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DAC

Syntax​


DACsetup()

DACout(expression)

Description​


Control of the DAC is done by writing directly to the registers.  Details can be found in the User manual of the appropriate part, links in the Hardware Section .

Rather than having built in functions in BASIC, this will be done by subroutines .  Samples of those subroutines are below

Example​

On the SuperPRO:

#define
PCB_PINSEL1        *(&H4002C004)
#define PCB_PINMODE1
*(&H4002C044)

#define
DACR                     *(&H4008C000)
' or use
#include  <LPC17xx.bas>

sub
DACsetup
  PCB_PINSEL1 =
PCB_PINSEL1 and (not (3<<20)) or (2<<20)   ' enable DAC
output
  PCB_PINMODE1 = PCB_PINMODE1 or
(2<<20)
' disable pull-ups

endsub

sub DACout(value)
  DACR =
value <<              6

  endsub

main:

  DACsetup

for i=   0 to 1023

  DACout(i)

  wait(10)

    next i

On the ARMweb or DINkit:

#define  PCB_PINSEL1        *(&HE002C004)

#define
DACR                     *(&HE006C000)
' or use
#include  <LPC21xx.bas>

sub
DACsetup
  PCB_PINSEL1 =
PCB_PINSEL1 and (not (3<<18)) or (2<<18)   ' enable DAC
output

endsub

sub DACout(value)
  DACR =
value <<              6

  endsub

main:

  DACsetup

for i=

    0
to

  1023
  DACout(i)

  wait(10)

    next
i

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Differences from other BASICs​

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  • no equivalent in Visual BASIC
  • no equivalent in PBASIC

See also​

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