SPRUJ79 November 2024 F29H850TU , F29H859TU-Q1
Figure 35-8 shows how the ESC and ESC subsystem connects to the local host subsystem. The local host subsystem can include the CPU (CPU1 or ) of the device and the RTDMA engine as the bus controller accessing the ESC. This local host subsystem is acting upon the commands that are sent by the EtherCAT MainDevice in the form of EtherCAT datagrams.
The 16-bit asynchronous interface and the interrupt request line are the main channels through which the local host subsystem interacts with the ESC. The interrupt request line can be used to trigger actions based on ESC internal events, exception conditions or time synchronized events. The RTDMA engine is used to transfer the contents from the process data memory to system RAM on any of these events. The user application needs to select the events that act as interrupts or RTDMA requests. The mask and clear events for the interrupt causes are configured to be accessed by the CPU/Co-processor that is controlling the ESC.
Figure 35-8 Interaction of ESCSS with the
CPU Subsystem