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NetDev_WiFi_SPI_Unlock

NetDev_WiFi_SPI_Unlock

Dec 10, 2020

This function is called by a device driver to release the SPI lock and give the access to the SPI bus to other device’s hardware.

Files

net_bsp.c

Prototype

static CPU_INT32U NetDev_WiFi_SPI_Unlock (NET_IF *p_if);

 

Note that since NetDev_WiFi_SPI_Unlock() is accessed only by function pointer via a BSP interface structure, it doesn’t need to be globally available and should therefore be declared as ‘static’.

Arguments

p_if

Pointer to specific interface to unlock.

Returned Value

None.

Required Configuration

None.

Notes / Warnings

  • NetDev_WiFi_SPI_Unlock must be implemented if more than one hardware device share the same SPI bus.

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

    NetDev_WiFi_[Device]SPI_Unlock[Number]()
    [Device]

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

[Number]

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

For example, the NetDev_WiFi_SPI_Unlock() function for the #2 RS9110 wireless device on an Atmel AT91SAM9263-EK should be named NetDev_WiFi_RS9110_SPI_Unlock2(), or NetDev_WiFi_RS9110_SPI_Unlock_2() with additional underscore optional.

See also section Network Board Support Package.