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master
forksand-xd87
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planck_thk
vuepress
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future_ppdis_none
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arm-dac-work
titmlb
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peasy
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embedded
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fywut
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readme-update
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twi2c
arm_audio_fixes
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audio_out
gb_port
clueboard_1
info_json_populate
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make_autocomplete
hid_api
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sid
keyboards_json
keyboard_identifiers
pp_definitions
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eeprom_update
process_keycode_update
b6_b7_audio
example_keyboards
preonic-1.0
planck-4.0
0.5.0
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LUFA-111009
LUFA-130901
LUFA-130901-BETA
LUFA-140302
LUFA-140928
LUFA-151115
LUFA-170418
breakpoint_2019_08_30
ergodox_ez-161205
gh60-0.1
planck-4.1
planck-4.2
planck-5.0
planck-6.0
planck-6.1
planck-light-1.0
preonic-2.0
v4.0
${ noResults }
1.6 KiB
1.6 KiB
GPIO Control
QMK has a GPIO control abstraction layer which is micro-controller agnostic. This is done to allow easy access to pin control across different platforms.
Functions
The following functions can provide basic control of GPIOs and are found in quantum/quantum.h.
| Function | Description |
|---|---|
setPinInput(pin) |
Set pin as input with high impedance (High-Z) |
setPinInputHigh(pin) |
Set pin as input with build in pull-up |
setPinInputLow(pin) |
Set pin as input with build in pull-down (Supported only on STM32) |
setPinOutput(pin) |
Set pin as output |
writePinHigh(pin) |
Set pin level as high, assuming it is an output |
writePinLow(pin) |
Set pin level as low, assuming it is an output |
writePin(pin, level) |
Set pin level, assuming it is an output |
readPin(pin) |
Returns the level of the pin |
Advance settings
Each micro-controller can have multiple advance settings regarding its GPIO. This abstraction layer does not limit the use of architecture specific functions. Advance users should consult the datasheet of there desired device and include any needed libraries. For AVR the standard avr/io.h library is used and for STM32 the Chibios PAL library is used.