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I want to use uart 3 port on PIC24FJ256GB110

 
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pigsweet
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I want to use uart 3 port on PIC24FJ256GB110
PostPosted: Fri Jan 30, 2009 9:10 pm     Reply with quote
I read CCS 4.084. it can use 2 Uart. but the PIC24FJ256 has 4 port and I want to use 3 uart. How to use. How to write. And Who it khow please.
let.s me khow. Thank you so much please..............................
FvM



Joined: 27 Aug 2008
Posts: 2337
Location: Germany

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PostPosted: Sat Jan 31, 2009 10:40 am     Reply with quote
As previously repoprted, CCS wasn't able yet to supply a devices.dat and device include file, that gives full support of PIC24FJ128GA parts. They have forgotten e.g. UART 3 and 4. You can use the Device Editor tool to supplement the missing interrupt information and add the SFR definitions to the device file manually. Or, simply specify PIC24FJ128GBxxx.

I just realized, that I didn't read your post thorougly, as you are already talking of the xxxGB chip. You have to define the respective SFR and functions by yourself, e.g.:

Code:
#word U3MODE = 0x250
#word U3STA = 0x252
#byte U3TXREGL = 0x254
#byte U3TXREGH = 0x255
#byte U3RXREGL = 0x256
#word U3BRG = 0x258
#bit  U3EN = 0x250.15
#bit  U3OERR = 0x252.1
#bit U3RXIF = 0x8E.2
#bit U3RXIE = 0x9E.2
#bit U3TXIE = 0x9E.3
#bit U3TXBF = 0x253.1
#bit U3TRMT = 0x253.0
#bit U3ERIF = 0x8e.2

void putc_u3(char c)
{
   while (U3TXBF);
   U3TXREGL = c;
}
char getch_u3(void)
{
   U3RXIF = 0;
   return U3RXREGL;
}
#define kbhit_u3() (U3RXDA)
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