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- HP (Hewlett-Packard)
- PCI-9111DG/HR
- User's Guide
Pacer Trigger Source. HP (Hewlett-Packard) NuDAQ PCI-9111HR, PCI-9111DG/HR
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4.6.2 Pacer Trigger Source
The timer #1 and timer #2 are cascaded together to generate the timer pacer trigger of A/D conversion. The frequency of the pacer trigger is software controllable. The maximum pacer signal rate is 2MHz/4=500K which excess the maximum A/D conversion rate of the PCI-9111. The minimum signal rate is 2MHz/65535/65535, which is a very slow frequency that user may never use it. The output of the programmable timer can be used as pacer interrupt source or the timer pacer trigger source of A/D conversion. In software library, the timer #1 and #2 are always set as mode 3 (rate generator).
4.6.3 Pre-Trigger Counter
The timer #0 is used as the pre-trigger counter. The clock source of counter 0 is from A/D trigger source so that 8254 can count the A/D trigger numbers after the pre-trigger signal (pin-12 of CN3) is inserted. The gate control is set when the pre-trigger signal is change from ‘H’ to ‘L’, and cleared when the counter is counting down to zero. In software library, the timer #0 is always set as mode 0 (event counter).
4.6.4 I/O Address
The 8254 in the PCI-9111 occupy 4 I/O address as shown below.
BASE + 40 h
BASE + 42 h
BASE + 44 h
BASE + 46 h
LSB OR MSB OF COUNTER 0
LSB OR MSB OF COUNTER 1
LSB OR MSB OF COUNTER 2
CONTROL BYTE
The programming of 8254 is controlled by the registers BASE+0 to
BASE+3. Users can refer to 82C54 data sheet for the descriptions about all the features of 82C54. You can download the data sheet on the following web site:
“http://support.intel.com/support/controllers/peripheral/231164.htm” or “http://www.tundra.com/”
Operation Theorem • 35
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Table of contents
- 11 Features
- 12 Applications
- 12 Specifications
- 14 Software Supporting
- 14 Programming Library
- 15 Driver
- 15 PCIS-VEE: HP-VEE Driver
- 15 : ActiveX Controls
- 15 driver
- 16 Driver
- 16 PCIS-OPC: OPC Server
- 17 What You Have
- 17 Unpacking
- 18 PCI-9111's Layout
- 19 Jumper Descriptions
- 19 Hardware Installation Outline
- 20 Device Installation for Windows Systems
- 20 Connectors Pin Assignment
- 22 Daughter Board Connection
- 22 Connect with ACLD
- 22 Connect with ACLD-9138 and ACLD
- 23 PCI PnP Registers
- 24 I/O Address Map
- 24 A/D Data Registers
- 25 A/D Channel Control Register
- 26 A/D Channel Read Back Register
- 26 A/D Input Signal Range Control Register
- 27 A/D Range and Status Readback Register
- 27 A/D Trigger Mode Control Register
- 28 Software Trigger Register
- 28 Interrupt Control Register
- 29 Hardware Interrupt Clear Register
- 29 A/D Mode & Interrupt Control Read Back Register
- 30 Extended I/O Ports
- 30 Digital I/O register
- 31 D/A Output Register
- 31 Timer/Counter Register
- 32 A/D Conversion
- 33 A/D Conversion Procedure
- 33 A/D Signal Source Control
- 35 A/D Trigger Source Control
- 36 A/D Data Transfer Modes
- 38 Pre-Trigger Control
- 40 A/D Data Format
- 41 Interrupt Control
- 41 System Architecture
- 41 IRQ Level Setting
- 41 Dual Interrupt System
- 42 Interrupt Source Control
- 42 Extended Digital I/O Port
- 43 D/A Conversion
- 44 Digital Input and Output
- 44 Timer/Counter Operation
- 44 Introduction
- 45 Pacer Trigger Source
- 45 Pre-Trigger Counter
- 45 I/O Address
- 46 Libraries Installation
- 47 Programming Guide
- 47 Naming Convention
- 47 Data Types
- 48 _9111_Initial
- 48 _9111_DO
- 49 _9111_DO_Channel
- 49 _9111_DI
- 50 _9111_DI_Channel
- 50 _9111_EDI
- 51 _9111_EDO
- 51 _9111_EDO_Read_Back
- 52 _9111_Set_EDO_Function
- 53 _9111_DA
- 53 _9111_AD_Read_Data
- 54 _9111_AD_Read_Data_Repeat
- 54 _9111_AD_Set_Channel
- 55 _9111_AD_Get_Channel
- 56 _9111_AD_Set_Range
- 57 _9111_AD_Get_Range
- 57 _9111_AD_Get_Status
- 58 _9111_AD_Set_Mode
- 59 _9111_AD_Get_Mode
- 59 _9111_INT_Set_Reg
- 60 _9111_INT_Get_Reg
- 60 _9111_Reset_FIFO
- 61 _9111_AD_Soft_Trigger
- 61 _9111_Set
- 62 _9111_Get
- 62 _9111_AD_Timer
- 63 _9111_Counter_Start
- 63 _9111_Counter_Read
- 64 _9111_Counter_Stop
- 65 _9111_INT_Source_Control
- 66 _9111_CLR_IRQ
- 66 _9111_Get_IRQ_Channel
- 67 _9111_Get_IRQ_Status
- 67 _9111_AD_FFHF_Polling
- 68 _9111_AD_Aquire
- 68 _9111_AD_HR_Aquire
- 69 _9111_AD_INT_Start
- 70 _9111_AD_FFHF_INT_Start
- 72 _9111_AD_INT_Status
- 72 _9111_AD_FFHF_INT_Status
- 73 _9111_AD_FFHF_INT_Restart
- 74 _9111_AD_INT_Stop
- 75 What do you need
- 76 VR Assignment
- 76 A/D Adjustment
- 77 D/A Adjustment
- 77 Unipolar Analog Output
- 77 Bipolar Analog Output
- 78 9111util
- 78 Running 9111util.exe
- 79 System Configuration
- 80 Calibration
- 81 Functional Testing
- 82 I_EEPROM