Leddevices source tree refactoring (#461)

* rework structure of leddevice source tree * fix data type vor v4l sig detection value in webui * automate leddevicefactory.cpp
2025-03-01 10:33:28 +00:00 · 2017-08-07 10:05:46 +02:00
parent f3bbe158bf
commit 317a903b14
76 changed files with 98 additions and 222 deletions
--- a/libsrc/leddevice/dev_spi/LedDeviceSk6822SPI.cpp
+++ b/libsrc/leddevice/dev_spi/LedDeviceSk6822SPI.cpp
@@ -0,0 +1,118 @@
+#include "LedDeviceSk6822SPI.h"
+/*
+From the data sheet:
+
+(TH+TL=1.7μs±600ns)
+
+T0H,	 0 code, high level time,	 0.35µs ±0.150ns
+T0L,	 0 code, low level time,	 1.36µs ±0.150ns
+T1H,	 1 code, high level time,	 1.36µs ±0.150ns
+T1L,	 1 code, low level time,	 0.35µs ±0.150ns
+WT,	 Wait for the processing time,	 12µs ±0.150ns
+Trst,	 Reset code,low level time,	 50µs
+
+To normalise the pulse times so they fit in 4 SPI bits:
+
+Use timings at upper end of tolerance:
+1.36 -> 1.50 uS
+0.35 -> 0.50 uS
+
+A SPI bit time of 0.50uS = 2Mbit/sec
+T0 is sent as 1000
+T1 is sent as 1110
+
+With a bit of excel testing, we can work out the maximum and minimum speeds:
+2000000 MIN
+2230000 AVG
+2460000 MAX
+
+Wait time:
+using the min of  2000000, the bit time is 0.500
+Wait time is 12uS = 24 bits = 3 bytes
+
+Reset time:
+using the min of  2000000, the bit time is 0.500
+Reset time is 50uS = 100 bits = 13 bytes
+
+*/
+
+
+LedDeviceSk6822SPI::LedDeviceSk6822SPI(const QJsonObject &deviceConfig)
+	: ProviderSpi()
+	, SPI_BYTES_PER_COLOUR(4)
+	, SPI_BYTES_WAIT_TIME(3)
+	, SPI_FRAME_END_LATCH_BYTES(13)
+	, bitpair_to_byte {
+		0b10001000,
+		0b10001110,
+		0b11101000,
+		0b11101110,
+	}
+{
+	_deviceReady = init(deviceConfig);
+}
+
+LedDevice* LedDeviceSk6822SPI::construct(const QJsonObject &deviceConfig)
+{
+	return new LedDeviceSk6822SPI(deviceConfig);
+}
+
+bool LedDeviceSk6822SPI::init(const QJsonObject &deviceConfig)
+{
+	_baudRate_Hz = 2230000;
+	if ( !ProviderSpi::init(deviceConfig) )
+	{
+		return false;
+	}
+	WarningIf(( _baudRate_Hz < 2000000 || _baudRate_Hz > 2460000 ), _log, "SPI rate %d outside recommended range (2000000 -> 2460000)", _baudRate_Hz);
+
+	_ledBuffer.resize( (_ledRGBCount *  SPI_BYTES_PER_COLOUR) + (_ledCount * SPI_BYTES_WAIT_TIME ) + SPI_FRAME_END_LATCH_BYTES, 0x00);
+//	Debug(_log, "_ledBuffer.resize(_ledRGBCount:%d * SPI_BYTES_PER_COLOUR:%d) + ( _ledCount:%d * SPI_BYTES_WAIT_TIME:%d ) + SPI_FRAME_END_LATCH_BYTES:%d, 0x00)", _ledRGBCount, SPI_BYTES_PER_COLOUR, _ledCount, SPI_BYTES_WAIT_TIME,  SPI_FRAME_END_LATCH_BYTES);
+
+	return true;
+}
+
+int LedDeviceSk6822SPI::write(const std::vector<ColorRgb> &ledValues)
+{
+	unsigned spi_ptr = 0;
+	const int SPI_BYTES_PER_LED = sizeof(ColorRgb) * SPI_BYTES_PER_COLOUR;
+
+	for (const ColorRgb& color : ledValues)
+	{
+		uint32_t colorBits = ((unsigned int)color.red << 16)
+			| ((unsigned int)color.green << 8)
+			| color.blue;
+
+		for (int j=SPI_BYTES_PER_LED - 1; j>=0; j--)
+		{
+			_ledBuffer[spi_ptr+j] = bitpair_to_byte[ colorBits & 0x3 ];
+			colorBits >>= 2;
+		}
+		spi_ptr += SPI_BYTES_PER_LED;
+		spi_ptr += SPI_BYTES_WAIT_TIME;	// the wait between led time is all zeros
+	}
+
+
+/*
+// debug the whole SPI packet
+	char debug_line[2048];
+	int ptr=0;
+	for (unsigned int i=0; i < _ledBuffer.size(); i++)
+	{
+		if (i%16 == 0)
+		{
+			ptr += snprintf (ptr+debug_line, sizeof(debug_line)-ptr, "%03x: ", i);
+		}
+
+		ptr += snprintf (ptr+debug_line, sizeof(debug_line)-ptr, "%02x ", _ledBuffer.data()[i]);
+
+		if ( (i%16 == 15) || ( i == _ledBuffer.size()-1 ) )
+		{
+			Debug(_log, debug_line);
+			ptr = 0;
+		}
+	}
+*/
+
+	return writeBytes(_ledBuffer.size(), _ledBuffer.data());
+}