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Code Issues Releases Wiki Activity

1. changed default number of pwm LEDs to 256

Browse Source 
2. Adds support for level shifters that invert the data
Config option - "invert" (integer)
if omitted, do not invert
if == 0, do not invert
if !=0, invert


Former-commit-id: fd5b2863a85b11ac3a8444d1e02822f852feb556
This commit is contained in:
penfold42 2016-03-22 23:50:14 +11:00
parent 9cbc005ee0
commit 6143075365
3 changed files with 10 additions and 6 deletions
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5
libsrc/leddevice/LedDeviceFactory.cpp
View File

@ -324,12 +324,13 @@ LedDevice * LedDeviceFactory::construct(const Json::Value & deviceConfig)
else if (type == "ws281x") else if (type == "ws281x")
{ {
const int gpio = deviceConfig.get("gpio", 18).asInt(); const int gpio = deviceConfig.get("gpio", 18).asInt();
const int leds = deviceConfig.get("leds", 12).asInt(); const int leds = deviceConfig.get("leds", 256).asInt();
const uint32_t freq = deviceConfig.get("freq", (Json::UInt)800000ul).asInt(); const uint32_t freq = deviceConfig.get("freq", (Json::UInt)800000ul).asInt();
const int dmanum = deviceConfig.get("dmanum", 5).asInt(); const int dmanum = deviceConfig.get("dmanum", 5).asInt();
const int pwmchannel = deviceConfig.get("pwmchannel", 0).asInt(); const int pwmchannel = deviceConfig.get("pwmchannel", 0).asInt();
const int invert = deviceConfig.get("invert", 0).asInt();
LedDeviceWS281x * ledDeviceWS281x = new LedDeviceWS281x(gpio, leds, freq, dmanum, pwmchannel); LedDeviceWS281x * ledDeviceWS281x = new LedDeviceWS281x(gpio, leds, freq, dmanum, pwmchannel, invert);
device = ledDeviceWS281x; device = ledDeviceWS281x;
} }
#endif #endif

6
libsrc/leddevice/LedDeviceWS281x.cpp
View File

@ -3,7 +3,7 @@
#include "LedDeviceWS281x.h" #include "LedDeviceWS281x.h"
// Constructor // Constructor
LedDeviceWS281x::LedDeviceWS281x(const int gpio, const int leds, const uint32_t freq, const int dmanum, const int pwmchannel) LedDeviceWS281x::LedDeviceWS281x(const int gpio, const int leds, const uint32_t freq, const int dmanum, const int pwmchannel, const int invert)
{ {
initialized = false; initialized = false;
led_string.freq = freq; led_string.freq = freq;
@ -14,13 +14,13 @@ LedDeviceWS281x::LedDeviceWS281x(const int gpio, const int leds, const uint32_t
} }
chan = pwmchannel; chan = pwmchannel;
led_string.channel[chan].gpionum = gpio; led_string.channel[chan].gpionum = gpio;
led_string.channel[chan].invert = 0; led_string.channel[chan].invert = invert;
led_string.channel[chan].count = leds; led_string.channel[chan].count = leds;
led_string.channel[chan].brightness = 255; led_string.channel[chan].brightness = 255;
led_string.channel[chan].strip_type = WS2811_STRIP_RGB; led_string.channel[chan].strip_type = WS2811_STRIP_RGB;
led_string.channel[!chan].gpionum = 0; led_string.channel[!chan].gpionum = 0;
led_string.channel[!chan].invert = 0; led_string.channel[!chan].invert = invert;
led_string.channel[!chan].count = 0; led_string.channel[!chan].count = 0;
led_string.channel[!chan].brightness = 0; led_string.channel[!chan].brightness = 0;
led_string.channel[!chan].strip_type = WS2811_STRIP_RGB; led_string.channel[!chan].strip_type = WS2811_STRIP_RGB;

5
libsrc/leddevice/LedDeviceWS281x.h
View File

@ -16,8 +16,11 @@ public:
/// @param leds The number of leds attached to the gpio pin /// @param leds The number of leds attached to the gpio pin
/// @param freq The target frequency for the data line, default is 800000 /// @param freq The target frequency for the data line, default is 800000
/// @param dmanum The DMA channel to use, default is 5 /// @param dmanum The DMA channel to use, default is 5
/// @param pwmchannel The pwm channel to use
/// @param invert Invert the output line to support an inverting level shifter
/// ///
LedDeviceWS281x(const int gpio, const int leds, const uint32_t freq, int dmanum, int pwmchannel); LedDeviceWS281x(const int gpio, const int leds, const uint32_t freq, int dmanum, int pwmchannel, int invert);
/// ///
/// Destructor of the LedDevice, waits for DMA to complete and then cleans up /// Destructor of the LedDevice, waits for DMA to complete and then cleans up