rt_spi.h

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#ifndef _rt_spi
#define _rt_spi

#include <fcntl.h>      //Needed for SPI port
#include <sys/ioctl.h>  //Needed for SPI port

// incredibly obscure bug in SPI_IOC_MESSAGE macro is fixed by this
#ifdef __cplusplus /* If this is a C++ compiler, use C linkage */
extern "C" {
#endif

#include <linux/spi/spidev.h>

#ifdef __cplusplus /* If this is a C++ compiler, use C linkage */
}
#endif

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>  //Needed for SPI port
#include <spi_command_t.hpp>
#include <spi_data_t.hpp>
#include <spi_torque_t.hpp>

#define K_EXPECTED_COMMAND_SIZE 256
#define K_WORDS_PER_MESSAGE 66
#define K_EXPECTED_DATA_SIZE 116
#define K_KNEE_OFFSET_POS 4.35f

#define BYTE_TO_BINARY_PATTERN "%c%c%c%c%c%c%c%c"
#define BYTE_TO_BINARY(byte)                                \
  (byte & 0x80 ? '1' : '0'), (byte & 0x40 ? '1' : '0'),     \
      (byte & 0x20 ? '1' : '0'), (byte & 0x10 ? '1' : '0'), \
      (byte & 0x08 ? '1' : '0'), (byte & 0x04 ? '1' : '0'), \
      (byte & 0x02 ? '1' : '0'), (byte & 0x01 ? '1' : '0')

void init_spi();

void spi_send_receive(spi_command_t* command, spi_data_t* data);
void spi_driver_run();

spi_data_t* get_spi_data();
spi_command_t* get_spi_command();

typedef struct {
  float q_des_abad[2];
  float q_des_hip[2];
  float q_des_knee[2];
  float qd_des_abad[2];
  float qd_des_hip[2];
  float qd_des_knee[2];
  float kp_abad[2];
  float kp_hip[2];
  float kp_knee[2];
  float kd_abad[2];
  float kd_hip[2];
  float kd_knee[2];
  float tau_abad_ff[2];
  float tau_hip_ff[2];
  float tau_knee_ff[2];
  int32_t flags[2];
  int32_t checksum;

} spine_cmd_t;

typedef struct {
  float q_abad[2];
  float q_hip[2];
  float q_knee[2];
  float qd_abad[2];
  float qd_hip[2];
  float qd_knee[2];
  int32_t flags[2];
  int32_t checksum;

} spine_data_t;

#endif