Waveforms in 8051 Microcontroller Square Wave To create a square wave generation using Delay. let us say we want to construct a 1khz square waveform the processor instruction cycle of 8051 is 1.085microseconds so for 1khz (1milli seconds =1/1khz), is 1ms/1.085microseconds = 921.6 (this value is set to the for loop) #include <reg51.h> void delay() { int i=0; for(i=0;i<922;i++) } void main() { P0=0xff; delay(); P0=0x00; delay(); } Sine Wave generation Since sine wave is plotted in a digital device the number of samples determines the smoothness, hence in this case, more the samples, smoother is the waveform. so a lookup table is been created to get the samples. in the following examples, there are totally 36 samples are taken, starting from 0 degrees to 360 degrees with a step of 10 degrees Degrees A = 5 (1+Sin theta) Where 5 is the full scale voltage DAC = 25.6 * A 0 5 128 30 7.5 192 60 9.3 239 90 10 256 etc…like this we need to calculate for 13 samples with a ste
can u provide me a simple c program on msg q
ReplyDeletehow to initialize a q?
how to send a msg?
how to receive a msg?
how do we know that queue is full?
what happens if the queue is full and how to avoid it?
plz send me the required material
regards
kartheek