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add 'togglePin' convenience function (#8734)

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* add 'togglePin' conveniance function

for AVR and chibios

* drop outmost parantheses

Co-Authored-By: Konstantin Đorđević <[email protected]>

* toggle pin on avrs

toggle a pin configured as output by writing the corresponding bit to the PIN register

Co-Authored-By: Takeshi ISHII <[email protected]>

* togglepin: add documentation for newly added function

* Update docs/internals_gpio_control.md

Co-Authored-By: Konstantin Đorđević <[email protected]>

* on AVR: use PORTD to toggle the output

... since not all MCUs support toggling through writing to PIN

Co-Authored-By: Ryan <[email protected]>

Co-authored-by: Johannes <[email protected]>
Co-authored-by: Konstantin Đorđević <[email protected]>
Co-authored-by: Takeshi ISHII <[email protected]>
Co-authored-by: Ryan <[email protected]>
This commit is contained in:
JohSchneiderKonstantin ĐorđevićTakeshi ISHIIRyanJohannes
 authored and GitHub committed 2020-04-29 04:04:29 -07:00
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commit d26a14c169
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docs/internals_gpio_control.md
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@@ -16,6 +16,7 @@ The following functions can provide basic control of GPIOs and are found in `qua
| `writePinLow(pin)` | Set pin level as low, assuming it is an output | `PORTB &= ~(1<<2)` | `palClearLine(pin)` |
| `writePin(pin, level)` | Set pin level, assuming it is an output | `(level) ? PORTB \|= (1<<2) : PORTB &= ~(1<<2)` | `(level) ? palSetLine(pin) : palClearLine(pin)` |
| `readPin(pin)` | Returns the level of the pin | `_SFR_IO8(pin >> 4) & _BV(pin & 0xF)` | `palReadLine(pin)` |
| `togglePin(pin)` | Invert pin level, assuming it is an output | `PORTB ^= (1<<2)` | `palToggleLine(pin)` |
## Advanced Settings :id=advanced-settings