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Diffstat (limited to 'docs/internals_gpio_control.md')
| -rw-r--r-- | docs/internals_gpio_control.md | 24 | 
1 files changed, 13 insertions, 11 deletions
| diff --git a/docs/internals_gpio_control.md b/docs/internals_gpio_control.md index ccd3f8c74d..e1f1515b71 100644 --- a/docs/internals_gpio_control.md +++ b/docs/internals_gpio_control.md @@ -6,17 +6,19 @@ QMK has a GPIO control abstraction layer which is microcontroller agnostic. This  The following functions provide basic control of GPIOs and are found in `platforms/<platform>/gpio.h`. -|Function                |Description                                       | Old AVR Examples                                | Old ChibiOS/ARM Examples                        | -|------------------------|--------------------------------------------------|-------------------------------------------------|-------------------------------------------------| -| `setPinInput(pin)`     | Set pin as input with high impedance (High-Z)    | `DDRB &= ~(1<<2)`                               | `palSetLineMode(pin, PAL_MODE_INPUT)`           | -| `setPinInputHigh(pin)` | Set pin as input with builtin pull-up resistor   | `DDRB &= ~(1<<2); PORTB \|= (1<<2)`             | `palSetLineMode(pin, PAL_MODE_INPUT_PULLUP)`    | -| `setPinInputLow(pin)`  | Set pin as input with builtin pull-down resistor | N/A (Not supported on AVR)                      | `palSetLineMode(pin, PAL_MODE_INPUT_PULLDOWN)`  | -| `setPinOutput(pin)`    | Set pin as output                                | `DDRB \|= (1<<2)`                               | `palSetLineMode(pin, PAL_MODE_OUTPUT_PUSHPULL)` | -| `writePinHigh(pin)`    | Set pin level as high, assuming it is an output  | `PORTB \|= (1<<2)`                              | `palSetLine(pin)`                               | -| `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)`                            | +| Function                     | Description                                         | Old AVR Examples                                | Old ChibiOS/ARM Examples                         | +|------------------------------|-----------------------------------------------------|-------------------------------------------------|--------------------------------------------------| +| `setPinInput(pin)`           | Set pin as input with high impedance (High-Z)       | `DDRB &= ~(1<<2)`                               | `palSetLineMode(pin, PAL_MODE_INPUT)`            | +| `setPinInputHigh(pin)`       | Set pin as input with builtin pull-up resistor      | `DDRB &= ~(1<<2); PORTB \|= (1<<2)`             | `palSetLineMode(pin, PAL_MODE_INPUT_PULLUP)`     | +| `setPinInputLow(pin)`        | Set pin as input with builtin pull-down resistor    | N/A (Not supported on AVR)                      | `palSetLineMode(pin, PAL_MODE_INPUT_PULLDOWN)`   | +| `setPinOutput(pin)`          | Set pin as output (alias of `setPinOutputPushPull`) | `DDRB \|= (1<<2)`                               | `palSetLineMode(pin, PAL_MODE_OUTPUT_PUSHPULL)`  | +| `setPinOutputPushPull(pin)`  | Set pin as output, push/pull mode                   | `DDRB \|= (1<<2)`                               | `palSetLineMode(pin, PAL_MODE_OUTPUT_PUSHPULL)`  | +| `setPinOutputOpenDrain(pin)` | Set pin as output, open-drain mode                  | N/A (Not implemented on AVR)                    | `palSetLineMode(pin, PAL_MODE_OUTPUT_OPENDRAIN)` | +| `writePinHigh(pin)`          | Set pin level as high, assuming it is an output     | `PORTB \|= (1<<2)`                              | `palSetLine(pin)`                                | +| `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 | 
