I2C与SPI相比,I2C只有两根线,SPI使用四根线,I2C可以有多个主从,而SPI只能有一个主和多个从。因此,在一个项目中有多个微控制器需要成为主控,然后使用 I2C。I2C通信一般用于与陀螺仪、加速度计、气压传感器、LED显示屏等进行通信。 在这个Arduino I2C 教程中,我们将使用两个 arduino 板之间的 I2C 通信,并使用电位...
{ display.begin(SSD1306_SWITCHCAPVCC, 0x3C);// here the 0x3c is the I2C address, check your i2c address if u have multiple devices. display.clearDisplay(); delay(2000); } voidloop() { display.drawBitmap(0, 0, myBitmap, 128, 64, WHITE); display.display(); } 烧录到 Arduino 上...
* selecting a chip then transferring data * + If there are multiple spi_device children, the i/o queue * arbitration algorithm is unspecified (round robin, fifo, * priority, reservations, preemption, etc) * * + Chipselect stays active during the entire message * (unless modified by spi_tra...
//#define TFT_D4 17 //#define TFT_D5 16 //#define TFT_D6 27 //#define TFT_D7 14 // ### EDIT THE PINs BELOW TO SUIT YOUR STM32 SPI TFT SETUP ### // The TFT can be connected to SPI port 1 or 2 //#define TFT_SPI_PORT 1 // SPI port 1 maximum clock rate is 55MHz...
配置SPI速率和SPI类型(如果不确定就使用默认,然后根据需要更改) 这是基于我的硬件的配置文件 // USER DEFINED SETTINGS// Set driver type, fonts to be loaded, pins used and SPI control method etc/// See the User_Setup_Select.h file if you wish to be able to define multiple// setups and the...
SPI外部IO扩展函数,通常使用带SPI接口的74HC595做8个IO扩展,把资料传给用来延伸数位输出的暂存器,此函式通常使用在延伸数位的输出。函式使用一个脚位表示资料、一个脚位表示时脉。dataPin为数据口,clockPin为时钟口,bitOrder用来表示位元间移动的方式,为数据传输方向(MSBFIRST高位在前,LSBFIRST低位在前),value会以...
(38400 chosen because it works as well at 8MHz as it does at 16MHz, but // it's really up to you depending on your project) Serial.begin(38400); // initialize device Serial.println("Initializing I2C devices..."); accelgyro.initialize(); // verify connection Serial.println("Testing ...
GPIO devices allow for one or multiple pins to be read and written directly. All of these functions are in gpio.h gpio type A handle to one or more pins which can be set simultaneously. gpio gpio_open(int pin) Returns a new handle to a GPIO device for a specific pin on the I/O ...
If it does not show up - enterhttps://siliconlabs.github.io/arduino/package_arduinosilabs_index.jsonin the'Additional Boards Manager URLs'field (add a comma in between if you have multiple URLs) Install theSilicon Labsplatform Getting started ...