nuc980开发板使用Agile Modbus软件包-基于 rs485 通讯

2023-12-26 19:44

本文主要是介绍nuc980开发板使用Agile Modbus软件包-基于 rs485 通讯,希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!

一、nuc980开发板电路

打开 nuc980-eth2p 开发板原理图,如下:
在这里插入图片描述
将JP1跳线帽连接到rs485。使用rs485转usb连接到电脑即可。
除了收发引脚,多了一个控制引脚。

linux内核使能串口4
在这里插入图片描述

二、Agile Modbus软件包

1、软件包的获取

下载网址
选择最新版即可。
在这里插入图片描述

2、软件包的demo

打开下载的文件,文件工程的结构如下,包含doc、examples、inc、src等文件。
在这里插入图片描述
因为我们是 rtu-master,所以打开官方自带的 rtu_master 文件夹。查看串口初始化部分。
在这里插入图片描述

int serial_init(const char *device,int baud, char parity, int data_bit,int stop_bit, struct termios *old_tios)
{struct termios tios;speed_t speed;int flags;/* The O_NOCTTY flag tells UNIX that this program doesn't wantto be the "controlling terminal" for that port. If youdon't specify this then any input (such as keyboard abortsignals and so forth) will affect your processTimeouts are ignored in canonical input mode or when theNDELAY option is set on the file via open or fcntl */flags = O_RDWR | O_NOCTTY | O_NDELAY | O_EXCL;
#ifdef O_CLOEXECflags |= O_CLOEXEC;
#endifint s = open(device, flags);if (s == -1) {LOG_E("ERROR Can't open the device %s (%s)", device, strerror(errno));return -1;}flags = fcntl(s, F_GETFL, 0);flags |= O_NONBLOCK;fcntl(s, F_SETFL, flags);flags = fcntl(s, F_GETFD);flags |= FD_CLOEXEC;fcntl(s, F_SETFD, flags);/* Save */tcgetattr(s, old_tios);memset(&tios, 0, sizeof(struct termios));/* C_ISPEED     Input baud (new interface)C_OSPEED     Output baud (new interface)*/switch (baud) {case 110:speed = B110;break;case 300:speed = B300;break;case 600:speed = B600;break;case 1200:speed = B1200;break;case 2400:speed = B2400;break;case 4800:speed = B4800;break;case 9600:speed = B9600;break;case 19200:speed = B19200;break;case 38400:speed = B38400;break;
#ifdef B57600case 57600:speed = B57600;break;
#endif
#ifdef B115200case 115200:speed = B115200;break;
#endif
#ifdef B230400case 230400:speed = B230400;break;
#endif
#ifdef B460800case 460800:speed = B460800;break;
#endif
#ifdef B500000case 500000:speed = B500000;break;
#endif
#ifdef B576000case 576000:speed = B576000;break;
#endif
#ifdef B921600case 921600:speed = B921600;break;
#endif
#ifdef B1000000case 1000000:speed = B1000000;break;
#endif
#ifdef B1152000case 1152000:speed = B1152000;break;
#endif
#ifdef B1500000case 1500000:speed = B1500000;break;
#endif
#ifdef B2500000case 2500000:speed = B2500000;break;
#endif
#ifdef B3000000case 3000000:speed = B3000000;break;
#endif
#ifdef B3500000case 3500000:speed = B3500000;break;
#endif
#ifdef B4000000case 4000000:speed = B4000000;break;
#endifdefault:speed = B9600;LOG_W("WARNING Unknown baud rate %d for %s (B9600 used)", baud, device);}/* Set the baud rate */if ((cfsetispeed(&tios, speed) < 0) ||(cfsetospeed(&tios, speed) < 0)) {close(s);s = -1;return -1;}/* C_CFLAG      Control optionsCLOCAL       Local line - do not change "owner" of portCREAD        Enable receiver*/tios.c_cflag |= (CREAD | CLOCAL);/* CSIZE, HUPCL, CRTSCTS (hardware flow control) *//* Set data bits (5, 6, 7, 8 bits)CSIZE        Bit mask for data bits*/tios.c_cflag &= ~CSIZE;switch (data_bit) {case 5:tios.c_cflag |= CS5;break;case 6:tios.c_cflag |= CS6;break;case 7:tios.c_cflag |= CS7;break;case 8:default:tios.c_cflag |= CS8;break;}/* Stop bit (1 or 2) */if (stop_bit == 1)tios.c_cflag &= ~CSTOPB;else /* 2 */tios.c_cflag |= CSTOPB;/* PARENB       Enable parity bitPARODD       Use odd parity instead of even */if (parity == 'N') {/* None */tios.c_cflag &= ~PARENB;} else if (parity == 'E') {/* Even */tios.c_cflag |= PARENB;tios.c_cflag &= ~PARODD;} else {/* Odd */tios.c_cflag |= PARENB;tios.c_cflag |= PARODD;}/* Read the man page of termios if you need more information. *//* This field isn't used on POSIX systemstios.c_line = 0;*//* C_LFLAG      Line optionsISIG Enable SIGINTR, SIGSUSP, SIGDSUSP, and SIGQUIT signalsICANON       Enable canonical input (else raw)XCASE        Map uppercase \lowercase (obsolete)ECHO Enable echoing of input charactersECHOE        Echo erase character as BS-SP-BSECHOK        Echo NL after kill characterECHONL       Echo NLNOFLSH       Disable flushing of input buffers afterinterrupt or quit charactersIEXTEN       Enable extended functionsECHOCTL      Echo control characters as ^char and delete as ~?ECHOPRT      Echo erased character as character erasedECHOKE       BS-SP-BS entire line on line killFLUSHO       Output being flushedPENDIN       Retype pending input at next read or input charTOSTOP       Send SIGTTOU for background outputCanonical input is line-oriented. Input characters are putinto a buffer which can be edited interactively by the useruntil a CR (carriage return) or LF (line feed) character isreceived.Raw input is unprocessed. Input characters are passedthrough exactly as they are received, when they arereceived. Generally you'll deselect the ICANON, ECHO,ECHOE, and ISIG options when using raw input*//* Raw input */tios.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);/* C_IFLAG      Input optionsConstant     DescriptionINPCK        Enable parity checkIGNPAR       Ignore parity errorsPARMRK       Mark parity errorsISTRIP       Strip parity bitsIXON Enable software flow control (outgoing)IXOFF        Enable software flow control (incoming)IXANY        Allow any character to start flow againIGNBRK       Ignore break conditionBRKINT       Send a SIGINT when a break condition is detectedINLCR        Map NL to CRIGNCR        Ignore CRICRNL        Map CR to NLIUCLC        Map uppercase to lowercaseIMAXBEL      Echo BEL on input line too long*/if (parity == 'N') {/* None */tios.c_iflag &= ~INPCK;} else {tios.c_iflag |= INPCK;}/* Software flow control is disabled */tios.c_iflag &= ~(IXON | IXOFF | IXANY);/* C_OFLAG      Output optionsOPOST        Postprocess output (not set = raw output)ONLCR        Map NL to CR-NLONCLR ant others needs OPOST to be enabled*//* Raw ouput */tios.c_oflag &= ~OPOST;/* C_CC         Control charactersVMIN         Minimum number of characters to readVTIME        Time to wait for data (tenths of seconds)UNIX serial interface drivers provide the ability tospecify character and packet timeouts. Two elements of thec_cc array are used for timeouts: VMIN and VTIME. Timeoutsare ignored in canonical input mode or when the NDELAYoption is set on the file via open or fcntl.VMIN specifies the minimum number of characters to read. Ifit is set to 0, then the VTIME value specifies the time towait for every character read. Note that this does not meanthat a read call for N bytes will wait for N characters tocome in. Rather, the timeout will apply to the firstcharacter and the read call will return the number ofcharacters immediately available (up to the number yourequest).If VMIN is non-zero, VTIME specifies the time to wait forthe first character read. If a character is read within thetime given, any read will block (wait) until all VMINcharacters are read. That is, once the first character isread, the serial interface driver expects to receive anentire packet of characters (VMIN bytes total). If nocharacter is read within the time allowed, then the call toread returns 0. This method allows you to tell the serialdriver you need exactly N bytes and any read call willreturn 0 or N bytes. However, the timeout only applies tothe first character read, so if for some reason the drivermisses one character inside the N byte packet then the readcall could block forever waiting for additional inputcharacters.VTIME specifies the amount of time to wait for incomingcharacters in tenths of seconds. If VTIME is set to 0 (thedefault), reads will block (wait) indefinitely unless theNDELAY option is set on the port with open or fcntl.*//* Unused because we use open with the NDELAY option */tios.c_cc[VMIN] = 0;tios.c_cc[VTIME] = 0;if (tcsetattr(s, TCSANOW, &tios) < 0) {close(s);s = -1;return -1;}return s;
}

