commit

2020-07-09 11:06:56 +08:00
parent f4130016bd
commit 5cb9be51f2
1 changed files with 8 additions and 1 deletions
@@ -822,11 +822,18 @@ static void BitReverse(int BR_array[],int NUM_FFT) {
    unsigned int swapA, swapB, sw_cnt;
    #endif

+
+    unsigned char BR_table = [0,4,2,6,1,3,5,7];
    int  TemStore;

    for (sw_cnt=1; sw_cnt<NUM_FFT/2; sw_cnt++){
        swapA = sw_cnt;
-        swapB =
+        swapB = BR_table[sw_cnt] *2;
+        if (swapB > swapA){
+            TemStore = BR_array[swapA];
+            BR_array[swapA] = BR_array[swapB];
+            BR_array[swapB] = TemStore;
+        }
    }