hal_pwm.h

#ifndef CODEBASE_HAL_HAL_PWM_H_
#define CODEBASE_HAL_HAL_PWM_H_

#include "stdint.h"
#include "stdbool.h"
#include "nrf.h"

#ifdef NRF51
#error "nRF51 series SoCs don't have a PWM peripheral"
#endif

#if SYS_CFG_PRESENT == 1
#include "sys_config.h"
#endif
#ifndef HAL_PWM_PERIPH_USED 
#define HAL_PWM_PERIPH_USED 0
#endif


#define PWM_USED           HAL_PWM_PERIPH_USED

#define HAL_PWM_MAX_PIN_NUM     4

typedef enum
{
    HAL_PWM_FREQ_16MHz  = PWM_PRESCALER_PRESCALER_DIV_1,  
    HAL_PWM_FREQ_8MHz   = PWM_PRESCALER_PRESCALER_DIV_2,  
    HAL_PWM_FREQ_4MHz   = PWM_PRESCALER_PRESCALER_DIV_4,  
    HAL_PWM_FREQ_2MHz   = PWM_PRESCALER_PRESCALER_DIV_8,  
    HAL_PWM_FREQ_1MHz   = PWM_PRESCALER_PRESCALER_DIV_16, 
    HAL_PWM_FREQ_500kHz = PWM_PRESCALER_PRESCALER_DIV_32, 
    HAL_PWM_FREQ_250kHz = PWM_PRESCALER_PRESCALER_DIV_64, 
    HAL_PWM_FREQ_125kHz = PWM_PRESCALER_PRESCALER_DIV_128 
} hal_pwm_freq_t;

typedef enum
{
    HAL_PWM_MODE_UP      = PWM_MODE_UPDOWN_Up,
    HAL_PWM_MODE_UP_DOWN = PWM_MODE_UPDOWN_UpAndDown,
} hal_pwm_mode_t;

typedef enum
{
    HAL_PWM_SHORT_SEQEND0_STOP_MASK        = PWM_SHORTS_SEQEND0_STOP_Msk,
    HAL_PWM_SHORT_SEQEND1_STOP_MASK        = PWM_SHORTS_SEQEND1_STOP_Msk,
    HAL_PWM_SHORT_LOOPSDONE_SEQSTART0_MASK = PWM_SHORTS_LOOPSDONE_SEQSTART0_Msk,
    HAL_PWM_SHORT_LOOPSDONE_SEQSTART1_MASK = PWM_SHORTS_LOOPSDONE_SEQSTART1_Msk,
    HAL_PWM_SHORT_LOOPSDONE_STOP_MASK      = PWM_SHORTS_LOOPSDONE_STOP_Msk
} hal_pwm_short_mask_t;

typedef enum
{
    HAL_PWM_LOAD_COMMON     = PWM_DECODER_LOAD_Common,
    HAL_PWM_LOAD_GROUPED    = PWM_DECODER_LOAD_Grouped,
    HAL_PWM_LOAD_INDIVIDUAL = PWM_DECODER_LOAD_Individual,
    HAL_PWM_LOAD_WAVE_FORM  = PWM_DECODER_LOAD_WaveForm
} hal_pwm_decoder_load_t;

typedef enum
{
    HAL_PWM_STEP_INTERNAL = PWM_DECODER_MODE_RefreshCount,
    HAL_PWM_STEP_EXTERNAL = PWM_DECODER_MODE_NextStep
} hal_pwm_dec_trigger_t;

typedef struct
{
    uint16_t * seq_values;
    uint16_t len;
    uint32_t repeats;
    uint32_t end_delay;
} hal_pwm_sequence_config_t;

typedef enum
{
    HAL_PWM_IRQ_STOPPED_MASK      = PWM_INTENSET_STOPPED_Msk,
    HAL_PWM_IRQ_SEQSTARTED0_MASK  = PWM_INTENSET_SEQSTARTED0_Msk,
    HAL_PWM_IRQ_SEQSTARTED1_MASK  = PWM_INTENSET_SEQSTARTED1_Msk,
    HAL_PWM_IRQ_SEQEND0_MASK      = PWM_INTENSET_SEQEND0_Msk,
    HAL_PWM_IRQ_SEQEND1_MASK      = PWM_INTENSET_SEQEND1_Msk,
    HAL_PWM_IRQ_PWMPERIODEND_MASK = PWM_INTENSET_PWMPERIODEND_Msk,
    HAL_PWM_IRQ_LOOPSDONE_MASK    = PWM_INTENSET_LOOPSDONE_Msk
} hal_pwm_irq_mask_t;

typedef struct
{
    uint32_t * pins;
    bool * pin_idle_state;
    uint32_t pin_num;
    hal_pwm_freq_t oper_freq;
    hal_pwm_mode_t oper_mode;
    uint32_t irq_priority;
}hal_pwm_init_t;

typedef struct
{
    uint32_t countertop;
    uint32_t loop;
    uint32_t shorts_mask;
    uint32_t interrupt_masks;
    hal_pwm_decoder_load_t decoder_load;
    hal_pwm_dec_trigger_t decoder_trigger;
    hal_pwm_sequence_config_t seq_config[2];
    void (*irq_handler)(hal_pwm_irq_mask_t irq_source);
}hal_pwm_start_t;

void hal_pwm_init(hal_pwm_init_t * init_config);

void hal_pwm_start(hal_pwm_start_t * start_config);

void hal_pwm_stop(void);

#endif /* CODEBASE_HAL_HAL_PWM_H_ */