cortexelf-v1: Add bit flipping array generator

[fw/altos] / src / cortexelf-v1 / ao_flip_bits.5c

diff --git a/src/cortexelf-v1/ao_flip_bits.5c b/src/cortexelf-v1/ao_flip_bits.5c
new file mode 100644 (file)
index 0000000..2690089
--- /dev/null
+++ b/src/cortexelf-v1/ao_flip_bits.5c
@@ -0,0 +1,19 @@
+#!/usr/bin/nickle
+
+int flip_bits(int a)
+{
+       int result = 0;
+       for (int pos = 0; pos < 8; pos++)
+               if ((a & (1 << pos)) != 0)
+                       result |= (1 << (7 - pos));
+       return result;
+}
+
+printf ("static uint8_t ao_flip_bits[256] = {\n");
+
+for (int i = 0; i < 256; i++) {
+       printf (" 0x%02x,", flip_bits(i));
+       if ((i & 0xf) == 0xf)
+               printf("\n");
+}
+printf("};\n");