diff --git a/README b/README
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--- a/README
+++ b/README
@@ -1,4 +1,5 @@
 These are my simple snippets for STM32 (compiled with libopencm3)
+Be carefull: due to API changes these projects will compile only with opencm3 from archive libopencm3.ori.tgz
 
 - 1_wire - pseudo-hardware realisation of 1-wire protocol
 - canon_lens - Canon EF lens management
diff --git a/libopencm3.ori.tgz b/libopencm3.ori.tgz
new file mode 100644
index 0000000..96dadf2
Binary files /dev/null and b/libopencm3.ori.tgz differ