Crate mcp4725

Microchip MCP4725 DAC Driver for Rust Embedded HAL This is a driver crate for embedded Rust. It's built on top of the Rust embedded HAL It supports sending commands to a MCP4725 DAC over I2C. To get started you can look at the examples on how to use this driver on an inexpensive blue pill STM32F103 board.

The driver can be initialized by calling create and passing it an I2C interface.

let mut dac = MCP4725::create(i2c);

A command can then be created and initialized with the device address and some data, and sent the DAC.

let mut dac_cmd = Command::default().address(0b111).data(14);
dac.send(dac_cmd);

New data can be sent using the existing command by just changing the data and re-sending.

dac_cmd = dac_cmd.data(348);
dac.send(dac_cmd);

More information

• MCP4725 datasheet
• API documentation
• Github repository
• Crates.io

Todo

[] Implement read command [] Create an example writing eeprom [] Implement sending multiple consecutive fast commands [] Possibly implement high speed mode

Structs

Command	A Command to send to the MCP4725. Using the address(), command_type(), power_mode() and data() builder methods the parameters for this command can be set. Commands can be sent using the send method on the MCP4725 driver. A command can (and should) be re-used. data() can be used to re-set the data while keeping other parameters the same.
FastCommand	A FastCommand to send to the MCP4725. Fast commands are stripped down commands that can be used to send data in only 2 bytes instead of 3. It can only be used to set the DAC register. Not to write to the EEPROM that stores the default values. As with the normal Command the address(), power_mode() and data() builder methods can be used to set parameters. FastCommands can be sent using the send_fast method on the MCP4725 driver.
MCP4725	MCP4725 DAC driver. Wraps an I2C port to send commands to an MCP4725

Enums

CommandType	The type of the command to send for a Command
PowerMode	Two bit flags indicating the power mode for the MCP4725