A rookie, to borrow a 51 single chip microcomputer with friends, suddenly out of order, dk light speed, and constantly MMMM buzz!
Because it is a novice, so there is no too many scores dedicated to the great god! Hope is burke!

CodePudding user response:

May be development board jump line wrong

CodePudding user response:

I also is not big, but this kind of problem I have ever seen, this is generally not reset or not normal to program MCU (probably write program didn't burn or power supply is not enough to make SCM can't normal boot),
If development board did not appear short circuit, the problem that power supply and power supply is sufficient, the burning process of process is likely to go wrong, recommends burning or change the burning device (burning device directly connect the computer USB as far as possible, don't answer the extension cord or USB hub, change a USB interface may also be useful) or in piece of single-chip computer (not in development board) a try,

CodePudding user response:

The first discharge software problems, 51 microcontroller hardware problem is bad to find, there is a problem just look at the schematic buzzer and LED the pin connecting MCU, change the program again to look at,