MCP48X1DAC(4) | Device Drivers Manual | MCP48X1DAC(4) |
mcp48x1dac
—
Microchip 48x1 digital to analog converter
mcp48x1dac* at spi? slave ? flags N
The mcp48x1dac
driver supports the MCP48x1
family of digital to analog converters. The digital values to be converted
to analog signal are passed through the
sysctl(8) node.
The driver reports the current voltage output on the chip's DAC
channel through the envsys(4)
API. It calculates these values assuming that internal 2.048V reference
voltage (Vref
) is used.
The following table shows the supported chips. The type of the chip can be selected with the flags argument in the config file.
Designation | Resolution | flags |
MCP4801 |
8 bits | 0 |
MCP4811 |
10 bits | 1 |
MCP4821 |
12 bits | 2 |
The following sysctl(3) variables are provided:
MCP4801/4811/4821 8/10/12-Bit Voltage Output Digital-to-Analog Converter with Internal VREF and SPI Interface Data Sheet.
The mcp48x1dac
driver first appeared in
NetBSD 7.0.
The mcp48x1dac
driver was written by
Radoslaw Kujawa.
This man page is based on mcp3kadc(4) page by Frank Wille.
There are bugs.
August 23, 2015 | NetBSD 10.99 |