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| Search found 12 matches |
| Author | Message |
|---|---|
 Topic: Timer0 configuration |
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| luis.rigoni Replies: 1 Views: 4034 |
 Forum: General CCS C Discussion Posted: Thu Apr 21, 2011 10:42 pm Subject: Timer0 configuration |
| Hello everyone,
I'm using PIC18LF4550 with a 20MHz crystal. My #fuses are: //configure a 20MHz crystal to operate at 48MHz #fuses HSPLL,NOWDT,NOPROTECT,NOLVP,NODEBUG,USBDIV,PLL5,CPUDIV1,VREGEN ... |
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| Topic: Op-Amp to match the SD card and a 5V powered PIC |
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| luis.rigoni Replies: 14 Views: 12039 |
Forum: General CCS C Discussion Posted: Tue Nov 02, 2010 8:48 pm Subject: Op-Amp to match the SD card and a 5V powered PIC |
| Attach a pot to it's input, or a signal generator with a variable amplitude, and put a scope on the output, and test if it does switch 'high' at about 2v, and 'low' somewhere at about 0.5v.
I put a ... |
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| Topic: Op-Amp to match the SD card and a 5V powered PIC |
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| luis.rigoni Replies: 14 Views: 12039 |
Forum: General CCS C Discussion Posted: Tue Nov 02, 2010 4:11 pm Subject: Op-Amp to match the SD card and a 5V powered PIC |
| Thanks for the replies!
To do that, means that you will use "bit banging" i/o for the SPI instead of using the hardware SPI. Maybe I expressed myself badly. I want to use the hardware ... |
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| Topic: Op-Amp to match the SD card and a 5V powered PIC |
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| luis.rigoni Replies: 14 Views: 12039 |
Forum: General CCS C Discussion Posted: Sat Oct 30, 2010 10:13 pm Subject: Op-Amp to match the SD card and a 5V powered PIC |
| Hello everyone,
Much has been said that the DO line of an SD card is not compatible with the DI pin of a PIC running at 5V, because the card works with 3.3V and can not supply enough voltage to a g ... |
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| Topic: usb bootloader and timer0 |
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| luis.rigoni Replies: 16 Views: 33135 |
Forum: General CCS C Discussion Posted: Sat Oct 30, 2010 10:26 am Subject: usb bootloader and timer0 |
| Oops! My bad...
Thank Ttelmah and PCM. It worked perfectly! Now I've learned: |
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| Topic: usb bootloader and timer0 |
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| luis.rigoni Replies: 16 Views: 33135 |
Forum: General CCS C Discussion Posted: Sat Oct 30, 2010 8:55 am Subject: usb bootloader and timer0 |
| Create a global flag variable and initialize it to False. Use the Timer0 isr,
but the only code inside it will be to set the flag = True. In your while loop in main(), get rid of the delay_ms(1000 ... |
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| Topic: usb bootloader and timer0 |
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| luis.rigoni Replies: 16 Views: 33135 |
Forum: General CCS C Discussion Posted: Fri Oct 29, 2010 4:42 pm Subject: usb bootloader and timer0 |
| Comment out the Timer0 interrupt routine, and also the lines that enable interrupts. Move the isr code into a while loop in main(). Put a delay_ms(1000) statement at the end of the while loop.
I d ... |
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| Topic: usb bootloader and timer0 |
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| luis.rigoni Replies: 16 Views: 33135 |
Forum: General CCS C Discussion Posted: Fri Oct 29, 2010 3:31 pm Subject: usb bootloader and timer0 |
| Hello, I'm having problems using a USB bootloader and timer0 with PIC18F4550. I have loaded the EX_USB_BOOTLOADER.C the pic.
In my application I'm trying to send a message through USB to the PC con ... |
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| Topic: Modifications to access an SD card and view data via USB |
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| luis.rigoni Replies: 3 Views: 3953 |
Forum: General CCS C Discussion Posted: Fri Oct 22, 2010 8:07 am Subject: Re: Modifications to access an SD card via USB |
| Maybe I expressed myself wrong. I want the PIC to communicate with the SD card via the SPI interface, of course. But instead of the PIC to communicate with PC via RS232 I want it via USB. | |
| Topic: Modifications to access an SD card and view data via USB |
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| luis.rigoni Replies: 3 Views: 3953 |
Forum: General CCS C Discussion Posted: Thu Oct 21, 2010 10:03 pm Subject: Modifications to access an SD card and view data via USB |
| Hello,
This question may sound noob, but ... how do I modify the example "ex_fat.c" to work with the PIC18F4550 and USB? --> EDIT: Maybe I expressed myself wrong. I want the PIC to ... |
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| Topic: ex_fat.c problem with SPI |
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| luis.rigoni Replies: 3 Views: 3995 |
Forum: General CCS C Discussion Posted: Thu Oct 14, 2010 12:42 pm Subject: ex_fat.c problem with SPI |
| Your compiler version doesn't support those new features.
Is there any way to fix the code to make it compatible with the compiler? |
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| Topic: ex_fat.c problem with SPI |
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| luis.rigoni Replies: 3 Views: 3995 |
Forum: General CCS C Discussion Posted: Thu Oct 14, 2010 9:33 am Subject: ex_fat.c problem with SPI |
| Hello,
I'm starting to develop an SD card reader with the PIC18F4550. Communication with the PC is via USB. USB communication is OK. However when compiling the file ex_fat.c generates 100 errors. ... |
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