User manual

Basys MX3™ Board Reference Manual
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Page 34 of 56
Name
PIC32 pin
Motor Driver pin
Description
MODE
RPF1/PMD10/RF1
MODE
logic low selects IN/IN mode
logic high selects PH/EN mode
AIN1
PGED3/AN3/C2INA/RPB3/RB3
AIN1/APHASE
IN/IN mode: Logic high sets AOUT1 high
PH/EN mode: Sets direction of H-bridge A
AIN2
RPE8/RE8
AIN2/AENBL
IN/IN mode: Logic high sets AOUT2 high
PH/EN mode: Logic high enables H-bridge A
BIN1
RPE9/RE9
BIN1/BPHASE
IN/IN mode: Logic high sets BOUT1 high
PH/EN mode: Sets direction of H-bridge B
BIN2
AN5/C1INA/RPB5/RB5
BIN2/BENBL
IN/IN mode: Logic high sets BOUT2 high
PH/EN mode: Logic high enables H-bridge B
Table 14.2. Motor connectivity.
The command pins (MODE, AIN1, AIN2, BIN1, BIN2) must be defined as digital output and the analog functionality
for AIN1 and BIN2 disabled:
TRISFbits.TRISF1 = 0; //set RF1 (MODE) to be an output
TRISBbits.TRISB3 = 0; //set RB3 (AIN1) to be an output
ANSELBbits.ANSB3 = 0; //disable analog functionality for RB3 (AIN1)
TRISEbits.TRISE8 = 0; //set RE8 (AIN2) to be an output
TRISEbits.TRISE9 = 0; //set RE9 (BIN1) to be an output
TRISBbits.TRISB5 = 0; //set RB5 (BIN2) to be an output
ANSELBbits.ANSB5 = 0; //disable analog functionality for RB5 (BIN2)
The following signals are routed to the MOTOR_OUT board to wire connector:
Connector Label
Motor Driver pin
Description
VEXT
-
The external power that can be applied to the motors, selected using
MOTOR PWR jumper block (0 to 11 Volts)
GND
-
The GND for the external power applied on VEXT
A1
AOUT1
IN/IN mode: Signal 1 of the stepper motor
PH/EN mode: Signal 1 of the DC motor A
A2
AOUT2
IN/IN mode: Signal 2 of the stepper motor
PH/EN mode: Signal 2 of the DC motor A
B1
BOUT1
IN/IN mode: Signal 3 of the stepper motor
PH/EN mode: Signal 1 of the DC motor B
B2
AOUT2
IN/IN mode: Signal 4 of the stepper motor
PH/EN mode: Signal 2 of the DC motor B
Table 14.3. Motor connector pinout.