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