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Hi Barry,
Yes, essentially that's what I was thinking, the sum of 2 10bits can't exceed 11 bits so I can send this straight to the DAC.
If I was then to use a different filter, say 3 or 4 point, it could be possible to have an overflow from the 12 bits, but my thought is to still do a shift...
Hi,
I have a requirement (well assignment) to sample some data from a 12 bit ADC into a 10 bit word, then do some filtering, then pass this back to a 12 bit DAC.
Quantising the 10 bit word form the ADC from what I can read is just a simple as shifting the bits and losing the LSB's. (Correct...
Hi, Yes I am using MPLAB.
I had a go through the data sheet and count them up, I calculated 7 cycles for a complete loop round to the start of each cnt decfsz. I will run MPLAB stopwatch and see what figures I get at each breakpoint for the counters.
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Thanks for these, that...
Yes, I understand that; I have factored into the math the "7 machine cycles" that each loop takes. Based on the data sheet for a PIC16F877A. Can you expand on what you mean in relation to my question about the calculations?
Thanks
Hi,
I have looked around at Delay examples and many of the forums suggest using a nested loop to create large delays. Most of the forums point to a Delay generator tool which creates the code for you based on the clock freq and delay. This is great for implementation but for those of us...
Hi,
Thanks for the all the help, wp100 you were right about the debug on the board, it turns out there was a jumper setting for ICD that needed to be disconnected once programmed. Not obvious in the use guide either so just by trying different switches I got it to work.
Many thanks.
Hi,
Thanks for trying the program, yes I've moved the PORT to D and it's working ok. Seems there must be something with the eblocks that I need to figure out. I thought the debug off command should have done something but it hasn't. I can run it on PORTD fine, just need to find out what the...
I think the semicolon depends on the compiler you are using. I have not posted the full code, yes there is a start/end. The code above works, as in compiles and makes most of the LED's light up. I think the point here is about configuration of the PINS on PORTB that I'm not aware of?
Would...
Thanks, in order to simplify the program I have used the below just to light up all LED's on all the ports as a test. However I get the same issue.
When you say the Pins have other options, from what I understand the TRISB command sets all PORTB pins to output. The data sheet states the pins...
Hi,
Probably a simple question, but I have written a program to count in binary (i.e. output to LED's on PORTB) which is fairly simple and counts from 0 to 16. This works fine in simulation and when programmed onto a PIC16F877A running on a multi matrix eblocks device. I.e the LED's count up in...
Thanks,
I finally got it to work. I had the signal declaration for the internal link inside the for generate loop, I moved this outside into the architecture body and its working. Thanks for the clarification on the If statements though.
J
Hi,
I have the code below which as far I can work out should be connecting a number of components together in a chain, a bit like a ripple carry, but this for a comparator, with MSB first. Is the syntax correct because it does work, if I synthesize the code to see what circuit I get, it seems...
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