1 files changed, 9 insertions, 2 deletions
diff --git a/avr/main.c b/avr/main.c
index 2f9a62f..af082a3 100644
--- a/avr/main.c
+++ b/avr/main.c
@@ -18,6 +18,7 @@
 #include "cli.h"
 #include "env.h"
 #include "z180-serv.h"
+#include "spi.h"
 
 static uint8_t mcusr;
 
@@ -108,8 +109,15 @@ void setup_avr(void)
 	TCCR3B = (0b01<<WGM32)|(0b001<<CS30); /* CTC Mode, Prescaler 1 */
 	TIMSK3 = _BV(OCIE3A);		/* Enable TC2.oca interrupt */
 
+	/* SPI as master */
+	PRR0 &= ~_BV(PRSPI);
+	SPI_DDR = (SPI_DDR & ~_BV(SPI_MISO))
+			| _BV(SPI_MOSI) | _BV(SPI_SCK) | _BV(SPI_SS);
+	SPI_PORT = (SPI_PORT & ~(_BV(SPI_MOSI) | _BV(SPI_SCK)))
+			| _BV(SPI_SS);
+
 	/* INT5, INT6: falling edge */
-	EICRB = (EICRB & ~((0b11 << ISC50) | (0b11 << ISC60))) | 
+	EICRB = (EICRB & ~((0b11 << ISC50) | (0b11 << ISC60))) |
 		(0b10 << ISC50) | (0b10 << ISC60);
 	/* Reset pending ints */
 	EIFR |= _BV(INTF5) | _BV(INTF6);
@@ -219,7 +227,6 @@ void main_loop(void)
 
 int main(void)
 {
-
 	setup_avr();
 	z80_setup_bus();