87 lines
2.8 KiB
C
87 lines
2.8 KiB
C
/*
|
|
* FreeModbus Libary: RT-Thread Port
|
|
* Copyright (C) 2013 Armink <armink.ztl@gmail.com>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
* File: $Id: port.c,v 1.60 2015/02/01 9:18:05 Armink $
|
|
*/
|
|
|
|
/* ----------------------- System includes --------------------------------*/
|
|
|
|
/* ----------------------- Modbus includes ----------------------------------*/
|
|
#include "port.h"
|
|
/* ----------------------- Variables ----------------------------------------*/
|
|
|
|
/* ----------------------- Start implementation -----------------------------*/
|
|
void EnterCriticalSection(void) { taskENTER_CRITICAL(); }
|
|
|
|
void ExitCriticalSection(void) { taskEXIT_CRITICAL(); }
|
|
/*put bytes in buff*/
|
|
void Put_in_fifo(Serial_fifo *buff, uint8_t *putdata, int length) {
|
|
|
|
portDISABLE_INTERRUPTS();
|
|
while (length--) {
|
|
buff->buffer[buff->put_index] = *putdata;
|
|
buff->put_index += 1;
|
|
if (buff->put_index >= FIFO_SIZE_MAX)
|
|
buff->put_index = 0;
|
|
/* if the next position is read index, discard this 'read char' */
|
|
if (buff->put_index == buff->get_index) {
|
|
buff->get_index += 1;
|
|
if (buff->get_index >= FIFO_SIZE_MAX)
|
|
buff->get_index = 0;
|
|
}
|
|
}
|
|
portENABLE_INTERRUPTS();
|
|
}
|
|
/*get bytes from buff*/
|
|
int Get_from_fifo(Serial_fifo *buff, uint8_t *getdata, int length) {
|
|
int size = length;
|
|
/* read from software FIFO */
|
|
while (length) {
|
|
int ch;
|
|
/* disable interrupt */
|
|
portDISABLE_INTERRUPTS();
|
|
if (buff->get_index != buff->put_index) {
|
|
ch = buff->buffer[buff->get_index];
|
|
buff->get_index += 1;
|
|
if (buff->get_index >= FIFO_SIZE_MAX)
|
|
buff->get_index = 0;
|
|
} else {
|
|
/* no data, enable interrupt and break out */
|
|
portENABLE_INTERRUPTS();
|
|
break;
|
|
}
|
|
*getdata = ch & 0xff;
|
|
getdata++;
|
|
length--;
|
|
/* enable interrupt */
|
|
portENABLE_INTERRUPTS();
|
|
}
|
|
return size - length;
|
|
}
|
|
/*判断是否进入在中断中*/
|
|
#ifndef IS_IRQ()
|
|
extern __asm uint32_t vPortGetIPSR(void); //调用FreeRTOS API
|
|
__inline bool IS_IRQ(void) //使用内联函数提高速度
|
|
{
|
|
if (vPortGetIPSR()) {
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
#endif // MACRO
|