描述

當(dāng)PDIUSBD12向處理器發(fā)出中斷請求時，處理器讀取中斷寄存器，根據(jù)中斷源調(diào)用相應(yīng)的中斷服務(wù)處理程序，中斷服務(wù)處理程序設(shè)置相應(yīng)的事件標(biāo)志，如果有數(shù)據(jù)傳輸并作相應(yīng)的數(shù)據(jù)處理。根據(jù)USB協(xié)議[4]，控制端點0用來負(fù)責(zé)設(shè)備的枚舉，如獲取設(shè)備各種描述符、設(shè)置地址、獲取海量存儲設(shè)備的邏輯單元數(shù)目和復(fù)位設(shè)備等操作。這些操作是通過中斷和主循環(huán)共同完成的。這里端點1未用到，可以忽略其中斷。端點2是主端點，用作Bulk-Only傳輸。在端點2的中斷處理程序中實現(xiàn)Bulk-Only傳輸及命令解析和執(zhí)行。

其中，中斷服務(wù)處理程序與主循環(huán)通過一個名為ControlData的結(jié)構(gòu)體變量進(jìn)行通訊。主循環(huán)初始化I／O口、事件標(biāo)志bUSBFlags、建立包數(shù)據(jù)緩沖區(qū)、定時器和中斷，重新連接USB總線后進(jìn)入一個無限循環(huán)，當(dāng)該循環(huán)輪詢到某事件標(biāo)志被置位時便進(jìn)行相應(yīng)的處理。特別是在設(shè)備枚舉中當(dāng)建立標(biāo)志被置位時，根據(jù)設(shè)備請求的類型域ControlData，DeviceRequest，bmRequestType來確定是標(biāo)準(zhǔn)設(shè)備請求、廠商設(shè)備請求還是類型設(shè)備請求，再根據(jù)請求類

歐美品牌停產(chǎn)的，常用的“PLC”備品備件

我司產(chǎn)品應(yīng)用于以下領(lǐng)域：

1,《發(fā)電廠DCS監(jiān)控系統(tǒng)》

2,《智能平鋼化爐系統(tǒng)制造》

3,《PLC可編程輸送控制系統(tǒng)》

4,《DCS集散控制系統(tǒng)》
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5,《智能型消防供水控制系統(tǒng)》

6,《化工廠藥液恒流量計算機控制系統(tǒng)》

7,《電氣控制系統(tǒng)》造紙,印染生產(chǎn)線,變電站綜合自動化控制系列

本特利，英維思，伍德沃德，?？怂共_、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂，ACSO，力士樂等各大品牌的DCS系統(tǒng)配件，機器人系統(tǒng)配件，大型伺服系統(tǒng)備件。

