94 lines
2.1 KiB
C
94 lines
2.1 KiB
C
/**
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******************************************************************************
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* @file syscalls.c
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* @author Suroy Wrote with Auto-generated by STM32CubeIDE
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* @url https://suroy.cn
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* @brief STM32CubeIDE Minimal System calls file
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*
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* For more information about which c-functions
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* need which of these lowlevel functions
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* please consult the Newlib libc-manual
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2020-2022 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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#ifdef defined (__GNUC__)
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/* Includes */
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#include "Bsp.h"
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/* Variables */
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extern int __io_putchar(int ch) __attribute__((weak));
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extern int __io_getchar(void) __attribute__((weak));
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/* Functions */
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__attribute__((weak)) int _read(int file, char *ptr, int len)
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{
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(void)file;
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int DataIdx;
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for (DataIdx = 0; DataIdx < len; DataIdx++)
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{
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*ptr++ = __io_getchar();
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}
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return len;
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}
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__attribute__((weak)) int _write(int file, char *ptr, int len)
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{
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(void)file;
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int DataIdx;
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for (DataIdx = 0; DataIdx < len; DataIdx++)
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{
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__io_putchar(*ptr++);
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}
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return len;
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}
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#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
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#define GETCHAR_PROTOTYPE int __io_getchar(void)
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/**
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* 函数功能: 重定向 c库函数 printf到 DEBUG_USARTx
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* 输入参数: 无
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* 返 回 值: 无
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* 说 明：无
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*/
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PUTCHAR_PROTOTYPE
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{
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UsartSendChar(TTY_COM, ch); //阻塞式无限等待
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return ch;
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}
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/**
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* 函数功能: 重定向 c库函数 getchar,scanf到 DEBUG_USARTx
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* 输入参数: 无
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* 返 回 值: 无
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* 说 明：无
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*/
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GETCHAR_PROTOTYPE
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{
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uint8_t ch = 0;
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ch = UsartReceiveChar(TTY_COM);
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return ch;
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}
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#endif
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