C51 MCU pulse accumulator C language program 200

If the timer count value is not enough, you can first set the sum number of 1, such as 1ms, and then add another number to 10 to 100ms to get the 1s time.

I don't know C language, if you want to assemble, I can give it to you, 1 second = 1000 milliseconds = 1000000us, put it in the specific implementation, you can use the query method, you can also use the interrupt mode, let the crystal oscillator frequency be 6m hertz, then the machine cycle is 12 6m = 2us, the interrupt is simpler, I say the interrupt program, t0 (the pin works in the timing mode, the timing is set to 100ms, use the interrupt, the control interrupt number is 10 overflows, a total of 1000ms, Then t1 (pin count plus one, the specific calculation is as follows:

T0 adopts method 1, the initial value of counting x=2 16-(100*10 3 2)=10000h-c350h=3cb0h

T1 adopts counting method 1, which is a 16-bit counting method and can count a large number of bits.

Write the program yourself and give it to me.

To set the 16-bit timing reader t0 or t1, the working mode, the maximum count value is 65536=0xffffh, that is, the initial value of the count th0(th1)=ffh, tl0=ffh is loaded into the high and low bits respectively, which can be set as an interrupt function, and the interrupt will be automatically triggered when the count overflows, and it can be called when the program is running

Keyboard settings are everywhere, just search for them.

The single-chip microcomputer outputs 50 rectangular pulses This is the program source code for 50 pulses. . .

Is it Fang Bo? How much does the cycle cost? Please be more detailed.

You all know it's easy, why not do it yourself?

To give you an idea: first figure out the pulse frequency.

You can capture the time when the pulse goes from high to low, and then you can capture the time when the low level changes to the high level, and the time required in between is a high time t, and the frequency is 1 2t

Seriously agree with the opinion upstairs that the interrupt is used to do pulse counting, which is safe and reliable, and the pulse will not be lost. The processing of the four keys can be placed in front of the program, and after reading the state, the corresponding start, stop and other subroutines can be called.

What kind of single-chip microcomputer do you use, this is too easy to get, you can do it with only a single-chip microcomputer, you want to interrupt the way to count, the falling edge triggers the interrupt, the input of the sensor control interrupt port, you can get it, a small part of my project is the switch pulse counting. The program will not be given to you, and if you don't understand the design patent, you can still ask.

You don't need a counter, you can do it with a single-chip microcomputer.

Give pins 1, 0 and 0 to pulse ,,, time is determined by demand.

The single-chip microcomputer outputs 50 rectangular pulses This is the program source code for 50 pulses. . .

Hello! Is it okay to output pulses from any port?