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spilz
Joined: 30 Jan 2012
Posts: 219
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| PIC18F47J53 : what are the different functions Pin select ? |
 Posted: Fri Oct 14, 2016 4:15 am |
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hello,
I'm trying to use PIC18F47J53 with pin select, but I don't understand what means each function available :
T0CK, T1G, U2RX (vs RX2 ?) FTL0, T0CKI
C1OUT, U2TX (vs TX2?) UPLOUT, P1A, DT2, SSDMA
Where can I find what they mean and what they do ?
What is the difference between RX2 and U2RX ?
Thanks for your help.
regards |
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temtronic
Joined: 01 Jul 2010
Posts: 9243
Location: Greensville,Ontario
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| Posted: Fri Oct 14, 2016 4:45 am |
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Simple answer... printout the 'header' that CCS uses for that PIC and then compare the 'names' to what uchip uses in the 500-600 pages of the datasheet. Gone are the days of chips with only 14 pins, 16 instructions...
While I don't use that PIC, CCS does try to name pins, registers and bits the same or similar to what uchip has.
Once you get a decade or two proramming PICs, it'll be second nature to you....until then, reading the manuals, is kinda important.
Jay |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Fri Oct 14, 2016 6:38 am |
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It's right there in these sections of the 18F1847J53 data sheet:
10.7.3.1 Input Mapping (page 156)
10.7.3.2 Output Mapping (page 157)
http://ww1.microchip.com/downloads/en/DeviceDoc/30009964C.pdf
Examples:
C1OUT = Comparator 1 Output
SSDMA = SPI DMA Slave Select
SDO2 = SPI2 Data Output
etc.
Last edited by PCM programmer on Fri Oct 14, 2016 10:25 am; edited 2 times in total |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19539
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| Posted: Fri Oct 14, 2016 7:04 am |
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Also look at the header include file for your PIC. Has this in the comments near the top:
| Code: |
////////////////////////////////////////////////////////////////// PIN_SELECT
// #pin_select function=pin
// Valid Pins:
// PIN_A0,PIN_A1,PIN_A5,PIN_B0,PIN_B1,PIN_B2,PIN_B3,PIN_B4,PIN_B5,PIN_B6,
// PIN_B7,PIN_C0,PIN_C1,PIN_C2,PIN_C4,PIN_C5,PIN_C6,PIN_C7,PIN_D2,PIN_D3,
// PIN_D4,PIN_D5,PIN_D6,PIN_D7
// Input Functions:
// INT1,INT2,INT3,T0CK,T3CK,T5CK,CCP1,CCP2,CCP3,T1G,T3G,T5G,U2RX,U2CK,SDI2,
// SCK2IN,SS2IN,FLT0,T0CKI,T3CKI,RX2
// Output Functions:
// NULL,C1OUT,C2OUT,C3OUT,U2TX,U2DT,SDO2,SCK2OUT,SS2OUT,ULPOUT,P1A,P1B,P1C,
// P1D,P2A,P2B,P2C,P2D,P3A,P3B,P3C,P3D,TX2,DT2,SCK2,SSDMA
//
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The names of the pins that can be used for select, and the names of the input/output functions that can be mapped.
Combine this with the data sheet, and the examples (ex_pinselect.c & ex_pin_select2.c), and hopefully things then become easier. |
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