338 lines
8.9 KiB
C
338 lines
8.9 KiB
C
//*****************************************************************************
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// uart_if.c
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//
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// uart interface file: Prototypes and Macros for UARTLogger
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//
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// Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
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//
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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//
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// Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the
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// distribution.
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//
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// Neither the name of Texas Instruments Incorporated nor the names of
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// its contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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//*****************************************************************************
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// Standard includes
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#include <stdarg.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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// Driverlib includes
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#include "hw_types.h"
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#include "hw_memmap.h"
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#include "prcm.h"
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#include "pin.h"
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#include "uart.h"
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#include "rom.h"
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#include "rom_map.h"
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#if defined(USE_FREERTOS) || defined(USE_TI_RTOS)
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#include "osi.h"
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#endif
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#include "uart_if.h"
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#define IS_SPACE(x) (x == 32 ? 1 : 0)
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//*****************************************************************************
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// Global variable indicating command is present
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//*****************************************************************************
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static unsigned long __Errorlog;
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//*****************************************************************************
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// Global variable indicating input length
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//*****************************************************************************
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unsigned int ilen=1;
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//*****************************************************************************
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//
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//! Initialization
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//!
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//! This function
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//! 1. Configures the UART to be used.
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//!
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//! \return none
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//
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//*****************************************************************************
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void
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InitTerm()
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{
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#ifndef NOTERM
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MAP_UARTConfigSetExpClk(CONSOLE,MAP_PRCMPeripheralClockGet(CONSOLE_PERIPH),
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UART_BAUD_RATE, (UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE |
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UART_CONFIG_PAR_NONE));
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#endif
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__Errorlog = 0;
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}
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//*****************************************************************************
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//
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//! Outputs a character string to the console
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//!
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//! \param str is the pointer to the string to be printed
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//!
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//! This function
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//! 1. prints the input string character by character on to the console.
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//!
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//! \return none
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//
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//*****************************************************************************
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void
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Message(const char *str)
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{
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#ifndef NOTERM
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if(str != NULL)
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{
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while(*str!='\0')
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{
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MAP_UARTCharPut(CONSOLE,*str++);
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}
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}
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#endif
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}
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//*****************************************************************************
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//
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//! Clear the console window
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//!
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//! This function
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//! 1. clears the console window.
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//!
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//! \return none
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//
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//*****************************************************************************
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void
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ClearTerm()
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{
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Message("\33[2J\r");
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}
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//*****************************************************************************
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//
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//! Error Function
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//!
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//! \param
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//!
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//! \return none
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//!
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//*****************************************************************************
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void
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Error(char *pcFormat, ...)
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{
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#ifndef NOTERM
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char cBuf[256];
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va_list list;
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va_start(list,pcFormat);
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vsnprintf(cBuf,256,pcFormat,list);
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Message(cBuf);
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#endif
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__Errorlog++;
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}
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//*****************************************************************************
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//
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//! Get the Command string from UART
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//!
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//! \param pucBuffer is the command store to which command will be populated
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//! \param ucBufLen is the length of buffer store available
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//!
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//! \return Length of the bytes received. -1 if buffer length exceeded.
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//!
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//*****************************************************************************
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int
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GetCmd(char *pcBuffer, unsigned int uiBufLen)
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{
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char cChar;
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int iLen = 0;
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//
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// Wait to receive a character over UART
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//
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while(MAP_UARTCharsAvail(CONSOLE) == false)
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{
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#if defined(USE_FREERTOS) || defined(USE_TI_RTOS)
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osi_Sleep(1);
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#endif
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}
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cChar = MAP_UARTCharGetNonBlocking(CONSOLE);
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//
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// Echo the received character
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//
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MAP_UARTCharPut(CONSOLE, cChar);
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iLen = 0;
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//
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// Checking the end of Command
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//
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while((cChar != '\r') && (cChar !='\n') )
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{
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//
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// Handling overflow of buffer
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//
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if(iLen >= uiBufLen)
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{
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return -1;
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}
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//
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// Copying Data from UART into a buffer
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//
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if(cChar != '\b')
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{
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*(pcBuffer + iLen) = cChar;
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iLen++;
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}
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else
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{
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//
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// Deleting last character when you hit backspace
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//
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if(iLen)
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{
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iLen--;
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}
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}
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//
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// Wait to receive a character over UART
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//
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while(MAP_UARTCharsAvail(CONSOLE) == false)
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{
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#if defined(USE_FREERTOS) || defined(USE_TI_RTOS)
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osi_Sleep(1);
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#endif
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}
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cChar = MAP_UARTCharGetNonBlocking(CONSOLE);
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//
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// Echo the received character
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//
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MAP_UARTCharPut(CONSOLE, cChar);
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}
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*(pcBuffer + iLen) = '\0';
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Report("\n\r");
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return iLen;
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}
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//*****************************************************************************
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//
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//! Trim the spaces from left and right end of given string
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//!
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//! \param Input string on which trimming happens
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//!
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//! \return length of trimmed string
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//
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//*****************************************************************************
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int TrimSpace(char * pcInput)
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{
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size_t size;
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char *endStr, *strData = pcInput;
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char index = 0;
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size = strlen(strData);
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if (!size)
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return 0;
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endStr = strData + size - 1;
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while (endStr >= strData && IS_SPACE(*endStr))
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endStr--;
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*(endStr + 1) = '\0';
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while (*strData && IS_SPACE(*strData))
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{
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strData++;
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index++;
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}
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memmove(pcInput,strData,strlen(strData)+1);
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return strlen(pcInput);
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}
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//*****************************************************************************
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//
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//! prints the formatted string on to the console
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//!
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//! \param format is a pointer to the character string specifying the format in
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//! the following arguments need to be interpreted.
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//! \param [variable number of] arguments according to the format in the first
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//! parameters
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//! This function
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//! 1. prints the formatted error statement.
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//!
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//! \return count of characters printed
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//
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//*****************************************************************************
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int Report(const char *pcFormat, ...)
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{
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int iRet = 0;
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#ifndef NOTERM
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char *pcBuff, *pcTemp;
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int iSize = 256;
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va_list list;
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pcBuff = (char*)malloc(iSize);
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if(pcBuff == NULL)
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{
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return -1;
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}
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while(1)
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{
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va_start(list,pcFormat);
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iRet = vsnprintf(pcBuff,iSize,pcFormat,list);
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va_end(list);
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if(iRet > -1 && iRet < iSize)
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{
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break;
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}
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else
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{
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iSize*=2;
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if((pcTemp=realloc(pcBuff,iSize))==NULL)
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{
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Message("Could not reallocate memory\n\r");
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iRet = -1;
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break;
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}
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else
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{
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pcBuff=pcTemp;
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}
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}
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}
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Message(pcBuff);
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free(pcBuff);
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#endif
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return iRet;
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}
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