101-0359 Rabbit Semiconductor, 101-0359 Datasheet - Page 40

• Manufacturer Part Number: 101-0359
• Description: KIT DEVELOPMENT BASIC RABBIT2000
• Manufacturer: Rabbit Semiconductor
• Series: RabbitCore 2000r
• Type: MPU Moduler

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

The output value is set using the following function.
Effect of Interrupts on Analog I/O
The stability of the voltage output (and hence the voltage input determination as well)
depends on the ability of the driver to respond quickly to interrupt requests. Dynamic C
debugging, use of the
pulse-width modulation utilized by the driver and cause fluctuations in the voltage out-
puts. Avoid using serial communications or
program where the voltage must remain steady. Also be aware that debugging and running
Dynamic C in polling mode will cause fluctuations. Finally, be certain to disable the PWM
drivers by setting the output values to 0 or 1024 when you are done using them to free up
the CPU.
Calibration of Values to Voltages
The analog output channels on the BL1810 can be more accurately calibrated for each
individual BL1810 in the following manner (calibration of DA0 is assumed in this exam-
ple, calibration of DA1 would proceed similarly):
• Set desired channel output to
• Measure voltage V
• Set desired channel output to
• Measure voltage V
• A linear relation between input value and voltage can now be calculated:
36
void anaOut(int channel, int value);
sets the state of an analog output channel.
jrioInit
channel
value
NOTE: See the sample program JRIOTEST.C for examples of using the anaOut func-
tion.
is an integer from 0–1024 that corresponds to an output voltage as shown in Table 2.
Table 2. Typical Analog Output Voltages Corresponding
Channel
is the output channel number (0 or 1 on the BL1810).
must be called first.
DA0
DA1
min
max
printf
on DA0.
on DA0.
0.004 V
0.08 V
to Values in anaOut Function
0
function, or any serial communications can disrupt the
PWM_MIN
PWM_MAX0
PWM_MIN
0.08 V
0.63 V
.
.
printf
PWM_MAX
statements during portions of your
2.875 V
3.6 V
Rabbit 2000 Development Kit
1024
3.4 V
3.6 V