fixed things. does not successfully receive!

1 files changed, 46 insertions, 11 deletions

diff --git a/main.c b/main.c
index f812e4e..8cf43a1 100644
--- a/main.c
+++ b/main.c
@@ -16,7 +16,10 @@ int recv_gc()
 	char* buf_ptr = buffer;
 
 	asm volatile(
+		"clr r16 \n"
 		"recv_wait_low_initial_loop: \n"
+		"inc r16 \n"
+		"breq timeout \n"
 		"sbic %1, 5 \n"
 		"rjmp recv_wait_low_initial_loop \n" // from low to the start of counting: 6 cycles = 0.5us
 		"nop \n"
@@ -106,11 +109,22 @@ void send_gc(char* bytes, int len)
 		"; now send the stop bit and release the line \n"
 		"nop \n nop \n nop \n"
 		OUT0
-		WAIT10
-		OUT1
-		"; done :) \n"
+		"; instead of WAIT10, do some sensible cleanup work \n"
+		"clr r16  ; needed below \n"
 		"pop r30 \n"
 		"pop r31 \n"
+		"nop \n nop \n nop \n nop \n nop \n"
+		OUT1
+		"; done :) \n\n\n"
+
+
+		"; now the final thing is to wait for DATA become high again (should be immediately anyway) \n"
+		"send_final_loop: \n"
+		"inc r16 \n"
+		"breq send_timeout \n"
+		"sbis %0, 5 \n"
+		"rjmp send_final_loop \n"
+		"send_timeout: \n"
 		
 		: 
 		:	"I" (_SFR_IO_ADDR(DDRC)), 
@@ -129,24 +143,45 @@ int main (void)
 	PORTC=0x00;
 
 	DDRB=0xFF;
+	DDRD=0x00;
 	PORTB=0x55;
 
 
-	PORTB=0x55;
-
 	int temp=0;
+	int n_received;
+
+	while(1)
+	{
+		temp++;
+		if (!(PIND & 0x08))
+		{
+			//PORTB=~(1 << ((temp>>9)%6));
+			PORTB=~temp;
+		}
+		else if (!(PIND & 0x10))
+		{
+			//PORTB=~buffer[4];
+			char tmp=0;
+			for (int i=0;i<8;i++)
+				tmp|= ( (buffer[i]&0x80)?(1<<i):0 );
+			PORTB=~tmp;
+		}
+		else if (!(PIND & 0x20))
+		{
+			PORTB=~n_received>>3;
+		}
+		else if (!(PIND & 0x40))
+		{
+			PORTB=~0x00;
+		}
 
-
-       while(1)
-       {
-               temp++;
-//               PORTB=~(1 << ((temp>>9)%6));
-PORTB=~temp;
                _delay_ms(1);
 
 	char foo[] = { 0x40, 0x03, 0x02 };
 
 	send_gc(foo, 3);
+	n_received=recv_gc();
+
 
 	}