hyperion.ng/libsrc/leddevice/LedDeviceTinkerforge.cpp

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// STL includes
#include <cerrno>
#include <cstring>
// Local LedDevice includes
#include "LedDeviceTinkerforge.h"
static const unsigned MAX_NUM_LEDS = 320;
static const unsigned MAX_NUM_LEDS_SETTABLE = 16;
LedDeviceTinkerforge::LedDeviceTinkerforge(const std::string & host, uint16_t port, const std::string & uid, const unsigned interval)
: LedDevice()
, _host(host)
, _port(port)
, _uid(uid)
, _interval(interval)
, _ipConnection(nullptr)
, _ledStrip(nullptr)
, _colorChannelSize(0)
{
// empty
}
LedDeviceTinkerforge::~LedDeviceTinkerforge()
{
// Close the device (if it is opened)
if (_ipConnection != nullptr && _ledStrip != nullptr)
{
switchOff();
}
// Clean up claimed resources
delete _ipConnection;
delete _ledStrip;
}
int LedDeviceTinkerforge::open()
{
// Check if connection is already createds
if (_ipConnection != nullptr)
{
Error(_log, "Attempt to open existing connection; close before opening");
return -1;
}
// Initialise a new connection
_ipConnection = new IPConnection;
ipcon_create(_ipConnection);
int connectionStatus = ipcon_connect(_ipConnection, _host.c_str(), _port);
if (connectionStatus < 0)
{
Warning(_log, "Attempt to connect to master brick (%s:%d) failed with status %d", _host.c_str(), _port, connectionStatus);
return -1;
}
// Create the 'LedStrip'
_ledStrip = new LEDStrip;
led_strip_create(_ledStrip, _uid.c_str(), _ipConnection);
int frameStatus = led_strip_set_frame_duration(_ledStrip, _interval);
if (frameStatus < 0)
{
Error(_log,"Attempt to connect to led strip bricklet (led_strip_set_frame_duration()) failed with status %d", frameStatus);
return -1;
}
return 0;
}
int LedDeviceTinkerforge::write(const std::vector<ColorRgb> &ledValues)
{
unsigned nrLedValues = ledValues.size();
if (nrLedValues > MAX_NUM_LEDS)
{
Error(_log,"Invalid attempt to write led values. Not more than %d leds are allowed.", MAX_NUM_LEDS);
return -1;
}
if (_colorChannelSize < nrLedValues)
{
_redChannel.resize(nrLedValues, uint8_t(0));
_greenChannel.resize(nrLedValues, uint8_t(0));
_blueChannel.resize(nrLedValues, uint8_t(0));
}
_colorChannelSize = nrLedValues;
auto redIt = _redChannel.begin();
auto greenIt = _greenChannel.begin();
auto blueIt = _blueChannel.begin();
for (const ColorRgb &ledValue : ledValues)
{
*redIt = ledValue.red;
++redIt;
*greenIt = ledValue.green;
++greenIt;
*blueIt = ledValue.blue;
++blueIt;
}
return transferLedData(_ledStrip, 0, _colorChannelSize, _redChannel.data(), _greenChannel.data(), _blueChannel.data());
}
int LedDeviceTinkerforge::switchOff()
{
std::fill(_redChannel.begin(), _redChannel.end(), 0);
std::fill(_greenChannel.begin(), _greenChannel.end(), 0);
std::fill(_blueChannel.begin(), _blueChannel.end(), 0);
return transferLedData(_ledStrip, 0, _colorChannelSize, _redChannel.data(), _greenChannel.data(), _blueChannel.data());
}
int LedDeviceTinkerforge::transferLedData(LEDStrip *ledStrip, unsigned index, unsigned length, uint8_t *redChannel, uint8_t *greenChannel, uint8_t *blueChannel)
{
if (length == 0 || index >= length || length > MAX_NUM_LEDS)
{
return E_INVALID_PARAMETER;
}
uint8_t reds[MAX_NUM_LEDS_SETTABLE];
uint8_t greens[MAX_NUM_LEDS_SETTABLE];
uint8_t blues[MAX_NUM_LEDS_SETTABLE];
for (unsigned i=index; i<length; i+=MAX_NUM_LEDS_SETTABLE)
{
const unsigned copyLength = (i + MAX_NUM_LEDS_SETTABLE > length) ? length - i : MAX_NUM_LEDS_SETTABLE;
memcpy(reds, redChannel + i, copyLength);
memcpy(greens, greenChannel + i, copyLength);
memcpy(blues, blueChannel + i, copyLength);
const int status = led_strip_set_rgb_values(ledStrip, i, copyLength, reds, greens, blues);
if (status != E_OK)
{
Warning(_log, "Setting led values failed with status %d", status);
return status;
}
}
return E_OK;
}