which pins are uart pins in pic24fj128gb106

• Apr 18, 2015

• #1

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engineer khan

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i have pic24fj128gb106 microcontroller and i need to use its uart pins but i dont find it ,the pin diagram is shown

 

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• Apr 18, 2015

• #2

barry

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Here's a big RTFM for you: There are no dedicated UART pins. It took me 1 minute to find your answer; now you try. It's fun and easy!!

 

• Apr 18, 2015

• #3

betwixt

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Clue....... 'RP' pins.

Brian.

 

• Apr 18, 2015

• #4

FvM

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Keyword is Peripheral Pin Select

 

• Apr 20, 2015

• #5

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engineer khan

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I sought too much but i didnt find uart pins in the above controller
please someone is there to help me thanks

 

• Apr 20, 2015

• #6

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horace1

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engineer khan said:

I sought too much but i didnt find uart pins in the above controller
please someone is there to help me thanks

Click to expand...

have a look at section 10.4 Peripheral Pin Select of the data sheet
https://ww1.microchip.com/downloads/en/DeviceDoc/39897c.pdf

also have a look at
https://singularengineer.com/peripheral-pin-select-pps-using-xc16-and-mplab-x/

 

• Apr 20, 2015

• #7

betwixt

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From the data sheet - Register 17.1 (page 202):

Note 1: If UARTEN = 1, the peripheral inputs and outputs must be configured to an available RPn pin. See
Section 10.4 “Peripheral Pin Select” for more information.

Click to expand...

You have to assign the TX and RX pins of the selected UART each to one remappable pin. You choose the pins, they can be any of the remappable ones.

Brian.

 

• Apr 21, 2015

• #8

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engineer khan

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i didnt find uart pins in pin diagram what to do please

 

• Apr 21, 2015

• #9

betwixt

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I would suggest reading classes or an alternative profession may be the best way forward.

Brian.

 

• Apr 21, 2015

• #10

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horace1

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engineer khan said:

i didnt find uart pins in pin diagram what to do please

Click to expand...

the image attached shows the schematic of a PCB using a PIC24FJ256GB110
the PC serial is connected to pins 49 (RP10) and 50 (RP17)

the code to set up the UART pins is

Code:

     #include <pps.h>
    iPPSOutput(OUT_PIN_PPS_RP17, OUT_FN_PPS_U2TX);      // TXD
    iPPSInput (IN_FN_PPS_U2RX, IN_PIN_PPS_RP10);       // RXD

 

• Apr 21, 2015

• #11

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engineer khan

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uart pin designation in pic24fjxxxgb106

I tried my best but not found uart pins such as Rx Tx pins in pic24fjxxxgb106 microcontroller,,,i dont know their representation in the pin diagram please please help me finding uart pins in pic24fj series,what is their representation in pin diagram???

 

• Apr 21, 2015

• #12

esp1

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Re: uart pin designation in pic24fjxxxgb106

hi,
Look at page #140 of the datasheet, it requires that you define the UART using the Peripheral pin selection register.

Also Table 4-10 on pages #50 & #57.

E

 

• Apr 21, 2015

• #13

betwixt

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Note that horace1's example code uses UART2, you need to change U2TX and U2RX to UxTX and UxRX where 'x' is the UART number you are using.

Brian.

 

• Apr 21, 2015

• #14

barry

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'There is none so blind as he who will not see.'

There is none so deaf as he who will not listen.

 

• Apr 21, 2015

• #15

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horace1

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attached is the schematic for a PIC24FJ64GB004 (similar device to a pic24fj128gb106)

the PC serial is connected to pins 6 (RP2) and 7 (RP3)

the code to map the pins to UART2 is (accessing the PPS registers directly not using pps.h functions)

Code:

    _RP3R = 5;					// for UART2 Rx and Tx
    _U2RXR = 2;