Diff: main.cpp

Revision:

1:c3f10403b3db

Parent:

0:dcb5b9e65fe4

Child:

4:0b5c342628ff

diff -r dcb5b9e65fe4 -r c3f10403b3db main.cpp
--- a/main.cpp	Fri Mar 03 07:30:41 2017 +0000
+++ b/main.cpp	Fri Mar 03 16:26:26 2017 +0800
@@ -1,10 +1,108 @@
-#include "mbed.h"
-
-// main() runs in its own thread in the OS
-// (note the calls to wait below for delays)
-int main() {
-    // TO BE EXTENDED
-    
-    return 0;
-}
-
+#include "mbed.h"
+
+#include "NAU8822L.h"
+
+#if defined(TARGET_NUMAKER_PFM_NUC472)
+#include "NuSDFileSystem.h"
+
+NAU8822L audio(PC_9, PA_15, 0x1A, PG_7, PG_8, PG_9, PI_11, PI_12); // NAU8822L object
+DigitalOut hp_enable(PH_2);
+NuSDFileSystem Nu_SD(PF_6, PF_7, PF_8, PF_5 ,PF_4, PF_3, PF_2, "sd");
+#elif defined(TARGET_NUMAKER_PFM_M453)
+NAU8822L audio(PD_4, PD_5, 0x1A, PA_5, PA_6, PA_7, PD_0, PA_4); // NAU8822L object
+DigitalOut hp_enable(PE_1);
+#endif
+Serial output(USBTX, USBRX);
+InterruptIn button(SW2);    // button SW2
+DigitalOut led(LED1);       // flashing LED1(rgbled1)
+
+int readPtr = 0;
+
+#if defined(TARGET_NUMAKER_PFM_NUC472)
+FILE *fp;
+
+int audioBuf[4096];
+
+int writePtr = 0;
+int theta = 0;
+#elif defined(TARGET_NUMAKER_PFM_M453)
+// 1k sine wave@sampling rate 16kHz stereo 16-bit
+const char sine1k[] = {
+    0x00, 0x00, 0x00, 0x00, 0x1F, 0x06, 0x1F, 0x06, 0x50, 0x0B, 0x50, 0x0B, 0xC7, 0x0E, 0xC7, 0x0E,
+    0xFF, 0x0F, 0xFF, 0x0F, 0xC7, 0x0E, 0xC7, 0x0E, 0x50, 0x0B, 0x50, 0x0B, 0x1F, 0x06, 0x1F, 0x06,
+    0x00, 0x00, 0x00, 0x00, 0xE1, 0xF9, 0xE1, 0xF9, 0xB0, 0xF4, 0xB0, 0xF4, 0x39, 0xF1, 0x39, 0xF1,
+    0x01, 0xF0, 0x01, 0xF0, 0x39, 0xF1, 0x39, 0xF1, 0xB0, 0xF4, 0xB0, 0xF4, 0xE1, 0xF9, 0xE1, 0xF9
+};
+#endif
+
+void flip(void) {
+    led = !led;
+}
+
+void playback(void) {
+#if defined(TARGET_NUMAKER_PFM_NUC472)
+    audio.write(audioBuf, readPtr, 4);
+    readPtr += 4;
+    readPtr &= 0xFFF;
+    theta -= 4;
+#elif defined(TARGET_NUMAKER_PFM_M453)
+    audio.write((int *)sine1k, readPtr, 2);
+    readPtr += 2;
+    readPtr &= 0xF;
+#endif
+}
+
+void fillAudioBuf(void) {
+#if defined(TARGET_NUMAKER_PFM_NUC472)
+    while (!feof(fp)) {
+        if (theta < 4096) {
+            // read 2 integers
+            fread(&audioBuf[writePtr], 4, 2, fp);
+            NVIC_DisableIRQ(I2S1_IRQn); // FIXME
+            theta += 2;
+            NVIC_EnableIRQ(I2S1_IRQn);  // FIXME
+            writePtr += 2;
+            writePtr &= 0xFFF;
+        }
+    }
+#elif defined(TARGET_NUMAKER_PFM_M453)
+    while (1);
+#endif
+}
+
+int main(void) {
+    led = 1;
+    
+    // sets the console baud-rate
+    output.baud(115200);
+    
+    // disable headphone
+    hp_enable = 1;
+    
+    button.rise(&flip);
+#if defined(TARGET_NUMAKER_PFM_NUC472)
+    fp = fopen("/sd/test.pcm", "r");
+    if (fp == NULL) {
+        output.printf("Error opening file!\n");
+        return -1;
+    }
+    
+    for (int i = 0; i < 4096; i++) {
+        audioBuf[i] = 0;
+    }
+#endif
+    audio.attach(&playback);
+    
+    output.printf("Start playing...\n");
+    audio.start();
+    
+    // enable headphone
+	hp_enable = 0;
+    
+    fillAudioBuf();
+    
+    output.printf("Stop playing.\n");
+    audio.stop();
+    
+    led = 0;
+}