Comments on: Programming PIC Microcontrollers in C http://baltimorehackerspace.com/2010/02/programming-pic-microcontrollers-in-c/ Maryland Electronics, Software, Science and Robotics Club Wed, 25 Jan 2012 07:01:18 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: superfro http://baltimorehackerspace.com/2010/02/programming-pic-microcontrollers-in-c/comment-page-1/#comment-2153 superfro Tue, 01 Nov 2011 21:51:15 +0000 http://harfordhackerspace.org/?p=526#comment-2153 @Gigi - the delay_ms() function is calculated based off of the #use statement in the header. In the example it is "#use delay(clock=8M)" which sets the delay loop based off of a 8 mhz clock. If you leave that statement as 8mhz and change the crystal to 4mhz then yes, it may take 100ms when you delay_ms(50); However that is not advised. You should update your #use statement to "#use delay(clock=4M)" and delay_ms(50) will still be 50 ms delay. @Gigi – the delay_ms() function is calculated based off of the #use statement in the header. In the example it is “#use delay(clock=8M)” which sets the delay loop based off of a 8 mhz clock. If you leave that statement as 8mhz and change the crystal to 4mhz then yes, it may take 100ms when you delay_ms(50); However that is not advised. You should update your #use statement to “#use delay(clock=4M)” and delay_ms(50) will still be 50 ms delay.

]]> By: Gigi http://baltimorehackerspace.com/2010/02/programming-pic-microcontrollers-in-c/comment-page-1/#comment-2148 Gigi Sun, 30 Oct 2011 15:11:03 +0000 http://harfordhackerspace.org/?p=526#comment-2148 What if I change the processor to 4Mhz? Will the delay(50) in fact will delay with 100ms? What if I change the processor to 4Mhz? Will the delay(50) in fact will delay with 100ms?

]]> By: Squintz http://baltimorehackerspace.com/2010/02/programming-pic-microcontrollers-in-c/comment-page-1/#comment-1711 Squintz Tue, 14 Jun 2011 13:13:19 +0000 http://harfordhackerspace.org/?p=526#comment-1711 @Frasker, I got that diagram from the PicKit documents. My guess is that it was created from Altium when they designed the board. @Frasker, I got that diagram from the PicKit documents. My guess is that it was created from Altium when they designed the board.

]]> By: Frasker http://baltimorehackerspace.com/2010/02/programming-pic-microcontrollers-in-c/comment-page-1/#comment-1710 Frasker Tue, 14 Jun 2011 03:13:50 +0000 http://harfordhackerspace.org/?p=526#comment-1710 Great tutorial! What software you use to draw the Pickit2 diagram? Great tutorial! What software you use to draw the Pickit2 diagram?

]]> By: Joseph http://baltimorehackerspace.com/2010/02/programming-pic-microcontrollers-in-c/comment-page-1/#comment-1444 Joseph Sun, 27 Feb 2011 16:18:54 +0000 http://harfordhackerspace.org/?p=526#comment-1444 Hi Squintz, I have read your tutorial about pics and I think it was a great work, very detailed and perfect for beginners like me XD. I was wondeting if you coudl help me to understand something about the clock speed. I am programming with PIC C Compiler and i don't know how the number in the delay function works. If im running at 4MHz, the delay function is delay_ms(1000), but if im running at 8Mhz, the delay function is delay_ms(500). What happens if i want to use a crsytal with a lower frequency or higher frequency? How could I determine the value within the delay fucntion? I hope you can help me, and thanks in advanced. Hi Squintz, I have read your tutorial about pics and I think it was a great work, very detailed and perfect for beginners like me XD.
I was wondeting if you coudl help me to understand something about the clock speed.
I am programming with PIC C Compiler and i don’t know how the number in the delay function works.
If im running at 4MHz, the delay function is delay_ms(1000), but if im running at 8Mhz, the delay function is delay_ms(500). What happens if i want to use a crsytal with a lower frequency or higher frequency? How could I determine the value within the delay fucntion?

I hope you can help me, and thanks in advanced.

]]> By: Harford HackerSpace | Powered By Nerd http://baltimorehackerspace.com/2010/02/programming-pic-microcontrollers-in-c/comment-page-1/#comment-371 Harford HackerSpace | Powered By Nerd Sun, 27 Jun 2010 03:58:44 +0000 http://harfordhackerspace.org/?p=526#comment-371 [...] be sure to take a look at their PIC Tutorials! Share and [...] [...] be sure to take a look at their PIC Tutorials! Share and [...]

]]> By: New! PicKit 2 Progammer Tutorial - (Baltimore) Harford Hackerspace http://baltimorehackerspace.com/2010/02/programming-pic-microcontrollers-in-c/comment-page-1/#comment-317 New! PicKit 2 Progammer Tutorial - (Baltimore) Harford Hackerspace Sun, 11 Apr 2010 17:31:16 +0000 http://harfordhackerspace.org/?p=526#comment-317 [...] sure to read David Powell’s “Programming PIC Microcontrollers in C” as a precursor to Paul’s [...] [...] sure to read David Powell’s “Programming PIC Microcontrollers in C” as a precursor to Paul’s [...]

]]> By: Using the PICkit 2 : As a Programmer - (Baltimore) Harford Hackerspace http://baltimorehackerspace.com/2010/02/programming-pic-microcontrollers-in-c/comment-page-1/#comment-315 Using the PICkit 2 : As a Programmer - (Baltimore) Harford Hackerspace Sun, 11 Apr 2010 17:11:12 +0000 http://harfordhackerspace.org/?p=526#comment-315 [...] sure you’ve read the previous tutorial ‘Programming PIC Microcontrollers in C‘, if you haven’t, you should go familiarize yourself with it now.  Continuing on from [...] [...] sure you’ve read the previous tutorial ‘Programming PIC Microcontrollers in C‘, if you haven’t, you should go familiarize yourself with it now.  Continuing on from [...]

]]> By: NEW! Tutorial Posted - (Baltimore) Harford Hackerspace http://baltimorehackerspace.com/2010/02/programming-pic-microcontrollers-in-c/comment-page-1/#comment-283 NEW! Tutorial Posted - (Baltimore) Harford Hackerspace Sun, 21 Feb 2010 22:20:02 +0000 http://harfordhackerspace.org/?p=526#comment-283 [...] Check it out Here! [...] [...] Check it out Here! [...]

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