summaryrefslogtreecommitdiff
path: root/docs/feature_digitizer.md
diff options
context:
space:
mode:
Diffstat (limited to 'docs/feature_digitizer.md')
-rw-r--r--docs/feature_digitizer.md35
1 files changed, 35 insertions, 0 deletions
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.