drivers/ft5x06: use a pointer to config parameters instead of copying them #19866
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gschorcht
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Type: enhancement
benpicco
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State: waiting for other PR
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This needs a rebase |
There is no need to copy the configuration parameter set to the device descriptor. A const pointer to the configuration parameter set in ROM is sufficient. It saves some 16 byte of RAM.
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Aug 23, 2023
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Aug 27, 2023
19867: drivers/ft5x06: introduce conversion for X and Y coordinates r=aabadie a=gschorcht ### Contribution description This PR provides the parameter option to define how the X and Y coordinates have to be converted. To get coordinates from the touch panel that correspond to the display coordinates, it is often necessary to convert the coordinates from the touch pannel by swapping and mirroring them. For the sake of simplicity, possible rotations are additionally defined. The PR includes PRs #19860 and #19866 to be compilable. ### Testing procedure `tests/pkg/lvgl_touch` should still work for the `stm32f746g-disco` board. ``` BOARD=stm32f746g-disco make -C tests/pkg/lvgl_touch ``` ### Issues/PRs references ~Depends on PR #19860~ Depends on PR #19866 Co-authored-by: Gunar Schorcht <gunar@schorcht.net>
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Contribution description
There is no need to copy the configuration parameter set to the device descriptor. A const pointer to the configuration parameter set in ROM is sufficient. It saves 16 byte of RAM.
Includes PR #19860 for the moment to be compilable.
Testing procedure
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with and w/o this PR and compare the sizes.
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With the PR the sizes are:
Issues/PRs references
Depends on PR #19860