修改Makefile文件
在这里插入图片描述
将 gcc 改为 arm-linux-gcc

CC = arm-linux-gcc -std=gnu99

此时编译并下载到开发板,肯定不能正常通信,还需要对 serial.c 文件进行适当的修改。

三、修改思路

思路:通过对控制引脚的控制,来控制数据的接收和发送。
方法1
不修改串口的初始化,通过配置控制引脚的输出高低电平来操作数据的收发。
方法2
修改串口的初始化,配置为rs485模式,配置 RTS的引脚即可。
文章主要介绍方法2。
rs485收发测试可参考linux 串口测试指令和测试程序

四、串口配置修改

添加头文件

#include <sys/types.h>
#include <sys/stat.h> 
#include <pthread.h>
#include <linux/serial.h>

初始化添加代码

int portfd;#if (__GNUC__ == 4 && __GNUC_MINOR__ == 3)struct my_serial_rs485 rs485conf;struct my_serial_rs485 rs485conf_bak;
#elsestruct serial_rs485 rs485conf;
#endif	portfd=s;if (ioctl (portfd, TIOCGRS485, &rs485conf) < 0) {/* Error handling.*/ printf("ioctl TIOCGRS485 error.\n");}/* Enable RS485 mode: */rs485conf.flags |= SER_RS485_ENABLED;/* Set logical level for RTS pin equal to 1 when sending: */rs485conf.flags |= SER_RS485_RTS_ON_SEND;/* set logical level for RTS pin equal to 0 after sending: */ rs485conf.flags &= ~(SER_RS485_RTS_AFTER_SEND);/* Set rts delay after send, if needed: */rs485conf.delay_rts_after_send = 0x80;if (ioctl (portfd, TIOCSRS485, &rs485conf) < 0){/* Error handling.*/ printf("ioctl TIOCSRS485 error.\n");}else{printf("rs485conf.flags 0x%x.\n", rs485conf.flags);printf("rs485conf.delay_rts_before_send 0x%x.\n", rs485conf.delay_rts_before_send);printf("rs485conf.delay_rts_after_send 0x%x.\n", rs485conf.delay_rts_after_send);}

