Stop DMA when GPIF is done

cozycactus · Apr 22, 2018 · e606fce · e606fce
1 parent 6a6a653
commit e606fce
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Showing 3 changed files with 11 additions and 0 deletions.
diff --git a/acquisition.c b/acquisition.c
@@ -100,3 +100,11 @@ void setup_acquisition(void)
   for(i=0; i<NUM_DMA_BUFFERS; i++)
     dma_buffer_descriptor[i] = Fx3DmaAllocateDescriptor();
 }
+
+void poll_acquisition(void)
+{
+  if (Fx3GpifGetStat(NULL) == FX3_GPIF_DONE) {
+    Fx3UartTxString("GPIF done, stopping DMA\n");
+    stop_acquisition();
+  }
+}
diff --git a/acquisition.h b/acquisition.h
@@ -1,2 +1,3 @@
 extern void start_acquisition(uint8_t bits, uint32_t delay, uint16_t clock_divisor_x2);
 extern void setup_acquisition(void);
+extern void poll_acquisition(void);
diff --git a/main.c b/main.c
@@ -182,6 +182,8 @@ int main(void)
   Fx3UsbConnect();
 
   for(;;) {
+    poll_acquisition();
+
     Fx3GpioSetOutputValueSimple(54, 1);
     Fx3UtilDelayUs(500000);
     if (!Fx3GpioGetInputValueSimple(45)) {