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目前想做一个项目,用32去驱动设备,设备是24V,485,但是单片机是5v的,那么他们信号线可否通过max485或者说ttl转485直接连?还是需要什么其他元器件
一台3525 315逆变焊机电流最大不可调,分流器,反馈线路都差了没问题,数显表跟随电位器变化,给定电路器件查了没问题, 3140的2脚对地电阻100欧没问题,上电测3140的6脚电压焊接前后均为0v,没变化,换了3140还是一样,反馈电路周围器件都查了没找出问题,大师们帮忙分析分析
【前三名回答额外获得100IC币】创维电视绿灯不开机,极有可能是1117-18问题。手头没有。输入4.2V,输出1.8V,电流约250mA.7130串二极管电流不够,
我就想测测GPIO能不能读取高电平嘛,就把开发板上的5V电压连接到PH10,用的是浮空输入,结果PH10读取的还是低电平,百思不得其解,各位老哥帮帮忙。 代码很简单: #include "sys.h" #include "delay.h" #include "usart.h" int main(void) { GPIO_InitTypeDef GPIO_Initure; Cache_Enable(); HAL_Init(); Stm32_Clock_Init(4322529); delay_init(216); uart_init(115200); __HAL_RCC_GPIOH_CLK_ENABLE(); __HAL_RCC_GPIOA_CLK_ENABLE(); __HAL_RCC_GPIOE_CLK_ENABLE(); GPIO_Initure.Pin=GPIO_PIN_10; GPIO_Initure.Mode=GPIO_MODE_INPUT; GPIO_Initure.Pull=GPIO_NOPULL; GPIO_Initure.Speed=GPIO_SPEED_HIGH; HAL_GPIO_Init(GPIOH&GPIO_Initure); while(1) {int c=1; printf("%d "HAL_GPIO_ReadPin(GPIOH10)); if (HAL_GPIO_ReadPin(GPIOH10)==1) { printf("%d \n"c); } delay_ms(700); } }
请问 如何把 html 文件转为 .h文件的形式? 如下所示,我见有些例程是这样的形式,但不知道用什么工具转换,请告知 #ifndef __WEBPAGE_H #define __WEBPAGE_H #define INDEX_HTML "<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.0 Transitional//EN' 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\'>"\ "<html>"\ "<head>"\ "<title>W5500EVB - HTTP SERVER</title>"\ "<style type='text/css'>"\ "body {text-align:left; background-color:/*#ffc1e0*/#c0deed;font-family:Verdana;}"\ "#main {margin-right:auto;margin-left:auto;margin-top:30px;}"\ "label{display:inline-block;width:150px;}"\ "#main h3{color:#66b3ff; text-decoration:underline;}"\ "</style>"\ "<script>"\ "function $(id) { return document.getElementById(id); };"\ "function settingsCallback(o) {"\ "if ($('txtVer')) $('txtVer').value = o.ver;"\ "if ($('txtMac')) $('txtMac').value = o.mac;"\ "if ($('txtIp')) $('txtIp').value = o.ip;"\ "if ($('txtSub')) $('txtSub').value = o.sub;"\ "if ($('txtGw')) $('txtGw').value = o.gw;"\ "};"\ "</script>"\ "</head>"\ "<body>"\ "<div id='main'>"\ "<div style='background:snow; display:block;padding:10px 20px;'>"\ "<h3>Device Settings</h3>"\ "<form id='frmSetting' method='POST' action='config.cgi'>"\ "<p><label for='txtIp'>Firmware version:</label><input type='text' id='txtVer' name='ver' size='16' disabled='disabled' /></p>"\ "<p><label for='txtIp'>MAC address:</label><input type='text' id='txtMac' name='mac' size='16' disabled='disabled' /></p>"\ "<p><label for='txtIp'>IP address:</label><input type='text' id='txtIp' name='ip' size='16' /></p>"\ "<p><label for='txtSub'>Subnet mask:</label><input type='text' id='txtSub' name='sub' size='16' /></p>"\ "<p><label for='txtGw'>Default gateway:</label><input type='text' id='txtGw' name='gw' size='16' /></p>"\ "<p><input type='submit' value='Save Settings and Reboot' /></p>"\ "</form>"\ "</div>"\ "</div>"\ "<div style='margin:5px 5px;'>"\ "©Copyright 1998-2013 by WIZnet Team"\ "</div>"\ "<script type='text/javascript' src='w5500.js'></script>"\ "</body>"\ "</html>" #endif 复制代码