5.6.6. Removing an Application Image
1.
Set up exclusive access to the AS x4 interface and flash memory by running the QSPI_OPEN and QSPI_SET_CS
commands in the Tcl Console window. You now have exclusive access to the AS x4 interface and flash until you relinquish
access by running the QSPI_CLOSE command. Write the new application image to the flash memory using the
QSPI_WRITE command.
2.
Write 0x00000000 to the application image start address stored in the image pointer entry of the configuration firmware
pointer block (CPB0 and CPB1) using the QSPI_WRITE command.
Note: You must update both copies (copy0 and copy1) when editing the configuration firmware pointer block and sub-
partition table.
3.
Erase the application image content in the flash memory using the QSPI_ERASE command.
4. To remove a new application image, add another new application image in the next or subsequent image pointer entry or
allow the device to fall back to the previous or secondary application image in your application image list. The following
table shows correct entries for image pointer entries for CPB0 and CPB1 for offsets 0x20 and 0x28 :
Table 52. Configuration Firmware Pointer Block Contents
CPB Start Address + 0x20
Content Value
CPB0 + 0x20 = 0x004A0020
Old application image pointer entry (lower priority)
0x004B000
CPB0 + 0x28 = 0x004A0028
Current/new application image pointer entry
(highest priority)
0x02000000
CPB1 + 0x20 = 0x004A8020
Old application image pointer entry (lower priority)
0x004B0000
CPB1 + 0x28 = 0x004A8028
Current/New application image pointer entry
(highest priority)
0x02000000
Figure 86. Read Current CPB Values
% qspi_read 0x004A0020 1
0x004B0000
% qspi_read 0x004A0028 1
0x02000000
% qspi_read 0x004A8020 1
0x004B0000
% qspi_read 0x004A8028 1
0x02000000
5. Remote System Update (RSU)
683673 | 2021.10.29
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