The STM32F103C8 microcontroller offers a built-in Analog-to-Digital Converter (ADC) that can be effectively utilized to measure analog voltages. Here's a step-by-step guide:
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Configuration: First, you need to enable the ADC clock and configure the ADC settings in the STM32CubeMX or directly in the code. This includes setting the resolution (such as 12 bits), the conversion mode (single or continuous), and the sampling time.
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Pin Assignment: Select the appropriate GPIO pin to which the analog voltage input will be connected. Make sure to configure this pin as an analog input.
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Initialization: In the code, initialize the ADC by setting up the necessary registers.
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Starting the Conversion: To start the conversion, trigger it either through software or by using an external trigger source.
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Reading the Conversion Result: After the conversion is complete, the result can be read from the corresponding register.
For example, let's say you want to measure the voltage of a potentiometer connected to a pin. You would set up the ADC to sample at a suitable rate, start the conversion when needed, and then read the digital value representing the analog voltage.
It's important to handle potential errors and perform calibration if necessary to ensure accurate measurements.
In conclusion, by following these steps and understanding the ADC functionality of the STM32F103C8, you can successfully measure analog voltages for various applications.