Intel Agilex, Configuration User Manual, Page: 137 / 196

Command Code
(Hex)
Command
Length
(9)
Response
Length
(9)
Description
8 Current image retry
counter
Count of the number of retries that have been attempted
for the current image. The counter is 0 initially. The
counter is set to 1 after the first retry, then 2 after a
second retry.
Specify the maximum number of retries in your Intel
Quartus Prime Settings File (
.qsf
). The command is:
set_global_assignment -name
RSU_MAX_RETRY_COUNT 3
. Valid values for the
MAX_RETRY
counter are 1-3. The actual number of
available retries is
MAX_RETRY -1
This field was added in version 19.3 of the Intel Quartus
Prime Pro Edition Software.
QSPI_OPEN
32 0 1 Requests exclusive access to the quad SPI. The SDM accepts the request if the quad SPI is not in
use and the SDM is not configuring the device. Returns OK if the SDM grants access. Returns the
ALT_SDM_MBOX_RESP_DEVICE_BUSY
when the quad SPI flash is busy.
Note: The SDM grants exclusive access to the client using this mailbox. Other clients cannot
access the quad SPI until the active client relinquishes access using the
QSPI_CLOSE
command.
QSPI_CLOSE
33 0 1 Closes the exclusive access to the quad SPI interface.
QSPI_SET_CS
34 1 1 Specifies one of the attached quad SPI devices via the chip select lines. Takes a one-word
argument as described below:
• Bits[31:28]: Flash device to select. The value
4'b0000
selects the flash that corresponds to
nCSO[0]
.
nCSO[0]
is the only signal that the FPGA can use to access the quad SPI flash
device. The HPS can use
nCSO[3:1]
to access HPS data.
• Bits[27:0]: Reserved (write as 0). The HPS can use
nCSO[3:1]
to access 3 additional quad
SPI devices.
This command is optional for the AS x4 configuration scheme. Is required for all other
configuration schemes.
QSPI_READ
3A 2 N Reads the attached quad SPI device. The maximum read size is 4 kilobytes (KB). Takes two
arguments:
• The quad SPI flash address (one word). The address must be word aligned. The device returns
the
0x1
error code for non-aligned addresses.
• Number of words to read (one word).
continued...
(9)
This number does not include the command and response header.
4. Remote System Update (RSU)
UG-20205 | 2019.10.09
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Intel
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Agilex
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Configuration User Guide
137