mirror of
https://github.com/PaulStoffregen/Tlc5940
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46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
/*
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A simple 1-d oscilliscope: scan all the channels, setting the PWM output
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value to 4x the analog pin 0 value (0 - 1024 * 4 = 4096). The value will
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fade to zero as the channels keep scanning.
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See the BasicUse example for hardware setup.
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Alex Leone <acleone ~AT~ gmail.com>, 2009-02-03 */
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#include "Tlc5940.h"
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#include "tlc_fades.h"
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// which analog pin to use
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#define ANALOG_PIN 0
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// how many millis to strobe over all the LEDs
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#define SCOPE_PERIOD (1000 * NUM_TLCS)
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#define LED_PERIOD SCOPE_PERIOD / (NUM_TLCS * 16)
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TLC_CHANNEL_TYPE channel;
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void setup()
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{
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Tlc.init();
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}
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void loop()
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{
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uint32_t lastMillis = millis();
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tlc_addFade(channel, // led channel
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analogRead(ANALOG_PIN) * 4, // start fade value (0-4095)
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0, // end fade value (0-4095)
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lastMillis + 2, // start millis
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lastMillis + (uint16_t)SCOPE_PERIOD / 4 // end millis
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);
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if (channel++ == NUM_TLCS * 16) {
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channel = 0;
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}
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uint32_t currentMillis;
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do {
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currentMillis = millis();
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tlc_updateFades(currentMillis);
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} while (currentMillis - lastMillis <= LED_PERIOD);
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}
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