CONVUM VACUUM GENERATOR,TYPE CV-20LSCK

Convum MPS-V2R-G Vacuum Sensor

PARKER/CONVUM VACUUM AIR GENERATOR CV-30AHSN

Lot/4 Convum PS-50-F Vacuum Suction Pads

1 NIB CONVUM MPS-V3RC-GHA VACUUM SENSOR MPSV3RCGHA

PARKER CONVUM VACUUM SOLENOID VALVE MC2S10HSZM24B5N

Convum Vacuum Solenoid CVA-15HS

CKD CONVUM 3/8″PORT VACUUM FILTERS VF-6

CKD CONVUM 1/4″PORT VACUUM FILTERS VF-5

Convum PF-50 Vacuum Suction Pad

CONVUM VF-5 VACCUM GENERATOR FILTER CV-15,MCA-10/13

CONVUM FILTER VF-5 MYOTOHU COMPRESSOR FILTER 1/4 NPT

Parker Convum TYS-20B-30 Bulkhead Level Compensator

Myotohu Convum CVA-15QS Vacuum Actuator

CONVUM CVK-15HRZD PRESSURE SOLENOID VALVE CONVUM

Parker Convum CV-25HSN

CONVUM CVA-15HS35GDN NSFP CVA15HS35GDN

CONVUM MYOTOHU CVT05HS

PARKER CONVUM VACUUM SOLENOID VALVE MC2S07HSZM24B5N

CONVUM CV-15HS NSFP CV15HS

Convum Pneumatic Valve Manifold CVK-15HRZD Lot of 2

CONVUM CVA-15OS USPP CVA15OS

CONVUM CVA-15QS USPP CVA15QS

DNS CONVUM SENSOR,DIGITAL 2-AE-J0043 D4M5-GHA-D4

CONVUM CV-10HSCK NSFP CV10HSCK

CONVUM VF-3 VACUUM FILTER 1/8″

Convum APS030-PNP-SA2 Vacuum Sensor

CONVUM VACUUM FILTERS VF-6

CONVUM CV-10LS USPP CV10LS

Convum Manifold Solenoid Valve CVK-15HRZD 24V MVS SMC

CONVUM CVA-10LSB NSPP CVA10LSB

PARKER CONVUM PF-120D VACUUM CUP PAD

PARKER CV15HSN CONVUM VALVE CV-15HSN 1/4 INCH 1/4″

Convum Myotoku CVK-15HRZD 24BD Pneumatic Solenoid(794)

CONVUM PRESSURE DISPLAY SWITCH MPS-71E-G-D5

Convum Parker PFYK-25-U Vacuum Suction Cups

MYOTOKY LDT.CVA-15HSA CONVUM VALVE

Parker Convum CEK27HSZC24PBLN Vacuum Pump Generator

Convum Vacuum Generator Pump CV10HSC

Convum Vacuum Generator Pump CCV10HSCK NEW

2 Convum Parker PFYK-25-SI Vacuum Suction Cups

PARKER generator CONVUM VACUUM PUMP PA244-RV3.5

MYOTOKU/CONVUM CV-10LS GENERATOR 10MM LOW VACUUM

MYOTOKU/CONVUM CV-10LS GENERATOR 10MM LOW VACUUM

CONVUM MVS-030-W NSFP MVS030W

CONVUM SENSOR,VACUUM FOR SPIN SD MPS-R3S5-GHA-D

DNS CONVUM?SENSOR,PRESSURE 2-AE-J0076 P3M5-GHA-D

CONVUM CVK-20HSABC-24B?L USPP CVK20HSABC24BL

DNS CONVUM SENSOR,DIGITAL SPI 2-AE-J0012 R3S5-GHA-D

Myotohu Convum MVS-030 Vacuum Switch

MYOTOKU/CONVUM CVF-1-10LS GENERATOR 1MM

CONVUM MPS-V2R-C NSFP MPSV2RC

CONVUM MPS-P1N-PC NSFP MPSP1NPC

DNS CONVUM PRESSURE SENSOR ASSY 2-AE-J0067 R3S5-GHA-D

CONVUM CYLINDER TKY-0-4.5X3

Convum Vacuum Switch CVA-D,CVA-10,CVA-V3B

Myotoky LTD.Model:CVA-10HR-VDN-24?B Convum Valve

4-Convum Vacuum Technology Valves CVK-15HSZC 24 VDC

MYOTOKU/CONVUM CVF-1-10HRAB/MV?S-030-AB VAC SENSOR

MYOTOKU CONVUM CVR Vacuum Switch

CONVUM CVF-2-05HS VACUUM SWITCH SOLENOID VALVE

CONVUM MPS-V2R-PGA NSPP MPSV2RPGA

Parker MPS Convum PRESSURE Switch P6N-PG(11)

Parker Convum CVX-0260-B-E0S-?DN PA244-RV3.5 Vacuum Pump

MYOTOKU/CONVUM VF-3 VACUUM FILTER

CONVUM MPS-V3RC-G-M VACUUM PRESSURE SENSOR

Parker Convum Vacuum LED Switch MPS-V2N-PC

Parker Convum CVX0260BE0SDNNA Vacume Pump PA244-RV3.5

Parker Convum MPS-R3F5-NC Stainless Pressure Sensor New

Convum CVA-DN/CVA-15HS 24BL/C-0054-CVA

Myotoku Convum F-1 Vacuum Ejector C-21-316

Convum VF-3

Convum CVA-15HR-B Vacuum Release Solenoid Valve NNB

CONVUM A QUICK RELEASE VALVE CVA-D NO.EKT(15-19)

Convum MPS-V9M-NG-YOK Sensor

Convum MC2S07HS-ZM24B5?R-8Y19 Valve w/A00SC23-Z06-028

Convum MVS-030-AB Vacuum Sensor NPN MVS030AB NIB

Parker Convum MVS-030ABP PNP Sensor MVS030ABP NIB

Convum VF-6 Pneumatic Port Vacuum Filter NIB

Convum VF-3 vacuum filter assembly 1/8″w/element