DRV8847.DRV8847 Class Reference

A motor driver class for the DRV8847 from Texas Instruments. More...

Public Member Functions
def	__init__ (self, nSLEEP, nFAULT, tim)
	Constructs a motor driver object. More...
def	enable (self)
	Brings the DRV8847 out of sleep mode.
def	disable (self)
	Puts the DRV8847 in sleep mode.
def	fault_cb (self, IRQ_irc)
	Callback function to run on fault condition. More...
def	motor (self, pinA, pinB, channel_A, channel_B)
	Initializes and return a motor object associated with DRV8847. More...

Public Attributes
	nSLEEP
	This is an active-high enable pin that corresponds to pin A15. More...
	nFAULT
	This is a pin that detects faults and corresponds to pin B2. More...
	tim
	Variable that specifies timer number. More...
	fault_cb_flag
	A boolean flag that signals the motor of a fault detection. More...
	fault
	Registers the callback function and causes an interrupt when fault is triggered. More...

Detailed Description

A motor driver class for the DRV8847 from Texas Instruments.

Objects of this class can be used to configure the DRV8847 motor driver and to create one or more objects of the Motor class which can be used to perform motor control.

Constructor & Destructor Documentation

__init__()

def DRV8847.DRV8847.__init__	(		self,
			nSLEEP,
			nFAULT,
			tim
	)

Constructs a motor driver object.

The motor driver object is created from three attributes: nSLEEP, nFAULT, and timer number.

Parameters

nSLEEP	This is an active-high enable pin that corresponds to pin A15
nFAULT	This is a pin that detects faults and corresponds to pin B2
tim	Variable that specifies timer number

Member Function Documentation

fault_cb()

def DRV8847.DRV8847.fault_cb	(		self,
			IRQ_irc
	)

Callback function to run on fault condition.

Parameters

IRQ_src

The source of the interrupt request.

motor()

def DRV8847.DRV8847.motor	(		self,
			pinA,
			pinB,
			channel_A,
			channel_B
	)

Initializes and return a motor object associated with DRV8847.

Returns

An object of class Motor

Member Data Documentation

fault

DRV8847.DRV8847.fault

Registers the callback function and causes an interrupt when fault is triggered.

Defines a variable for the interrupt request for fault detection

fault_cb_flag

DRV8847.DRV8847.fault_cb_flag

A boolean flag that signals the motor of a fault detection.

This variable initializes the fault callback flag

nFAULT

DRV8847.DRV8847.nFAULT

This is a pin that detects faults and corresponds to pin B2.

Detects fault conditions that may damage the motors

nSLEEP

DRV8847.DRV8847.nSLEEP

This is an active-high enable pin that corresponds to pin A15.

When set on high, it enables the motors. When set on low, it disables the motors.

tim

DRV8847.DRV8847.tim

Variable that specifies timer number.

Uses an attribute of frequency to create a timer object

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The documentation for this class was generated from the following file:

• DRV8847.py