Chapter 9 Direct memory access operation 59
Using DMA transfer with the PCL-818L
DMA transfer is a powerful but complicated operation. Different
parts of the DMA transfer have been covered in other parts of this
manual, especially Chapter 5. The following steps summarize how to
use DMA transfer with the PCL-818L:
1. When you configure your hardware, check your to see which (if
any) PC DMA channel is available (level 1 or level 3) and set
PCL-818L jumper JP1 accordingly.
2. If you will be using the PCL-818L driver for your DMA transfer
programming, see the Software Drivers User’s Manual for
information.
3. If you choose to conduct your own DMA operation, you will need
to have a solid understanding of the PC, 8237 DMA controller
and the PCL-818L. Make sure you perform the following steps in
your DMA transfer:
a. Initialize 8237 DMA controller register and page register.
b. Send DMA enable and trigger source data to the PCL-818L
control register located at address BASE+9.
c. Set an external trigger pulse or pacer trigger rate.
d. Enable the trigger source to start the A/D conversion
Summary of Contents for PCL-818L
Page 1: ...PCL 818L High performance DAS card with programmable gain ...
Page 5: ...Chapter 1 General information 1 1 General information C H A P T E R ...
Page 13: ...Chapter 2 Installation 9 C H A P T E R 2 Installation ...
Page 25: ...Chapter 3 Signal connections 21 3 Signal connections C H A P T E R ...
Page 31: ...Chapter 4 Register structure and format 27 4 Register structure and format C H A P T E R ...
Page 41: ...Chapter 5 A D conversion 37 C H A P T E R 5 A D conversion ...
Page 47: ...Chapter 6 D A conversion 43 6 D A conversion C H A P T E R ...
Page 50: ...46 PCL 818L User s Manual ...
Page 51: ...Chapter 7 Digital input and output 47 7 Digital input and output C H A P T E R ...
Page 53: ...Chapter 8 Programmable counter timer 49 8 Programmable timer counter C H A P T E R ...
Page 61: ...Chapter 9 Direct memory access operation 57 9 Direct memory access operation C H A P T E R ...
Page 64: ...60 PCL 818L User s Manual ...
Page 65: ......
Page 68: ...Appendix C PC I O port address map 65 C PC I O port address map A P P E N D I X ...
Page 70: ...Appendix D Calibration 67 D Calibration A P P E N D I X ...
Page 73: ...70 PCL 818L User s Manual ...
Page 75: ...2 PCL 818L User s Manual ...