Hi Iam facing displays flickering and data over write problem since last 20 days. Iam using delay but I am not able to salve it Here iam using 74LS373(4) latches. Iam sending the data through PORT 2 and enable the latches using PORT 3 Iam using ADC804+89c51+74LS373(4 numbers) +7 seven segment displays (4 numbers) Please check my code given below and give me a proper 'C' code for this problem. Thank you Regards Naresh This code i used in my project sbit c1=P3^0; sbit c2=P3^1; sbit c3=P3^2; Sbit C4=P4^3; s1,s2,s3,s4=data; while(1) { P2=s1; c1=1; /* Latch enable*/ Delay(100); c1=0; /* Latch disable*/ P2=s2; c2=1; Delay(100); c2=0; P2=s3; c3=1; Delay(100); c3=0; P2=s3; c3=1; Delay(100); c3=0; } void Delay(unsigned int time) { unsigned int i,j; for(i=0;i<time;i++) for(j=0;j<1275;j++); }
Hi In my program I used "if (value! = Value1)". That is my printing mistake. Yesterday I fallowed u r suggestion it is working well. To day I have use in the main program. Now presently I replaced 74LS373 with HEF4511BP (BCD to 7-segment Latch/decoder/driver). All its operations are in nano seconds (ns). My clock speed is 1micro second. Above things can affect my program. Regards Naresh
u r suggestion I see no suggestion that you use microresistors Erik
it is working well
Hi Thank you very much Present my circuit is working well Now I want add variable set point to the circuit Please can u give me some information about variable set point circuit. Regards Chandu
1) what do you mean by "variable set point" Please can u give me some information when specifically asking micro (u) for information, e-mail him, do not use the forum