serial.c 整体代码

#include "serial.h"
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <termios.h>
#include <unistd.h>#include <sys/types.h>
#include <sys/stat.h> 
#include <pthread.h>
#include <linux/serial.h>#define DBG_ENABLE
#define DBG_COLOR
#define DBG_SECTION_NAME "serial"
#define DBG_LEVEL        DBG_LOG
#include "dbg_log.h"int serial_init(const char *device,int baud, char parity, int data_bit,int stop_bit, struct termios *old_tios)
{struct termios tios;speed_t speed;int flags;/* The O_NOCTTY flag tells UNIX that this program doesn't wantto be the "controlling terminal" for that port. If youdon't specify this then any input (such as keyboard abortsignals and so forth) will affect your processTimeouts are ignored in canonical input mode or when theNDELAY option is set on the file via open or fcntl */flags = O_RDWR | O_NOCTTY | O_NDELAY | O_EXCL;
#ifdef O_CLOEXECflags |= O_CLOEXEC;
#endifint s = open(device, flags);if (s == -1) {LOG_E("ERROR Can't open the device %s (%s)", device, strerror(errno));return -1;}flags = fcntl(s, F_GETFL, 0);flags |= O_NONBLOCK;fcntl(s, F_SETFL, flags);flags = fcntl(s, F_GETFD);flags |= FD_CLOEXEC;fcntl(s, F_SETFD, flags);/* Save */tcgetattr(s, old_tios);memset(&tios, 0, sizeof(struct termios));/* C_ISPEED     Input baud (new interface)C_OSPEED     Output baud (new interface)*/switch (baud) {case 110:speed = B110;break;case 300:speed = B300;break;case 600:speed = B600;break;case 1200:speed = B1200;break;case 2400:speed = B2400;break;case 4800:speed = B4800;break;case 9600:speed = B9600;break;case 19200:speed = B19200;break;case 38400:speed = B38400;break;
#ifdef B57600case 57600:speed = B57600;break;
#endif
#ifdef B115200case 115200:speed = B115200;break;
#endif
#ifdef B230400case 230400:speed = B230400;break;
#endif
#ifdef B460800case 460800:speed = B460800;break;
#endif
#ifdef B500000case 500000:speed = B500000;break;
#endif
#ifdef B576000case 576000:speed = B576000;break;
#endif
#ifdef B921600case 921600:speed = B921600;break;
#endif
#ifdef B1000000case 1000000:speed = B1000000;break;
#endif
#ifdef B1152000case 1152000:speed = B1152000;break;
#endif
#ifdef B1500000case 1500000:speed = B1500000;break;
#endif
#ifdef B2500000case 2500000:speed = B2500000;break;
#endif
#ifdef B3000000case 3000000:speed = B3000000;break;
#endif
#ifdef B3500000case 3500000:speed = B3500000;break;
#endif
#ifdef B4000000case 4000000:speed = B4000000;break;
#endifdefault:speed = B9600;LOG_W("WARNING Unknown baud rate %d for %s (B9600 used)", baud, device);}/* Set the baud rate */if ((cfsetispeed(&tios, speed) < 0) ||(cfsetospeed(&tios, speed) < 0)) {close(s);s = -1;return -1;}/* C_CFLAG      Control optionsCLOCAL       Local line - do not change "owner" of portCREAD        Enable receiver*/tios.c_cflag |= (CREAD | CLOCAL);/* CSIZE, HUPCL, CRTSCTS (hardware flow control) *//* Set data bits (5, 6, 7, 8 bits)CSIZE        Bit mask for data bits*/tios.c_cflag &= ~CSIZE;switch (data_bit) {case 5:tios.c_cflag |= CS5;break;case 6:tios.c_cflag |= CS6;break;case 7:tios.c_cflag |= CS7;break;case 8:default:tios.c_cflag |= CS8;break;}/* Stop bit (1 or 2) */if (stop_bit == 1)tios.c_cflag &= ~CSTOPB;else /* 2 */tios.c_cflag |= CSTOPB;/* PARENB       Enable parity bitPARODD       Use odd parity instead of even */if (parity == 'N') {/* None */tios.c_cflag &= ~PARENB;} else if (parity == 'E') {/* Even */tios.c_cflag |= PARENB;tios.c_cflag &= ~PARODD;} else {/* Odd */tios.c_cflag |= PARENB;tios.c_cflag |= PARODD;}/* Read the man page of termios if you need