pin:你要进行脉冲计时的引脚号(int)。 value:要读取的脉冲类型,HIGH或LOW(int)。 timeout (可选):指定脉冲计数的等待时间,单位为微秒,默认值是1秒(unsigned long) 返回 脉冲长度(微秒),如果等待超时返回0(unsigned long) 例子 int pin = 7; unsigned long duration; void setup() { pinMode(pin,INPUT); ...
void drawRoundRect(uint16_t x0, uint16_t y0, uint16_t w, uint16_t h, uint16_t radius, uint16_t color); void fillRoundRect(uint16_t x0, uint16_t y0, uint16_t w, uint16_t h, uint16_t radius, uint16_t color);
input(echo)==1: pulse_end = time.time() pulse_duration = pulse_end - pulse_start # Calculate the distance in centimeters distance = pulse_duration * 17150 distance = round(distance, 2) # Display the results. end = '\r' forces the output to the same line print("Distance: " + str(...
duration = pulseIn(5, HIGH); // Detect pulse length from the Echo pin, measured in microseconds cm = (duration/2)/29.155; // Divide duration in half (due to round trip), then convert distance to centimeters (1cm per 29.155 microseconds), assign to cm variable 这部分的操作是在Trig引脚上...
void drawRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t c); void fillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t c); void drawRoundRect(int16_t x, int16_t y, int16_t w, int16_t h, int16_t radius, uint16_t color); void fil...
tft.drawRoundRect函数用于创建一个填充的矩形。tft.drawRoundRect函数的语法如下: tft.drawRoundRect(int16_t x0, int16_t y0, int16_t w, int16_t h, int16_t radius, uint16_t color) 1. 在这里: x0 =矩形起点的X坐标 y0 =矩形起点的Y坐标 ...
w是宽度，h是高度，t是rextangle的颜色drawRoundRect(int32_t x0, int32_t y0, int32_t w, int32_t h, int32_t radius, uint32_t color),绘制一个圆角矩形，在x和y位置具有r半径圆角，w宽度和h高度和t颜色fillRoundRect(int32_t x0, int32_t y0, int32_t w, int32_t h, int32_t radi...
/ TIME_FACTOR; // Time smoothing coefficients (used to factor in previous data) const float anti_coeff = (TIME_FACTOR - 1.) / TIME_FACTOR; const unsigned int sampling_period_us = round(1000000 * (2.0 / SAMPLING_FREQUENCY)); // Sampling period (doubled to account for overclock) int8...
19.19 round() 19.20 signbit() 19.21 sq() 19.22 square() 19.23 trunc() 二十、三角函数 20.1 sin() 20.2 cos() 20.3 tan() 20.4 acos() 20.5 asin() 20.6 atan() 20.7 atan2() 20.8 cosh() 20.9 degrees() 20.10 hypot() 20.11 radians() ...
display.fillRoundRect(0, 0, 128, 32, 5, WHITE); display.display(); delay(2000); /*---显示英文 数字---*/ display.clearDisplay(); // clears the screen and buffer display.setTextSize(1); //选择字号 display.setTextColor(WHITE); //字体颜色 display.setCursor(0...