max22200::CfgDpmReg Namespace Reference

CFG_DPM register bit field definitions. More...

Variables
constexpr uint32_t	DPM_ISTART_SHIFT = 8
	DPM_ISTART bit shift (bits 14:8)
constexpr uint32_t	DPM_ISTART_MASK = (0x7Fu << 8)
	DPM_ISTART mask (7-bit)
constexpr uint32_t	DPM_TDEB_SHIFT = 4
	DPM_TDEB bit shift (bits 7:4)
constexpr uint32_t	DPM_TDEB_MASK = (0x0Fu << 4)
	DPM_TDEB mask (4-bit)
constexpr uint32_t	DPM_IPTH_SHIFT = 0
	DPM_IPTH bit shift (bits 3:0)
constexpr uint32_t	DPM_IPTH_MASK = 0x0Fu
	DPM_IPTH mask (4-bit)

Detailed Description

CFG_DPM register bit field definitions.

The CFG_DPM register configures the Detection of Plunger Movement (DPM) algorithm parameters. DPM settings are global and apply to all channels.

Register Layout

Bits	Field	Description
31:21	RSVD	Reserved (write 0)
20:16	RSVD	Reserved (write 0)
15	RSVD	Reserved (write 0)
14:8	DPM_ISTART[6:0]	Starting current for DPM monitoring
7:4	DPM_TDEB[3:0]	DPM debounce time
3:0	DPM_IPTH[3:0]	DPM current dip threshold

DPM Algorithm Parameters

• ISTART: Starting current for DPM monitoring
  • ISTART = DPM_ISTART[6:0] × (IFS / 127)
  • Set ISTART just below the minimum current where the plunger movement dip is expected
• TDEB: Debounce time (minimum dip duration to be recognized)
  • TDEB = DPM_TDEB[3:0] / fCHOP
  • Lower values = more sensitive (may false-trigger on noise)
  • Higher values = less sensitive (may miss valid dips)
• IPTH: Current dip threshold (minimum dip amplitude)
  • IPTH = DPM_IPTH[3:0] × (IFS / 127)
  • Lower values = more sensitive
  • Higher values = less sensitive

DPM Algorithm Behavior

The DPM algorithm monitors current above ISTART until either:

• The programmed IHIT level is reached, OR
• The HIT time (tHIT) ends

A valid plunger movement is detected if:

• A current dip with amplitude > IPTH occurs, AND
• The dip duration > TDEB

If no valid dip is detected, a DPM fault is signaled (if DPM_EN is set for that channel and M_DPM is not masked).

Note

DPM accuracy becomes less reliable if the dip is not pronounced enough.

The current slope above ISTART must be slower than 700mA/ms for reliable detection (to allow the internal ADC to track).

Per datasheet section "Detection of Plunger Movement (DPM)" and "Detection of Plunger Movement Register Description (CFG_DPM)".

Variable Documentation

DPM_IPTH_MASK

constexpr uint32_t max22200::CfgDpmReg::DPM_IPTH_MASK = 0x0Fu

constexpr

DPM_IPTH mask (4-bit)

Examples

/home/runner/work/hf-max22200-driver/hf-max22200-driver/inc/max22200_registers.hpp.

DPM_IPTH_SHIFT

constexpr uint32_t max22200::CfgDpmReg::DPM_IPTH_SHIFT = 0

constexpr

DPM_IPTH bit shift (bits 3:0)

Examples

/home/runner/work/hf-max22200-driver/hf-max22200-driver/inc/max22200_registers.hpp, and /home/runner/work/hf-max22200-driver/hf-max22200-driver/inc/max22200_types.hpp.

DPM_ISTART_MASK

constexpr uint32_t max22200::CfgDpmReg::DPM_ISTART_MASK = (0x7Fu << 8)

constexpr

DPM_ISTART mask (7-bit)

Examples

/home/runner/work/hf-max22200-driver/hf-max22200-driver/inc/max22200_registers.hpp.

DPM_ISTART_SHIFT

constexpr uint32_t max22200::CfgDpmReg::DPM_ISTART_SHIFT = 8

constexpr

DPM_ISTART bit shift (bits 14:8)

Examples

/home/runner/work/hf-max22200-driver/hf-max22200-driver/inc/max22200_registers.hpp, and /home/runner/work/hf-max22200-driver/hf-max22200-driver/inc/max22200_types.hpp.

DPM_TDEB_MASK

constexpr uint32_t max22200::CfgDpmReg::DPM_TDEB_MASK = (0x0Fu << 4)

constexpr

DPM_TDEB mask (4-bit)

Examples

/home/runner/work/hf-max22200-driver/hf-max22200-driver/inc/max22200_registers.hpp.

DPM_TDEB_SHIFT

constexpr uint32_t max22200::CfgDpmReg::DPM_TDEB_SHIFT = 4

constexpr

DPM_TDEB bit shift (bits 7:4)

Examples

/home/runner/work/hf-max22200-driver/hf-max22200-driver/inc/max22200_registers.hpp, and /home/runner/work/hf-max22200-driver/hf-max22200-driver/inc/max22200_types.hpp.