hyperion.ng/libsrc/leddevice/LedDeviceWs2812SPI.cpp
penfold42 c179b86b8d fix LedDeviceWs2812SPI to compile on gcc 4.6 (#643)
* Removed -HUP so the default -TERM signal is sent instead.
- hyperiond only listens for TERM and INT. HUP is often used to get an exe to reread its config

Changed pgrep to add '-x' so it wont partial match on the exe name.
- I have multiple instances with multiple hyperiond-instance1 names
- this ensures the service script only kills the right process

* reversing errant change to hyperion.systemd.sh

* cleaned up a couple of compiler warnings

* moved bitpair_to_byte initialiser to (hopefully) work with older GCC

* compiler warning in udp driver
removed some tabs in ws2812b.cpp

* formatting - spaces to tabs


Former-commit-id: 42cc7325177c9fcc3d1bd29cbfe72f02118d3233
2016-05-22 12:56:44 +02:00

65 lines
1.5 KiB
C++

// STL includes
#include <cstring>
#include <cstdio>
#include <iostream>
// Linux includes
#include <fcntl.h>
#include <sys/ioctl.h>
// hyperion local includes
#include "LedDeviceWs2812SPI.h"
LedDeviceWs2812SPI::LedDeviceWs2812SPI(const std::string& outputDevice, const unsigned baudrate) :
LedSpiDevice(outputDevice, baudrate, 0),
mLedCount(0),
bitpair_to_byte {
0b10001000,
0b10001100,
0b11001000,
0b11001100,
}
{
// empty
}
int LedDeviceWs2812SPI::write(const std::vector<ColorRgb> &ledValues)
{
mLedCount = ledValues.size();
// 3 colours, 4 spi bytes per colour + 3 frame end latch bytes
#define COLOURS_PER_LED 3
#define SPI_BYTES_PER_COLOUR 4
#define SPI_BYTES_PER_LED COLOURS_PER_LED * SPI_BYTES_PER_COLOUR
unsigned spi_size = mLedCount * SPI_BYTES_PER_LED + 3;
if(_spiBuffer.size() != spi_size){
_spiBuffer.resize(spi_size, 0x00);
}
unsigned spi_ptr = 0;
for (unsigned i=0; i< mLedCount; ++i) {
uint32_t colorBits = ((unsigned int)ledValues[i].red << 16)
| ((unsigned int)ledValues[i].green << 8)
| ledValues[i].blue;
for (int j=SPI_BYTES_PER_LED - 1; j>=0; j--) {
_spiBuffer[spi_ptr+j] = bitpair_to_byte[ colorBits & 0x3 ];
colorBits >>= 2;
}
spi_ptr += SPI_BYTES_PER_LED;
}
_spiBuffer[spi_ptr++] = 0;
_spiBuffer[spi_ptr++] = 0;
_spiBuffer[spi_ptr++] = 0;
return writeBytes(spi_size, _spiBuffer.data());
}
int LedDeviceWs2812SPI::switchOff()
{
return write(std::vector<ColorRgb>(mLedCount, ColorRgb{0,0,0}));
}