Fixed Serial peripheral driver not turning off the USART before reconfiguring it...

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

diff --git a/LUFA/Drivers/Peripheral/Serial.h b/LUFA/Drivers/Peripheral/Serial.h
index 4eb74b9..47f65ea 100644 (file)
--- a/LUFA/Drivers/Peripheral/Serial.h
+++ b/LUFA/Drivers/Peripheral/Serial.h
@@ -99,27 +99,27 @@
                        static inline void Serial_Init(const uint32_t BaudRate,
                                                       const bool DoubleSpeed)
                        {
+                               UBRR1  = (DoubleSpeed ? SERIAL_2X_UBBRVAL(BaudRate) : SERIAL_UBBRVAL(BaudRate));
+
+                               UCSR1C = ((1 << UCSZ11) | (1 << UCSZ10));
                                UCSR1A = (DoubleSpeed ? (1 << U2X1) : 0);
                                UCSR1B = ((1 << TXEN1)  | (1 << RXEN1));
-                               UCSR1C = ((1 << UCSZ11) | (1 << UCSZ10));
                                
-                               DDRD  |= (1 << 3);      
+                               DDRD  |= (1 << 3);
                                PORTD |= (1 << 2);
-                               
-                               UBRR1  = (DoubleSpeed ? SERIAL_2X_UBBRVAL(BaudRate) : SERIAL_UBBRVAL(BaudRate));
                        }
 
                        /** Turns off the USART driver, disabling and returning used hardware to their default configuration. */
                        static inline void Serial_ShutDown(void)
                        {
-                               UCSR1A = 0;
                                UCSR1B = 0;
+                               UCSR1A = 0;
                                UCSR1C = 0;
+
+                               UBRR1  = 0;
                                
-                               DDRD  &= ~(1 << 3);     
+                               DDRD  &= ~(1 << 3);
                                PORTD &= ~(1 << 2);
-                               
-                               UBRR1  = 0;
                        }
 
                        /** Indicates whether a character has been received through the USART.
@@ -143,7 +143,9 @@
                                UDR1 = DataByte;
                        }
 
-                       /** Receives a byte from the USART.
+                       /** Receives a byte from the USART. This function blocks until a byte has been
+                        *  received; if non-blocking behaviour is required, test for a received character
+                        *  beforehand with \ref Serial_IsCharReceived().
                         *
                         *  \return Byte received from the USART.
                         */