78 lines
2.8 KiB
C
78 lines
2.8 KiB
C
/**
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* Emit a pulse of precise length on a pin, using the RMT peripheral.
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*/
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#ifndef _RMT_PULSE_H_
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#define _RMT_PULSE_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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/******************************************************************************/
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/*** include files ***/
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/******************************************************************************/
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#include <stdint.h>
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#include <driver/gpio.h>
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#include <esp_attr.h>
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/******************************************************************************/
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/*** macro definitions ***/
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/******************************************************************************/
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/******************************************************************************/
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/*** type definitions ***/
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/******************************************************************************/
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/******************************************************************************/
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/*** exported variables ***/
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/******************************************************************************/
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/******************************************************************************/
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/*** exported functions ***/
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/******************************************************************************/
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/**
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* @brief Initializes RMT Channel 0 with a pin for RMT pulsing.
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*
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* @note The pin will have to be re-initialized if subsequently used as GPIO.
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*/
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void rmt_pulse_init(gpio_num_t pin);
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/**
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* @brief Outputs a single pulse (high -> low) on the configured pin.
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*
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* @note This function will always wait for a previous call to finish.
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*
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* @param high_time_us Pulse high time in us.
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* @param low_time_us Pulse low time in us.
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* @param wait Block until the pulse is finished.
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*/
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void IRAM_ATTR pulse_ckv_us(uint16_t high_time_us, uint16_t low_time_us, bool wait);
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/**
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* @brief Indicates if the rmt is currently sending a pulse.
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*/
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bool IRAM_ATTR rmt_busy();
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/**
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* @brief Outputs a single pulse (high -> low) on the configured pin.
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*
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* @note This function will always wait for a previous call to finish.
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*
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* @param high_time_us Pulse high time clock ticks.
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* @param low_time_us Pulse low time in clock ticks.
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* @param wait Block until the pulse is finished.
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*/
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void IRAM_ATTR pulse_ckv_ticks(uint16_t high_time_us, uint16_t low_time_us, bool wait);
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#ifdef __cplusplus
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}
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#endif
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#endif
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/******************************************************************************/
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/*** END OF FILE ***/
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/******************************************************************************/ |