From f1c9cea4895fae6fa277bf80aafb9eec203f8680 Mon Sep 17 00:00:00 2001
From: Martin Mueller <martin@pfump.org>
Date: Wed, 25 May 2005 21:38:56 +0000
Subject: [PATCH] Changed to simple bit-banging - can be used with all
 baudrates now.

---
 sw/airborne/autopilot/test/uart_tunnel.c | 43 ++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/sw/airborne/autopilot/test/uart_tunnel.c b/sw/airborne/autopilot/test/uart_tunnel.c
index 2bb79257a8..ca1f9d50a6 100644
--- a/sw/airborne/autopilot/test/uart_tunnel.c
+++ b/sw/airborne/autopilot/test/uart_tunnel.c
@@ -8,6 +8,19 @@
 #include "../uart.h"
 #include "../timer.h"
 
+#define UART_PC_PORT    PORTE
+#define UART_PC_DDR     DDRE
+#define UART_PC_PIN     PINE
+#define UART_PC_TX      1
+#define UART_PC_RX      0
+
+#define UART_PERPH_PORT PORTD
+#define UART_PERPH_DDR  DDRD
+#define UART_PERPH_PIN  PIND
+#define UART_PERPH_TX   3
+#define UART_PERPH_RX   2
+
+
 void on_uart0_rx(uint8_t c) {
   uart1_transmit(c);
 }
@@ -20,6 +33,36 @@ ReceiveUart0(on_uart0_rx)
 ReceiveUart1(on_uart1_rx)
    
 int main( void ) {
+
+  /* setup PC_TX as output */
+  UART_PC_DDR |= _BV(UART_PC_TX);
+  
+  /* setup PC_RX as input, no pullup */
+  UART_PC_DDR &= ~_BV(UART_PC_RX);
+  UART_PC_PORT &= ~_BV(UART_PC_RX);
+  
+  /* setup PERPH_TX as output */
+  UART_PERPH_DDR |= _BV(UART_PERPH_TX);
+  
+  /* setup PERPH_RX as input, no pullup */
+  UART_PERPH_DDR &= ~_BV(UART_PERPH_RX);
+  UART_PERPH_PORT &= ~_BV(UART_PERPH_RX);
+  
+  while(1)
+  {
+    if (bit_is_set(UART_PERPH_PIN, UART_PERPH_RX)) {
+      sbi(UART_PC_PORT, UART_PC_TX);
+    } else {
+      cbi(UART_PC_PORT, UART_PC_TX);
+    }
+    if (bit_is_set(UART_PC_PIN, UART_PC_RX)) {
+      sbi(UART_PERPH_PORT, UART_PERPH_TX);
+    } else {
+      cbi(UART_PERPH_PORT, UART_PERPH_TX);
+    }
+    
+  }
+  
   uart0_init();
   uart1_init();