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| -rw-r--r-- | docs/custom_quantum_functions.md | 35 |
1 files changed, 10 insertions, 25 deletions
diff --git a/docs/custom_quantum_functions.md b/docs/custom_quantum_functions.md index 3879e43bc7..71a30bc7c6 100644 --- a/docs/custom_quantum_functions.md +++ b/docs/custom_quantum_functions.md @@ -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; } |