Echelon Mini EVK User Manual
Page 47
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devices include temperature and position sensors, valves, switches, and LED
displays. Neuron Chips and Smart Transceivers can also be connected to
other microprocessors. The Neuron firmware implements numerous I/O
objects that manage the interface to these devices for a Neuron C application.
I/O objects are discussed in detail in Chapter 2, Focusing on a Single Device, of
the Neuron C Programmer’s Guide and in the Neuron C Reference Guide.
To set up I/O, declare the I/O objects that monitor and control the Neuron
Chip or Smart Transceiver I/O pins, named IO_0 – IO_10 or IO_11
(depending on the Neuron Chip or Smart Transceiver model). To perform
I/O, you use the following built-in I/O functions: io_in(
), io_out(
),
io_set_direction(
), io_select(
), io_change_init(
), and io_set_clock(
).
The io_out_request(
) function is used to perform I/O with the parallel I/O
object.
For more information on Neuron C I/O, see the Neuron C Reference Guide and
the Echelon engineering bulletins listed in Table 4.1. These engineering
bulletins are availa
.
Table 4.1 Neuron C I/O Engineering Bulletins
Document Title
Contents
Part Number
Analog-To-Digital
Conversion With the
Neuron Chip
Describes some of the more popular analog
to digital (A/D) conversion schemes
available for use with a Smart Transceiver
or Neuron Chip. Provides schematics,
parts lists and code examples.
Driving a Seven
Segment Display with
the Neuron Chip
Describes how a Smart Transceiver or
Neuron Chip can be used to drive a seven-
segment display controller chip, the
Motorola MC14489, using the Neurowire
device. Includes Neuron C software
drivers to display decimal numbers from
binary data.
EIA-232C Serial
Interfacing with the
Neuron Chip
Describes a simple level conversion circuit
to allow a Smart Transceiver or Neuron
Chip to communicate with RS-232C
devices. Also includes Neuron C software
to drive an RS-232C CRT terminal.
Neuron Chip
Quadrature Input
Function Interface
Describes the use of the quadrature device
in a Smart Transceiver or Neuron Chip to
interface to external devices such as shaft
encoders.
Parallel I/O Interface
to the Neuron Chip
Describes hardware and software to
interface a Smart Transceiver or Neuron
Chip to a microprocessor using the parallel
I/O port.
Mini EVK User’s Guide
41