tca95x5 - Driver for TCA9535/TCA9555 remote 16-bit I/O expanders for I2C-bus
- group tca95x5
ESP-IDF driver for TCA9535/TCA9555 remote 16-bit I/O expanders for I2C-bus.
Copyright (c) 2019 Ruslan V. Uss unclerus@gmail.com
BSD Licensed as described in the file LICENSE
Defines
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TCA95X5_I2C_ADDR_BASE
Functions
-
esp_err_t tca95x5_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
addr – I2C address (
0b0100<A2><A1><A0>
)port – I2C port number
sda_gpio – SDA GPIO
scl_gpio – SCL GPIO
- Returns:
ESP_OK
on success
-
esp_err_t tca95x5_free_desc(i2c_dev_t *dev)
Free device descriptor.
- Parameters:
dev – Pointer to I2C device descriptor
- Returns:
ESP_OK
on success
-
esp_err_t tca95x5_port_get_mode(i2c_dev_t *dev, uint16_t *mode)
Get GPIO pins mode.
0 - output, 1 - input for each bit in
val
- Parameters:
dev – Pointer to device descriptor
mode – [out] Buffer to store mode, 0 bit for P0.0 .. 15 bit for P1.7
- Returns:
ESP_OK
on success
-
esp_err_t tca95x5_port_set_mode(i2c_dev_t *dev, uint16_t mode)
Set GPIO pins mode.
0 - output, 1 - input for each bit in
val
- Parameters:
dev – Pointer to device descriptor
mode – Mode, 0 bit for P0.0 .. 15 bit for P1.7
- Returns:
ESP_OK
on success
-
esp_err_t tca95x5_port_read(i2c_dev_t *dev, uint16_t *val)
Read GPIO port value.
- Parameters:
dev – Pointer to I2C device descriptor
val – 16-bit GPIO port value, 0 bit for P0.0 .. 15 bit for P1.7
- Returns:
ESP_OK
on success
-
esp_err_t tca95x5_port_write(i2c_dev_t *dev, uint16_t val)
Write value to GPIO port.
- Parameters:
dev – Pointer to I2C device descriptor
val – GPIO port value, 0 bit for P0.0 .. 15 bit for P1.7
- Returns:
ESP_OK on success
-
TCA95X5_I2C_ADDR_BASE