more information. *//* This field isn't used on POSIX systemstios.c_line = 0;*//* C_LFLAG      Line optionsISIG Enable SIGINTR, SIGSUSP, SIGDSUSP, and SIGQUIT signalsICANON       Enable canonical input (else raw)XCASE        Map uppercase \lowercase (obsolete)ECHO Enable echoing of input charactersECHOE        Echo erase character as BS-SP-BSECHOK        Echo NL after kill characterECHONL       Echo NLNOFLSH       Disable flushing of input buffers afterinterrupt or quit charactersIEXTEN       Enable extended functionsECHOCTL      Echo control characters as ^char and delete as ~?ECHOPRT      Echo erased character as character erasedECHOKE       BS-SP-BS entire line on line killFLUSHO       Output being flushedPENDIN       Retype pending input at next read or input charTOSTOP       Send SIGTTOU for background outputCanonical input is line-oriented. Input characters are putinto a buffer which can be edited interactively by the useruntil a CR (carriage return) or LF (line feed) character isreceived.Raw input is unprocessed. Input characters are passedthrough exactly as they are received, when they arereceived. Generally you'll deselect the ICANON, ECHO,ECHOE, and ISIG options when using raw input*//* Raw input */tios.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);/* C_IFLAG      Input optionsConstant     DescriptionINPCK        Enable parity checkIGNPAR       Ignore parity errorsPARMRK       Mark parity errorsISTRIP       Strip parity bitsIXON Enable software flow control (outgoing)IXOFF        Enable software flow control (incoming)IXANY        Allow any character to start flow againIGNBRK       Ignore break conditionBRKINT       Send a SIGINT when a break condition is detectedINLCR        Map NL to CRIGNCR        Ignore CRICRNL        Map CR to NLIUCLC        Map uppercase to lowercaseIMAXBEL      Echo BEL on input line too long*/if (parity == 'N') {/* None */tios.c_iflag &= ~INPCK;} else {tios.c_iflag |= INPCK;}/* Software flow control is disabled */tios.c_iflag &= ~(IXON | IXOFF | IXANY);/* C_OFLAG      Output optionsOPOST        Postprocess output (not set = raw output)ONLCR        Map NL to CR-NLONCLR ant others needs OPOST to be enabled*//* Raw ouput */tios.c_oflag &= ~OPOST;/* C_CC         Control charactersVMIN         Minimum number of characters to readVTIME        Time to wait for data (tenths of seconds)UNIX serial interface drivers provide the ability tospecify character and packet timeouts. Two elements of thec_cc array are used for timeouts: VMIN and VTIME. Timeoutsare ignored in canonical input mode or when the NDELAYoption is set on the file via open or fcntl.VMIN specifies the minimum number of characters to read. Ifit is set to 0, then the VTIME value specifies the time towait for every character read. Note that this does not meanthat a read call for N bytes will wait for N characters tocome in. Rather, the timeout will apply to the firstcharacter and the read call will return the number ofcharacters immediately available (up to the number yourequest).If VMIN is non-zero, VTIME specifies the time to wait forthe first character read. If a character is read within thetime given, any read will block (wait) until all VMINcharacters are read. That is, once the first character isread, the serial interface driver expects to receive anentire packet of characters (VMIN bytes total). If nocharacter is read within the time allowed, then the call toread returns 0. This method allows you to tell the serialdriver you need exactly N bytes and any read call willreturn 0 or N bytes. However, the timeout only applies tothe first character read, so if for some reason the drivermisses one character inside the N byte packet then the readcall could block forever waiting for additional inputcharacters.VTIME specifies the amount of time to wait for incomingcharacters in tenths of seconds. If VTIME is set to 0 (thedefault), reads will block (wait) indefinitely unless theNDELAY option is set on the port with open or fcntl.