Espressif ESP32-S2 - Two-Wire Automotive Interface (TWAI)

Chapter 2. API Reference
uint8_t y_axis
Matrix button y axis position.
uint8_t index
Matrix button position index.
struct touch_matrix_message_t
Matrix message type.
Public Members
touch_matrix_event_t event
Matrix event.
touch_matrix_position_t position
Matrix position.
Macros
TOUCH_MATRIX_GLOBAL_DEFAULT_CONFIG()
Type Definitions
typedef touch_elem_handle_t touch_matrix_handle_t
Matrix button instance handle.
typedef void (*touch_matrix_callback_t)(touch_matrix_handle_t, touch_matrix_message_t *,
void *)
Matrix button callback type.
Enumerations
enum touch_matrix_event_t
Matrix button event type.
Values:
TOUCH_MATRIX_EVT_ON_PRESS
Matrix button Press event.
TOUCH_MATRIX_EVT_ON_RELEASE
Matrix button Press event.
TOUCH_MATRIX_EVT_ON_LONGPRESS
Matrix button LongPress event.
TOUCH_MATRIX_EVT_MAX
2.2.22 Two-Wire Automotive Interface (TWAI)
Overview
The Two-Wire Automotive Interface (TWAI) is a real-time serial communication protocol suited for automotive and
industrial applications. It is compatible with ISO11898-1 Classical frames, thus can support Standard Frame Format
(11-bit ID) and Extended Frame Format (29-bit ID). The ESP32-S2’s peripherals contains a TWAI controller that
can be configured to communicate on a TWAI bus via an external transceiver.
Warning: The TWAI controller is not compatible with ISO11898-1 FD Format frames, and will interpret such
frames as errors.
This programming guide is split into the following sections:
Espressif Systems 442
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