1 files changed, 4 insertions, 5 deletions
diff --git a/src/spi.c b/src/spi.c
index adf858d..d7af297 100644
--- a/src/spi.c
+++ b/src/spi.c
@@ -3,15 +3,14 @@
 #ifdef CONFIG_SPI
 
 volatile int8_t _spi_busy;
-volatile Mutex spi_mutex;
 
 void (*spi_receive) (uint8_t data) = 0;
 
 ISR(SPI_STC_vect, ISR_BLOCK) {
-    _spi_busy = 0;
-    if (spi_receive != NULL) {
-        spir_w(SPDR);
-    }
+	_spi_busy = 0;
+	if (spi_receive != 0) {
+		spi_receive(SPDR);
+	}
 }
 
 #endif /* CONFIG_SPI */