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9.3
Upgrading BIOS using DOS Utility ............................................................................................................. 34
9.4
Setting the Date and Time .......................................................................................................................... 34
9.5
Boot Priority ................................................................................................................................................ 34
9.6
LED ............................................................................................................................................................. 35
9.7
Watchdog Timer ......................................................................................................................................... 35
9.8
Quiet / Quick Boot / Splash Screen ............................................................................................................ 35
9.9
Serial Port Configuration ............................................................................................................................ 35
10. Getting Started ............................................................................................................................................... 36
10.1 Development Kit Contents .......................................................................................................................... 36
10.2 Quick Setup ................................................................................................................................................ 36
10.3 Boot Device Options ................................................................................................................................... 36
10.4 Installing OS and Booting ........................................................................................................................... 37
11. Video Features ............................................................................................................................................... 38
11.1 VGA ............................................................................................................................................................ 38
11.2 LCD ............................................................................................................................................................. 38
11.2.1
Backlight............................................................................................................................................. 38
11.3 Dual Display ................................................................................................................................................ 38
11.4 Changing LCD Resolution .......................................................................................................................... 39
11.4.1
Step 1: Modify the VBIOS file ............................................................................................................ 39
11.4.2
Step 2: Integrate the VBIOS with the BIOS file ................................................................................. 41
12. Serial Ports and System Console ................................................................................................................ 43
12.1 Overview ..................................................................................................................................................... 43
12.2 Configuration .............................................................................................................................................. 43
12.3 Console redirection ..................................................................................................................................... 43
13. MASS STORAGE ............................................................................................................................................ 44
13.1 Flashdisk Models and Capacities ............................................................................................................... 44
13.2 Installation and Configuration ..................................................................................................................... 44
14. Utility Connector Features ............................................................................................................................ 45
14.1 I2C .............................................................................................................................................................. 45
14.2 Reset .......................................................................................................................................................... 45
14.3 Gigabit Ethernet LED Signals ..................................................................................................................... 45
14.4 Power and Ground ..................................................................................................................................... 45
15. A Model Data Acquisition Circuit ................................................................................................................. 46
15.1 Features ...................................................................................................................................................... 46
15.2 Block Diagram ............................................................................................................................................ 47
15.3 Analog-to-Digital Circuit .............................................................................................................................. 47
15.3.1
A/D Circuit Overview .......................................................................................................................... 47
15.3.2
A/D Channel Selection, Sampling, and Timing .................................................................................. 48
15.3.3
A/D FIFO and High Speed Sampling ................................................................................................. 48
15.3.4
A/D Operation .................................................................................................................................... 49
15.3.5
A/D Resolution ................................................................................................................................... 49
15.3.6
Input Range Selection ........................................................................................................................ 50
15.3.7
Converting A/D Readings to Volts or Engineering Units ................................................................... 50
15.3.8
Measurement Accuracy and Calibration ............................................................................................ 51
15.3.9
Input Impedance ................................................................................................................................ 51
15.4 Digital-to-Analog Circuit .............................................................................................................................. 52
15.4.1
Overview ............................................................................................................................................ 52
15.4.2
D/A Resolution ................................................................................................................................... 52
15.4.3
Output Range Selection ..................................................................................................................... 52
15.4.4
D/A Conversion Formula .................................................................................................................... 53
15.4.5
Output Accuracy and Calibration ....................................................................................................... 53
15.5 Digital I/O Features ..................................................................................................................................... 54
15.5.1
Overview ............................................................................................................................................ 54
15.5.2
Edge Detection Circuit ....................................................................................................................... 54
15.5.3
Support for Special Functions ............................................................................................................ 55
15.5.4
Power Pins ......................................................................................................................................... 55
15.6 Counter/Timer Features ............................................................................................................................. 55
15.6.1
Overview ............................................................................................................................................ 55
15.6.2
Counter Commands ........................................................................................................................... 56
15.6.3
Counter I/O Signals ............................................................................................................................ 56
15.6.4
Counter Advanced Features .............................................................................................................. 56
15.7 Pulse Width Modulator Features ................................................................................................................ 57
Helix User Manual Revision A.02
www.diamondsystems.com
Page 3
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