Difference between revisions of "I2C DAC"

From BitWizard Wiki
Jump to navigation Jump to search
Line 1: Line 1:
Based on the MCP4728 chip from Microchip.<br>
Based on the MCP4726 chip from Microchip.<br>
http://ww1.microchip.com/downloads/en/DeviceDoc/22187a.pdf
http://ww1.microchip.com/downloads/en/DeviceDoc/22272C.pdf <br>
<br>

I2C address:<br>

1100 000 and 1100 001 '''OR'''<br>
1100 010 and 1100 011<br>
<br>
Set a voltage:
Set a voltage:
sudo i2cset -y 1 0x60 0x40 0xff 0xf0 i
sudo i2cset -y 1 0x60 0x40 0xff 0xf0 i

Revision as of 16:53, 21 March 2014

Based on the MCP4726 chip from Microchip.
http://ww1.microchip.com/downloads/en/DeviceDoc/22272C.pdf

I2C address:
1100 000 and 1100 001 OR
1100 010 and 1100 011

Set a voltage:

sudo i2cset -y 1 0x60 0x40 0xff 0xf0 i
                             ^^   ^     < Voltage bits

explanation of the arguments:

-y    don't ask confirmation
1     number of the I2C bus (0 on older raspberry pi's)
0x60  address of the DAC, use 0x61 for the other DAC. 
0x40  configuration: normal. 
0xff  high 8 bits of the value
0xf0  lower four bits of the value (in the high nibble)