mirror of https://github.com/rusefi/rusefi-1.git
79 lines
1.9 KiB
C++
79 lines
1.9 KiB
C++
/*
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* digital_input_exti.cpp
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*
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* Created on: Dec 18, 2018
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* @author Andrey Belomutskiy, (c) 2012-2020
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*/
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#include "global.h"
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#if HAL_USE_PAL && EFI_PROD_CODE
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#include "digital_input_exti.h"
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#include "efi_gpio.h"
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#include "error_handling.h"
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/**
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* EXTI is a funny thing: you can only use same pin on one port. For example, you can use
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* PA0 PB5 PE2 PD7
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* but you cannot use
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* PA0 PB0 PE2 PD7
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* because pin '0' would be used on two different ports
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*/
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static ioportmask_t ext_used = 0;
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// EXT is not able to give you the front direction but you could read the pin in the callback.
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void efiExtiEnablePin(const char *msg, brain_pin_e brainPin, uint32_t mode, palcallback_t cb, void *cb_data) {
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/* paranoid check, in case of GPIO_UNASSIGNED getHwPort will return NULL
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* and we will fail on next check */
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if (brainPin == GPIO_UNASSIGNED)
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return;
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ioportid_t port = getHwPort(msg, brainPin);
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if (port == NULL)
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return;
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int index = getHwPin(msg, brainPin);
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/* is this index already used? */
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if (ext_used & PAL_PORT_BIT(index)) {
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firmwareError(CUSTOM_ERR_PIN_ALREADY_USED_2, "%s: pin %d: exti index already used", msg, brainPin);
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return;
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}
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ioline_t line = PAL_LINE(port, index);
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palEnableLineEvent(line, mode);
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palSetLineCallback(line, cb, cb_data);
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/* mark used */
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ext_used |= PAL_PORT_BIT(index);
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}
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void efiExtiDisablePin(brain_pin_e brainPin)
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{
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/* paranoid check, in case of GPIO_UNASSIGNED getHwPort will return NULL
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* and we will fail on next check */
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if (brainPin == GPIO_UNASSIGNED)
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return;
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ioportid_t port = getHwPort("exti", brainPin);
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if (port == NULL)
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return;
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int index = getHwPin("exti", brainPin);
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/* is this index was used? */
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if (!(ext_used & PAL_PORT_BIT(index))) {
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return;
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}
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ioline_t line = PAL_LINE(port, index);
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palDisableLineEvent(line);
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/* mark unused */
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ext_used &= ~PAL_PORT_BIT(index);
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}
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#endif /* HAL_USE_PAL && EFI_PROD_CODE */
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