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Technical Support
On-Line Manuals
RL-ARM User's Guide (MDK v4)
RL-RTX
RL-FlashFS
RL-TCPnet
RL-CAN
RL-USB
RL-USB for USB Device Applications
RL-USB Device Library
RL-USB Device Features
RL-USB Device Software Stack
RL-USB Device Functions
RL-USB Device Source Files
RL-USB Device Configuration
Audio Device (ADC) Options
Communication Device (CDC) - ACM Options
Human Interface Device (HID) Options
Mass Storage Device (MSC) Options
Create USB Device Applications
Create ADC Applications
Create CDC ACM Applications
Create HID Applications
Create MSC Applications
Create Composite Applications
Test USB Device Applications
Compliance Tests
Test HID Client Application
RL-USB for USB Host Applications
RL-USB Host Library
RL-USB Host Features
RL-USB Host Software Stack
RL-USB Host Functions
RL-USB Host Source Files
RL-USB Host Configuration
Host Controller Driver Selection
Host Controller Driver Configuration
Host Class Driver Selection
Create USB Host Applications
Create USB Host HID Applications
HID_Kbd Example
Create USB Host MSC Applications
Create USB Host Class Driver
RL-USB Host Constants and Structures
Error constants
Speed constants
Transaction Packet Type constants
Transaction Error Type constants
USB Request Block structure (USBH_URB)
Endpoint structure (USBH_EP)
Driver Capabilites structure (USBH_HCI_CAP)
Device Class Instance structure (USBH_DCI)
Host Controller Instance structure (USBH_HCI)
Host Controller Driver structure (USBH_HCD)
USB Concepts
USB Transfer Rates
USB Network
Basic Communication Model
USB Protocol
Control Transfer
Interrupt Transfer
Isochronous Transfer
Bulk Transfer
Descriptors
Device Configuration
Device Descriptor
Configuration Descriptor
Interface Descriptor
Endpoint Descriptor
Device Qualifier Descriptor
Example Programs
Library Reference
Appendix
RL-USB Host Software Stack
The RL-USB Host Software Stack consists of the following layers:
- USB Host Class Driver
- USB Host Core
- USB Host Controller Driver
The USB Host Class Driver is a hardware independent layer containing functions that are class specific and application dependent. The following USB classes are supported:
- Human Interface Device (HID)
- Mass Storage Device (MSC)
The USB Host Core is a hardware independent layer and contains the functions to manage USB peripherals and the USB bus. This layer is an interface between the USB Host Controller Driver and the USB Host Class Driver. The most important functions in this layer are:
- usbh_init() which initializes the USB Host.
- usbh_engine() which enables the USB Host Core to react to USB bus events. This function must be called periodically from the main application.
The USB Host Controller Driver is the layer between the USB Host Controller Hardware and the USB Host Core. This layer handles hardware specific interfaces. Two types of USB Host Controller Drivers are available:
- The USB Host Controller Driver for custom EHCI for NXP Devices is packed in the library, whereas the USB Host Controller Hardware Driver is delivered as a source module. However, the two parts are used as an entity by devices having custom EHCI for NXP Devices USB Host Controllers.
- The USB Host Controller Driver for OHCI is packed in the library, whereas the USB Host Controller Hardware Driver is delivered as a source module. However, the two parts are used as an entity by devices having OHCI USB Host Controllers.
- The USB Host Controller Driver and Hardware Driver for Custom USB Host Controller is delivered as source module and is included for devices that do not support the USB OHCI standard (this is not referring to EHCI).
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