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