ra8_epd_cal_limits_mv_t Struct Reference

The panel's documented VCOM window, in millivolt magnitudes. More...

#include <ra8_epd_cal.h>

Data Fields
uint16_t	min_mv
	Lowest accepted VCOM magnitude, millivolts.
uint16_t	max_mv
	Highest accepted VCOM magnitude, millivolts.

Detailed Description

The panel's documented VCOM window, in millivolt magnitudes.

Range-checking is what turns "a number came back" into "a number worth trusting". A controller that has not finished booting reports 0; a corrupted read reports 0xFFFF; both must be rejected rather than programmed. The window is panel data – state it from the panel's datasheet in the BSP descriptor, not from a guess here.

Invariant

min_mv <= max_mv.

min_mv is non-zero, so zero can never be in range.

Example:

// Waveshare 6 inch HD (IT8951): panels ship labelled around -1.5 V.
const ra8_epd_cal_limits_mv_t limits = {.min_mv = 200U, .max_mv = 4000U};

See also

ra8_epd_cal_vcom_in_range

Definition at line 278 of file ra8_epd_cal.h.

Field Documentation

max_mv

uint16_t ra8_epd_cal_limits_mv_t::max_mv

Highest accepted VCOM magnitude, millivolts.

Definition at line 280 of file ra8_epd_cal.h.

Referenced by ra8_epd_cal_resolve(), and ra8_epd_cal_vcom_in_range().

min_mv

uint16_t ra8_epd_cal_limits_mv_t::min_mv

Lowest accepted VCOM magnitude, millivolts.

Definition at line 279 of file ra8_epd_cal.h.

Referenced by ra8_epd_cal_resolve().

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

• libs/ra8_epd_cal/inc/ra8_epd_cal.h