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2026-06-10

通过DMA写入指定地址的双精度浮点数 - DmaWriteDouble ​

函数简介 ​

通过 DMA 写入指定地址的双精度浮点数，支持 CE 地址格式。(高级版功能,普通版无法使用)

接口名称 ​

DmaWriteDouble

DLL调用 ​

c
int32_t OLA_CALL_TYPE DmaWriteDouble(int64_t instance, int64_t deviceId, int32_t pid, OLA_STRING_INPUT addr, double double_value);

参数说明 ​

参数名类型说明
instance长整数型OLAPlug对象的指针，由 CreateCOLAPlugInterFace 接口生成。
deviceId长整数型设备ID
pid整数型进程 PID
addr字符串地址，支持 CE 数据格式
double_value双精度浮点数要写入的浮点数值

示例 ​

SDK 调用 ​

cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
int ret = ola.DmaWriteDouble(0, 1234, "value", 1.0);
csharp
using OLAPlug;

var ola = new OLAPlugServer();
int ret = ola.DmaWriteDouble(0, 1234, "value", 1.0);
python
from OLAPlugServer import OLAPlugServer

ola = OLAPlugServer()
ret = ola.DmaWriteDouble(0, 1234, "value", 1.0)
java
import com.olaplug.OLAPlugServer;

OLAPlugServer ola = new OLAPlugServer();
int ret = ola.DmaWriteDouble(0, 1234, "value", 1.0);
cpp
var ola = com("OlaPlug.OlaSoft")
var ret = ola.DmaWriteDouble(0, 1234, "value", 1.0)
vbscript
Set ola = CreateObject("OlaPlug.OlaSoft")
ret = ola.DmaWriteDouble(0, 1234, "value", 1.0)
text
.局部变量 ola, OLAPlug
ola.创建 ()
ret ＝ ola.DmaWriteDouble(0, 1234, “value”, 1.0)
aardio
import OLAPlugServer;
var ola = OLAPlugServer();
var ret = ola.DmaWriteDouble(0, 1234, "value", 1.0);
text
变量 ola <类型 = OLAPlugServer>
ola = 新建 OLAPlugServer
整数 ret = ola.DmaWriteDouble(0, 1234, "value", 1.0)
cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
int32_t ret = ola.DmaWriteDouble(0, 1234, "value", 1.0);

原生 DLL 调用 ​

cpp
DmaWriteDouble(instance, 0, 1234, "value", 1.0);
csharp
using System.Runtime.InteropServices;
using System.Text;

[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern int DmaWriteDouble(long ola, int deviceId, int pid, string addr, int double_value);

DmaWriteDouble(instance, 0, 1234, "value", 1.0);
python
from ctypes import CDLL, c_int, c_int64, create_string_buffer

ola = CDLL("OLAPlug_x64.dll")
ola.CreateCOLAPlugInterFace.restype = c_int64
ola.DmaWriteDouble(instance, 0, 1234, "value", 1.0)

返回值 ​

整数型：1 成功，0 失败。