MCP492x series SPI Digital-to-Analog Converter

Supported interfaces

• webiopi.devices.analog.DAC)

Python Constructor

Use following constructors if you want to create some MCP492x from your python scripts.

• MCP4921(chip)
• MCP4922(chip)

Parameters :

• chip (optional, default=0): SPI Chip Enable number (0=CE0, 1=CE1)

from webiopi.devices.analog import MCP4921, MCP4922

# Setup a MCP4922 on SPI CE0
mcp0 = MCP4922()
# or
mcp0 = MCP4922(chip=0)

# Setup a MCP4922 on SPI CE1
mcp1 = MCP4922(chip=1)

Configuration File syntax

Use following syntax to setup some MCP492x in the webiopi service/command configuration file.

[DEVICES]
# Setup a MCP4922 on SPI CE0
mcp0 = MCP4922
# or
mcp0 = MCP4922 chip:0

# Setup a MCP4922 on SPI CE1
mcp1 = MCP4922 chip:1