ls7366r: Driver for LS7366R Quadrature Encoder Counter

Defines

LS7366R_MAX_CLOCK_SPEED_HZ

Enums

enum ls7366r_count_type_t

Counter type.

Values:

enumerator LS7366R_NON_QUAD

enumerator LS7366R_1x_QUAD

enumerator LS7366R_2x_QUAD

enumerator LS7366R_4X_QUAD

enum ls7366r_count_mode_t

Count mode.

Values:

enumerator LS7366R_FREE_RUN

enumerator LS7366R_SINGLE_COUNT

enumerator LS7366R_RANGE_LIMIT

enumerator LS7366R_N_MODULO

enum ls7366r_index_mode_t

Index mode.

Values:

enumerator LS7366R_INDEX_DISABLED

enumerator LS7366R_INDEX_LOAD_CNTR

enumerator LS7366R_INDEX_RESET_CNTR

enumerator LS7366R_INDEX_LOAD_OTR

enum ls7366r_index_sync_t

Index sync or async.

Values:

enumerator LS7366R_INDEX_SYNCHRONOUS

enumerator LS7366R_INDEX_ASYNCHRONOUS

enum ls7366r_counter_bits_t

Counter bits.

Values:

enumerator LS7366R_8_BIT

enumerator LS7366R_16_BIT

enumerator LS7366R_24_BIT

enumerator LS7366R_32_BIT

enum ls7366r_filter_clock_divider_t

Counter clock divider.

Values:

enumerator LS7366R_FILTER_CLK_1

enumerator LS7366R_FILTER_CLK_2

enum ls7366r_counter_enable_t

Counter enable.

Values:

enumerator LS7366R_COUNTER_ENABLE

enumerator LS7366R_COUNTER_DISABLE

enum ls7366r_flag_carry_mode_t

Counter flag carry mode.

Values:

enumerator LS7366R_FLAG_CARRY_ENABLE

enumerator LS7366R_FLAG_CARRY_DISABLE

enum ls7366r_flag_borrow_mode_t

Counter flag borrow mode.

Values:

enumerator LS7366R_FLAG_BORROW_ENABLE

enumerator LS7366R_FLAG_BORROW_DISABLE

enum ls7366r_flag_index_mode_t

Counter flag index mode.

Values:

enumerator LS7366R_FLAG_INDEX_ENABLE

enumerator LS7366R_FLAG_INDEX_DISABLE

enum ls7366r_flag_compare_enable_t

Counter flag compare mode.

Values:

enumerator LS7366R_FLAG_COMPARE_ENABLE

enumerator LS7366R_FLAG_COMPARE_DISABLE

Functions

esp_err_t ls7366r_init_desc(ls7366r_t *dev, spi_host_device_t host, uint32_t clock_speed_hz, gpio_num_t cs_pin)

Initialize device descriptor.

Parameters:

dev – Device descriptor

host – SPI host

clock_speed_hz – SPI clock speed, Hz

cs_pin – CS GPIO number

Returns:

ESP_OK on success

esp_err_t ls7366r_free_desc(ls7366r_t *dev)

Free device descriptor.

Parameters:

dev – Device descriptor

Returns:

ESP_OK on success

esp_err_t ls7366r_set_config(ls7366r_t *dev, const ls7366r_config_t *config)

Configure device.

Parameters:

dev – Device descriptor

config – Configuration

Returns:

ESP_OK on success

esp_err_t ls7366r_get_count(ls7366r_t *dev, int32_t *count)

Get current count.

Parameters:

dev – Device descriptor

count – Count variable

Returns:

ESP_OK on success

esp_err_t ls7366r_set_compare_val(ls7366r_t *dev, int32_t cmp)

set value for compare

Parameters:

dev – Device descriptor

cmp – Compare value

Returns:

ESP_OK on success

esp_err_t ls7366r_clear_counter(ls7366r_t *dev)

clear counter value, set to 0

Parameters:

dev – Device descriptor

Returns:

ESP_OK on success

esp_err_t ls7366r_counter_enable(ls7366r_t *dev, bool enable)

enable or disable counter

Parameters:

dev – Device descriptor

enable – Counter enabled or disabled

Returns:

ESP_OK on success

struct ls7366r_flag_mode_t

#include <ls7366r.h>

Public Members

ls7366r_flag_borrow_mode_t borrow

ls7366r_flag_carry_mode_t carry

ls7366r_flag_compare_enable_t compare

ls7366r_flag_index_mode_t index

struct ls7366r_t

#include <ls7366r.h>

Device descriptor.

Public Members

spi_device_interface_config_t spi_cfg

spi_device_handle_t spi_dev

struct ls7366r_config_t

#include <ls7366r.h>

Device configuration.

Public Members

ls7366r_flag_mode_t flag_mode

ls7366r_counter_enable_t counter_enable

ls7366r_counter_bits_t counter_bits

ls7366r_filter_clock_divider_t filter_clock_divider

ls7366r_index_sync_t index_sync

ls7366r_index_mode_t index_mode

ls7366r_count_type_t count_type