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Update led_update_kb example (#7451) 

* Update led_update_kb example

* Update comment to explain pin behavior

* wordsmith

* wordsmithing 2
This commit is contained in:
Yan-Fa Li 2019-11-23 07:37:25 -08:00 committed by Joel Challis
parent eae21eed74
commit 3541f01a72
1 changed files with 10 additions and 25 deletions
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35
docs/custom_quantum_functions.md
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@ -132,31 +132,16 @@ Some examples include:
bool led_update_kb(led_t led_state) {
bool res = led_update_user(led_state);
if(res) {
if (led_state.num_lock) {
writePinLow(B0);
} else {
writePinHigh(B0);
}
if (led_state.caps_lock) {
writePinLow(B1);
} else {
writePinHigh(B1);
}
if (led_state.scroll_lock) {
writePinLow(B2);
} else {
writePinHigh(B2);
}
if (led_state.compose) {
writePinLow(B3);
} else {
writePinHigh(B3);
}
if (led_state.kana) {
writePinLow(B4);
} else {
writePinHigh(B4);
}
// writePin sets the pin high for 1 and low for 0.
// In this example the pins are inverted, setting
// it low/0 turns it on, and high/1 turns the LED off.
// This behavior depends on whether the LED is between the pin
// and VCC or the pin and GND.
writePin(B0, !led_state.num_lock);
writePin(B1, !led_state.caps_lock);
writePin(B2, !led_state.scroll_lock);
writePin(B3, !led_state.compose);
writePin(B4, !led_state.kana);
}
return res;
}