This section describes the hardware configurations supported by lwIP. The key components of the hardware system include:
- Processor
- Either a MicroBlaze or a Cortex-A9 or a Cortex-A53 or a Cortex-R5F processor or a Cortex-A72. The Cortex-A9 processor applies to Zynq systems. The Cortex-A53 and Cortex-R5F processors apply to Zynq UltraScale+ MPSoC systems. The Cortex-A72 and Cortex-R5F processors apply to Versal ACAP systems.
- MAC
- LwIP supports axi_ethernetlite, axi_ethernet, and Gigabit Ethernet controller and MAC (GigE) cores.
- Timer
- To maintain TCP timers, lwIP raw API based applications require that certain functions are called at periodic intervals by the application. An application can do this by registering an interrupt handler with a timer.
- DMA
- For axi_ethernet based systems, the axi_ethernet cores can be configured with a soft DMA engine (AXI DMA and MCDMA) or a FIFO interface. For GigE-based Zynq devices, Zynq UltraScale+ MPSoC, and Versal ACAP systems, there is a built-in DMA and so no extra configuration is needed. Same applies to axi_ethernetlite based systems, which have their built-in buffer management provisions.
The following figure shows a sample system architecture with a Kintex-6 device using the axi_ethernet core with DMA.
Figure 1. System Architecture using axi_ethernet core with DMA
