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- /*
- Basic Pin setup:
- ------------ ---u----
- ARDUINO 13|-> SCLK (pin 25) OUT1 |1 28| OUT channel 0
- 12| OUT2 |2 27|-> GND (VPRG)
- 11|-> SIN (pin 26) OUT3 |3 26|-> SIN (pin 11)
- 10|-> BLANK (pin 23) OUT4 |4 25|-> SCLK (pin 13)
- 9|-> XLAT (pin 24) . |5 24|-> XLAT (pin 9)
- 8| . |6 23|-> BLANK (pin 10)
- 7| . |7 22|-> GND
- 6| . |8 21|-> VCC (+5V)
- 5| . |9 20|-> 2K Resistor -> GND
- 4| . |10 19|-> +5V (DCPRG)
- 3|-> GSCLK (pin 18) . |11 18|-> GSCLK (pin 3)
- 2| . |12 17|-> SOUT
- 1| . |13 16|-> XERR
- 0| OUT14|14 15| OUT channel 15
- ------------ --------
-
- - Put the longer leg (anode) of the LEDs in the +5V and the shorter leg
- (cathode) in OUT(0-15).
- - +5V from Arduino -> TLC pin 21 and 19 (VCC and DCPRG)
- - GND from Arduino -> TLC pin 22 and 27 (GND and VPRG)
- - digital 3 -> TLC pin 18 (GSCLK)
- - digital 9 -> TLC pin 24 (XLAT)
- - digital 10 -> TLC pin 23 (BLANK)
- - digital 11 -> TLC pin 26 (SIN)
- - digital 13 -> TLC pin 25 (SCLK)
- - The 2K resistor between TLC pin 20 and GND will let ~20mA through each
- LED. To be precise, it's I = 39.06 / R (in ohms). This doesn't depend
- on the LED driving voltage.
- - (Optional): put a pull-up resistor (~10k) between +5V and BLANK so that
- all the LEDs will turn off when the Arduino is reset.
-
- If you are daisy-chaining more than one TLC, connect the SOUT of the first
- TLC to the SIN of the next. All the other pins should just be connected
- together:
- BLANK on Arduino -> BLANK of TLC1 -> BLANK of TLC2 -> ...
- XLAT on Arduino -> XLAT of TLC1 -> XLAT of TLC2 -> ...
- The one exception is that each TLC needs it's own resistor between pin 20
- and GND.
-
- This library uses the PWM output ability of digital pins 3, 9, 10, and 11.
- Do not use analogWrite(...) on these pins.
-
- This sketch does the Knight Rider strobe across a line of LEDs.
-
- Alex Leone <acleone ~AT~ gmail.com>, 2009-02-03 */
-
- #include "Tlc5940.h"
-
- void setup()
- {
- /* Call Tlc.init() to setup the tlc.
- You can optionally pass an initial PWM value (0 - 4095) for all channels.*/
- Tlc.init();
- }
-
- /* This loop will create a Knight Rider-like effect if you have LEDs plugged
- into all the TLC outputs. NUM_TLCS is defined in "tlc_config.h" in the
- library folder. After editing tlc_config.h for your setup, delete the
- Tlc5940.o file to save the changes. */
-
- void loop()
- {
- int direction = 1;
- for (int channel = 0; channel < NUM_TLCS * 16; channel += direction) {
-
- /* Tlc.clear() sets all the grayscale values to zero, but does not send
- them to the TLCs. To actually send the data, call Tlc.update() */
- Tlc.clear();
-
- /* Tlc.set(channel (0-15), value (0-4095)) sets the grayscale value for
- one channel (15 is OUT15 on the first TLC, if multiple TLCs are daisy-
- chained, then channel = 16 would be OUT0 of the second TLC, etc.).
-
- value goes from off (0) to always on (4095).
-
- Like Tlc.clear(), this function only sets up the data, Tlc.update()
- will send the data. */
- if (channel == 0) {
- direction = 1;
- } else {
- Tlc.set(channel - 1, 1000);
- }
- Tlc.set(channel, 4095);
- if (channel != NUM_TLCS * 16 - 1) {
- Tlc.set(channel + 1, 1000);
- } else {
- direction = -1;
- }
-
- /* Tlc.update() sends the data to the TLCs. This is when the LEDs will
- actually change. */
- Tlc.update();
-
- delay(75);
- }
-
- }
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