ac2f4d1789
- toolkit V2.8.0.1@14806 - BSL V1.8.0.0@14590 - tcpserver: V1.4.3.0@14676 (marshaller V2.4.0.1@14551)
1.5 KiB
Linux cifX plugin interface
The libcifx plugins allow an interface independant access to netX devices. It is based on the cifX toolkit HW function interface.
Currently a SPI sample interface is provided, which is able to work with Linux SPI devices.
The easiest way is to build the driver with SPI plugin support enabled (manual way -> build option: SPM_PLUGIN).
The driver's installation process will automatically create a plugin directory in the driver's configuration path (default: "/opt/cifx/plugins").
After the installation adapt the SPI plugin configuration (/opt/cifx/plugins/netx-spm/config0) according to your needs and run the application to access a SPI device.
| parameter | |
|---|---|
| Device | Name of the SPI device to open (e.g. /dev/spidev0.0 -> Device=spidev0.0) |
| Speed | Maximum speed to configure the driver (e.g. 25Mhz -> Speed=25000000) |
| Mode | SPI mode 0 to 3 |
| ChunkSize | Chunk size (maximum size of transfer after which a new transfer will be automatically setup in bytes). If set to 0, no transfer splitting will be executed. e.g. Split transfers in case it is larger than 250 byte => ChunkSize=250 |
| Irq | Path to irq file, e.g. /sys/class/gpio/gpio1/value |
IRQ configuration
If using GPIO-based IRQ, only edge may be available while the netX works level oriented. Therefore, the driver internal compensates this but requires the following GPIO settings:
direction=in
edge=rising
active_low=1