flinklib.h

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/*******************************************************************
 *   _________     _____      _____    ____  _____    ___  ____    *
 *  |_   ___  |  |_   _|     |_   _|  |_   \|_   _|  |_  ||_  _|   *
 *    | |_  \_|    | |         | |      |   \ | |      | |_/ /     *
 *    |  _|        | |   _     | |      | |\ \| |      |  __'.     *
 *   _| |_        _| |__/ |   _| |_    _| |_\   |_    _| |  \ \_   *
 *  |_____|      |________|  |_____|  |_____|\____|  |____||____|  *
 *                                                                 *
 *******************************************************************
 *                                                                 *
 *  flink userspace library, public header file                    *
 *                                                                 *
 *******************************************************************/

#ifndef FLINKLIB_H_
#define FLINKLIB_H_

#include <stdint.h>
#include <sys/types.h>

#ifdef __cplusplus
extern "C" {
#endif

// ############ Device handles ############

typedef struct _flink_dev    flink_dev;
typedef struct _flink_subdev flink_subdev;


// ############ Base operations ############

flink_dev* flink_open(const char* file_name);
int        flink_close(flink_dev* dev);


// ############ Low level operations ############

int     flink_ioctl(flink_dev* dev, int cmd, void* arg);
ssize_t flink_read(flink_subdev* subdev, uint32_t offset, uint8_t size, void* rdata);
ssize_t flink_write(flink_subdev* subdev, uint32_t offset, uint8_t size, void* wdata);
int     flink_read_bit(flink_subdev* subdev, uint32_t offset, uint8_t bit, void* rdata);
int     flink_write_bit(flink_subdev* subdev, uint32_t offset, uint8_t bit, void* wdata);


// ############ Subdevice operations ############

#define REGISTER_WITH                       4   // byte
#define HEADER_SIZE                         16  // byte
#define SUBHEADER_SIZE                      16  // byte
#define STATUS_OFFSET                       0x0010  // byte
#define CONFIG_OFFSET                       0x0014  // byte
#define INFO_DESC_SIZE                      28      // byte
#define PWM_BASECLK_OFFSET                  0x0000  // byte
#define PWM_FIRSTPWM_OFFSET                 0x0004  // byte
#define ANALOG_INPUT_FIRST_VALUE_OFFSET     0x0004  // byte
#define ANALOG_OUTPUT_FIRST_VALUE_OFFSET    0x0004  // byte
#define WD_FIRST_COUNTER_OFFSET             0x0004  // byte
#define RESET_BIT                           0

#define NONEXCL_ACCESS                      0
#define EXCL_ACCESS                         1

// General
int           flink_get_nof_subdevices(flink_dev* dev);
flink_subdev* flink_get_subdevice_by_id(flink_dev* dev, uint8_t subdev_id);
flink_subdev* flink_get_subdevice_by_unique_id(flink_dev* dev, uint8_t unique_id);

uint8_t       flink_subdevice_get_id(flink_subdev* subdev);
uint16_t      flink_subdevice_get_function(flink_subdev* subdev);
uint8_t       flink_subdevice_get_subfunction(flink_subdev* subdev);
uint8_t       flink_subdevice_get_function_version(flink_subdev* subdev);
uint32_t      flink_subdevice_get_baseaddr(flink_subdev* subdev);
uint32_t      flink_subdevice_get_memsize(flink_subdev* subdev);
uint32_t      flink_subdevice_get_nofchannels(flink_subdev* subdev);
uint32_t      flink_subdevice_get_unique_id(flink_subdev* subdev);
int           flink_subdevice_select(flink_subdev* subdev, uint8_t exclusive);
int           flink_subdevice_reset(flink_subdev* subdev);
const char*   flink_subdevice_id2str(uint8_t subdev_id);

// Info
int flink_info_get_description(flink_subdev* subdev, char* value);

// Analog input
int flink_analog_in_get_resolution(flink_subdev* subdev, uint32_t* resolution);
int flink_analog_in_get_value(flink_subdev* subdev, uint32_t channel, uint32_t* value);

// Analog output
int flink_analog_out_get_resolution(flink_subdev* subdev, uint32_t* resolution);
int flink_analog_out_set_value(flink_subdev* subdev, uint32_t channel, uint32_t value);

// Digital in-/output
#define FLINK_OUTPUT 1
#define FLINK_INPUT 0
int flink_dio_set_direction(flink_subdev* subdev, uint32_t channel, uint8_t output);
int flink_dio_set_value(flink_subdev* subdev, uint32_t channel, uint8_t high);
int flink_dio_get_value(flink_subdev* subdev, uint32_t channel, uint8_t* value);

// Counter
int flink_counter_set_mode(flink_subdev* subdev, uint8_t mode);
int flink_counter_get_count(flink_subdev* subdev, uint32_t channel, uint32_t* data);

// PWM
int flink_pwm_get_baseclock(flink_subdev* subdev, uint32_t* frequency);
int flink_pwm_set_period(flink_subdev* subdev, uint32_t channel, uint32_t period);
int flink_pwm_set_hightime(flink_subdev* subdev, uint32_t channel, uint32_t hightime);

// Watchdog
int flink_wd_get_baseclock(flink_subdev* subdev, uint32_t* base_clk);
int flink_wd_get_status(flink_subdev* subdev, uint8_t* status);
int flink_wd_set_counter(flink_subdev* subdev, uint32_t value);
int flink_wd_arm(flink_subdev* subdev);


// ############ Exit states ############

#define EXIT_SUCCESS    0
#define EXIT_ERROR      -1

#ifdef __cplusplus
} // end extern "C"
#endif

#endif // FLINKLIB_H_