SD.exists("example.txt"); //返回true或false 1. 删除文件 SD.remove("example.txt"); 1.
import serial import time ser = serial.Serial('/dev/ttyAMA0', 115200) #打开串口设备 if ser.isOpen == False: ser.open() # 打开串口 a=ser.write(b"x09") print(a) try: while True: size = ser.inWaiting() # 获得缓冲区字符 if size != 0: res = ser.read(size) # 读取内容并显示 ...
* Example: * Say you are forced to run your test suite on an embedded processor with no * `stdout` option. You decide to route your test result output to a custom * serial `RS232_putc()` function you wrote like thus: *//* #define UNITY_OUTPUT_CHAR(a) RS232_putc(a) *//* #d...
person; unsigned int flag: 1; } ExampleStruct; 若改成如下形式,不仅可节省1字节空间,可读性也变好了。 typedef struct ExampleStruct { unsigned int valid: 1; unsigned int flag: 1; PersonInformation person; } ExampleStruct; 结构体的设计要尽量考虑向前兼容和以后的版本升级,并为某些未来可能的...
/*Multiple Serial testReceives from the main serial port, sends to the others.Receives from serial port 1, sends to the main serial (Serial 0).This example works only with boards with more than one serial like Arduino Mega, Due, Zero etc.The circuit:- any serial device attached to Serial...
SPI(Serial Peripheral Interface)协议是一种串行外设接口协议,是一种全双工、同步的接口技术,通常用于连接微控制器和外设,例如传感器、存储器、显示器等。SPI协议传输效率高,使用简单,开销较小,因此被广泛应用于嵌入式系统中。 SPI协议使用主从模式,主设备可以控制多个从设备,从设备不能主动向主设备发送数据或信息。SP...
(HAL_SPI_Transmit(spi_dev->spix,(uint8_t*)write_buf,write_size,1000)!=HAL_OK){result=SFUD_ERR_WRITE;}}else{if(HAL_SPI_Receive(spi_dev->spix,(uint8_t*)read_buf,read_size,1000)!=HAL_OK){result=SFUD_ERR_READ;}}/* For simplicity reasons, this example is just waiting till the ...
//Remark: Hardware register correspond to period count-1. Example ARR register value 9 means period of 10 timer cycle switch(format) { caseMICROSEC_FORMAT: period_cyc = overflow * (getTimerClkFreq() /1000000); Prescalerfactor = (period_cyc /0x10000) +1; ...
SPI(Serial Peripheral Interface)协议是一种串行外设接口协议,是一种全双工、同步的接口技术,通常用于连接微控制器和外设,例如传感器、存储器、显示器等。SPI协议传输效率高,使用简单,开销较小,因此被广泛应用于嵌入式系统中。 SPI协议使用主从模式,主设备可以控制多个从设备,从设备不能主动向主设备发送数据或信息。SP...
Serial.println("EEPROM is empty, writing WRITTEN_SIGNATURE and some example data:"); EEPROM.put(storedAddress, WRITTEN_SIGNATURE); //...in this case we ask for user data. Serial.setTimeout(30000); Serial.print("Insert your name :"); ...