66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
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/*
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* Software PWM using soft-interrupt timer1.
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* Supports higher frequencies compared to Espressif provided one.
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*
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* Nikolay Fiykov
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*/
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#ifndef __PWM2_H__
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#define __PWM2_H__
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#include <stdint.h>
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#include "pin_map.h"
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typedef struct {
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uint32_t offInterruptCounter;
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uint32_t pulseInterruptCcounter;
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uint32_t currentInterruptCounter;
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uint16_t gpioMask;
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} pwm2_pin_interrupt_t;
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typedef struct {
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pwm2_pin_interrupt_t pin[GPIO_PIN_NUM];
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uint16_t enabledGpioMask;
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} pwm2_interrupt_handler_data_t;
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typedef struct {
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uint32_t pulseResolutions;
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uint32_t divisableFrequency;
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uint32_t frequencyDivisor;
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uint32_t duty;
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uint32_t resolutionCPUTicks;
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uint32_t resolutionInterruptCounterMultiplier;
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} pwm2_pin_setup_t;
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typedef struct {
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pwm2_pin_setup_t pin[GPIO_PIN_NUM];
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uint32_t interruptTimerCPUTicks;
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uint32_t interruptTimerTicks;
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bool isStarted;
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} pwm2_setup_data_t;
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typedef struct {
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pwm2_interrupt_handler_data_t interruptData;
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pwm2_setup_data_t setupData;
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} pwm2_module_data_t;
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// driver's public API
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void pwm2_init();
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pwm2_module_data_t *pwm2_get_module_data();
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bool pwm2_is_pin_setup(const uint8_t pin);
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void pwm2_setup_pin(
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const uint8_t pin,
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const uint32_t divisableFreq,
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const uint32_t freqDivisor,
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const uint32_t resolution,
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const uint32_t initDuty
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);
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void pwm2_release_pin(const uint8_t pin);
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void pwm2_stop();
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bool pwm2_start();
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bool pwm2_is_started();
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void pwm2_set_duty(const uint8_t pin, const uint32_t duty);
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#endif
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