CONFIG DACX

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Action

This statement configures the DAC0 or DACX in the Xtiny/Megax/AVRX.

 

 

Syntax

CONFIG DACx=dac, IO0=IO0,  RUNMODE=runmode, OUT_ENABLE =out

 

 

Remarks

DACX

Chose either DAC0 or DACX.

dac

ENABLED or DISABLED. Chose ENABLED to enable the DAC.

runmode

Possible values :

ENABLED : In Standby sleep mode, the peripheral continues operation

DISABLED : In Standby sleep mode, the peripheral is halted

Out

ENABLED or DISABLED. Chose ENABLED to enable the output. This will also set PORTA.6 to output mode.

Notice that only DAC0 has the ability to drive an output pin.

The output pin varies per processor. The compiler will use the proper pin.

 

The DAC data register is available in the byte variable DAC0_DATA.

When present, the register names for DAC1 and DAC2 are : DAC1_DATA and DAC2_DATA.

 

 

 

Example

 

'--------------------------------------------------------------------------------
'name                     : dac.bas
'copyright                : (c) 1995-2021, MCS Electronics
'purpose                  : demonstrates DAC
'micro                    : xtiny816
'suited for demo          : no
'commercial addon needed  : yes
'--------------------------------------------------------------------------------
$regfile = "atXtiny816.dat"
$crystal = 20000000
$hwstack = 16
$swstack = 16
$framesize = 24
 
'set the system clock and prescaler
Config Sysclock = 20mhz , Prescale = 1
 
'configure the USART
Config Com1 = 19200 , Mode = Asynchroneous , Parity = None , Databits = 8 , Stopbits = 1
 
'configure the internal reference to be 1v1 for both the ADC and the DAC
Config Vref = Dummy , Adc0 = 1v1 , Dac0 = 1v1
 
'configure the DAC. We also drive the PA6 output pin
Config Dac0 = Enabled , Out_enable = Enabled
 
Print "Test DAC0"
 
Do
  Dac0_data = Dac0_data + 10
  Print "DAC0:" ; Dac0_data
  Waitms 100
Loop
 
End