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Alfred Gedeon 2020-07-01 22:27:40 -07:00 • committed by alfred gedeon
parent a5dbc2b1de
commit 718178c68a
406 changed files with 108795 additions and 106323 deletions
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66
portable/IAR/AVR32_UC3/read.c
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@ -1,17 +1,18 @@
/*This file is prepared for Doxygen automatic documentation generation.*/
/*! \file *********************************************************************
*
* \brief System-specific implementation of the \ref __read function used by
the standard library.
*
* - Compiler: IAR EWAVR32
* - Supported devices: All AVR32 devices with a USART module can be used.
* - AppNote:
*
* \author Atmel Corporation: http://www.atmel.com \n
* Support and FAQ: http://support.atmel.no/
*
******************************************************************************/
*
* \brief System-specific implementation of the \ref __read function used by
* the standard library.
*
* - Compiler: IAR EWAVR32
* - Supported devices: All AVR32 devices with a USART module can be used.
* - AppNote:
*
* \author Atmel Corporation: http://www.atmel.com \n
* Support and FAQ: http://support.atmel.no/
*
******************************************************************************/
/* Copyright (c) 2007, Atmel Corporation All rights reserved.
*
@ -52,7 +53,7 @@ _STD_BEGIN
#pragma module_name = "?__read"
extern volatile avr32_usart_t *volatile stdio_usart_base;
extern volatile avr32_usart_t * volatile stdio_usart_base;
/*! \brief Reads a number of bytes, at most \a size, into the memory area
@ -65,28 +66,33 @@ extern volatile avr32_usart_t *volatile stdio_usart_base;
* \return The number of bytes read, \c 0 at the end of the file, or
* \c _LLIO_ERROR on failure.
*/
size_t __read(int handle, uint8_t *buffer, size_t size)
size_t __read( int handle,
uint8_t * buffer,
size_t size )
{
int nChars = 0;
int nChars = 0;
// This implementation only reads from stdin.
// For all other file handles, it returns failure.
if (handle != _LLIO_STDIN)
{
return _LLIO_ERROR;
}
/* This implementation only reads from stdin. */
/* For all other file handles, it returns failure. */
if( handle != _LLIO_STDIN )
{
return _LLIO_ERROR;
}
for (; size > 0; --size)
{
int c = usart_getchar(stdio_usart_base);
if (c < 0)
break;
for( ; size > 0; --size )
{
int c = usart_getchar( stdio_usart_base );
*buffer++ = c;
++nChars;
}
if( c < 0 )
{
break;
}
return nChars;
*buffer++ = c;
++nChars;
}
return nChars;
}