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Rewrote the class to make it work with apa102 led strips

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Former-commit-id: 9f63b95fb635b15e550d9368c7c8dbc632572bc5
This commit is contained in:
wayland 2014-12-11 13:48:14 +01:00
parent a4bcdcc10a
commit 63d0f6652e
2 changed files with 16 additions and 20 deletions
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31
libsrc/leddevice/LedDeviceAPA102.cpp
View File

@ -13,35 +13,30 @@
LedDeviceAPA102::LedDeviceAPA102(const std::string& outputDevice, const unsigned baudrate) :
LedSpiDevice(outputDevice, baudrate, 500000),
mLedCount(0)
_ledBuffer(0)
{
// empty
}
int LedDeviceAPA102::write(const std::vector<ColorRgb> &ledValues)
{
mLedCount = ledValues.size();
const unsigned dataLen = 8 + (ledValues.size() * (sizeof(ColorRgb) + 1));
const uint8_t data[dataLen] = { 0x00, 0x00, 0x00, 0x00 };
int position = 4;
for (ColorRgb* rgb : ledValues ){
data[i++] = 0xFF;
data[i++] = rgb.red;
data[i++] = rgb.green;
data[i++] = rgb.blue;
const unsigned int mLedCount = (ledValues.size() * 4) + 8;
if(_ledBuffer.size() != mLedCount){
_ledBuffer.resize(mLedCount, 0x00);
}
// Write end frame
data[i++] = 0xFF;
data[i++] = 0xFF;
data[i++] = 0xFF;
data[i++] = 0xFF;
for (unsigned iLed=1; iLed<=ledValues.size(); ++iLed) {
const ColorRgb& rgb = ledValues[iLed];
_ledBuffer[iLed*4] = 0xFF;
_ledBuffer[iLed*4+1] = rgb.red;
_ledBuffer[iLed*4+2] = rgb.green;
_ledBuffer[iLed*4+3] = rgb.blue;
}
return writeBytes(dataLen, data);
return writeBytes(_ledBuffer.size(), _ledBuffer.data());
}
int LedDeviceAPA102::switchOff()
{
return write(std::vector<ColorRgb>(mLedCount, ColorRgb{0,0,0}));
return write(std::vector<ColorRgb>(_ledBuffer.size(), ColorRgb{0,0,0}));
}

5
libsrc/leddevice/LedDeviceAPA102.h
View File

@ -36,6 +36,7 @@ public:
private:
/// the number of leds (needed when switching off)
size_t mLedCount;
/// The buffer containing the packed RGB values
std::vector<uint8_t> _ledBuffer;
};