1 files changed, 29 insertions, 0 deletions
diff --git a/tools/lookuptablemaker.c b/tools/lookuptablemaker.c
new file mode 100644
index 0000000..f16420a
--- /dev/null
+++ b/tools/lookuptablemaker.c
@@ -0,0 +1,29 @@
+// Example sine lut generator
+#include <stdio.h>
+#include <math.h>
+
+#define M_PI 3.1415926535f
+#define SIN_SIZE 512
+#define SIN_FP 12
+
+int main()
+{
+    int ii;
+    FILE *fp= fopen("sinlut.c", "w");
+    unsigned short hw;
+
+    fprintf(fp, "//\n// Sine lut; %d entries, %d fixeds\n//\n\n", 
+        SIN_SIZE, SIN_FP);
+    fprintf(fp, "const short sin_lut[%d]=\n{", SIN_SIZE);
+    for(ii=0; ii<SIN_SIZE; ii++)
+    {
+        hw= (unsigned short)(sin(ii*2*M_PI/SIN_SIZE)*(1<<SIN_FP));
+        if(ii%8 == 0)
+            fputs("\n\t", fp);
+        fprintf(fp, "0x%04X, ", hw);
+    }
+    fputs("\n};\n", fp);
+
+    fclose(fp);
+    return 0;
+}