stmbl/shared/comps/vel_int.c

#include "commands.h"
#include "hal.h"
#include "math.h"
#include "defines.h"
#include "angle.h"

HAL_COMP(vel_int);

HAL_PIN(pos_in);
HAL_PIN(pos_out);

HAL_PIN(vel_in);
HAL_PIN(vel_out);

HAL_PIN(wd);
HAL_PIN(error);

struct vel_int_ctx_t {
  float pos;
  float counter;
};

static void nrt_init(volatile void *ctx_ptr, volatile hal_pin_inst_t *pin_ptr) {
  struct vel_int_ctx_t *ctx      = (struct vel_int_ctx_t *)ctx_ptr;
  struct vel_int_pin_ctx_t *pins = (struct vel_int_pin_ctx_t *)pin_ptr;

  ctx->pos     = 0.0;
  ctx->counter = 0.0;
  PIN(pos_in)  = 0.0;
  PIN(pos_out) = 0.0;

  PIN(vel_in)  = 0.0;
  PIN(vel_out) = 0.0;

  PIN(wd)    = 0.002;
  PIN(error) = 0.0;
}

static void rt_func(float period, volatile void *ctx_ptr, volatile hal_pin_inst_t *pin_ptr) {
  struct vel_int_ctx_t *ctx      = (struct vel_int_ctx_t *)ctx_ptr;
  struct vel_int_pin_ctx_t *pins = (struct vel_int_pin_ctx_t *)pin_ptr;

  float p = PIN(pos_in);
  float v = PIN(vel_in);

  if(ctx->counter > PIN(wd) && v != 0.0) {
    v          = 0;
    PIN(error) = 1.0;
  } else {
    PIN(error) = 0.0;
    ctx->counter += period;
  }

  if(EDGE(p)) {
    ctx->counter = 0.0;
    ctx->pos     = p;
  } else {
    ctx->pos += v * period;
  }

  ctx->pos = mod(ctx->pos);

  PIN(pos_out) = ctx->pos;
  PIN(vel_out) = v;
}

hal_comp_t vel_int_comp_struct = {
    .name      = "vel_int",
    .nrt       = 0,
    .rt        = rt_func,
    .frt       = 0,
    .nrt_init  = nrt_init,
    .rt_start  = 0,
    .frt_start = 0,
    .rt_stop   = 0,
    .frt_stop  = 0,
    .ctx_size  = sizeof(struct vel_int_ctx_t),
    .pin_count = sizeof(struct vel_int_pin_ctx_t) / sizeof(struct hal_pin_inst_t),
};