ra8_board_touch_cfg_t Struct Reference

The two touch settings that are an APPLICATION choice, not a board fact. More...

#include <ra8_board_ek_ra8d2_touch.h>

Data Fields
uint8_t	max_points
	Cap on reported contacts; 0 selects the board default (the GT911's full k_ra8_touch_max_points capacity).
uint8_t	irq_pin
	Attention pin, or k_ra8_touch_irq_pin_unset for a polled controller.

Detailed Description

The two touch settings that are an APPLICATION choice, not a board fact.

Everything else – channel, target address, bus rate, source clock – comes from the board (ra8_board_touch_wiring_t) or from CGC, so it is not offered here. Zero-initialise (= {}) to take the board defaults: the GT911's full contact capacity, polled.

Invariant

max_points is 0 (meaning "board default") or at most k_ra8_touch_max_points.

// Single-contact tap detection, polled:
const ra8_board_touch_cfg_t cfg = {.max_points = 1U,
                                   .irq_pin    = k_ra8_touch_irq_pin_unset};

See also

ra8_board_touch_open Consumes this descriptor.

ra8_touch_cfg_t The driver-level descriptor it is expanded into.

Since

0.1.0

Definition at line 83 of file ra8_board_ek_ra8d2_touch.h.

Field Documentation

irq_pin

uint8_t ra8_board_touch_cfg_t::irq_pin

Attention pin, or k_ra8_touch_irq_pin_unset for a polled controller.

Zero-initialising selects pin 0, so state the sentinel explicitly when polling a board whose pin 0 is wired to something else.

Definition at line 86 of file ra8_board_ek_ra8d2_touch.h.

Referenced by ra8_board_touch_open().

max_points

uint8_t ra8_board_touch_cfg_t::max_points

Cap on reported contacts; 0 selects the board default (the GT911's full k_ra8_touch_max_points capacity).

Definition at line 84 of file ra8_board_ek_ra8d2_touch.h.

Referenced by ra8_board_touch_open().

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

• libs/ra8_board_ek_ra8d2/inc/ra8_board_ek_ra8d2_touch.h