From 70404f704dc8acbfa4bae971661dd484a997085a Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Mon, 28 Oct 2013 21:59:48 +0200
Subject: [PATCH] Rewrite arducontrol interface module to use the new serial
 API

---
 arducontrol/Makefile    |  1 +
 arducontrol/interface.c | 69 +++++++----------------------------------
 2 files changed, 12 insertions(+), 58 deletions(-)

diff --git a/arducontrol/Makefile b/arducontrol/Makefile
index a7cb562..be2ca32 100644
--- a/arducontrol/Makefile
+++ b/arducontrol/Makefile
@@ -1,3 +1,4 @@
+FEATURES := SERIAL_ASYNC
 include ../common/build.mk
 
 arducontrol.elf: adc.o interface.o monitor.o motorola.o output.o serial.o s88.o timer.o
diff --git a/arducontrol/interface.c b/arducontrol/interface.c
index 4064120..675770f 100644
--- a/arducontrol/interface.c
+++ b/arducontrol/interface.c
@@ -1,3 +1,4 @@
+#include <avr/io.h>
 #include "interface.h"
 #include "monitor.h"
 #include "motorola.h"
@@ -5,13 +6,6 @@
 #include "serial.h"
 #include "s88.h"
 
-volatile uint8_t recv_buf[32];
-uint8_t recv_head = 0;
-uint8_t recv_tail = 0;
-volatile uint8_t recv_fill = 0;
-volatile uint8_t recv_overrun = 0;
-
-void process_commands(void);
 uint8_t dispatch_command(const uint8_t *, uint8_t);
 
 void interface_init(void)
@@ -23,48 +17,23 @@ void interface_init(void)
 
 void interface_check(void)
 {
-	if(recv_overrun)
-	{
+	if(serial_read_overrun())
 		interface_send1(RECEIVE_OVERRUN);
-		recv_overrun = 0;
-	}
-	if(recv_fill>0)
-		process_commands();
-}
 
-void process_commands(void)
-{
-	while(recv_fill>0)
+	while(serial_read_available())
 	{
-		uint8_t cmd[15];
-		uint8_t length = ~recv_buf[recv_tail];
+		uint8_t length = ~serial_read();
 
-		if(length<0x10)
-		{
-			if(recv_fill<=length)
-				break;
-
-			uint8_t i, j;
-			for(i=0, j=recv_tail+1; i<length; ++i, ++j)
-			{
-				if(j>=sizeof(recv_buf))
-					j = 0;
-				cmd[i] = recv_buf[j];
-			}
-		}
-		else
-		{
-			length = 0;
+		if(length>=0x10)
 			interface_send1(FRAMING_ERROR);
-		}
+		else if(length>0)
+		{
+			uint8_t cmd[15];
+			uint8_t i;
 
-		recv_tail += length+1;
-		if(recv_tail>=sizeof(recv_buf))
-			recv_tail -= sizeof(recv_buf);
-		recv_fill -= length+1;
+			for(i=0; i<length; ++i)
+				cmd[i] = serial_read();
 
-		if(length>0)
-		{
 			uint8_t result = dispatch_command(cmd, length);
 			interface_send1(result);
 		}
@@ -104,19 +73,3 @@ void interface_send1(uint8_t cmd)
 	serial_write(0xFE);
 	serial_write(cmd);
 }
-
-static inline void receive(uint8_t c)
-{
-	if(recv_fill>=sizeof(recv_buf))
-	{
-		recv_overrun = 1;
-		return;
-	}
-
-	recv_buf[recv_head++] = c;
-	if(recv_head>=sizeof(recv_buf))
-		recv_head = 0;
-	++recv_fill;
-}
-
-SERIAL_SET_CALLBACK(receive)
-- 
2.43.0