1.1 性能资源 Arduino UNO R3是一款基于Atmega328的单片机开发板,其板载14个数字IO端口0到13(其中6个端口可以作为PWM信号输出功能使用);6个模拟输入(可做数字信号输入和输出功能)端口A0~A5;1个16MHz的晶体振荡器;一个USB接口;1个DC电源插座;1个ICSP header以及1个复位按钮。Arduino UNO R3的详细参数如下表中所示...
“reader”对象稍后将用于访问图像加载函数。然后…我们按照通常的方式声明一个显示对象(大多数例子中称为“tft”)…例如Arduino的2.8英寸tft触屏为:#define SD_CS 4 // SD card select pin #define TFT_CS 10 // TFT select pin #define TFT_DC 9 // TFT display/command pin Adafruit_ILI9341 tft = ...
MW150R是水星的一款低端家用路由,在京东上卖48元,现在的版本是V10.1,与最早的版本相比,Flash和内存及供电部分基本都已经简化到最简了。现在的配置是1MB SPI Flash、8MB DDR内存、5V供电,AR9331的USB没有引出来(MW150R3G有USB接口)。 由于Arduino已经有现成的TF/SD读卡方案,因此我个人觉得没必要再增加USB转TF或SD...
初始化一个方法或另一个方法的代码略有不同,这些示例将检查USE_SD_CARD是被#定义来选择一个方法还是选择另一个方法。如果您知道您自己的项目只需要在一种或另一种类型上运行,那么您实际上只需要相应的初始化 使用SD卡时,声明以下两个全局变量: SdFat SD; // SD card filesystem Adafruit_ImageReader reader(S...
The Leonardo ETH differs from the preceding Ethernet board in that the ATmega32u4 has built﹏ USB communication, eliminating the need for an external USB o〆rial converter. This allows the Leonardo ETH to appear to a connected computer as a mouse and keyboard, in addition to a virtual (CDC...
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USB port only } Serial.print("Initializing SD card..."); // see if the card is present and can be initialized: if (!SD.begin()) { Serial.println("Card failed, or not present"); // don't do anything more: while (1); } Serial.println("card initialized."); // open the file...