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/**
* @file adc.hpp
* @brief Manages signal reading through the ADC.
*
* Copyright (C) 2023 Clyne Sullivan
*
* Distributed under the GNU GPL v3 or later. You should have received a copy of
* the GNU General Public License along with this program.
* If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef STMDSP_ADC_HPP_
#define STMDSP_ADC_HPP_
#include "hal.h"
#include "sclock.hpp"
#include <array>
class ADC
{
public:
using Operation = void (*)(adcsample_t *buffer, size_t count);
/**
* Initializes analog input pins and the microcontoller's ADC peripheral.
*/
static void begin();
/**
* Begins continuous ADC sampling triggered by SClock at the set sampling
* rate.
* @param buffer Pointer to buffer for sample data.
* @param count Number of samples that the buffer can hold.
* @param operation Handler function to operate on filled half-buffers.
*/
static void start(adcsample_t *buffer, size_t count, Operation operation);
/**
* Stops the continuous ADC sampling.
*/
static void stop();
/**
* Runs a single conversion on the "alt" inputs (parameter knobs).
* @param id The ID of the desired "alt" input (zero or one).
* @return The sampled value for the given input.
*/
static adcsample_t readAlt(unsigned int id);
/**
* Sets the desired sampling rate for the ADC to operate at.
*/
static void setRate(SClock::Rate rate);
/**
* Used to override the handler function for the currently running
* conversion.
*/
static void setOperation(Operation operation);
private:
// ADC driver for signal input.
static ADCDriver *m_driver;
// ADC driver for "alt" inputs.
static ADCDriver *m_driver2;
static const ADCConfig m_config;
static const ADCConfig m_config2;
static ADCConversionGroup m_group_config;
static ADCConversionGroup m_group_config2;
static adcsample_t *m_current_buffer;
static size_t m_current_buffer_size;
static Operation m_operation;
public:
static void conversionCallback(ADCDriver *);
};
#endif // STMDSP_ADC_HPP_
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