rtdbms.cpp

来自「一个完整的RTU程序源码,用DOS平台,支持16串口,在天津港用的很多,8个规约」· C++ 代码 · 共 113 行

#include "common.h"

yxbw_buf_t yxbw_buf;// yx bw buffer used in nbb protocol
soe_buf_t soe_buf;// soe buffer for each port
memdb_data_t dbdata;

void rtdbmsinit(void)
{
	memset(&dbdata, 0, sizeof(memdb_data_t));
}

void insert_soe(soe_record_t *ptr)
{
	int i;

	OS_ENTER_CRITICAL();

	memcpy(&soe_buf.buf[soe_buf.write], ptr, sizeof(soe_record_t));
	soe_buf.write++;
	if (soe_buf.write >= YXBW_BUF_SIZE) soe_buf.write = 0;
	// write pointer out of boundary

	for (i = 0; i < MAX_PORT; i++) {
		if (soe_buf.count[i] >= YXBW_BUF_SIZE) {	// buffer overflow
			soe_buf.read[i]++;
			if (soe_buf.read[i] >= YXBW_BUF_SIZE)	// drop lastest one
				soe_buf.read[i] = 0;
		}
		else soe_buf.count[i]++;
	}
	OS_EXIT_CRITICAL();
}

// judge having soe or not
BOOLEAN is_soe(INT8U portno)
{
	if (soe_buf.count[portno] == 0)	return (FALSE);
	else return (TRUE);
}

// get a soe from soe queue
void get_soe(INT8U portno, soe_record_t *ptr)
{
	if (portno >= MAX_PORT) return; // only SLAVE protocol have soe
	OS_ENTER_CRITICAL();
	if (soe_buf.count[portno] > 0) {
		memcpy(ptr, &soe_buf.buf[soe_buf.read[portno]], sizeof(soe_record_t));
		soe_buf.read[portno]++;
		soe_buf.count[portno]--;                  // decrease soe amount

		if (soe_buf.read[portno] >= YXBW_BUF_SIZE)
			soe_buf.read[portno] = 0;						// read pointer out of boundary
	}
	OS_EXIT_CRITICAL();
}

INT16U get_soe_num(INT8U portno)
{
	return (soe_buf.count[portno]);
}

INT16U get_yx_bw_num(INT8U portno)
{
	return (yxbw_buf.count[portno]);
}

// insert a yxbw to yxbw queue
// new one overwrite old one
void insert_yx_bw(yxbw_record_t *ptr)
{
	int i;

	OS_ENTER_CRITICAL();

	memcpy(&yxbw_buf.buf[yxbw_buf.write], ptr, sizeof(yxbw_record_t));
	yxbw_buf.write++;
	if (yxbw_buf.write >= YXBW_BUF_SIZE) yxbw_buf.write = 0;
	// write pointer out of boundary

	for (i = 0; i < MAX_PORT; i++) {
		if (yxbw_buf.count[i] >= YXBW_BUF_SIZE) {	// buffer overflow
			yxbw_buf.read[i]++;
			if (yxbw_buf.read[i] >= YXBW_BUF_SIZE)	// drop lastest one
				yxbw_buf.read[i] = 0;
		}
		else yxbw_buf.count[i]++;
	}

	OS_EXIT_CRITICAL();
}

// judge having yxbw or not
BOOLEAN is_yx_bw(INT8U portno)
{
	if (yxbw_buf.count[portno] == 0)	return (FALSE);
	else return (TRUE);
}

// get a yxbw from yxbw queue
void get_yx_bw(INT8U portno, yxbw_record_t *ptr)
{
	if (portno >= MAX_PORT) return; // only SLAVE protocol have soe
	OS_ENTER_CRITICAL();
	if (yxbw_buf.count[portno] > 0) {
		memcpy(ptr, &yxbw_buf.buf[yxbw_buf.read[portno]], sizeof(yxbw_record_t));
		yxbw_buf.read[portno]++;
		yxbw_buf.count[portno]--;                  // decrease soe amount

		if (yxbw_buf.read[portno] >= YXBW_BUF_SIZE)
			yxbw_buf.read[portno] = 0;						// read pointer out of boundary
	}
	OS_EXIT_CRITICAL();
}