I2c.setSpeed(fast) Description: Enables high speed mode (400kHz) Parameters: fast -Boolean True: High Speed False: Low Speed Returns: none I2c.pullup(activate) Description: Enables/disables internal pullup resi
i2c_cmd_handle_t i2c_cmd = i2c_cmd_link_create();//创建IIC命令链表 i2c_master_start(i2c_cmd);//IIC开始信号发送 i2c_master_write_byte(i2c_cmd, (PCA9685_IIC_ADDR << 1) | I2C_MASTER_READ, true);//IIC写入地址和写入模式 i2c_master_read_byte(i2c_cmd, &read_data, true);//IIC读取...
display.setTextColor(SSD1306_WHITE); if(gps.location.isValid()==1) { //Stringgps_speed=String(gps.speed.kmph()); display.setCursor(0,0); display.setTextSize(3); display.print(gps.speed.kmph()); display.setCursor(75,20); display.setTextSize(2); display.print("km/h"); display.set...
#include"SoftI2C.h"staticvoidsetSdaMode_OUT(SoftI2C_HandleTypeDef *SoftI2C_s_ptr);staticvoidsetSclMode_OUT(SoftI2C_HandleTypeDef *SoftI2C_s_ptr);staticvoidsetSdaMode_IN(SoftI2C_HandleTypeDef *SoftI2C_s_ptr);staticvoidsetSdaLevel(SoftI2C_HandleTypeDef *SoftI2C_s_ptr,uint8_tlevel);staticvoidset...
在单片机中使用I2C通信协议的时候, 需要编写程序去模拟I2C总线的通信, 对于I2C通信协议需要补充的一点是: 在实际通信传输数据时, SCL总线拉高的时间只要大于1.5μs都能够正常传输数据. 这块128x64 OLED的裸屏是由SSD1306驱动的. 该芯片专为共阴极 OLED 面板设计, SSD1306 中嵌入了对比度控制器, 显示 RAM 和晶振...
OLED显示屏是I2C总线,其VCC、GND引脚要连接到Arduino开发板的3.3V、GND引脚。同样,SDA、SCL引脚则连接到Arduino板子的A4、A5引脚上。 编写代码 L80 GPS模块支持Tiny GPS++ Library,下载库文件并上传到Arduino库文件夹。除了Tiny GPS++ Library,代码还需要称作Adafruit SSD1306的SSD1306 Library文件。
if (gps.speed.isValid()) { display.setTextSize(2); display.setCursor(40, 40); display.print(gps.speed.kmph()); 显示.显示(); } 最后,在 Arduino Uno 中上传代码并将系统放在移动的车辆中,您可以在 OLED 显示屏上看到速度,如下图所示。
I2C Modes & Communication Speeds Originally, the I2C-bus was limited to 100 kbit/s operations. Over time there have been several additions to the specification so that there are now five operating speed categories. Standard-mode, Fast-mode (Fm), Fast-mode Plus (Fm+), and High-speed mode ...
particleSensor.begin(Wire, I2C_SPEED_FAST); //Use default I2C port, 400kHz speed particleSensor.setup(); //Configure sensor with default settings particleSensor.setPulseAmplitudeRed(0x0A); //Turn Red LED to low to indicate sensor is running } void loop() { long irValue = particleSensor....
(7.0/8) #define _CT -1 //change tone #define _SPD -2 //set speed #define _RSPD -3 //reset speed to default #define _CHPTR -4 //charpter int _f1 =_D; int _f2 =(_f1*r*r); int _f3 =(_f2*r*r); int _f4 =(_f3*r); int _f5 =(_f4*r*r); int _f6 =(_f5*r*...