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[Enhancement] Shrink WiFi application size by compressing BLOB #909

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earlephilhower opened this issue Jul 8, 2022 · 0 comments
Open

[Enhancement] Shrink WiFi application size by compressing BLOB #909

earlephilhower opened this issue Jul 8, 2022 · 0 comments
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@peterharperuk
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code size cyw43_driver wifi integration
Milestone
1.6.0

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@earlephilhower
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The binary WiFi blobs are 200-400KB in size, but are only used to upload to the Cyw43 WiFi chip. This makes applications grow massively (before taking in to account any add'l LWIP code).

One way to help minimize this bloat would be to compress the BLOBs and decompress them on-the-fly as they are uploaded to the Cyw43 chip.

UZLib is a simple decompressor for gzip blobs and only added ~4K of code to the ESP8266 Arduino code when it was added (it is used there to support compressed OTA).

https://github.com/pfalcon/uzlib/tree/master

A quick test shows that:

  • 220K firmware blob compressed to 138K (~40% savings)
  • 417K firmware blob compressed to 280K (~30% savings)
@kilograham kilograham added this to the 1.5.0 milestone Jul 11, 2022
@usedbytes usedbytes mentioned this issue Jul 17, 2022
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@kilograham kilograham mentioned this issue Jul 17, 2022
Closed
peterharperuk added a commit to peterharperuk/pico-sdk that referenced this issue Oct 17, 2022
@peterharperuk
Support streaming / compression of wifi firmware
a1162cf 
Fixes raspberrypi#909
@peterharperuk peterharperuk mentioned this issue Nov 22, 2022
Closed
peterharperuk added a commit to peterharperuk/pico-sdk that referenced this issue Nov 22, 2022
@peterharperuk
cyw43 firmware compression
c0b4bc4 
Add build changes needed for firmware compression. Enhance
cyw43_write_bytes to allow us to use a src pointer part way through
spid_buf which is used as a temorary buffer for firmware decompression

Depends on georgerobotics/cyw43-driver#44
Fixes raspberrypi#909
peterharperuk added a commit to peterharperuk/pico-sdk that referenced this issue Feb 16, 2023
@peterharperuk
cyw43 firmware compression
d120ec6 
Add build changes needed for firmware compression. Enhance
cyw43_write_bytes to allow us to use a src pointer part way through
spid_buf which is used as a temorary buffer for firmware decompression

Depends on georgerobotics/cyw43-driver#44
Fixes raspberrypi#909
peterharperuk added a commit to peterharperuk/pico-sdk that referenced this issue Feb 22, 2023
@peterharperuk
cyw43 firmware compression
1aa0945 
Add build changes needed for firmware compression. Enhance
cyw43_write_bytes to allow us to use a src pointer part way through
spid_buf which is used as a temorary buffer for firmware decompression

Depends on georgerobotics/cyw43-driver#44
Fixes raspberrypi#909
peterharperuk added a commit to peterharperuk/pico-sdk that referenced this issue Feb 27, 2023
@peterharperuk
cyw43 firmware compression
6d8f8d6 
Add build changes needed for firmware compression. Enhance
cyw43_write_bytes to allow us to use a src pointer part way through
spid_buf which is used as a temorary buffer for firmware decompression

Depends on georgerobotics/cyw43-driver#44
Fixes raspberrypi#909
peterharperuk added a commit to peterharperuk/pico-sdk that referenced this issue Mar 14, 2023
@peterharperuk
cyw43 firmware compression
44f9edf 
Add build changes needed for firmware compression. Enhance
cyw43_write_bytes to allow us to use a src pointer part way through
spid_buf which is used as a temorary buffer for firmware decompression

Depends on georgerobotics/cyw43-driver#44
Fixes raspberrypi#909
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code size cyw43_driver wifi integration
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1.6.0
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@earlephilhower @kilograham @peterharperuk