pwm_in.h

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#ifndef _PWM_IN_H_
#define _PWM_IN_H_

#include <hal.h>
#include "hal_types.h"
#include <stdbool.h>
#include <strings.h>
#include "timer.h"


#ifdef __cplusplus
  extern "C" {
#endif

typedef struct PULSE {
    unsigned int length:15;
    bool state:1;
} Pulse;

#define PULSES_QUEUE_SIZE (25*12*2) // 1 full frame by 25 bytes (12 bits, 2 measures per bit) each

#include "ring_buffer_pulse.h"


struct PPM_State  {
    Handler handler;
    uint32_t last_pulse;    // time of edge
    volatile pulse_buffer pulses;   // ring buffer
    uint16_t last_val;      // length 
    uint8_t state;          // 1 or 0
    Pulse pulse_mem[PULSES_QUEUE_SIZE]; // memory
};

extern struct PPM_State PPM_Inputs[];


struct TIM_Channel {
    uint8_t pin;       // pin number
}; 

extern const struct TIM_Channel PWM_Channels[];
#define PWM_CHANNELS (sizeof(PWM_Channels) / sizeof(struct TIM_Channel) )
 

void pwmInit(bool ppmsum);

bool getPPM_Pulse(Pulse *p, uint8_t ch);
uint16_t getPPM_count(uint8_t ch);

static inline void pwm_setHandler(Handler handler, uint8_t ch){
    PPM_Inputs[ch].handler = handler;
}

#ifdef __cplusplus
  }
#endif

#endif