MrAntex · December 21, 2022 22:33 · Dec 21, 2022
diff --git a/audio_lab_accelerator.c b/audio_lab_accelerator.c
@@ -0,0 +1,97 @@
+/*
+I don't really know why but this didn't work for me, the program always got stuck in the while loop of the I2SFifoRead function.
+Even with sound coming, with waiting that we have at least 99 values in the FIFO, with using variables instead of
+directly putting the reading of one FIFO in the writing of another
+
+I don't know why it's not working but I'm submitting my code nevertheless, maybe something was wrong with my installation / compilation chain
+
+*/
+
+void I2SFifoWrite (u32 i2sBaseAddr, u32 audioData)
+{
+
+	Xil_Out32(i2sBaseAddr + 0x10, audioData); // write DATA
+    Xil_Out32(i2sBaseAddr + 0x14, 4);    // write the length of the DATA (4 bytes)
+
+	//xil_printf("%x\n", Xil_In32(i2sBaseAddr + 0x00));
+	while ((Xil_In32(i2sBaseAddr + 0x00)&0x08000000)!=0x08000000){;}  // waits for the transmission completes
+	Xil_Out32(i2sBaseAddr + 0x00, 0x08000000);  // ack the transmission complete
+
+
+}
+
+
+u32 I2SFifoRead (u32 i2sBaseAddr)
+{
+	while (Xil_In32(i2sBaseAddr + 0x1C)==0){;} // waits for a sample in the FIFO
+	int data = Xil_In32(i2sBaseAddr + 0x20);   // read the sample from the FIFO
+
+	return data;
+
+}
+
+
+int main()
+{
+
+	init_platform();
+
+	print("Started!\n\r");
+
+	AudioInitialize(SCU_TIMER_ID, AUDIO_IIC_ID, AUDIO_CTRL_BASEADDR);
+
+	initialize_FIFO(AUDIO_FIFO);
+	initialize_FIFO(FIR_FIFO);
+
+
+	int j=0;
+	int time_now=0;
+	int time_func = 0;
+	int t = 0;
+
+
+	while (1){
+
+		if(j%2==0){
+			t = Xil_In32(GLOBAL_TMR_BASEADDR + GTIMER_COUNTER_LOWER_OFFSET) - time_now;
+		}
+
+
+
+		time_now = Xil_In32(GLOBAL_TMR_BASEADDR + GTIMER_COUNTER_LOWER_OFFSET);
+
+
+		// Left sample
+		I2SFifoWrite(FIR_FIFO, I2SFifoRead(AUDIO_FIFO));
+
+		if(j>=99){
+			I2SFifoWrite(AUDIO_FIFO, I2SFifoRead(FIR_FIFO));
+		}
+    /////////////////
+
+
+		// Right sample
+		I2SFifoWrite(FIR_FIFO, I2SFifoRead(AUDIO_FIFO));
+
+		if(j>=99){
+			I2SFifoWrite(AUDIO_FIFO, I2SFifoRead(FIR_FIFO));
+		}
+    /////////////////
+
+
+		time_func = Xil_In32(GLOBAL_TMR_BASEADDR + GTIMER_COUNTER_LOWER_OFFSET) - time_now;
+
+
+
+		if(j%100000 == 0){
+			xil_printf("Filter : %d, Loop : %d\n",time_func, t);
+			j = 0;
+		}
+
+		j++;
+
+	}
+
+	cleanup_platform();
+	return 0;
+}
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