*//* Unused because we use open with the NDELAY option */tios.c_cc[VMIN] = 0;tios.c_cc[VTIME] = 0;if (tcsetattr(s, TCSANOW, &tios) < 0) {close(s);s = -1;return -1;}/***************************/int portfd;#if (__GNUC__ == 4 && __GNUC_MINOR__ == 3)struct my_serial_rs485 rs485conf;struct my_serial_rs485 rs485conf_bak;
#elsestruct serial_rs485 rs485conf;//struct serial_rs485 rs485conf_bak;
#endif	//struct termios newtios,oldtios; /*termianal settings */portfd=s;
/*get serial port parnms,save away */// tcgetattr(portfd,&newtios);// memcpy(&oldtios,&newtios,sizeof newtios);// /* configure new values */// cfmakeraw(&newtios); /*see man page */// newtios.c_iflag |=IGNPAR; /*ignore parity on input */// newtios.c_oflag &= ~(OPOST | ONLCR | OLCUC | OCRNL | ONOCR | ONLRET | OFILL); // newtios.c_cflag = CS8 | CLOCAL | CREAD;// newtios.c_cc[VMIN]=1; /* block until 1 char received */// newtios.c_cc[VTIME]=0; /*no inter-character timer *//* 115200 bps */// cfsetospeed(&newtios,B9600);// cfsetispeed(&newtios,B9600);// /* register cleanup stuff */// atexit(reset_tty_atexit);// memset(&sa,0,sizeof sa);// sa.sa_handler = reset_tty_handler;// sigaction(SIGHUP,&sa,NULL);// sigaction(SIGINT,&sa,NULL);// sigaction(SIGPIPE,&sa,NULL);// sigaction(SIGTERM,&sa,NULL);// /*apply modified termios */// saved_portfd=portfd;// tcflush(portfd,TCIFLUSH);// tcsetattr(portfd,TCSADRAIN,&newtios);if (ioctl (portfd, TIOCGRS485, &rs485conf) < 0) {/* Error handling.*/ printf("ioctl TIOCGRS485 error.\n");}/* Enable RS485 mode: */rs485conf.flags |= SER_RS485_ENABLED;/* Set logical level for RTS pin equal to 1 when sending: */rs485conf.flags |= SER_RS485_RTS_ON_SEND;//rs485conf.flags |= SER_RS485_RTS_AFTER_SEND;/* set logical level for RTS pin equal to 0 after sending: */ rs485conf.flags &= ~(SER_RS485_RTS_AFTER_SEND);//rs485conf.flags &= ~(SER_RS485_RTS_ON_SEND);/* Set rts delay after send, if needed: */rs485conf.delay_rts_after_send = 0x80;if (ioctl (portfd, TIOCSRS485, &rs485conf) < 0){/* Error handling.*/ printf("ioctl TIOCSRS485 error.\n");}else{printf("rs485conf.flags 0x%x.\n", rs485conf.flags);printf("rs485conf.delay_rts_before_send 0x%x.\n", rs485conf.delay_rts_before_send);printf("rs485conf.delay_rts_after_send 0x%x.\n", rs485conf.delay_rts_after_send);}/****************************/return s;
}void serial_close(int s, struct termios *old_tios)
{if (s != -1) {tcsetattr(s, TCSANOW, old_tios);close(s);}
}int serial_send(int s, const uint8_t *buf, int length)
{return write(s, buf, length);
}int serial_receive(int s, uint8_t *buf, int bufsz, int timeout)
{int len = 0;int rc = 0;fd_set rset;struct timeval tv;while (bufsz > 0) {FD_ZERO(&rset);FD_SET(s, &rset);tv.tv_sec = timeout / 1000;tv.tv_usec = (timeout % 1000) * 1000;rc = select(s + 1, &rset, NULL, NULL, &tv);if (rc == -1) {if (errno == EINTR)continue;}if (rc <= 0) {break;}rc = read(s, buf + len, bufsz);if (rc <= 0) {break;}len += rc;bufsz -= rc;timeout = 20;}if (rc >= 0) {rc = len;}return rc;
}int serial_flush(int s)
{if (s != -1) {tcflush(s, TCIOFLUSH);}return 0;
}

