Dither configuration helper functions. More...

Classes
struct	DitherConfig
	Dither configuration structure. More...

Functions
DitherConfig	CalculateFromAmplitudeFrequency (float amplitude_ma, float frequency_hz, bool parallel_mode=false, float t_ref_clk_us=DEFAULT_T_REF_CLK_US) noexcept
	Calculate dither configuration from amplitude and frequency.

Variables
constexpr float	F_SYS_HZ = 28'000'000.0F
	System clock frequency (28 MHz)

constexpr float	DEFAULT_T_REF_CLK_US = 1.0F / 28.0F
	tref_clk at MANT=1, EXP=0 (≈35.71 ns)

Detailed Description

Dither configuration helper functions.

Provides high-level functions to calculate dither parameters from user-friendly values.

Formulas:

I_dither = STEPS × STEP_SIZE × 2A / 32767
T_dither = [4×STEPS + 2×FLAT] × t_ref_clk

Where t_ref_clk is set by the per-channel DITHER_CLK_DIV register (see DITHER_CLK_DIV namespace above). The chip's POR default of DITHER_CLK_DIV = 0x0000 makes t_ref_clk = 0, so any channel that needs feedback values populated MUST have DITHER_CLK_DIV programmed to a non-zero MANT/EXP combination first.

Function Documentation

◆ CalculateFromAmplitudeFrequency()

DitherConfig tle92466ed::DITHER::CalculateFromAmplitudeFrequency	(	float	amplitude_ma,
		float	frequency_hz,
		bool	parallel_mode = `false`,
		float	t_ref_clk_us = `DEFAULT_T_REF_CLK_US`
	)

inlinenoexcept

Calculate dither configuration from amplitude and frequency.

Parameters

amplitude_ma	Desired dither amplitude in milliamperes
frequency_hz	Desired dither frequency in Hz
parallel_mode	true if channel is in parallel mode
t_ref_clk_us	Reference clock period in microseconds (default: 0.125 µs)

Returns: DitherConfig structure

Automatically calculates step_size, num_steps, and flat_steps to achieve the desired amplitude and frequency. Uses reasonable defaults for steps and flat period if not specified.

Variable Documentation

◆ DEFAULT_T_REF_CLK_US

constexpr float tle92466ed::DITHER::DEFAULT_T_REF_CLK_US = 1.0F / 28.0F

constexpr

tref_clk at MANT=1, EXP=0 (≈35.71 ns)

◆ F_SYS_HZ

constexpr float tle92466ed::DITHER::F_SYS_HZ = 28'000'000.0F

constexpr

System clock frequency (28 MHz)

Classes