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DM400
User Manuals: Real Time Devices DM400 I/O Systems
Manuals and User Guides for Real Time Devices DM400 I/O Systems. We have
1
Real Time Devices DM400 I/O Systems manual available for free PDF download: User Manual
Real Time Devices
DM400
User Manual
Real Time Devices DM400 User Manual (135 pages)
Brand:
Real Time Devices
| Category:
I/O Systems
| Size: 5 MB
Table of Contents
Table of Contents
5
Chapter 1 - Module Settings
17
Factory-Configured Switch and Jumper Settings
19
P3 - 8254 Timer/Counter Sources (Factory Settings: See Table L-1 & Figure
20
P5 - DMA Request/Dma Acknowledge Channel (Factory Setting: Disabled
22
P6 - Analog Input Voltage Range and Polarity (Factory Setting: T5 Volts)
23
P8 - DAC I Output Voltage Range (Factory Setting: +5 to -5 Volts)
23
P9 - DAC 2 Output Voltage Range (Factory Setting: +5 to -5 Volts)
23
Gx, Resistor
27
Chapter2 -Installation
29
Connecting the Analog Input Pins
32
Connecting the Analog Outputs (2 Module)
34
Connecting the Timer/Counters and Digital VO
34
Running the 540ODIAG Diagnostics Program
34
Chapter 3 _ Hardware Description
35
Digital VO, Progmmmable Peripheral Interface
39
Chapter 4 - Modtile Operation and Programming
41
BA + 3: Scan/Burst @Ead/Lvrite)
45
BA + 4: PPI Port a - Digital VO (Readavrite)
45
BA + 6: PPI Port C - Digital VO (Read/Write)
46
BA + 7: 8255 PPI Control Word (Write Only)
46
BA + 8: 8254 Timer/Counter 0 (Read/Lvrite)
48
BA + L0: 8254 Timer/Counter 2 @Ead/Write)
48
BA + 13: D/A Converter I MSB (Write Only)
49
BA + 14: Clear IRQ Status/D/A Converter 2 LSB (Read/Write)
49
Clearing and Setting Bits in a Port
50
Enabling and Disabling the External Trigger
53
Enabling and Disabling Intemrpts
53
Starting an A./D Conversion
55
Monitoring Conversion Status (DMA Done or End-Of-Convert)
55
Reading the Converted Data
56
Programming the Pacer Clock
57
What Exactly Happens When an Intemrpt Occurs
58
Using Interrupts in Your Programs
59
Writing an Intemrpt Service Routine (ISR)
59
Restoring the Startup IMR and Intemrpt Vector
61
Common Interrupt Mistakes
61
Data Transfers Using
61
Choosing a DMA Channel
61
Allocating Adma Buffer
61
Calculating the Page and Offset of a Buffer
62
Setting the DMA
63
DMA Mode
65
Programming the DMA Controller
65
Programming the 400/5400 for DMA
65
Monitoring for DMA Done
65
Commondmaproblems
66
Example Programs and Flow Diagrams
69
Single Convert Flow Diagram (Figure 4-8)
71
DMA Flow Diagram @Gure 4-9)
72
Interrupts Flow Diagram (Figure 4-10)
73
D/A Conversion Flow Diagram (Figure 4-11)
74
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