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Frequency counting
plz help me modify this code so that it may calculate the frequency of signal for me…
CODE:
#include ltAT89X51.Hgt //
void stepper(unsigned char);//stepper motor
void msdelay(unsigned int);
void main()
{
unsigned char value;
T1=1; //make t1 an input
msdelay(1000); // to count no of pulses in 1 sec
TMOD=0×06; //counter 1,mode 2 ,8 bit auto reload mode
TH1=0; //set count to 0
while(1) //repeat forever
{
do
{
TR1=1; //start timer
value=TL1; //store tL1 in value
stepper(value);
}while(TF1==0); //wait here
TR1=0; //stop timer
TF1=0; //clear flag
}
}
void stepper(unsigned char value)
{
if(value==00000010) //compare it with 2Hz frequency
P1=0×66;
msdelay(200);
P1=0xCC;
msdelay(200);
P1=0×99;
msdelay(200);
P1=0×33;
msdelay(200);
}
void msdelay(unsigned int itime)
{
unsigned int i,j;
for(i=0;iltitime;i++)
for(j=0;jlt1275;j++);
}
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Code: #include<reg51.h> unsigned char inc = 0; void MSDelay(unsigned int); void ex0_isr (void) interrupt 0 { inc++; // Increment the count } void ex1_isr (void) interrupt 1 { inc=inc--; // Deccrement the count } sbit pwm=P2^0; sbit pwmn=P2^1; sbit enable=P2^2; void universal_delay(unsigned int); void main( ...Respected Sir/Maam; I am working on 8051.We are doing programming in 8051 C.I am having a doubt related to STEPPER motor.Our project is on RFID BASED AUTO TOLL PLAZA.This is the program that I have written for forward motion and reverse of stepper motor.Will you please help me whether this program is correct or not and also to stop the motor at a particular instant what changes I need to make in this. #includeltreg51.hgt #define ld P1 #define stepper P2 sbit obj = P3^1; sbit led = P3^2; void msdelay(unsigned int); void delay(unsigned int); void UP(); void DOWN(); void main() { unsigned char j,k; ld = 0xFF; obj = 1; while(1) { //unsigned char m1[]= "WELCOME"; //unsigned char ...sir i have interface 16x2 lcd display with microcontroller at89c51 and it is working fine in proteus as well as keil compiler ... but when i m burning hex code and interfacing with my hardware i am not able to get the output .... i m posting my coding over here .... please help me out ... thanks in advance #includeltreg51.hgt #define dp P0 sbit rs=P0^1; sbit en=P0^2; sbit rw=P0^3; lcdcomm(unsigned char val); lcddat(unsigned char val); msdelay(unsigned int val); write_nibble(unsigned int val); unsigned char mydat[]="hello kaushal"; unsigned char urdat[]="hello amit"; main() { P0=0xff; msdelay(10); lcdint(); lcdcomm(0x01); msdelay(1); lcdcomm(0x80); msdelay(1); lcddat('*'); msdelay(1); lcdcomm(0x82); msdelay(1); dis_measure(); lcdcomm(0xc2); msdelay(1); dis_d_t(); } unsigned char z; lcdint() { rs=0; rw=0; dp=0x28; en=1; msdelay(1); en=0; msdelay(1); lcdcomm(0x28); msdelay(1); lcdcomm(0x0f); msdelay(1); } dis_measure() { unsigned char z; for(z=0;zlt=15;z++) { lcddat(urdat[z]); msdelay(1); } } dis_d_t() { unsigned char z; for(z=0;zlt=15;z++) { lcddat(mydat[z]); msdelay(1); } } /********************************/ lcdcomm(unsigned char val) { rs=0; rw=0; write_nibble(); } /*****************************/ lcddat(unsigned char val) { rs=1; rw=0; write_nibble(); } /**************************/ msdelay(unsigned int val) { unsigned int i,j; for(i=0;ilt=val;i++) for(j=0;jlt=200;j++); } /************************/ write_nibble(unsigned int ...Hi, i have written a small program wherein i change the value on Pot and see the value on the LCD. but m not able to see anything. Please help. the program is as follows. #include ltreg51.hgt sbit rd = P2^5; // for ADC sbit wr = P2^6; // for ADC sbit INTR = P2^7; // for ADC sbit rs = P2^0; // for LCD initilisation sbit rw = P2^1; // for LCD initilisation sbit en = P2^1; // for LCD initilisation sfr ldata = 0x90; //select port 1 for LCD input sfr MYDATA = 0x0B0; //select port 3 for input from ADC void MSDelay(unsigned int itime) { unsigned int i,j; for(i=0;iltitime;i++) for(j=0;jlt1275;j++); } lcdcmd(unsigned char ...The code is below, it run perfectly when i run it step by step during debugging. But when i run it continuously it stuck somewhere after executing the ISR. Is there any mistake i done? please give suggestion if i done any. Thank you. #include <REGX51.H> sbit motof = P2^0; sbit motob = P2^1; void timer2() { TH0 = 0xff; TL0 = 0xfd; TR0 = 1; while(TF0 == 0); ...hi there I m working on coin counter project which can count the no. of coin entering in a boc. 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"ledstiill" - 0 Error(s), 1 Warning(s). please help mehi...im making a digital clock using DS12887 and at89c52. 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I've used Counter 0 16-bit mode. And I am actually recording values in TL0 and TH0 as the counter is run as then they are refreshed. The problem is that TL0 and TH0 gives the values in HEX, and I am not able to implement a formula to calibrate the value, since I cannot multiply or divide the HEX values that I get from the TL0 and TH0. Please advise me some technique in C-programming on how can I "combine" TH0 and TL0 values to get values in a single variable then how can ...The example code using keil and simulated using proteus CODE: #includeltregx51.hgt #includeltintrins.hgt sbit scl = P2^0; sbit sda = P2^1; void msdelay(unsigned char ms) { int i,j; for(i=0;ilt=ms;i++) for(j=0;jlt=6000;j++); } void sta() { sda = 1; scl = 1; _nop_(); sda = 0; _nop_(); scl = 0; } void stop() { sda = 0; scl = 1; msdelay(15); sda = 1; msdelay(10); } void ack() { sda = 1; scl = 1; F0 = 0; if(sda == 0) F0 = 1; scl = 0; _nop_(); } void mack() { sda = 0; scl = 1; _nop_(); scl = 0; } void mnack() { sda = 1; scl = 1; _nop_(); scl = 0; } char rdata() { unsigned char nn=0xff,mm=0x80,uu=0x7f; char j; sda=1; for(j=0;jlt8;j++) ...Hi, I am using p89v51rd2 uc where i am trying to implement watch dog timer. 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