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AP_HAL: added support for saving and restoring GPIO settings

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this allows for using any pin (eg. UART TX, RX, RTS, CTS) as a GPIO,
and restoring the old mode. Initial use is for spektrum bind on RX pin
This commit is contained in:
Andrew Tridgell 2021-10-10 15:45:18 +11:00
parent 25324ae0e2
commit 029743e27a
1 changed files with 4 additions and 0 deletions
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4
libraries/AP_HAL/GPIO.h
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@ -55,6 +55,10 @@ public:
virtual void toggle(uint8_t pin) = 0;
virtual bool valid_pin(uint8_t pin) const { return true; }
// allow for save and restore of pin settings
virtual bool get_mode(uint8_t pin, uint32_t &mode) { return false; }
virtual void set_mode(uint8_t pin, uint32_t mode) {}
/* Alternative interface: */
virtual AP_HAL::DigitalSource* channel(uint16_t n) = 0;