From 75b49aff56436c57a424e622c91f6d80e1d0ecc2 Mon Sep 17 00:00:00 2001 From: a-chol Date: Tue, 17 Aug 2021 20:52:44 +0200 Subject: Digitizer HID interface : absolute coordinates for mouse cursor (#12851) * Add digitizer HID interface for setting the mouse cursor position at absolute screen coordinates. Tested on Pro Micro, Proton C and Blackpill. * Update docs/feature_digitizer.md Co-authored-by: Ryan * Update tmk_core/protocol/usb_descriptor.c Co-authored-by: Ryan * Add missing copyrights Add V-USB support * Add support for digitizer dedicated endpoint for lufa and chibios. Fix formatting issues Move digitizer_task definition to the feature's base implementation file * Run cformat on modified files * Change digitizer report usage to Digitizer instead of Pen to avoid pointer disappearing on Windows. * Update tmk_core/protocol/vusb/vusb.c Co-authored-by: Ryan * Run cformat from docker image * Remove send_digitizer from host_driver_t and instead rely on the declaration being the interface to the implementation in each HW-specific usb implementation. * Fix build : send_digitizer shouldn't be static in vusb and add weak-linkage implementation for tests without usb implementation * Change digitizer user interface to match pointing device's * Update documentation with new API Co-authored-by: a-chol Co-authored-by: Ryan --- docs/feature_digitizer.md | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 docs/feature_digitizer.md (limited to 'docs/feature_digitizer.md') diff --git a/docs/feature_digitizer.md b/docs/feature_digitizer.md new file mode 100644 index 0000000000..9b6aeddbaa --- /dev/null +++ b/docs/feature_digitizer.md @@ -0,0 +1,35 @@ +## Digitizer + +The digitizer HID interface allows setting the mouse cursor position at absolute coordinates, unlike the Pointing Device feature that applies relative displacements. + +To enable the digitizer interface, add the following line to your rules.mk: + +```makefile +DIGITIZER_ENABLE = yes +``` + +In order to change the mouse cursor position from your keymap.c file, include the digitizer header : + +```c +#include "digitizer.h" +``` + +This gives you access to the `digitizer` structure which members allow you to change the cursor position. + +The coordinates are normalized, meaning there value must be set between 0 and 1. For the `x` coordinate, the value `0` is the leftmost position, whereas the value `1` is the rightmost position. +For the `y` coordinate, `0` is at the top and `1` at the bottom. + +Here is an example setting the cursor in the middle of the screen: + +```c +digitizer_t digitizer; +digitizer.x = 0.5; +digitizer.y = 0.5; +digitizer.tipswitch = 0; +digitizer.inrange = 1; +digitizer_set_report(digitizer); +``` + +The `tipswitch` member triggers what equates to a click when set to `1`. The `inrange` member is required for the change in coordinates to be taken. It can then be set to `0` in a new report to signal the end of the digitizer interaction, but it is not strictly required. + +Once all members are set to the desired value, the `status` member needs its bitmask `DZ_UPDATED` to be set so the report is sent during the next main loop iteration. -- cgit v1.2.3