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update README files for CPLD SRAM loading

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This commit is contained in:
Michael Ossmann
2021-03-17 21:57:35 -06:00
parent 2a8ed4ec59
commit becc016c35
2 changed files with 6 additions and 5 deletions
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4
firmware/README
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@ -48,7 +48,3 @@ use a known good .dfu file from a release package. Load the firmware into RAM
with: with:
$ dfu-util --device 1fc9:000c --alt 0 --download hackrf_usb.dfu $ dfu-util --device 1fc9:000c --alt 0 --download hackrf_usb.dfu
It is important to update the CPLD whenever you are updating firmware and a new
CPLD image is available. See cpld/README for instructions.

7
firmware/cpld/README
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@ -3,7 +3,12 @@ The primary CPLD image is: sgpio_if/default.xsvf
This is a binary file built from HDL source in sgpio_if. You do not need This is a binary file built from HDL source in sgpio_if. You do not need
Xilinx tools unless you want to make your own modifications. Xilinx tools unless you want to make your own modifications.
To update the CPLD, first update the firmware, libhackrf, and hackrf-tools. CPLD images are automatically included in HackRF firmware. You do not normally
need to update the bitstream stored in the CPLD's flash memory as it is
superseded by the image loaded into SRAM by the firmware.
If you want to update the bitstream in CPLD flash for some reason, first update
the firmware, libhackrf, and hackrf-tools.
Then: Then:
$ hackrf_cpldjtag -x sgpio_if/default.xsvf $ hackrf_cpldjtag -x sgpio_if/default.xsvf