UART.h

// UART.h
// Runs on LM3S811, LM3S1968, LM3S8962, LM4F120
// Simple device driver for the UART.  This version of the UART
// driver uses UART1 instead of UART0 and has fewer character
// I/O functions compared to the example project UART_4F120.
// Daniel Valvano
// August 1, 2013
// Modified by EE345L students Charlie Gough && Matt Hawk
// Modified by EE345M students Agustinus Darmawan && Mingjie Qiu

/* This example accompanies the book
   "Embedded Systems: Real Time Interfacing to Arm Cortex M Microcontrollers",
   ISBN: 978-1463590154, Jonathan Valvano, copyright (c) 2013
   Program 4.12, Section 4.9.4, Figures 4.26 and 4.40

 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/
 */

// U1Rx connected to PC4
// U1Tx connected to PC5

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

//------------UART_Init------------
// 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 UART1_Init(void);

//------------UART_InChar------------
// Wait for new serial port input
// Input: none
// Output: ASCII code for key typed
unsigned char UART1_InChar(void);

//------------UART_InCharNonBlocking------------
// Get oldest serial port input and return immediately
// if there is no data.
// Input: none
// Output: ASCII code for key typed or 0 if no character
unsigned char UART1_InCharNonBlocking(void);

//------------UART_OutChar------------
// Output 8-bit to serial port
// Input: letter is an 8-bit ASCII character to be transferred
// Output: none
void UART1_OutChar(unsigned char data);