LibLapin

The hardware module is desined to establish a link between a Velleman VM110N and your program, to (later) use the board of an RPI or (later) exploit a connected arduino.

You may need to be super user.

The hardware module header is lapin/hardware.h.

typedef struct s_bunny_vm110n
{
     const void *const _private;
     const int id;
     const bool digital_inputs[5];
     const double analog_inputs[2];
     bool digital_outputs[8];
     double analog_outputs[2];

} t‌_‌b‌u‌n‌n‌y‌_‌v‌m‌1‌1‌0‌n;

Description

This structure represents the VM110N board. It is partially abstract. Some fields are read only and are modified only by the bunny vm110n functions, some can be modified to change the board status.

Attributes

const void *const _private:
Private field you should not modify or your program may crash.
const int id:
The id of the board. Four boards can be supported.
const bool digital_inputs[5]:
The status of digital inputs on the board.
const double analog_inputs[2]:
The status of analog inputs on the board. Analog values varies between 0 and 1.
bool digital_outputs[8];
Editable field that allow you to set a board status on some pins. After editing this field, calling b‌u‌n‌n‌y‌_‌v‌m‌1‌1‌0‌n‌_‌w‌r‌i‌t‌e will transform your values into reality.
double analog_outputs[2]:
Editable field that allow you to set a board status on some pins. After editing this field, calling b‌u‌n‌n‌y‌_‌v‌m‌1‌1‌0‌n‌_‌w‌r‌i‌t‌e will transform your values into reality. Analog values can varies between 0 and 1.

Related functions

INDEX

t‌_‌b‌u‌n‌n‌y‌_‌v‌m‌1‌1‌0‌n *b‌u‌n‌n‌y‌_‌n‌e‌w‌_‌v‌m‌1‌1‌0‌n(size_t id);

Description

Open a link with a connected VM110N with the sent id. The returned data must be freed with b‌u‌n‌n‌y‌_‌d‌e‌l‌e‌t‌e‌_‌v‌m‌1‌1‌0‌n.

Parameters

size_t id:
The id of the board, depending of jumpers on it.

Return value

On success, the function returns a valid t‌_‌b‌u‌n‌n‌y‌_‌v‌m‌1‌1‌0‌n.
On failure, it returns NULL.

Error values and logs

On error, $Vb‌u‌n‌n‌y‌_‌e‌r‌r‌n‌o is set to:

ENOMEM:

Out of memory.
BE_CANT_GENERATE_RESSOURCE:

Cannot connect to the board with the sent id. It may be because there is no board, because the id is bad or because you do not have the right to connect to a USB device (And then, running your process as root will make this call successful)

Logs written by this function are tagged with the "vm110n" label.