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Handle a network device’s interrupts on a specific interface.

Files

net_bsp.c

Prototype

Note that since NetDev_ISR_Handler() is accessed only by function pointer usually via an interrupt vector table, it doesn’t need to be globally available and should therefore be declared as ‘static’.

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Each network device’s interrupt, or set of device interrupts, must be handled by a unique BSP-level interrupt service routine (ISR) handler, NetDev_WiFi_ISR_Handler(), which maps each specific device interrupt to its corresponding network interface ISR handler, NetIF_ISR_Handler(). For some CPUs this may be a first- or second-level interrupt handler. Generally, the application must configure the interrupt controller to call every network device’s unique NetDev_WiFi_ISR_Handler() when the device’s interrupt occurs (see function NetDev_WiFi_IntCtrl). Every unique NetDev_WiFi_ISR_Handler() must then perform the following actions:

• 1 Call NetIF_ISR_Handler() with the device’s unique network interface number and appropriate interrupt type. The device’s network interface number should be available after configuration in the device’s NetDev_WiFi_CfgIntCtrl() function (see function NetDev_WiFi_IntCtrl). NetIF_ISR_Handler() in turn calls the appropriate device driver’s interrupt handler.

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See also function NetIF_ISR_Handler ”.

• 2 Clear the device’s interrupt source, possibly via an external or CPU-integrated interrupt controller source.

Since each network device requires a unique NetDev_WiFi_ISR_Handler() for each device interrupt, it is recommended that each device’s NetDev_WiFi_ISR_Handler() function be named using the following convention:

NetDev_WiFi_[Device]ISR_Handler[Type][Number]()

[Device]

Network device name or type, e.g., RS9110 (optional if the development board does not support multiple devices)

[Type]

Network device interrupt type, e.g., receive interrupt (optional if interrupt type is generic or unknown)

[Number]

Network device number for each specific instance of device (optional if the development board does not support multiple instances of a specific device)

For example, the receive ISR handler for the #2 RS9110 wireless device on an Atmel AT91SAM9263-EK should be named NetDev_WiFi_RS9110_ISR_HandlerRx2().

See also section Network Board Support Package.

ExampleS

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Examples