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update FW image creation instructions

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marqs 2026-02-02 22:42:13 +02:00
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README.md
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@ -111,12 +111,16 @@ cd tools && gcc create_fw_img.c -o create_fw_img
~~~~ ~~~~
where where
* \<rbf\> is RBF format bitstream file (typically ../output_files/ossc.rbf) * \<rbf\> is RBF format bitstream file (typically ../output_files/ossc.rbf)
* \<sw_image\> is SW image binary (typically ../output_files/ossc.rbf) * \<sw_image\> is SW image binary (typically ../software/sys_controller/mem_init/flash.bin)
* \<offset\> is target offset for the SW image binary (typically 0x50000) * \<offset\> is relative offset for the SW image binary
* \<version\> is version string (e.g. 1.20) * \<version\> is version string (e.g. 1.20)
* \[version_suffix\] is optional max. 8 character suffix name (e.g. "mytest") * \[version_suffix\] is optional max. 8 character suffix name (e.g. "mytest")
The command creates ossc_\<version\>-\<version_suffix\>.bin which can be copied to fw folder of SD card. A secondary FW (identified by specific key in header) gets automatically installed at flash address 0x00080000. The primary firmware has FPGA bitstream at offset 0x0 and SW image at 0x50000 so the command is typically as follows:
~~~~
./create_fw_img ../output_files/ossc.rbf ../software/sys_controller/mem_init/flash.bin 0x50000 1.21 mytest
~~~~
The command creates ossc_\<version\>-\<version_suffix\>.bin which can be copied to fw folder of SD card. A secondary FW (identified by specific key in header) gets automatically installed at flash base address 0x00080000.
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