register SPI interrupt when playing WAV & RAW files

play_sd_raw.cpp

  */
 
 #include "play_sd_raw.h"
+#include "spi_interrupt.h"
 
 
 void AudioPlaySdRaw::begin(void)
 bool AudioPlaySdRaw::play(const char *filename)
 {
 	stop();
+	AudioStartUsingSPI();
 	__disable_irq();
 	rawfile = SD.open(filename);
 	__enable_irq();
 		playing = false;
 		__enable_irq();
 		rawfile.close();
+		AudioStopUsingSPI();
 	} else {
 		__enable_irq();
 	}
 		transmit(block);
 	} else {
 		rawfile.close();
+		AudioStopUsingSPI();
 		playing = false;
 	}
 	release(block);

play_sd_wav.cpp

  */
 
 #include "play_sd_wav.h"
+#include "spi_interrupt.h"
 
 #define STATE_DIRECT_8BIT_MONO		0  // playing mono at native sample rate
 #define STATE_DIRECT_8BIT_STEREO	1  // playing stereo at native sample rate
 bool AudioPlaySdWav::play(const char *filename)
 {
 	stop();
+	AudioStartUsingSPI();
 	__disable_irq();
 	wavfile = SD.open(filename);
 	__enable_irq();
 		if (b1) release(b1);
 		if (b2) release(b2);
 		wavfile.close();
+		AudioStopUsingSPI();
 	} else {
 		__enable_irq();
 	}
 	}
 end:	// end of file reached or other reason to stop
 	wavfile.close();
+	AudioStopUsingSPI();
 	state_play = STATE_STOP;
 	state = STATE_STOP;
 cleanup:

spi_interrupt.h

 }
 
 static inline void AudioStopUsingSPI(void) {
-	if (--AudioUsingSPICount == 0)
+	if (AudioUsingSPICount == 0 || --AudioUsingSPICount == 0)
 		SPI.notUsingInterrupt(IRQ_SOFTWARE);
 }