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Altera_Forum's avatar
Altera_Forum
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13 years ago

FPGA remote upgrade question

Hello, I'm designing a PCB with a Cyclone IV FPGA on it. It will connect to another board with a CPU via an SPI bus. I need to enable a remote upgrade of the FPGA image by the CPU. I read the Conf...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Is your configuration flash an EPCS chip? If yes then it is just a SPI flash, so you need to provide a way for your CPU to access it as an SPI device, or put your own SPI master IP in the FPGA, master that will be controlled by your CPU.

The remote system upgrade component isn't used to change the contents of the configuration device, but just to trigger a reconfiguration request to the FPGA (i.e. ask the FPGA to load a new configuration from the flash).