ds3502: Driver for nonvolatile digital potentiometer DS3502
Defines
- DS3502_ADDR_0
- DS3502_ADDR_1
- DS3502_ADDR_2
- DS3502_ADDR_3
- DS3502_MAX
Maximal wiper position value.
Functions
- esp_err_t ds3502_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.
- Parameters:
dev – Device descriptor
addr – Device address,
DS3502_ADDR_...port – I2C port number
sda_gpio – GPIO pin number for SDA
scl_gpio – GPIO pin number for SCL
- Returns:
ESP_OKon success
- esp_err_t ds3502_free_desc(i2c_dev_t *dev)
Free device descriptor.
- Parameters:
dev – Device descriptor
- Returns:
ESP_OKon success
- esp_err_t ds3502_init(i2c_dev_t *dev)
Initialize device.
- Parameters:
dev – Device descriptor
- Returns:
ESP_OKon success
- esp_err_t ds3502_get(i2c_dev_t *dev, uint8_t *pos)
Get wiper position.
- Parameters:
dev – Device descriptor
pos – [out] Position,
0..DS3502_MAX_WIPER- Returns:
ESP_OKon success
- esp_err_t ds3502_set(i2c_dev_t *dev, uint8_t pos, bool save)
Set wiper position.
- Parameters:
dev – Device descriptor
pos – Wiper position,
0..DS3502_MAX_WIPERsave – Save position to nonvolatile memory
- Returns:
ESP_OKon success