Commit 2cd3540

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Merge pull request #149 from pennam/serial_plotter

PDMSerialPlotter stereo version

2 parents f1b6c05 + 3cb4787 commit 2cd3540Copy full SHA for 2cd3540

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Lines changed: 14 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -12,8 +12,14 @@`
`12`	`12`
`13`	`13`	`#include <PDM.h>`
`14`	`14`
	`15`	`+// default number of output channels`
	`16`	`+static const char channels = 1;`
	`17`	`+`
	`18`	`+// default PCM output frequency`
	`19`	`+static const int frequency = 16000;`
	`20`	`+`
`15`	`21`	`// Buffer to read samples into, each sample is 16-bits`
`16`		`-short sampleBuffer[256];`
	`22`	`+short sampleBuffer[512];`
`17`	`23`
`18`	`24`	`// Number of audio samples read`
`19`	`25`	`volatile int samplesRead;`
`@@ -33,7 +39,7 @@ void setup() {`
`33`	`39`	`// - one channel (mono mode)`
`34`	`40`	`// - a 16 kHz sample rate for the Arduino Nano 33 BLE Sense`
`35`	`41`	`// - a 32 kHz or 64 kHz sample rate for the Arduino Portenta Vision Shield`
`36`		`- if (!PDM.begin(1, 16000)) {`
	`42`	`+ if (!PDM.begin(channels, frequency)) {`
`37`	`43`	`Serial.println("Failed to start PDM!");`
`38`	`44`	`while (1);`
`39`	`45`	`}`
`@@ -45,6 +51,12 @@ void loop() {`
`45`	`51`
`46`	`52`	`// Print samples to the serial monitor or plotter`
`47`	`53`	`for (int i = 0; i < samplesRead; i++) {`
	`54`	`+ if(channels == 2) {`
	`55`	`+ Serial.print("L:");`
	`56`	`+ Serial.print(sampleBuffer[i]);`
	`57`	`+ Serial.print(" R:");`
	`58`	`+ i++;`
	`59`	`+ }`
`48`	`60`	`Serial.println(sampleBuffer[i]);`
`49`	`61`	`}`
`50`	`62`

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