下面的代码将在计数器值通过0xAF时生成一个'TIMER0_COMPA'中断。 // Timer0 is already used for millis() - we'll just interrupt somewhere // in the middle and call the "Compare A" function below OCR0A = 0xAF; TIMSK0 |= _BV(OCIE0A); 我们将为定时器中断向量定义一个中断处理程序,称为“...
pinMode(pins[i], OUTPUT); // 设置每个指针作为输出。 } void loop() { int i; for (i = 0; i < num_pins; i++){ // 扫描通过每个引脚… digitalWrite(pins[i], HIGH); // 置为高电平 (打开) delay(timer); // 延时 digitalWrite(pins[i], LOW); // 置为低电平 (关闭) for (i =...
inttimer=100;// The higher the number, the slower the timing.intledPins[]={2,7,4,6,5,3};// an array of pin numbers to which LEDs are attachedintpinCount=6;// the number of pins (i.e. the length of the array)voidsetup(){// the array elements are numbered from 0 to (pinC...
The PWM outputs generated on pins 5 and 6 will have higher-than-expected duty cycles. This is because of interactions with the millis() and delay() functions, which share the same internal timer used to generate those PWM outputs. This will be noticed mostly on low duty-cycle settings (e...
pinMode(A4, OUTPUT); } 这个Arduino倒计时器的工作原理很简单,但代码有点复杂。 最初,它会在LCD显示屏上打印输出“Arduino Timer”,直到您按下按钮。只要按下按钮,它会通过调用“setFeedingTime”函数来要求输入倒计时时间。然后你可以通过使用键盘输入持续时间。然后你需要按'D'来保存时间并开始倒计时。在void ...
Returns the specified pins to high-impedance output and closes the device. 函数使用 这里我们需要用到的是gpio gpio_open(int pin),void gpio_set_direction(gpio device, int direction),void gpio_write(gpio device, unsigned int value),unsigned int gpio_read(gpio device) ...
Starting with the 3.1 version, the generation of PWM for sending is done by software, thus saving the hardware timer and enabling arbitrary output pins for sending. If you use an (old) Arduino core that does not use the -flto flag for compile, you can activate the line #define SUPPRESS_...
port_to_output_PGM digital_pin_to_timer_PGM digital_pin_to_bit_mask_PGM digital_pin_to_port_PGM port_to_input_PGM pins_arduino.h里面有这些函数的定义,所以应该是改pins_arduino这个文件。搜索arduino里面的文件的时候发现每个板子有自己的一个文件夹,下面有一个对应的这个文件。
} void outputPort(byte portNumber, byte portValue, byte forceSend) { // pins not configured as INPUT are cleared to zeros portValue = portValue & portConfigInputs[portNumber]; // only send if the value is different than previously sent if (forceSend || previousPINs[portNumber] != port...
Next set the LED pin as OUTPUT pin and the Push buttons are set as INPUT pins pinMode(ledPin, OUTPUT); pinMode(2,INPUT); pinMode(4,INPUT); Next disable all the interrupts: noInterrupts(); Next the Timer1 is initialized. TCCR1A = 0; TCCR1B = 0; The preloader timer value is set...