From a73d0f32629447c5eb40fcfc9d1e4fcd8437aae7 Mon Sep 17 00:00:00 2001
From: gitknilch <gitknilch@cwde.de>
Date: Sun, 20 Feb 2011 13:03:41 +0100
Subject: [PATCH] more tx disabling.

---
 firmware/fnordlicht-firmware/remote.c | 5 +++++
 firmware/fnordlicht-firmware/uart.h   | 7 +++++++
 2 files changed, 12 insertions(+)

diff --git a/firmware/fnordlicht-firmware/remote.c b/firmware/fnordlicht-firmware/remote.c
index fcaf672..dcef098 100644
--- a/firmware/fnordlicht-firmware/remote.c
+++ b/firmware/fnordlicht-firmware/remote.c
@@ -430,10 +430,15 @@ void parse_config_startup(struct remote_msg_config_startup_t *msg)
     storage_save_config();
 }
 
+#if UART_TX_ENABLED
 static void wait_for_uart(void)
 {
     while (fifo_fill((fifo_t *)&global_uart.tx) != 0 || !uart_send_complete());
 }
+#else
+/* no need to wait for me */
+#define wait_for_uart()
+#endif
 
 void parse_bootloader(struct remote_msg_bootloader_t *msg)
 {
diff --git a/firmware/fnordlicht-firmware/uart.h b/firmware/fnordlicht-firmware/uart.h
index ceeb4f0..8db8f3f 100644
--- a/firmware/fnordlicht-firmware/uart.h
+++ b/firmware/fnordlicht-firmware/uart.h
@@ -38,7 +38,9 @@
 /* structs */
 struct global_uart_t {
     fifo_t rx;
+#if UART_TX_ENABLED
     fifo_t tx;
+#endif
 };
 
 /* global variables */
@@ -48,10 +50,15 @@ extern volatile struct global_uart_t global_uart;
 void uart_init(void);
 void uart_putc(uint8_t data);
 
+#if UART_TX_ENABLED
 static inline bool uart_send_complete(void)
 {
     return _BV(_UDRE_UART0) & _UCSRA_UART0;
 }
+#else
+/* we're never incomplete, never. */
+#define uart_send_complete()  1
+#endif
 
 #endif
 
-- 
2.39.2