Rename PDIProtocol.c/.h to XPROGProtocol.c/.h as it will now handle both TPI and...

[pub/USBasp.git] / LUFA / Drivers / Peripheral / Serial.h

diff --git a/LUFA/Drivers/Peripheral/Serial.h b/LUFA/Drivers/Peripheral/Serial.h
index 82cbcfc..326d0fd 100644 (file)
--- a/LUFA/Drivers/Peripheral/Serial.h
+++ b/LUFA/Drivers/Peripheral/Serial.h
@@ -41,7 +41,8 @@
  *    - LUFA/Drivers/Peripheral/Serial.c\r
  *\r
  *  \section Module Description\r
- *  Functions, macros, variables, enums and types related to the setup of the USART for serial communications.\r
+ *  Hardware serial USART driver. This module provides an easy to use driver for\r
+ *  the setup of and transfer of data over the AVR's USART port.\r
  *\r
  *  @{\r
  */\r
@@ -67,12 +68,12 @@
                        /** Macro for calculating the baud value from a given baud rate when the U2X (double speed) bit is\r
                         *  not set.\r
                         */\r
-                       #define SERIAL_UBBRVAL(baud)    (((F_CPU / 16) / baud) - 1)\r
+                       #define SERIAL_UBBRVAL(baud)    (((F_CPU / 16) / (baud)) - 1)\r
 \r
                        /** Macro for calculating the baud value from a given baud rate when the U2X (double speed) bit is\r
                         *  set.\r
                         */\r
-                       #define SERIAL_2X_UBBRVAL(baud) (((F_CPU / 8) / baud) - 1)\r
+                       #define SERIAL_2X_UBBRVAL(baud) (((F_CPU / 8) / (baud)) - 1)\r
 \r
                /* Pseudo-Function Macros: */\r
                        #if defined(__DOXYGEN__)\r
@@ -99,7 +100,7 @@
                        void Serial_TxString(const char *StringPtr) ATTR_NON_NULL_PTR_ARG(1);\r
 \r
                /* Inline Functions: */\r
-                       /** Initializes the USART, ready for serial data transmission and reception. This initialises the interface to\r
+                       /** Initializes the USART, ready for serial data transmission and reception. This initializes the interface to\r
                         *  standard 8-bit, no parity, 1 stop bit settings suitable for most applications.\r
                         *\r
                         *  \param[in] BaudRate     Serial baud rate, in bits per second\r
@@ -117,6 +118,19 @@
                                UBRR1  = (DoubleSpeed ? SERIAL_2X_UBBRVAL(BaudRate) : SERIAL_UBBRVAL(BaudRate));\r
                        }\r
 \r
+                       /** Turns off the USART driver, disabling and returning used hardware to their default configuration. */\r
+                       static inline void Serial_ShutDown(void)\r
+                       {\r
+                               UCSR1A = 0;\r
+                               UCSR1B = 0;\r
+                               UCSR1C = 0;\r
+                               \r
+                               DDRD  &= ~(1 << 3);     \r
+                               PORTD &= ~(1 << 2);\r
+                               \r
+                               UBRR1  = 0;\r
+                       }\r
+                       \r
                        /** Transmits a given byte through the USART.\r
                         *\r
                         *  \param[in] DataByte  Byte to transmit through the USART\r