Visible to Intel only — GUID: iga1444170754058
Ixiasoft
Visible to Intel only — GUID: iga1444170754058
Ixiasoft
13.4.1.1.1. Interrupt Mode
The figure below is an example of a design using the Intel FPGA Avalon® Mailbox (simple) in interrupt mode. The sender CPU(1) will initiate a transfer of the message to the receiver CPU(2) by writing the command data to the Command register through Mailbox 1. The Command register will send a message pending interrupt to the receiver. The message pending interrupt is connected to the receiver CPU(2)'s IRQ to notify that a message has arrived. Once the Command register in Mailbox 1 is read, the message pending interrupt is cleared and the message is processed. On the sender CPU(1) side, once the message is read, a message sender interrupt will be flagged signaling that Mailbox 1 is free to transmit another message.