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49 lines
1.2 KiB
49 lines
1.2 KiB
4 years ago
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/* Any copyright is dedicated to the Public Domain. */
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#include "sigma_delta.h"
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void setup() {
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Serial.begin(115200);
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pinMode(LED_BUILTIN, OUTPUT); // blinkie & sigma-delta mix
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uint32_t reqFreq = 1000;
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uint32_t realFreq;
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realFreq = sigmaDeltaSetup(0, reqFreq); // chose a low frequency
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Serial.println();
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Serial.println("Start Sigma Delta Example\n");
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Serial.printf("Frequency = %u\n", realFreq);
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}
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void loop() {
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uint8_t duty, iRepeat;
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Serial.println("Attaching the built in led to the sigma delta source now\n");
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Serial.printf("Current duty = %i, prescaler = %i\n", sigmaDeltaRead(), sigmaDeltaGetPrescaler());
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sigmaDeltaAttachPin(LED_BUILTIN);
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Serial.println("Dimming builtin led...\n");
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for (iRepeat = 0; iRepeat < 10; iRepeat++) {
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for (duty = 0; duty < 255; duty = duty + 5) {
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sigmaDeltaWrite(0, duty);
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delay(10);
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}
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for (duty = 255; duty > 0; duty = duty - 5) {
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sigmaDeltaWrite(0, duty);
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delay(10);
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}
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}
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Serial.println("Detaching builtin led & playing a blinkie\n");
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sigmaDeltaDetachPin(LED_BUILTIN);
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for (iRepeat = 0; iRepeat < 20; iRepeat++) {
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digitalWrite(LED_BUILTIN, !digitalRead(LED_BUILTIN));
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delay(500);
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}
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}
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