AMC 68VZ328 D4

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D4 Application Note 5

Using Analog and Digital I/O with the

IOdimm

June 30, 2003 Version 0.1

Author: Bernice Lau

Introduction

The IOdimm is designed to support dedicated analog and digital I/O. There are 8 analog inputs, 2 analog

outputs, 8 digital inputs and 4 digital outputs. All of these I/O channels are accessible from the dimmPCI

backplane. User-space programs interact with the I/O channels through a device driver using standard system

calls.

Requirements

•dimmPCI passive backplane

•IOdimm 2.0 or higher

•SDK 2.05 or higher (2.0.38 or higher kernel source and filesystem)

•sample programs in SDK /opt/samples/card_specific/iodimm

ofir.c

oxor_iodimm.c

oeven_parity_iodimm.c

Kernel and Filesystem Configuration

The uClinux 2.0 kernel must have the IOdimm SPI option compiled for proper operation. These options will be

set using the kernel configuration

cd /opt/uClinux/linux

make menuconfig

Using this main menu, under Platform dependent setup the following options must be selected

SPI support for IOdimm

ADC MAX1203

Contents

Main Copyright notice Contact Information dimmPCITM Software Development Kit NETdimm Developers Kit Quick Start Guide Page Page Page Introduction Launching Linux at the embedded Page Whats on the CD? System Requirements Page dimmPCI uC68VZ328 Embedded Microcontroller Features General Description CPU Module Description Backplane Description Architecture NETdimm Figure 1. CPU Architecture Figure 2. Backplane Architecture The MCU Core System Memory Memory Map I/O Memory FLASH ROM Page SDRAM Ethernet Controller Page Digital I/O IOdimm Page Page Page Figure 7.6 Digital to Analog Converter Schematic Figure 7.7 IOdimm Signals RS-232 Watchdog Page SPI LCD Interface dimmPCITM Signal Descriptions Figure 10. dimmPCITM signals for System Slot PCI Electrical Characteristics Maximum Ratings Page uClinux Installation Installing the dimmPCITM System Builder Kit Installation Configuring and compiling the Clinux kernel Creating a ROM image Customizing the filesystem Accessing your dimmPCI development board via the serial port Accessing the Network Accessing your dimmPCI development board via telnet Compiling your own source code Using NFS to streamline the development cycle Page Updating Applications on your dimmPCI module Page Programming Mode Programming the uC68VZ328 Page Page Page Page Page A Sample Code Page Page Page Page Page B The Journalling Flash File System Page Page Page C Development Tool Chains Page Page Page Application Note 1 Using Digital I/O with dimmPCI Modules D1 Kernel and Filesystem Configuration Using this main menu, under Character Devices the following must be selected Kernel and Filesystem Configuration Flow Chart Available Digital I/O Pins www.amctechcorp.com 67 Table 1: List of all available digital I/O pins 68 www.amctechcorp.com Programming Structure Digital I/O Functions Page Page NOTE A: Creating a node for the character device Page Page D2 Configuring dimmPCI Modules for Communication Abstract Requirements Kernel Configuration Page Page Filesystem Configuration Page Filesystem Configuration Flow Chart Host machine Configuration Testing Page Page D3 Using Multiple NETdimm Modules Simple Server & Client T Inetd based Server & Client Page Page D4 Using Analog and Digital I/O with the IOdimm Requirements Kernel and Filesystem Configuration Page Kernel and Filesystem Configuration Flow Chart Available I/O Pins I/O Functions () () ( ) () ()() () ( ) () in0 in1 in2 out0 out1 Page Page Page D5 Using Oops Purpose & basic format of files for oops Upload & Flash Upload & Run o Download o Common oops program arguments Appendix Page E Licensing, Copyrights & Liability dimmPCITM Software Development Kit Distribution GNU GENERAL PUBLIC LICENSE Page Page Page Page Page dimmPCITM Software Development Kit