User Buttons - Digilent Basys MX3 Reference Manual

7/30/2019
Library functions for using the switches are contained in the Basys MX3 library pack, SWT library. However, the user can easily use the
switches without the SWT library, as presented above.
4.3. Shared Pins
As shown in the connectivity table above, SW7 driving signal is shared with the TRIG_2 signal in 2×15 Pins Debug Header.

5. User Buttons

There are five buttons on the board, labeled BTNU, BTNL, BTNC, BTNR, BTND both on the board and in the schematic, attached to five
digital IO pins of PIC32. Reading the buttons is done by basic access to an input IO pin. Read more details in Digital Inputs and Outputs
chapter.
Figure 5.1 shows the way the buttons are electrically connected on the Basys MX3.
5.1. Connectivity
Table 5.1. Button connectivity.
Label Schematic Name
BTNU BTNU
BTNL BTNL
BTNC BTNC
BTNR BTNR
BTND BTND
All the pins must be defined as digital input: their corresponding TRIS bit must be set to 1, and analog function must be disabled for pins
corresponding to BTNU, BTNL, BTNR, BTND.
https://reference.digilentinc.com/reference/microprocessor/basys-mx3/reference-manual?_ga=2.68739409.1349070004.1564406803-1961480359....
Basys MX3 Reference Manual [Reference.Digilentinc]
PIC32 Pin
PGEC1/AN1/RPB1/CTED12/RB1
PGED1/AN0/RPB0/RB0
RPF0/PMD11/RF0
AN8/RPB8/CTED10/RB8
RPA15/RA15
Pin Shared With Description
PGC Button up
PGD Button left
TRIG_1 Button center
S0_PWM Button right
S1_PWM Button down
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