五、编译验证

将修改后的代码进行交叉编译,并下载到开发板。
打开测试软件,启动程序。
软件通信日志部分:
在这里插入图片描述
开发板串口打印信息:
在这里插入图片描述
程序能能够通过rs485正常获取到modbus数据。

这篇关于nuc980开发板使用Agile Modbus软件包-基于 rs485 通讯的文章就介绍到这儿,希望我们推荐的文章对编程师们有所帮助!



http://www.chinasem.cn/article/540604

相关文章

Python通用唯一标识符模块uuid使用案例详解

《Python通用唯一标识符模块uuid使用案例详解》Pythonuuid模块用于生成128位全局唯一标识符,支持UUID1-5版本,适用于分布式系统、数据库主键等场景,需注意隐私、碰撞概率及存储优... 目录简介核心功能1. UUID版本2. UUID属性3. 命名空间使用场景1. 生成唯一标识符2. 数

SpringBoot中如何使用Assert进行断言校验

《SpringBoot中如何使用Assert进行断言校验》Java提供了内置的assert机制,而Spring框架也提供了更强大的Assert工具类来帮助开发者进行参数校验和状态检查,下... 目录前言一、Java 原生assert简介1.1 使用方式1.2 示例代码1.3 优缺点分析二、Spring Fr

Android kotlin中 Channel 和 Flow 的区别和选择使用场景分析

《Androidkotlin中Channel和Flow的区别和选择使用场景分析》Kotlin协程中,Flow是冷数据流,按需触发,适合响应式数据处理;Channel是热数据流,持续发送,支持... 目录一、基本概念界定FlowChannel二、核心特性对比数据生产触发条件生产与消费的关系背压处理机制生命周期

java使用protobuf-maven-plugin的插件编译proto文件详解

《java使用protobuf-maven-plugin的插件编译proto文件详解》:本文主要介绍java使用protobuf-maven-plugin的插件编译proto文件,具有很好的参考价... 目录protobuf文件作为数据传输和存储的协议主要介绍在Java使用maven编译proto文件的插件

SpringBoot线程池配置使用示例详解

《SpringBoot线程池配置使用示例详解》SpringBoot集成@Async注解,支持线程池参数配置(核心数、队列容量、拒绝策略等)及生命周期管理,结合监控与任务装饰器,提升异步处理效率与系统... 目录一、核心特性二、添加依赖三、参数详解四、配置线程池五、应用实践代码说明拒绝策略(Rejected

C++ Log4cpp跨平台日志库的使用小结

《C++Log4cpp跨平台日志库的使用小结》Log4cpp是c++类库,本文详细介绍了C++日志库log4cpp的使用方法,及设置日志输出格式和优先级,具有一定的参考价值,感兴趣的可以了解一下... 目录一、介绍1. log4cpp的日志方式2.设置日志输出的格式3. 设置日志的输出优先级二、Window

Ubuntu如何分配​​未使用的空间

《Ubuntu如何分配​​未使用的空间》Ubuntu磁盘空间不足,实际未分配空间8.2G因LVM卷组名称格式差异(双破折号误写)导致无法扩展,确认正确卷组名后,使用lvextend和resize2fs... 目录1:原因2:操作3:报错5:解决问题:确认卷组名称​6:再次操作7:验证扩展是否成功8:问题已解

Qt使用QSqlDatabase连接MySQL实现增删改查功能

《Qt使用QSqlDatabase连接MySQL实现增删改查功能》这篇文章主要为大家详细介绍了Qt如何使用QSqlDatabase连接MySQL实现增删改查功能,文中的示例代码讲解详细,感兴趣的小伙伴... 目录一、创建数据表二、连接mysql数据库三、封装成一个完整的轻量级 ORM 风格类3.1 表结构

使用Docker构建Python Flask程序的详细教程

《使用Docker构建PythonFlask程序的详细教程》在当今的软件开发领域,容器化技术正变得越来越流行,而Docker无疑是其中的佼佼者,本文我们就来聊聊如何使用Docker构建一个简单的Py... 目录引言一、准备工作二、创建 Flask 应用程序三、创建 dockerfile四、构建 Docker

Python使用vllm处理多模态数据的预处理技巧

《Python使用vllm处理多模态数据的预处理技巧》本文深入探讨了在Python环境下使用vLLM处理多模态数据的预处理技巧,我们将从基础概念出发,详细讲解文本、图像、音频等多模态数据的预处理方法,... 目录1. 背景介绍1.1 目的和范围1.2 预期读者1.3 文档结构概述1.4 术语表1.4.1 核