pru.h

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#ifndef PRU_H_
#define PRU_H_

#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <math.h>
#include <pruss_intc_mapping.h>
#include <prussdrv.h>
#include <pthread.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ipc.h>
#include <sys/mman.h>
#include <sys/select.h>
#include <sys/shm.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>

#include "ambient.h"
#include "calibration.h"
#include "file_handling.h"
#include "log.h"
#include "meter.h"
#include "sem.h"
#include "types.h"
#include "util.h"
#include "web.h"

// ------  ADC DEFINITIONS  ------ //

#define WAKEUP 0x02000000
#define STANDBY 0x04000000
#define RESET 0x06000000
#define START 0x08000000
#define STOP 0x0A000000
#define OFFSETCAL 0x1A000000
#define RDATAC 0x10000000
#define SDATAC 0x11000000
#define RDATA 0x12000000
#define RREG 0x20000000
#define WREG 0x40000000

#define ID 0x00000000
#define CONFIG1 0x01000000
#define CONFIG2 0x02000000
#define CONFIG3 0x03000000
#define CH1SET 0x05000000
#define CH2SET 0x06000000
#define CH3SET 0x07000000
#define CH4SET 0x08000000
#define CH5SET 0x09000000
#define CH6SET 0x0A000000
#define CH7SET 0x0B000000
#define CH8SET 0x0C000000

#define GAIN1 0x1000
#define GAIN2 0x2000
#define GAIN12 0x6000

#define K1 0x0600
#define K2 0x0500
#define K4 0x0400
#define K8 0x0300
#define K16 0x0200
#define K32 0x0100
#define K64 0x0000

#define CONFIG1DEFAULT 0x9000
#define CONFIG2DEFAULT 0xE000
#define CONFIG3DEFAULT 0xE800

// ------  FILES  ------ //

#define MMAP_FILE "/sys/class/uio/uio0/maps/map1/"
#define PRU_CODE "/lib/firmware/rocketlogger_spi.bin"

// ------  PRU DEFINES  ------ //

#define PRECISION_HIGH 24
#define PRECISION_LOW 16

#define SIZE_HIGH 4
#define SIZE_LOW 2

#define VALID_MASK 0x1
#define BINARY_MASK 0xE

#define PRU_TIMEOUT 3

typedef enum pru_state {
    PRU_OFF = 0,       
    PRU_LIMIT = 1,     
    PRU_CONTINUOUS = 3 
} rl_pru_state;

#define NUMBER_ADC_COMMANDS 12

struct pru_data_struct {
    rl_pru_state state;
    uint32_t precision;
    uint32_t sample_size;
    uint32_t buffer0_location;
    uint32_t buffer1_location;
    uint32_t buffer_size;
    uint32_t sample_limit;
    uint32_t number_commands;
    uint32_t commands[NUMBER_ADC_COMMANDS];
};

// ------  FUNCTIONS  ------ //

void* pru_wait_event(void* voidEvent);
int pru_wait_event_timeout(unsigned int event, unsigned int timeout);

void pru_set_state(rl_pru_state state);
int pru_init(void);
int pru_data_setup(struct pru_data_struct* pru, struct rl_conf* conf,
                   uint32_t avg_factor);

int pru_sample(FILE* data, FILE* ambient_file, struct rl_conf* conf,
               char* file_comment);

void pru_stop(void);
void pru_close(void);

#endif /* PRU_H_ */