101-0359 Rabbit Semiconductor, 101-0359 Datasheet - Page 39
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101-0359
Manufacturer Part Number
101-0359
Description
KIT DEVELOPMENT BASIC RABBIT2000
Manufacturer
Rabbit Semiconductor
Series
RabbitCore 2000r
Type
MPU Moduler
Datasheet
1.101-0359.pdf
(54 pages)
Specifications of 101-0359
Rohs Status
RoHS non-compliant
Contents
RabbitCore Module, Dev. Board, AC Adapter, Cable and Dynamic C® CD-Rom
Processor To Be Evaluated
Rabbit 2000
Interface Type
RS-232, RS-485
For Use With/related Products
RCM2000, RCM2010, RCM2020
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
316-1003
4.2.1.3 Analog Output
The two analog output channels on the BL1810 (DA0 and DA1 on header J5) are con-
trolled by a pulse-width modulation (PWM) driver. This requires the use of some fraction
of the CPU cycles when the driver is running (up to 20% when both D/A channels are
used). A voltage is selected by giving a value from 0 to 1024 to the driver, corresponding
roughly to 0.1 V to 3.5 V on DA0. Because of the PWM interrupt frequency, the PWM
driver can provide a continuous range of voltage output in the range from 0.1 V to 3.0 V
for DA0, and 0.6 V to 3.6 V for DA1. These ranges can be specified with the constants
PWM_MIN
PWM_MIN
ting DA1 to
ues below
for DA1) will be rounded up to 1024.
The output channels can also be set in an “always on” or “always off” mode, which does
not require CPU cycles. The “always on” mode is set by requesting an output value of
1024, and will provide about 3.4 V on channel DA0, and 3.6 V on DA1. The “always off”
mode is selected by asking for a value of 0, and provides an output of around 0.1 V on
DA0 and 0.0 V on DA1.
See Table 2 for a summary of the possible analog output voltages corresponding to values
given in the
Getting Started Manual
void digOut(int channel, int value);
void digOn(int channel);
void digOff(int channel);
sets the state of a digital output bit.
sets the state of a digital output bit to on (1).
sets the state of a digital output bit to off (0).
jrioInit
channel
value
jrioInit
channel
jrioInit
channel
NOTE: See the sample program JRIOTEST.C for an example of using the digital out-
,
put functions.
will output 0.1 V, and setting it to
PWM_MIN
PWM_MAX0
is the output value (0 or 1).
PWM_MIN
anaOut
is the output channel number (0-3 on the BL1810).
is the output channel number (0–3 on the BL1810).
is the output channel number (0–3 on the BL1810).
must be called first.
must be called first.
must be called first.
will be rounded down to 0, and values above
function.
, and
will output 0.6 V, and setting it to
PWM_MAX1
. In other words, setting channel DA0 to the value
PWM_MAX0
will output 3.0 V. Similarly, set-
PWM_MAX1
PWM_MAX0
will output 3.6 V. Val-
(
PWM_MAX1
35