From f11a1ca3492ebe0b415dec05738d3dfebc774dbc Mon Sep 17 00:00:00 2001 From: Drashna Jaelre Date: Sat, 1 Dec 2018 08:21:06 -0800 Subject: [PATCH] Add tap_random_base64 and software timer info to Useful Functions doc (#4360) * Update docs * Add security caveat Co-Authored-By: drashna * Wordsmithing Co-Authored-By: drashna * Update docs/ref_functions.md Co-Authored-By: drashna --- docs/faq_keymap.md | 17 ----------------- docs/ref_functions.md | 21 +++++++++++++++++++++ 2 files changed, 21 insertions(+), 17 deletions(-) diff --git a/docs/faq_keymap.md b/docs/faq_keymap.md index 4e842d363cee..ae01e938780a 100644 --- a/docs/faq_keymap.md +++ b/docs/faq_keymap.md @@ -211,20 +211,3 @@ here real_mods lost state for 'physical left shift'. weak_mods is ORed with real_mods when keyboard report is sent. https://github.com/tmk/tmk_core/blob/master/common/action_util.c#L57 - -## Timer Functionality - -It's possible to start timers and read values for time-specific events - here's an example: - -```c -static uint16_t key_timer; -key_timer = timer_read(); - -if (timer_elapsed(key_timer) < 100) { - // do something if less than 100ms have passed -} else { - // do something if 100ms or more have passed -} -``` - -It's best to declare the `static uint16_t key_timer;` at the top of the file, outside of any code blocks you're using it in. diff --git a/docs/ref_functions.md b/docs/ref_functions.md index 9b5be7a883ff..174d9a95a6f4 100644 --- a/docs/ref_functions.md +++ b/docs/ref_functions.md @@ -96,3 +96,24 @@ And to do so, add `reset_keyboard()` to your function or macro, and this will re If you're having issues with Audio, RGB Underglow, backlighting or keys acting weird, then you can reset the EEPROM (persistent setting storage). Bootmagic is one way to do this, but if that isn't enabled, then you can use a custom macro to do so. To wipe the EEPROM, run `eeconfig_init()` from your function or macro to reset most of the settings to default. + +## Tap random key + +If you want to send a random character to the host computer, you can use the `tap_random_base64()` function. This [pseudorandomly](https://en.wikipedia.org/wiki/Pseudorandom_number_generator) selects a number between 0 and 63, and then sends a key press based on that selection. (0–25 is `A`–`Z`, 26–51 is `a`–`z`, 52–61 is `0`–`9`, 62 is `+` and 63 is `/`). + +?> Needless to say, but this is _not_ a cryptographically secure method of generating random Base64 keys or passwords. + +## Software Timers + +It's possible to start timers and read values for time-specific events. Here's an example: + +```c +static uint16_t key_timer; +key_timer = timer_read(); + +if (timer_elapsed(key_timer) < 100) { + // do something if less than 100ms have passed +} else { + // do something if 100ms or more have passed +} +```