Search found 32 matches

@Ttelmah: I agree that with this resolution of ADC I cannot get to accuracy of 1% but the question is there has to be a change of 4.8mV on ADC pin for 1 unit change in ADC reading. If this is true, th ...

I have a fuel level sensor that varies its resistance from 9.5 ohm(empty) to 155ohm(full). The sensor is powered using 12V battery connected to a 30kVA Generator.

The problem is that the level tha ...

I came across CCS C FAQ section and read Port B Button Press Code. I have recently implemented the same thing but differently. I would like to compare the two code and determine which is better and wh ...

You don't need to clear your timer interrupt at the end of it's call. Minor, but a wasted instruction.

However, a suggestion.
I've not looked at how 'frequent' your timer tick actually is, but you ...

yes your delays are a BAD idea - but
i am betting flag

Thank you so much all of you. Fundamentally it was a hardware issue and also the issue pointed out by asmboy. I modified the isr_rda in the ...

The usual problem of "interrupts disabled to prevent re-entrancy" is not
the case in your program, because you have two #use delay(20M)
statements. This causes the #int_rb routine to ha ...

Nobody is going to wade through and solve your programming problems for you.

However one glaring place to look. delay_ms(10) inside an interrupt. Search here for 'why' this is almost certainly the ...

I am using SIM900 with Portb interrupt on change in a project. The system sends SMS every minute. Also an SMS is sent at each interrupt on change. The system runs fine only if there are less than thre ...

I am working on remote monitoring module of generators. We want to have configuration of different parameters such as sensor type selection,etc.

For example there are 5 major temperature sensor ven ...

Thank you everyone. As stated the problem only arises when sending SMS using SIM900a, I suspected it was noisy ground issue. As the switches are normally closed which connects ground to portB, therefo ...

Here is a strange problem.

I am using PCWHD version 5.015 and PIC16f877A. Hardware is as follows:

Portb.4 and Portb.7 are connected to the output of LM324. Inputs of LM324 is connected to two s ...

Well done. Big step forward. Smile

Key thing to learn is the 'approach'. If trying to do something, test the actual thing you are trying to do. Consider what PCM_Programmer's code did. Tested writing ...

"sync_port();" is the modification that enable to read correct values every time the circuit is powered on.

void main()
{
int32 vol,cur,ccr;
output_high(RESET ...

Does the code below correctly show your modification ?
void main()
{
int32 ccr;

// Initialize control lines to cs5463.
output_high(CS);
output_high(RESET);
delay_ms(100);

reset_ ...

Thank you so much. I was considering to move to a different IC but finally get the IC working with the help of your (PCM Programmer) code with a slight modification. The code used to get the wrong val ...