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Thank you for the help and advice, I appreciate it.

Tony A

Thanks. Well my problem is that I might not fully understand the shiftout command.

The master is another microcontroller, the Atmega8. The Atmega is sending a clock signal and latch data, the pic...

Hi,

I not sure if this is possible, since I am confused about shiftout command.

I would like to use the pic as a slave device. The pic would receive the clock signal from a master device, and...

I was wondering if anyone could check my code here and see if there are any boo-boo's.

I am not getting the results I have expected. I am using a 4021 shift register sending serial data out to the...

Sorry. I have it all fixed now using your code above. I was pasting it into some old code and wasn't paying attention.

I'll post my code when I get it finished.

Thanks for your help, I...

Fixed, I think. I had some kind of conflict with the pin assignments. (I think).

Thanks again.

It's been awhile since I worked with picbasic pro. I get an error with:

Clock var PORTB.7
Load var PORTB.6
Data_1 var PORTB.5


Don't know why.

Thanks.

Ok, I see. Thanks very much.

Hi,

I am using pic18f452 and want to connect a 4021B shift register to it.

The shift reg is paralell input (switches) and serial output ----> to the pic.

Now I see that in the pic manual the...

Yes, you're right. The on-off time is too fast for the meter to register.

I am just trying to achieve a TTL pulsing; 5V, 0V, on/off at different rates. The LED was put in there just for a visual...

I'm sure that I'm getting 5V to power my PIC.

T

I added "TRISB = 0" and still read approximately 2.5V at portb.7

Thanks,
T

I was wondering about that too, but when you say "portb.7 HIGH", doesn't that automatically take care of that?

OR do you still have to define port b as output before the code?

Thanks,
T

Yes, with the resistor and LED disconnected, I still read 2V out of the portb.7



'DEFINITIONS'
DEFINE OSC 20
DEFINE ADC_BITS 10 ' Set number of bits in result
DEFINE ADC_CLOCK 3...

I don't remember... I'll test again and re-post.

Thanks again,
T

I am using 18F452, and reading portb.7.

It lights an LED the way it should, but I only read 1-2V.

Thanks,
T

Hi,

I was wondering what voltage is produced on an output pin when it is toggled "HIGH"?

I always assumed it was 5V, but when measuring it was only 1V, I wondered if my meter is off.

I am...

Thanks again for your help, sincerely appreciate it.

(Will experiment)

Tony

Yes, right the pic would be a slave. Here is what I have.

shiftin latchPin_in, clockPin_in, MSBFIRST, [latch_receive, clock_receive]

' clockPin_in is a pin on the pic that is attached to the...

The pic would only be receiving clock data and latch data from the master in my case.

And then it would only need to send serial data, and (clock data?) back out to the master.

I'll post my...

Hi,

I was wondering if it is possible to replace a 4021B (parallel to serial) shift register chip with a PIC using shiftin and shiftout functions?

I am assuming that I would first need to...

Darrel, and FalingTrea thanks. I was wondering about that. Thanks again.

Tony

Thanks for the help, I appreciate it.

Would the 2n2222 work for my application? (i.e. just pulling a 5V wire to ground?) Which transistor would you recommend?

Thanks again,

TOny

The load is 5V dc. It's just a simple digital switch that I want to replace/control with the pic.

I just need to control the grounding of the "incoming" 5V dc wire.


If we removed the diode...

Thank you.

Is it possible to just use a 2N2222 transistor?

I found this schematic, however my application is a little different. (It got me thinking though):
...