修改一下几次配置（我的TFT芯片是ST7735所有使用这个）：// Tell the library to use 8 bit parallel mode (otherwise SPI is assumed)//#define TFT_PARALLEL_8_BIT// Display type - only define if RPi display//#define RPI_DISPLAY_TYPE // 20MHz maximum SPI// Only define one driver, the other...
SPI.beginTransaction(SPISettings(speedMaximum,dataOrder,dataMode)) speedMaximum是时钟, dataOrder(MSBFIRST或LSBFIRST), dataMode(SPI_MODE0,SPI_MODE1,SPI_MODE2或SPI_MODE3)。 SPI中有四种操作模式,如下所示: 模式0(默认值) - 时钟通常为低电平(CPOL = 0),数据在从低电平到高电平(前沿)(CPHA = 0)...
If any of your settings are variables, you may create a SPISettings object to hold the 3 settings. Then you can give the object name to SPI.beginTransaction(). Creating a named SPISettings object may be more efficient when your settings are not constants, especially if the maximum speed is...
It’s the maximum PWM setting for your output. Normally, the heating resistor is selected, that a maximum value of 255 is allowed, meaning the full voltage (normally 12V) is send to the resistor. The lost energy at the resistor is U2/R. If you increase your voltage above the designed ...
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For example, the minimum value of a square wave is 0, the maximum value is 1, and the duration of each value is 1 second. The square wave is shown in the figure below. A square wave also has a specific frequency, which specifies the number of cycles the square wave has in one seco...
// control the counting sequence of the counter, the source for maximum // (TOP) counter value, and what type of waveform generation to be used // Modes of operation supported by the Timer/Counter unit are: // - Normal mode (counter), ...
If you need to, for example, store multiple strings in an array, you can create an array with multiple char arrays stored within it: char* multichar[4]; char name1[5] = {'j', 'o', 's', 'h',0}; char name2[5] ={'t', 'o', 'd', 'd',0}; or char * multichar[] ...
char array2[]="hello, world! "; //the string to print on the LCD int tim = 500; //the value of delay time // initialize the library with the numbers of the interface pins LiquidCrystal_I2C lcd(0x27,16,2); // set the LCD address to 0x27 0x3F for a 16 chars and 2 line dis...
if we want to get the first value of the array, we use array[0] The zero between square brackets is called theindex. Arrays arezero-based, this means that the first element in the array has index zero. This can be confusing at first, for example, array[5] will return 6, where you...