uart bridge: try to reduce latency.

Start sending to the network immediately when data arrives at the UART.
Don't wait for the next slow timer to fire.

dispatch.c

@@ -52,7 +52,7 @@ string_new(static, uart_socket_receive_buffer, 128);
 string_new(static, uart_socket_send_buffer, 128);
 static lwip_if_socket_t uart_socket;
 
-static bool uart_bridge_active = false;
+bool uart_bridge_active = false;
 
 static os_timer_t fast_timer;
 static os_timer_t slow_timer;

dispatch.h

@@ -36,6 +36,8 @@ typedef enum
 	fsb_sequencer,
 } flash_sector_buffer_use_t;
 
+extern	bool uart_bridge_active;
+
 extern	string_t					flash_sector_buffer;
 extern	flash_sector_buffer_use_t	flash_sector_buffer_use;
 

uart.c

@@ -203,6 +203,10 @@ void uart_task(struct ETSEventTag *event)
 		case(uart_task_fetch_fifo):
 		{
 			fetch_queue(0);
+
+			if(uart_bridge_active)
+				dispatch_post_command(command_task_uart_bridge);
+
 			break;
 		}