pcf8575 - Driver for PCF8575 16-bit I/O expander for I2C-bus¶
- group pcf8575
ESP-IDF driver for PCF8575 remote 16-bit I/O expander for I2C-bus.
Copyright (c) 2019 Ruslan V. Uss unclerus@gmail.com
MIT Licensed as described in the file LICENSE
Defines
-
PCF8575_I2C_ADDR_BASE¶
Functions
-
esp_err_t pcf8575_init_desc(i2c_dev_t *dev, uint8_t addr, i2c_port_t port, gpio_num_t sda_gpio, gpio_num_t scl_gpio)¶
Initialize device descriptor.
Default SCL frequency is 400kHz
- Parameters
dev – Pointer to I2C device descriptor
port – I2C port number
addr – I2C address (
0b0100<A2><A1><A0>
for PCF8575)sda_gpio – SDA GPIO
scl_gpio – SCL GPIO
- Returns
ESP_OK
on success
-
esp_err_t pcf8575_free_desc(i2c_dev_t *dev)¶
Free device descriptor.
- Parameters
dev – Pointer to I2C device descriptor
- Returns
ESP_OK
on success
-
PCF8575_I2C_ADDR_BASE¶