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89 lines
3.6 KiB
C
89 lines
3.6 KiB
C
/*
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* Copyright 2024 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <stdbool.h>
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#include "stm32f7xx.h"
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#include "board/board.h"
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void gpio_disable_all(void);
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void gpio_use(GPIO_TypeDef* GPIOx);
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void gpio_release(GPIO_TypeDef* GPIOx);
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//! Initialize a GPIO as an output.
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//!
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//! @param pin_config the BOARD_CONFIG pin configuration struct
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//! @param otype the output type of the pin (GPIO_OType_PP or GPIO_OType_OD)
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//! @param speed the output slew rate
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//! @note The slew rate should be set as low as possible for the
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//! pin function to minimize ringing and RF interference.
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void gpio_output_init(const OutputConfig *pin_config, GPIOOType_TypeDef otype,
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GPIOSpeed_TypeDef speed);
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//! Assert or deassert the output pin.
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//!
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//! Asserting the output drives the pin high if pin_config.active_high
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//! is true, and drives it low if pin_config.active_high is false.
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void gpio_output_set(const OutputConfig *pin_config, bool asserted);
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//! Configure a GPIO alternate function.
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//!
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//! @param pin_config the BOARD_CONFIG pin configuration struct
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//! @param otype the output type of the pin (GPIO_OType_PP or GPIO_OType_OD)
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//! @param speed the output slew rate
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//! @param pupd pull-up or pull-down configuration
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//! @note The slew rate should be set as low as possible for the
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//! pin function to minimize ringing and RF interference.
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void gpio_af_init(const AfConfig *af_config, GPIOOType_TypeDef otype,
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GPIOSpeed_TypeDef speed, GPIOPuPd_TypeDef pupd);
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//! Configure a GPIO alternate function pin to minimize power consumption.
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//!
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//! Once a pin has been configured for low power, it is no longer
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//! connected to its alternate function. \ref gpio_af_init will need to
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//! be called again on the pin in order to configure it in alternate
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//! function mode again.
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void gpio_af_configure_low_power(const AfConfig *af_config);
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//! Configure a GPIO alternate function pin to drive a constant output.
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//!
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//! Once a pin has been configured as a fixed output, it is no longer
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//! connected to its alternate function. \ref gpio_af_init will need to
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//! be called again on the pin in order to configure it in alternate
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//! function mode again.
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void gpio_af_configure_fixed_output(const AfConfig *af_config, bool asserted);
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//! Configure all GPIOs in the system to optimize for power consumption.
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//! At poweron most GPIOs can be configured as analog inputs instead of the
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//! default digital input. This allows digital filtering logic to be shut down,
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//! saving quite a bit of power.
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void gpio_init_all(void);
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//! Configure gpios as inputs (suitable for things like exti lines)
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void gpio_input_init(const InputConfig *input_cfg);
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//! Configure gpio as an input with internal pull up/pull down configured.
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void gpio_input_init_pull_up_down(const InputConfig *input_cfg, GPIOPuPd_TypeDef pupd);
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//! @return bool the current state of the GPIO pin
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bool gpio_input_read(const InputConfig *input_cfg);
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//! Configure gpios as analog inputs. Useful for unused GPIOs as this is their lowest power state.
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void gpio_analog_init(const InputConfig *input_cfg);
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