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Performance fixes for adalightapa102

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Adalightapa102 now inherits from RS232Device.
Due to bad initialization, previous CPU usage on RPI1 could reach 60%.
ON RPi2 20%. Now its about 3% with grabber in use.


Former-commit-id: 7ebb72f503ad74a7768deedf648b9e84c0a7cf3c
This commit is contained in:
tociek 2015-11-28 22:58:58 +01:00
parent e44db34969
commit e7c9d9decd
2 changed files with 18 additions and 7 deletions
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21
libsrc/leddevice/LedDeviceAdalightApa102.cpp
View File

@ -12,18 +12,27 @@
#include "LedDeviceAdalightApa102.h"
LedDeviceAdalightApa102::LedDeviceAdalightApa102(const std::string& outputDevice, const unsigned baudrate, int delayAfterConnect_ms) :
LedDeviceAdalight(outputDevice, baudrate, delayAfterConnect_ms),
LedRs232Device(outputDevice, baudrate, delayAfterConnect_ms),
_ledBuffer(0),
_timer()
{
// setup the timer
_timer.setSingleShot(false);
_timer.setInterval(5000);
connect(&_timer, SIGNAL(timeout()), this, SLOT(rewriteLeds()));
// start the timer
_timer.start();
}
// see dependencies folder for arduino sketch for APA102
//comparing to ws2801 adalight, the following changes were needed:
// 1- differnt data frame (4 bytes instead of 3)
// 2 - in order to accomodate point 1 above, number of leds sent to adalight is increased by 1/3rd
int LedDeviceAdalightApa102::write(const std::vector<ColorRgb> & ledValues)
{
ledCount = ledValues.size();
const unsigned int startFrameSize = 4;
const unsigned int endFrameSize = std::max<unsigned int>(((ledValues.size() + 15) / 16), 4);
const unsigned int mLedCount = (ledValues.size() * 4) + startFrameSize + endFrameSize;
const unsigned int endFrameSize = std::max<unsigned int>(((ledCount + 15) / 16), 4);
const unsigned int mLedCount = (ledCount * 4) + startFrameSize + endFrameSize;
if(_ledBuffer.size() != mLedCount+6){
_ledBuffer.resize(mLedCount+6, 0x00);
_ledBuffer[0] = 'A';
@ -34,7 +43,7 @@ int LedDeviceAdalightApa102::write(const std::vector<ColorRgb> & ledValues)
_ledBuffer[5] = _ledBuffer[3] ^ _ledBuffer[4] ^ 0x55; // Checksum
}
for (unsigned iLed=1; iLed<=ledValues.size(); iLed++) {
for (unsigned iLed=1; iLed<=ledCount; iLed++) {
const ColorRgb& rgb = ledValues[iLed-1];
_ledBuffer[iLed*4+6] = 0xFF;
_ledBuffer[iLed*4+1+6] = rgb.red;
@ -57,11 +66,13 @@ int LedDeviceAdalightApa102::switchOff()
_ledBuffer[iLed*4+2+6] = 0x00;
_ledBuffer[iLed*4+3+6] = 0x00;
}
// restart the timer
_timer.start();
// write data
return writeBytes(_ledBuffer.size(), _ledBuffer.data());
}
void LedDeviceAdalightApa102::rewriteLeds()

4
libsrc/leddevice/LedDeviceAdalightApa102.h
View File

@ -7,12 +7,12 @@
#include <QTimer>
// hyperion incluse
#include "LedDeviceAdalight.h"
#include "LedRs232Device.h"
///
/// Implementation of the LedDevice interface for writing to an Adalight led device for APA102.
///
class LedDeviceAdalightApa102 : public LedDeviceAdalight
class LedDeviceAdalightApa102 : public LedRs232Device
{
Q_OBJECT