mirror of
https://github.com/DarkFlippers/unleashed-firmware.git
synced 2024-12-18 19:01:47 +03:00
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.
113 lines
3.9 KiB
C
113 lines
3.9 KiB
C
/**
|
|
* @file digital_sequence.h
|
|
* @brief Fast and precise digital signal generation library.
|
|
*
|
|
* Each sequence is represented by one or more (up to 32) registered signals, which are addressed
|
|
* by their indices, and a list of signal indices to be transmitted.
|
|
*
|
|
* The registered signals must be set up prior to actually defining the sequence.
|
|
*
|
|
* Example: A sequence containing 4 registered signals and n indices to transmit.
|
|
*
|
|
* |Signal | Index |
|
|
* |:-----:|:-----:|
|
|
* | SOF | 0 |
|
|
* | EOF | 1 |
|
|
* | Zero | 2 |
|
|
* | One | 3 |
|
|
*
|
|
* ```
|
|
* Signal index | 0 | 3 | 2 | 2 | ... | 3 | 1 |
|
|
* 0 1 2 3 ... n - 2 n - 1
|
|
* ```
|
|
*
|
|
* The above sequence starts by transmitting the signal with index 0, which is SOF in this case,
|
|
* then it proceeds with indices 3, 2, 2, which are One, Zero, Zero and after n - 2 signals,
|
|
* it will conclude with indices 3 and 1 which are One and EOF respectively.
|
|
*
|
|
* This way, only the order in which the signals are sent is stored, while the signals themselves
|
|
* are not duplicated.
|
|
*/
|
|
#pragma once
|
|
|
|
#include <furi_hal_gpio.h>
|
|
|
|
#include <digital_signal/digital_signal.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
typedef struct DigitalSequence DigitalSequence;
|
|
|
|
/**
|
|
* @brief Allocate a DigitalSequence instance of a given size which will operate on a set GPIO pin.
|
|
*
|
|
* @param[in] size maximum number of signal indices contained in the instance.
|
|
* @param[in] gpio the GPIO pin used to generate the signal.
|
|
* @returns pointer to the allocated DigitalSequence instance.
|
|
*/
|
|
DigitalSequence* digital_sequence_alloc(uint32_t size, const GpioPin* gpio);
|
|
|
|
/**
|
|
* @brief Delete a previously allocated DigitalSequence instance.
|
|
*
|
|
* @param[in,out] sequence pointer to the instance to be deleted.
|
|
*/
|
|
void digital_sequence_free(DigitalSequence* sequence);
|
|
|
|
/**
|
|
* @brief Register a signal within a DigitalSequence instance by its index.
|
|
*
|
|
* This function must be called for each signal to be used in the sequence. The DigitalSequence
|
|
* instance does not own the signals, therefore, their lifetime must be no less than the instance's.
|
|
*
|
|
* The user is responsible for creation and deletion of DigitalSignal instances and
|
|
* also for keeping track of their respective indices.
|
|
*
|
|
* @param[in,out] sequence pointer to the instance to be modified.
|
|
* @param[in] signal_index index to register the signal under (must be less than 32).
|
|
* @param[in] signal pointer to the DigitalSignal instance to be registered.
|
|
*/
|
|
void digital_sequence_register_signal(
|
|
DigitalSequence* sequence,
|
|
uint8_t signal_index,
|
|
const DigitalSignal* signal);
|
|
|
|
/**
|
|
* @brief Append a signal index to a DigitalSequence instance.
|
|
*
|
|
* The signal under the index must be registered beforehand by calling digital_sequence_set_signal().
|
|
*
|
|
* @param[in,out] sequence pointer to the instance to be modified.
|
|
* @param[in] signal_index signal index to be appended to the sequence (must be less than 32).
|
|
*/
|
|
void digital_sequence_add_signal(DigitalSequence* sequence, uint8_t signal_index);
|
|
|
|
/**
|
|
* @brief Transmit the sequence contained in the DigitalSequence instance.
|
|
*
|
|
* Must contain at least one registered signal and one signal index.
|
|
*
|
|
* NOTE: The current implementation will properly initialise the GPIO provided during construction,
|
|
* but it is the caller's responsibility to reconfigure it back before reusing for other purposes.
|
|
* This is due to performance reasons.
|
|
*
|
|
* @param[in] sequence pointer to the sequence to be transmitted.
|
|
*/
|
|
void digital_sequence_transmit(DigitalSequence* sequence);
|
|
|
|
/**
|
|
* @brief Clear the signal sequence in a DigitalSequence instance.
|
|
*
|
|
* Calling this function does not un-register the registered signals, so it is
|
|
* safe to call digital_sequence_add_signal() right afterwards.
|
|
*
|
|
* @param[in,out] sequence pointer to the instance to be cleared.
|
|
*/
|
|
void digital_sequence_clear(DigitalSequence* sequence);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|