pru.h

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#ifndef PRU_H_
#define PRU_H_
 
#include <stdint.h>
#include <stdio.h>
 
#include "rl.h"
 
#define PRU_BINARY_FILE "/lib/firmware/rocketlogger.bin"
 
#define PRU_DIGITAL_SIZE 4
#define PRU_SAMPLE_SIZE 4
#define PRU_BUFFER_STATUS_SIZE 4
 
#define PRU_DIGITAL_INPUT_MASK 0x3F
#define PRU_DIGITAL_INPUT1_MASK 0x01
#define PRU_DIGITAL_INPUT2_MASK 0x02
#define PRU_DIGITAL_INPUT3_MASK 0x04
#define PRU_DIGITAL_INPUT4_MASK 0x08
#define PRU_DIGITAL_INPUT5_MASK 0x10
#define PRU_DIGITAL_INPUT6_MASK 0x20
#define PRU_DIGITAL_I1L_VALID_MASK 0x40
#define PRU_DIGITAL_I2L_VALID_MASK 0x80
 
#define PRU_TIMEOUT_US 2000000
 
enum pru_state {
    PRU_STATE_OFF = 0x00,               
    PRU_STATE_SAMPLE_FINITE = 0x01,     
    PRU_STATE_SAMPLE_CONTINUOUS = 0x03, 
};
 
typedef enum pru_state pru_state_t;
 
struct pru_control {
    pru_state_t state;
    uint32_t sample_rate;
    uint32_t sample_limit;
    uint32_t buffer_length;
    uint32_t buffer0_addr;
    uint32_t buffer1_addr;
};
 
typedef struct pru_control pru_control_t;
 
struct pru_data {
    uint32_t channel_digital;
    int32_t channel_analog[RL_CHANNEL_COUNT];
};
 
typedef struct pru_data pru_data_t;
 
struct pru_buffer {
    uint32_t index;
    pru_data_t const data[];
};
 
typedef struct pru_buffer pru_buffer_t;
 
int pru_init(void);
 
void pru_deinit(void);
 
int pru_control_init(pru_control_t *const pru_control,
                     rl_config_t const *const config, uint32_t aggregates);
 
int pru_set_state(pru_state_t state);
 
int pru_sample(FILE *data_file, FILE *ambient_file,
               rl_config_t const *const config);
 
void pru_stop(void);
 
#endif /* PRU_H_ */