Ned Konz / billy_bass

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Dependencies:   mbed

main.cpp@1:2fa375aacece, 2013-05-14 (annotated)

Committer:
bikeNomad
Date:
Tue May 14 14:08:22 2013 +0000
Revision:
1:2fa375aacece
Parent:
0:1ddd40d843cb
Child:
2:5bcd2f55a294
trying to get continuous conversion going

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bikeNomad 0:1ddd40d843cb 1 #include "mbed.h"
bikeNomad 1:2fa375aacece 2 #include "FastAnalogIn.h"
bikeNomad 1:2fa375aacece 3 using namespace NK;
bikeNomad 1:2fa375aacece 4
bikeNomad 1:2fa375aacece 5 // Power:
bikeNomad 1:2fa375aacece 6 // Power GND J9/14
bikeNomad 1:2fa375aacece 7 // Vin (6V) J9/16
bikeNomad 0:1ddd40d843cb 8
bikeNomad 1:2fa375aacece 9 // Digital:
bikeNomad 1:2fa375aacece 10 DigitalOut tail(PTA13); // J3/2
bikeNomad 1:2fa375aacece 11 DigitalOut mouth(PTC12); // J3/1
bikeNomad 1:2fa375aacece 12 DigitalOut head(PTC13); // J3/3
bikeNomad 1:2fa375aacece 13 DigitalIn pushbutton(PTD5); // J3/4
bikeNomad 1:2fa375aacece 14
bikeNomad 1:2fa375aacece 15 PwmOut redLED(LED_RED);
bikeNomad 1:2fa375aacece 16 PwmOut greenLED(LED_GREEN);
bikeNomad 1:2fa375aacece 17 PwmOut blueLED(LED_BLUE);
bikeNomad 0:1ddd40d843cb 18
bikeNomad 1:2fa375aacece 19 // Analog:
bikeNomad 1:2fa375aacece 20 // GND J3/14
bikeNomad 1:2fa375aacece 21 // VrefH J3/16
bikeNomad 1:2fa375aacece 22 FastAnalogIn microphone(PTB0); // J10/2
bikeNomad 1:2fa375aacece 23 AnalogOut speaker(PTE30); // J10/11
bikeNomad 1:2fa375aacece 24
bikeNomad 1:2fa375aacece 25 // Communications:
bikeNomad 1:2fa375aacece 26 // Serial uart1(PTC4, PTC3);
bikeNomad 1:2fa375aacece 27 Serial pc(USBTX, USBRX);
bikeNomad 1:2fa375aacece 28
bikeNomad 1:2fa375aacece 29 const unsigned SAMPLE_RATE_HZ = 7812;
bikeNomad 1:2fa375aacece 30 const unsigned SAMPLE_PERIOD_US = (1000000U / SAMPLE_RATE_HZ);
bikeNomad 1:2fa375aacece 31
bikeNomad 1:2fa375aacece 32 Ticker sampleTicker;
bikeNomad 1:2fa375aacece 33
bikeNomad 1:2fa375aacece 34 uint8_t sampleBuffer[SAMPLE_RATE_HZ]; // 1 second buffer
bikeNomad 1:2fa375aacece 35 uint8_t * volatile nextSample;
bikeNomad 1:2fa375aacece 36 unsigned volatile samplesRemaining;
bikeNomad 1:2fa375aacece 37
bikeNomad 1:2fa375aacece 38 extern "C"
bikeNomad 1:2fa375aacece 39 void ADC0_IRQHandler(void)
bikeNomad 0:1ddd40d843cb 40 {
bikeNomad 1:2fa375aacece 41 pc.printf("irq\r\n");
bikeNomad 1:2fa375aacece 42 if (samplesRemaining) {
bikeNomad 1:2fa375aacece 43 *nextSample++ = microphone.read_u16() >> 8;
bikeNomad 1:2fa375aacece 44 samplesRemaining--;
bikeNomad 1:2fa375aacece 45 } else {
bikeNomad 1:2fa375aacece 46 microphone.disable_interrupt();
bikeNomad 0:1ddd40d843cb 47 }
bikeNomad 0:1ddd40d843cb 48 }
bikeNomad 0:1ddd40d843cb 49
bikeNomad 1:2fa375aacece 50 void playAudioSample()
