How to use ADC on STM32?

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How to use ADC on STM32?

To do that you will need the following:

  1. Enable the ADC clock.
  2. Enable the GPIO clock for the pin you want to use.
  3. Configure the GPIO pin as an analog input.
  4. Configure the ADC speed (prescaler/sample time)
  5. Enable continuous measurement mode.

What is ADC in STM32?

One of the most common peripherals on many modern microcontrollers is the analog-to-digital converter (ADC). These embedded devices read an analog voltage (usually somewhere between 0 V and the given reference voltage) and report it as a binary value.

What is DMA in ADC?

› The Direct Memory Access (DMA) transfers data from data source locations. to data destination locations without intervention of the CPU or other on-chip devices. › A DMA channel performs transactions.

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What is DMA in STM32?

The Direct memory access (DMA) embedded in the STM32G0 microcontrollers is used to provide high-speed data transfers between peripherals and memory and between memory and memory. Data can be quickly moved by the DMA without any CPU action.

How do you set up ADC?

To get the ADC to work, we need to do the following tasks:

  1. Configure I/O pins as analog input(s) and configure ADC reference.
  2. Configure ADC registers to choose an analog pin.
  3. Configure ADC registers to enable the ADC.
  4. Configure ADC registers to set the acquisition time.

What is ADC DMA?

The DMA is used to transfer ADC measurements results to LMURAM. At the end of an analog-to-digital conversion of the VADC module, an interrupt is triggered, which starts the data transfer of the converted ADC results via DMA to the LMURAM. The ADC conversion is started manually via a command of a serial monitor.

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What is UART DMA?

The DMA module is used to transfer data received from the UART to LMURAM. The CPU sends a message via UART in loopback mode. When it receives the message back, it triggers an interrupt which starts the data transfer via DMA.

What is DMA stm32?

What are the features of STM32 USART?

High-speed data communication is possible by using the DMA for multi-buffer configuration. 2.2 STM32 USART Main Features Full duplex, asynchronous communications Fractional baud rate generator systems – A common programmable transmit and receive baud rates up to 4.5 MBits/s

How to use the DMA method to send UART data?

Now, it comes the time to use the DMA method. Using the DMA unit in order to direct the received serial UART data from the UART peripheral directly to the memory is considered to be the most efficient way to do such a task. It requires no CPU intervention at all, you’ll have only to set it up and go execute the main application code.

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What are the different modes of DMA in STM32?

DMA in STM32 can work in normal or circular mode. For each mode, it requires number of elements to transfer before events are triggered. Normal mode: In this mode, DMA starts transferring data and when it transfers all elements, it stops.

How do I get the STM32 to take an ADC reading?

For the few demonstrations that follow, we will need a Nucleo board (I’m using a Nucleo-L476RG) and a potentiometer connected to A0: Getting the STM32 to take 1 ADC reading is relatively straightforward. Start a new project in STM32CubeIDE with C. Change PA10 (which is connected to header pin D2) to GPIO_Output.