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  1. Replies
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    26,730

    Unable to execute MPASMX

    I updated to PBP 3.1.2.4 and MicroCode Studio Plus 5.0.0.5 and now I have a compile error "Unable to execute MPASMX" I installed the latest MPLAB X 5.4, but I'm not able to find the MPASM.exe,...
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    41,233

    Re: Ethernet with microcontrollers

    Thanks for everyone's input, I'll use your reply's to update the steering group.
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    41,233

    Ethernet with microcontrollers

    I have been asked to add Ethernet to the microcontroller on my project. I'm using an 18F4553 at this time. The microcontroller needs to handle the IP itself. I see the PIC18F97J60 supports...
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    10,134

    Re: PIC18F4550 to 18F4553 Comm Issue?

    I defiantly would have mentioned Pickit vs bootloader if I thought that would have anything to do it. I thought they would program what ever I had configured. Sounds like that may not be how the...
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    10,134

    Re: PIC18F4550 to 18F4553 Comm Issue?

    Thought I give an update. I did get the communication working at 115200 using the 24 Mhz clock setting. But then my DT interrupts timer was running 20 % fast (24/20). If enable the HSPLL it seems...
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    10,134

    Re: PIC18F4550 to 18F4553 Comm Issue?

    Ok, so now it works, but I'm more confused...Define OSC 24 causes and error (Frequency not defined), but I changed HSER_SPBRG to 12 any way, and everything is working fine.
    So, why? Apparently my...
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    10,134

    Re: PIC18F4550 to 18F4553 Comm Issue?

    :confused:Still no luck, the data I receive on my PC is garbled from the 4553, I've tried dozens of baud rates and settings. I plugged the com back into a board with a 4550 and the data from it is...
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    10,134

    Re: PIC18F4550 to 18F4553 Comm Issue?

    Thanks for the responses, I can stop looking for the rest of the data sheet. I was too busy looking for fine print I overlooked the highlighted section that says it's the same as the 4550.

    I did...
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    10,134

    PIC18F4550 to 18F4553 Comm Issue?

    I'm having trouble figuring this one out. I have code that works on my circuit board with a 4550, I changed to a 4553 so I could use a 12bit A/D. I moved the code that works with the 4550 to the...
  10. Re: In Circuit programming / boot loader options?

    Thanks for the response.
    The main advantage of the boot loader is you don't need a PicKit 3 or U2 programmer after the boot loader has been flashed to the device (you still need to get the boot...
  11. In Circuit programming / boot loader options?

    Hi I need some advice. I have been using the MicroCode boot loader for several years with the PIC18F2550 and 4550. Now I need a chip with a 12 bit A/D ( maybe the 18F4553?) but I don't find any...
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    3,818

    Re: DT Interupts PortA or PortB?

    Charles and Henrik;
    Preloading TMR3 Worked like a charm, I made it go just a little faster than I need just for some room for error. With a preload of:


    TMR3Preload CON 51650

    I put...
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    Re: DT Interupts PortA or PortB?

    Charles, Thanks for the suggestion, that's working better. How do I make TMR3 faster? It seems to check the interupt at about 76 hz, I'd like to be around 350 hz? Is there a way to do it without...
  14. Replies
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    3,818

    DT Interupts PortA or PortB?

    I need a little help, I'm using a 18F2550, and I'm counting how often a switch opens/closes on PortA.5 (Maybe 4, I don't have my circuit in front of me). I'm looping in my main code counting the...
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    15
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    9,614

    Re: 20MHZ External Oscillator Settings

    I tried the speed test to check code execution time at 24Mhz and 48Mhz. I left the DEFINE OSC 20 for both tests. I used pause loops like Charles suggested, and used 10 minute long tests. I know...
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    9,614

    Re: 20MHZ External Oscillator Settings

    Thanks for the speed test, I'll give it a try and post my results.
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    Re: 20MHZ External Oscillator Settings

    Thanks for the settings, that allowed me to follow the table in the data sheet and make sence of the settings in the .inc files. This is what I have figured out so far:

    I can use DEFINE OSC for...
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    Re: 20MHZ External Oscillator Settings

    I still don't have the 20Mhz XTAL resonating, these are my settings now.
    I have this commented out in the include file:


    ;__CONFIG _CONFIG1L, _PLLDIV_5_1L & _CPUDIV_OSC1_PLL2_1L &...
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    Re: 20MHZ External Oscillator Settings

    Thanks for the advice, I do have a 20Mhz Xtal and 20pf caps for it, It's set up just like the 4Mhz, as far as the hardware side goes. Is the PLL only for the USB, or does it speed up the Pic's code...
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    9,614

    20MHZ External Oscillator Settings

    I'm using an 18F2550, and having trouble figuring out the oscillator settings. Everything worked fine with 4Mhz Crystal, not so much with 20Mhz. I don't even get the crystal to work when looking at...
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    2,693

    Re: DT Average

    I used LONG without any issue, I still need to refine my code.
    Thanks for the help.
    Shane
    :)
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    Re: DT Average

    I'm using an 18LF2550, I should be able to use LONG's, seems like I had issues with LONG's at one time, that was many lines of code about two years ago...in a galaxy far away. I'll give it a try,...
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    DT Average

    I found a post about an average routine that Darrel Taylor built but the link to the code was broke so I checked his website but didn't find it there either. Is that still available? I searched using...
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    Re: Sharing Crystal with 2 IC's

    Yes, this did work, just as Darrel Taylor posted in his reply. I didn't use any additional hardware, just the two capacitors and crystal. I do remember having trouble with one of the IC's, seems...
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    DT Interupts and ICD?

    So, I'm back to breaking things again...I've been using the ICD and boot loader in MicroCode Studio Plus with much joy! I haven't however been able to get the Interupts and ICD to work together. I...
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