创建文件i2c-lcd.h: #include "stm32f4xx_hal.h" void lcd_init (void); // initialize lcd void lcd_send_cmd (char cmd); // send command to the lcd void lcd_send_data (char data); // send data to the lcd void lcd_send_string (char *str); // send string to the lcd void lcd...
esp32 i2s lcd 一、基本概念及特性 IIC时钟信号由主机提供,属于同步通信协议 一般硬件设计时需要对I2C SDA和SCLK均加上拉,此时保持总线空闲态为全高。 因为接收和发送共用一根数据线,所以I2C是半双工网络 其传输速度最大值为1Mbps,可以配置为400Kbps、100Kbps(标准传输速度) 因为是半双工,所以整个读写过程一般是...
SEC 0 //夏令时偏移量 LiquidCrystal_I2C LCD=LiquidCrystal_I2C(0x27,16,2); //构造LCD对象,参数:(地址,LCD列数,行数) /** * @description: 连接WiFi等待时,LCD显示符号闪烁功能 * @return {*} */ void spinner() { static int8_t counter = 0; const char* glyphs = "\xa1\xa5\xdb"; LCD...
在控制一台I2C设备之前,我们首先必须找出其十六进制地址。 因此,我们的第一个示例是I2C HEX地址扫描器。 找到I2C LCD显示器的十六进制地址后,我们将相应地控制该显示器,以通过I2C从Arduino或NodeMCU向LCD显示器发送消息。 下图显示了I2C LCD显示屏分别与Arduino Uno和NodeMCU之间的硬件连接。 下表列出了Arduino Uno和...
LCD都需要背光,而OLED不需要,因为它是自发光的。另外,OLED的功耗比LCD低得多,相同显示面积的功耗仅相当于LCD的1/3。OLED尺寸难以大型化,但是分辨率确可以做到很高,非常适合手持式移动设备。 这里用0.96 168x64常见的1.3寸OLED显示屏分为SPI和I2C两种通信方式,白色、蓝色、黄蓝双色三种颜色。 购买7pin,可以学习iic...
LCD Related Functions In order to initialise the LCD, we need to send some set of commands. The i2c-lcd library contains these commands and the functions which send these commands and data to the LCD. In order to send the command or data to the LCD, we need to follow some set of ste...
或者4行每行20个字符。有带和不带I2C模块的LCD显示屏。我建议使用I2C的模块，因为与电路板的连接非常...
I've put together a simple library for I2C LCD displays using the HD44780 driver to perform most of the basic tasks that might be useful for simple projects. I'm posting mainly because these displays are frequently used in small embedded projects and hopefully this can be of some help to ...
I2C interface: The ESP32-S3 provides multi-channel hardware I2C, currently using GPIO6 (SDA) and GPIO7 (SCL) pins for the I2C bus. The QMI8658 six-axis inertial measurement unit and LCD touch control chip are mounted on the board. For details, please refer toSchematic ...