mirror of
https://github.com/DarkFlippers/unleashed-firmware
synced 2024-11-23 21:13:16 +00:00
d92b0a82cc
"A long time ago in a galaxy far, far away...." we started NFC subsystem refactoring. Starring: - @gornekich - NFC refactoring project lead, architect, senior developer - @gsurkov - architect, senior developer - @RebornedBrain - senior developer Supporting roles: - @skotopes, @DrZlo13, @hedger - general architecture advisors, code review - @Astrrra, @doomwastaken, @Hellitron, @ImagineVagon333 - quality assurance Special thanks: @bettse, @pcunning, @nxv, @noproto, @AloneLiberty and everyone else who has been helping us all this time and contributing valuable knowledges, ideas and source code.
122 lines
3.5 KiB
C
122 lines
3.5 KiB
C
/**
|
|
* @file digital_signal.h
|
|
* @brief Simple digital signal container for the DigitalSequence library.
|
|
*
|
|
* Each signal is represented by its start level (high or low) and one or more periods.
|
|
* The output will transition to its inverse value on each period boundary.
|
|
*
|
|
* Example: A signal with n periods and HIGH start level.
|
|
*
|
|
* ```
|
|
* ----+ +------+ +- ... -+
|
|
* t0 | t1 | t2 | t3 | | tn - 1
|
|
* +--------+ +----+ +--------
|
|
* ```
|
|
*
|
|
*/
|
|
#pragma once
|
|
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
// DigitalSignal uses 10 picosecond time units (1 tick = 10 ps).
|
|
// Use the macros below to convert the time from other units.
|
|
|
|
#define DIGITAL_SIGNAL_MS(x) ((x)*100000000UL)
|
|
#define DIGITAL_SIGNAL_US(x) ((x)*100000UL)
|
|
#define DIGITAL_SIGNAL_NS(x) ((x)*100UL)
|
|
#define DIGITAL_SIGNAL_PS(x) ((x) / 10UL)
|
|
|
|
typedef struct DigitalSignal DigitalSignal;
|
|
|
|
/**
|
|
* @brief Allocate a DigitalSignal instance with a defined maximum size.
|
|
*
|
|
* @param[in] max_size the maximum number of periods the instance will be able to contain.
|
|
* @returns pointer to the allocated instance.
|
|
*/
|
|
DigitalSignal* digital_signal_alloc(uint32_t max_size);
|
|
|
|
/**
|
|
* @brief Delete a previously allocated DigitalSignal instance.
|
|
*
|
|
* @param[in,out] signal pointer to the instance to be deleted.
|
|
*/
|
|
void digital_signal_free(DigitalSignal* signal);
|
|
|
|
/**
|
|
* @brief Append one period to the end of the DigitalSignal instance.
|
|
*
|
|
* @param[in,out] signal pointer to a the instance to append to.
|
|
* @param[in] ticks the period length, in 10 picosecond units.
|
|
*/
|
|
void digital_signal_add_period(DigitalSignal* signal, uint32_t ticks);
|
|
|
|
/**
|
|
* @brief Append one period to the end of the DigitalSignal instance, with the level specified.
|
|
*
|
|
* If the level is the same as the last level contained in the instance, then it is extened
|
|
* by the given ticks value. Otherwise, the behaviour is identical to digital_signal_add_period().
|
|
*
|
|
* Example 1: add tc with HIGH level
|
|
* ```
|
|
* before:
|
|
* ... ------+
|
|
* ta | tb
|
|
* +-------
|
|
* after:
|
|
* ... ------+ +-------
|
|
* ta | tb | tc
|
|
* +------+
|
|
* ```
|
|
* Example 2: add tc with LOW level
|
|
* ```
|
|
* before:
|
|
* ... ------+
|
|
* ta | tb
|
|
* +-------
|
|
* after:
|
|
* ... ------+
|
|
* ta | tb + tc
|
|
* +--------------
|
|
* ```
|
|
*
|
|
* @param[in,out] signal pointer to the instance to append to.
|
|
* @param[in] ticks the period length, in 10 picosecond units.
|
|
* @param[in] level the level to be set during the period.
|
|
*/
|
|
void digital_signal_add_period_with_level(DigitalSignal* signal, uint32_t ticks, bool level);
|
|
|
|
/**
|
|
* @brief Get the current start level contained in the DigitalSignal instance.
|
|
*
|
|
* If not explicitly set with digital_signal_set_start_level(), it defaults to false.
|
|
*
|
|
* @param[in] signal pointer to the instance to be queried.
|
|
* @returns the start level value.
|
|
*/
|
|
bool digital_signal_get_start_level(const DigitalSignal* signal);
|
|
|
|
/**
|
|
* @brief Set the start level contained in the DigitalSignal instance.
|
|
*
|
|
* @param[in,out] signal pointer to the instance to be modified.
|
|
* @param[in] level signal level to be set as the start level.
|
|
*/
|
|
void digital_signal_set_start_level(DigitalSignal* signal, bool level);
|
|
|
|
/**
|
|
* @brief Get the number of periods currently stored in a DigitalSignal instance.
|
|
*
|
|
* @param[in] signal pointer to the instance to be queried.
|
|
* @return the number of periods stored in the instance.
|
|
*/
|
|
uint32_t digital_signal_get_size(const DigitalSignal* signal);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|