bikeNomad 1:2fa375aacece 51 {
bikeNomad 1:2fa375aacece 52 if (samplesRemaining) {
bikeNomad 1:2fa375aacece 53 speaker.write_u16(*nextSample++ << 8);
bikeNomad 1:2fa375aacece 54 samplesRemaining--;
bikeNomad 1:2fa375aacece 55 } else {
bikeNomad 1:2fa375aacece 56 sampleTicker.detach();
bikeNomad 1:2fa375aacece 57 }
bikeNomad 1:2fa375aacece 58 }
bikeNomad 1:2fa375aacece 59
bikeNomad 1:2fa375aacece 60 void resetSampleBuffer()
bikeNomad 1:2fa375aacece 61 {
bikeNomad 1:2fa375aacece 62 nextSample = sampleBuffer;
bikeNomad 1:2fa375aacece 63 samplesRemaining = sizeof(sampleBuffer);
bikeNomad 1:2fa375aacece 64 }
bikeNomad 1:2fa375aacece 65
bikeNomad 1:2fa375aacece 66 void recordAudio()
bikeNomad 1:2fa375aacece 67 {
bikeNomad 1:2fa375aacece 68 pc.printf("Recording %d samples... ", sizeof(sampleBuffer));
bikeNomad 1:2fa375aacece 69 blueLED = 0.0;
bikeNomad 1:2fa375aacece 70
bikeNomad 1:2fa375aacece 71 resetSampleBuffer();
bikeNomad 1:2fa375aacece 72 microphone.enable_interrupt();
bikeNomad 1:2fa375aacece 73
bikeNomad 1:2fa375aacece 74 while (samplesRemaining) {
bikeNomad 1:2fa375aacece 75 wait(0.05);
bikeNomad 1:2fa375aacece 76 blueLED.write(1.0 - (1.0 * samplesRemaining / sizeof(sampleBuffer)));
bikeNomad 1:2fa375aacece 77 }
bikeNomad 1:2fa375aacece 78
bikeNomad 1:2fa375aacece 79 pc.printf("Done\r\n");
bikeNomad 1:2fa375aacece 80 }
bikeNomad 1:2fa375aacece 81
bikeNomad 1:2fa375aacece 82 void playAudio()
bikeNomad 1:2fa375aacece 83 {
bikeNomad 1:2fa375aacece 84 pc.printf("Playing %d samples... ", sizeof(sampleBuffer));
bikeNomad 1:2fa375aacece 85 greenLED = 0.0;
bikeNomad 1:2fa375aacece 86 resetSampleBuffer();
bikeNomad 1:2fa375aacece 87 sampleTicker.attach_us(&playAudioSample, SAMPLE_PERIOD_US);
bikeNomad 1:2fa375aacece 88 while (samplesRemaining) {
bikeNomad 1:2fa375aacece 89 wait(0.05);
bikeNomad 1:2fa375aacece 90 greenLED.write(1.0 - (1.0 * samplesRemaining / sizeof(sampleBuffer)));
bikeNomad 1:2fa375aacece 91 }
bikeNomad 1:2fa375aacece 92 pc.printf("Done\r\n");
bikeNomad 1:2fa375aacece 93
bikeNomad 1:2fa375aacece 94 }
bikeNomad 0:1ddd40d843cb 95 int main()
bikeNomad 0:1ddd40d843cb 96 {
bikeNomad 1:2fa375aacece 97 pc.baud(115200);
bikeNomad 1:2fa375aacece 98 pc.printf("Sample buffer = %u samples; rate = %u Hz; period = %u usec\r\n", sizeof(sampleBuffer), SAMPLE_RATE_HZ, SAMPLE_PERIOD_US);
bikeNomad 1:2fa375aacece 99 redLED = 1.0;
bikeNomad 1:2fa375aacece 100 greenLED = 1.0;
bikeNomad 1:2fa375aacece 101 blueLED = 1.0;
bikeNomad 1:2fa375aacece 102
bikeNomad 1:2fa375aacece 103 microphone.enable_interrupt();
bikeNomad 1:2fa375aacece 104 microphone.start_read();
bikeNomad 1:2fa375aacece 105
bikeNomad 1:2fa375aacece 106 recordAudio();
bikeNomad 1:2fa375aacece 107
bikeNomad 1:2fa375aacece 108 playAudio();
bikeNomad 0:1ddd40d843cb 109 }