From 546260b09ed7c424362ca8f6d164d4946ba4c6a4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Karel=20Ko=C4=8D=C3=AD?= <cynerd@email.cz>
Date: Sun, 22 Mar 2015 14:30:27 +0100
Subject: Add SPI mcu support check

---
 spi.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/spi.h b/spi.h
index ed6129a..86149f7 100644
--- a/spi.h
+++ b/spi.h
@@ -16,4 +16,8 @@ inline void ioe_spi_expose(int8_t data);
 // Following function must be user defined
 inline void ioe_spi_retrieve(int8_t);
 
+#if !(__MCU_ATmega328p__ || __MCU_ATmega32U4p__)
+#error "SPI is not probably supported by your hardware."
+#endif
+
 #endif /* _IOE_SPI_H_ */
-- 
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