tmc51x0::IHOLD_IRUN_Register Union Reference

Driver current control register (IHOLD_IRUN) More...

#include <tmc51x0_registers.hpp>

Public Attributes
uint32_t	value
struct {
uint32_t   ihold: 5
	Bits 4..0: Standstill current (0=1/32...31=32/32) More...
uint32_t   reserved1: 3
	Reserved bits (5..7) More...
uint32_t   irun: 5
	Bits 12..8: Motor run current (0=1/32...31=32/32) More...
uint32_t   reserved2: 3
	Reserved bits (13..15) More...
uint32_t   iholddelay: 4
	Bits 19..16: Motor power down delay (0-15) More...
uint32_t   reserved3: 12
	Reserved bits (20..31) More...
}	bits

Detailed Description

Driver current control register (IHOLD_IRUN)

Configuration for motor run current and standstill current.

Bit assignments per datasheet:

• Bits 4..0: IHOLD - Standstill current (0=1/32...31=32/32) In combination with StealthChop mode, setting IHOLD=0 allows to choose freewheeling or coil short circuit for motor stand still.
• Bits 12..8: IRUN - Motor run current (0=1/32...31=32/32) Choose sense resistors so that normal IRUN is 16 to 31 for best microstep performance.
• Bits 19..16: IHOLDDELAY - Controls the number of clock cycles for motor power down after motion as soon as standstill is detected (stst=1) and TPOWERDOWN has expired. The smooth transition avoids a motor jerk upon power down. 0: instant power down 1..15: Delay per current reduction step in multiple of 2^18 clocks

Member Data Documentation

[struct]

struct { ... } tmc51x0::IHOLD_IRUN_Register::bits

ihold

uint32_t tmc51x0::IHOLD_IRUN_Register::ihold

Bits 4..0: Standstill current (0=1/32...31=32/32)

iholddelay

uint32_t tmc51x0::IHOLD_IRUN_Register::iholddelay

Bits 19..16: Motor power down delay (0-15)

irun

uint32_t tmc51x0::IHOLD_IRUN_Register::irun

Bits 12..8: Motor run current (0=1/32...31=32/32)

reserved1

uint32_t tmc51x0::IHOLD_IRUN_Register::reserved1

Reserved bits (5..7)

reserved2

uint32_t tmc51x0::IHOLD_IRUN_Register::reserved2

Reserved bits (13..15)

reserved3

uint32_t tmc51x0::IHOLD_IRUN_Register::reserved3

Reserved bits (20..31)

value

uint32_t tmc51x0::IHOLD_IRUN_Register::value

---

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

• tmc51x0_registers.hpp