Parameter settings tab, set the (Counter Mode =up & Counter Peroid=10 & Auto-reload preload= Enable)
• In the NVIC settings tab, Enable TIM1 update Interrupt
• Enable USART1 Module (Asynchronous Mode)
• Set the USART1 and USART2 communication parameters (baud rate = 9600, parity=NON, stop bits =1, and word length =8bits)

Configuration for the Timer Output Compare Mode:

• In the Categories tab, select the TIM2 & Enable Output Compare for Channel 2 and 4
• In the Parameter settings tab, set the (Prescaler=3200-1 & Counter Peroid 1000)
• In the Outpute Compare Channel 2 set the (Mode=Toggle on match & Pulse 200 & Output compare preload = Enable)
• In the Outpute Compare Channel 4 set the (Mode=Toggle on match & Pulse 400 & Output compare preload = Enable)
• Generate The Initialization Code & Open The Project In CubeIDE
• Write The Application Layer Code

In file name :main.c

In file name : stm32f1xx_it.c

You can access the source code files via this link.

Step Two:

• Open Proteus & Create New Project and click next

• Click on Pick Device
• Search for STM32F103C6 & SW-SPDT(switch) & LED_RED & Button & RES

• Click on Virtual Instruments Mode then choose VIRTUAL TERMINAL

• Click on Terminal Mode then choose (DEFAULT & POWER &GROUND)

• finally make the circuit below and start the simulation

That's all!

If you have any questions or suggestions don't hesitate to leave a comment below