This project investigates how external triggers enhance STM32 ADC functionality. By synchronizing ADC conversions with external events, the system demonstrates improved efficiency, flexibility, and real-time responsiveness. The STM32F103C6 reads analog input from a potentiometer, with conversions triggered by EXTI interrupts, and results displayed via UART.
External triggers are widely applied in industrial automation, IoT, and embedded monitoring systems, where precise and event-driven data acquisition is crucial.
STM32CubeMX Setup- Target MCU: STM32F103C6Tx
- Clock Configuration: System clock = 8 MHz
- GPIO Configuration:
- PA2 → Output (Status LED)
- PA3 → Output (Loop LED)
- ADC1 Configuration:
- Channel: IN7
- Mode: Regular Conversion
- External Trigger Source: EXTI Line 11
- NVIC Settings:
- Enable ADC1/ADC2 global interrupts
- Enable EXTI Line [15:10] interrupts
- UART1 Configuration:
- Baud Rate: 115200
- Mode: Asynchronous
- Word Length: 8 bits, Stop Bits: 1, Parity: None
- Generate Initialization Code
- Initialize peripherals: ADC, UART, GPIO, NVIC
- Configure ADC in interrupt mode
- Use EXTI button press to trigger ADC conversions
- Transmit ADC result to UART on conversion complete
- Toggle LEDs to indicate loop execution and conversion activity
- Build and generate the .hex file
- Create new schematic
- Add components:
- STM32F103C6 MCU
- Potentiometer → ADC IN7
- Push Button → EXTI Line 11 (PB11)
- LEDs → PA2, PA3
- Virtual Terminal → USART1 TX/RX
- Load the generated .hex file into STM32
- Run simulation:
- Adjust potentiometer to vary ADC input
- Press button to trigger ADC conversion
- Observe LED activity and UART results on Virtual Terminal
If you have any questions or suggestions don't hesitate to leave a comment below
Comments