Does STM32 have ADC?
STM32 microcontrollers embed advanced 12-bit or 16-bit ADCs (depending on the device). A self-calibration feature is provided to enhance ADC accuracy versus environmental condition changes. In applications involving analog-to-digital conversion, ADC accuracy has an impact on the overall system quality and efficiency.
How many ADC channels are in STM32?
STM32 ADC Brief It has up to 18 multiplexed channels allowing it to measure signals from sixteen external and two internal sources. A/D conversion of the various channels can be performed in single, continuous, scan, or discontinuous mode.
How does DMA work 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.
What is the ADC size of STM32 and how many channels are there?
To measure a three-phase power, ADC1 and ADC2 are used with 6 channels (3 channels for the voltage and 3 channels for the current). The dual fast interleaved ADC mode is intended for the conversion of one channel.
What is a channel in an ADC?
The ADC converts an analog input voltage to a 10-bit digital value. The ADC is connected to an 8-channel Analog Multiplexer which allows each pin of PortA to be used as input for the ADC. The analog input channel is selected by writing to the MUX bits in ADMUX.
What is gain and offset?
Offset adds or subtracts a constant value to your signal. Gain multiplies your signal by a constant factor.
What is offset in DAC?
DAC Offset Error is a measure of the difference between the actual VOUT and the ideal VOUT in the linear region of the transfer function. Offset error can be negative or positive in the DAC and output amplifier.
What are STM32 microcontrollers?
STM32 microcontrollers have one of the most advanced ADCs on the microcontroller market. You could imagine a multitude of applications based on the STM32 ADC features. Some ADC modes are provided to simplify measurements and give efficient results in applications such as motor control.
What is the samplingtime of the STM32 ADC?
For The Previous example where Tconv = 1µs, The samplingRate = 1000000 = 1Ms/sec The STM32 ADC has a resolution of 12-Bit which results in a total conversion time of SamplingTime+12.5 clock cycles.
What is interrupt in STM32 ADC?
STM32 ADC Interrupts An interrupt can be produced on the end of conversion for regular and injected groups and when the analog watchdog status bit is set. Separate interrupt enable bits are available for flexibility.
Do I need to calibrate the STM32 Hal after startup?
It is recommended to perform a calibration after each power-up. The STM32 HAL does provide a function within the ADC APIs dedicated to starting the calibration process and as said before it’s a recommended step after initializing the ADC hardware at the system power-up.