Both passive chip LED and buzzer driver

How to achieve a 51 single lit lamp 1 second while allowing passive buzzer sound 1 second, 1 second off the time buzzer goes off 1 second. Then a light-emitting diode P1.0, P2.0 connected passive bu

Infrared remote control MCU program

Question in the comments section. Interrupt trigger level with the bottom IT0 = 1 how not to write it? Please help us to see. There can not talk about in the infrared receiver decoding process, the

Digital thermometer with a single chip design

There are several requirements 1. The basic range of -50 -110 ; 2. Precision error of less than 0.5 ; 3.LED direct reading digital display; 4. Can be set lower limit temperature alarm on the not

Produced by ALTERA MAX

An expert, what is the ALTERA company's MAXII how many processors ah, there is his clock frequency (of the ARM9) make access controllers, ARM9ALTERA the MAX will perform better? ? ? ? ? ? ? ? ? is

Problems at compile time

In the compilation is complete, the program that is not wrong, but this warning appears, hex file can not be generated! How to solve this? error message in fact said very clearly: CodeSizeLimitInRe

SCM: Find the initial value of timer * counter.

MCU clock frequency bit 12MHz, setting work in the way of counter 0 * 0, regular time 1ms, timer * Calculate the initial value of the counter, that IH0 =?, TL0 =?. Note: work is a 16-bit 1 counter.

Microcontroller Programming

I made a complete set RF card attendance to lack of a main program can not come, the other routines including communication voice reader, so there is routine and initialization of the main program t

Urgent!!! To write a graduation project. Microcontroller-based temperature measurement system design who ah?

I was doing the design based on single chip temperature detection system, and who ah, who uploaded the copies grateful . is very simple, first, hardware design, the sensors detect analog signals thr

51 microcontroller instruction MOVA, R0 is a pointer to pass it?

I saw it in the book instruction, MOVA.R0, the book is that the pointer annotations to the ACC in passing, MOVA, @ R0 This instruction is the instruction pointer Ah, the book is not on the @, why is

AD conversion

From the AD converter to read out how to convert binary voltage value? if the AD converter output data of the N bits, then: AD converter voltage = (AD reference voltage N-th power * 2) * AD convers

Or microcontroller problem

1, is known (30H) = 40H, (40H) = 10H, (10H) = 00H, P1 = CAH, please write the following block after the contents of the relevant unit. MOVR0, # 30HMOVA, @ R0MOVR1, AMOVB, @ R1MOV @ R1, P1MOVA, @ R0

Microcontroller question

Read the following procedure, indicating its function. MOVR0, # 30HMOVA, @ R0RLAMOVR1, ARLARLAADDA, R1MOV @ R0, AMOVR0, # 30H; to the R0 register assignment 30HMOVA, @ R0; take Address 30H of data

Simple questions on the MCU

Why is always the internal operation of the microcontroller data from this place to another place and move to another place so what does this mean? microcontroller instruction is limited to use, so