axis_xyzt

This structure is used to store the values of 3-axis accelerometers, but procedures have been added to increase convenience when stored in a container class.

struct axis_xyzt {
    int16_t x;
    int16_t y;
    int16_t z;
    uint16_t t;
};

get_axis_{x,y,z}_iter()

/*The return type is described as auto&& because it is a long template type name.*/
auto&& get_axis_x_iter(Iter p)
auto&& get_axis_y_iter(Iter p)
auto&& get_axis_z_iter(Iter p)

Generates an iterator that accesses an element on the X, Y, or Z axis using the iterator of the container class containing axis_xyzt as a parameter.

In the example below, buf.begin() and buf.end() are used as iterators for the X axis in the algorithm std::minmax_element.

#include <algorithm>

void myfunc() {  
  // container class
  smplbuf_local<axis_xyzt, 10> buf;
  
  // Submit data for testing
  buf[0] = { 1, 2, 3, 4 };
  buf[1] = { 2, 3, 4, 5 };
  ...
  
  // Algorithm to obtain maximum and minimum values
  auto&& minmax = std::minmax_element(
    get_axis_x_iter(buf.begin()),
    get_axis_x_iter(buf.end()));
  
  Serial << "min=" << int(*minmax.first)
        << ",max=" << int(*minmax.second) << mwx::crlf;
}

get_axis_{x,y,z}()

/*The return type is described as auto&& because it is a long template type name.*/
auto&& get_axis_x(T& c)
auto&& get_axis_y(T& c)
auto&& get_axis_z(T& c)

This function generates a virtual container class from which one of the XYZ axes of the container class containing axis_xyzt is taken. Only the begin() and end() methods are implemented in this generated class. The iterator that can be obtained by these begin() and end() methods is the same as the iterator in the previous section get_axis_{x,y,z}_iter().

#include <algorithm>

void myfunc() {
  // container class
  smplbuf_local<axis_xyzt, 10> buf;
  
  // Submit data for testing
  buf[0] = { 1, 2, 3, 4 };
  buf[1] = { 2, 3, 4, 5 };
  ...
  
  // Extract the X axis in the queue
  auto&& vx = get_axis_x(que);
  
  // Use of ranged for statement
  for (auto&& e : vx) { Serial << int(e) << ','; }
  
  // Algorithm to obtain maximum and minimum values
  auto&& minmax = std::minmax_element(
      vx.begin(), vx.end());
                          
  Serial << "min=" << int(*minmax.first)
        << ",max=" << int(*minmax.second) << mwx::crlf;
}