X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/fnordlicht-mini/blobdiff_plain/e06282dce0420369b589ec793c567a8a2cc48603..a73d0f32629447c5eb40fcfc9d1e4fcd8437aae7:/firmware/fnordlicht-firmware/uart.h

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