arch/sim: Add Mouse emulation - #19812
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acassis
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August 12, 2026 13:54
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This commit adds basic information about SIM Input support. Signed-off-by: Alan C. Assis <acassis@gmail.com>
This commit adds support for three buttons Mouse emulation on SIM. Signed-off-by: Alan C. Assis <acassis@gmail.com> Assisted-by: Claude Code
As suggested by Xiang Xiao, let's fix the identation Signed-off-by: Alan C. Assis <acassis@gmail.com>
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@ppisa I think this PR will be useful to test Microwindo/Nano-X on NuttX SIM |
xiaoxiang781216
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Aug 12, 2026
simbit18
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Aug 12, 2026
linguini1
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Aug 12, 2026
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| The Sim can emulate buttons, keyboard, touchscreen-mouse based, mouse with 3 buttons and analog-mouse based joystick. | ||
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| These drivers are particularly useful for graphical applications emulared over X11. |
| Keyboard | ||
| ======== | ||
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| There are two types of keyboards: is native one used by default on NuttX SIM, since it is used to access the NuttShell interface and the ``CONFIG_SIM_KEYBOARD`` used with graphical applications. |
| ===== | ||
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| The driver emulates a Mouse with 3 buttons support. It can be enabled using the | ||
| symbol: ``CONFIG_SIM_MOUSE``. This driver is useful with used with more advanced interfaces like Microwindow/Nano-X that require at least left and right click buttons events. |
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Is there a doc page to link to for nano x yet or no? If there is it would be good to backlink
| Touchscreen | ||
| =========== | ||
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| The difference between this driver and the Mouse is because this only generates a pen-down event when the user click in the interface. It is useful to use with LVGL graphic interface. |
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*is that this only generates
*when the user clicks
*with the LVGL
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| * undifferentiated "pen down" bit -- the whole point of | ||
| * CONFIG_SIM_MOUSE over CONFIG_SIM_TOUCHSCREEN is to keep which | ||
| * physical button was pressed. Not including that header here since | ||
| * it's the only thing that would pull NuttX input headers into this | ||
| * host-compiled (HOSTSRCS) file; the three bit values are hand-rolled | ||
| * instead, matching MOUSE_BUTTON_1=1, MOUSE_BUTTON_2=2, MOUSE_BUTTON_3=4. |
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I think everything after "pen down bit" is extra info that doesn't really describe the function. It's quite "AI sounding".
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| priv->eventloop = 1; | ||
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| /* And return success */ |
| struct sim_dev_s *priv = (struct sim_dev_s *)&g_simmouse; | ||
| char devname[DEV_NAMELEN]; | ||
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| /* Stop the event loop (Hmm.. the caller must be sure that there are no |
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Maybe we can state this assumption in the function comment? I've seen other NuttX functions use the "Assumptions" field.
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@acassis Nice work. |
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Summary
This PR adds Mouse emulation with 3 buttons support to NuttX SIM
Impact
NuttX users could use more advanced features with using mouse with Microwindow/Nano-X
Testing
SIM: