UART.h

// UART.h
// Runs on LM4F120/TM4C123
// Simple device driver for the UART.
// Daniel Valvano
// June 17, 2013

/* This example accompanies the books
  "Embedded Systems: Introduction to ARM Cortex M Microcontrollers",
  ISBN: 978-1469998749, Jonathan Valvano, copyright (c) 2013

"Embedded Systems: Real Time Interfacing to ARM Cortex M Microcontrollers",
   ISBN: 978-1463590154, Jonathan Valvano, copyright (c) 2013
 
 Copyright 2013 by Jonathan W. Valvano, valvano@mail.utexas.edu
    You may use, edit, run or distribute this file
    as long as the above copyright notice remains
 THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
 OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
 VALVANO SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL,
 OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
 For more information about my classes, my research, and my books, see
 http://users.ece.utexas.edu/~valvano/
 */

// U0Rx (VCP receive) connected to PA0
// U0Tx (VCP transmit) connected to PA1

// standard ASCII symbols
#define CR   0x0D
#define LF   0x0A
#define BS   0x08
#define ESC  0x1B
#define SP   0x20
#define DEL  0x7F

//------------UART_InChar------------
// Wait for new serial port input
// Initialize the UART for 115,200 baud rate (assuming 80 MHz clock),
// 8 bit word length, no parity bits, one stop bit, FIFOs enabled
// Input: none
// Output: none
void UART_Init(void);

//------------UART_InChar------------
// Wait for new serial port input
// Input: none
// Output: ASCII code for key typed
unsigned char UART_InChar(void);

//------------UART_OutChar------------
// Output 8-bit to serial port
// Input: letter is an 8-bit ASCII character to be transferred
// Output: none
void UART_OutChar(unsigned char data);