#ifndef ucoo_hal_gpio_gpio_stm32f4_hh #define ucoo_hal_gpio_gpio_stm32f4_hh // ucoolib - Microcontroller object oriented library. {{{ // // Copyright (C) 2012 Nicolas Schodet // // Permission is hereby granted, free of charge, to any person obtaining a // copy of this software and associated documentation files (the "Software"), // to deal in the Software without restriction, including without limitation // the rights to use, copy, modify, merge, publish, distribute, sublicense, // and/or sell copies of the Software, and to permit persons to whom the // Software is furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER // DEALINGS IN THE SOFTWARE. // // }}} #include "ucoo/intf/io.hh" #include "ucoo/arch/reg.hh" #include "ucoo/arch/rcc.stm32.hh" namespace ucoo { class GpioPort; /// General purpose input/output on STM32F4. class Gpio : public Io { public: enum class Pull : uint32_t { NONE, UP, DOWN, }; enum class Speed : uint32_t { SPEED_2MHZ, SPEED_25MHZ, SPEED_50MHZ, SPEED_100MHZ, }; enum class Type : uint32_t { PUSH_PULL, OPEN_DRAIN, }; public: /// See Io::set. void set (); /// See Io::reset. void reset (); /// See Io::set. void set (bool state); /// See Io::toggle. void toggle (); /// See Io::get. bool get () const; /// See Io::input. void input (); /// See Io::output. void output (); /// Set pull-up or pull-down. void pull (Pull dir); /// Set output speed. void speed (Speed s); /// Set output type. void type (Type t); /// Set alternate function. void af (int num); /// Set as analog. void analog (); private: /// Constructor, take a port, and pin BIT number. Gpio (GpioPort &port, int bit); friend GpioPort; private: /// Port register base address. GPIO_TypeDef * const port_; /// IO bitmask. const uint16_t mask_; }; /// General purpose input/output port on STM32F4. class GpioPort { GPIO_TypeDef * const port_; const Rcc rcc_; friend class Gpio; public: /// Constructor. GpioPort (GPIO_TypeDef *port, Rcc rcc) : port_ (port), rcc_ (rcc) { } /// Enable port. void enable () { rcc_peripheral_clock_enable (rcc_); } /// Disable port. void disable () { rcc_peripheral_clock_disable (rcc_); } /// Return a port GPIO. Gpio operator[] (int bit) { return Gpio (*this, bit); } /// Get the index of the port, used with Exti. int get_port_index () const; }; inline Gpio::Gpio (GpioPort &port, int bit) : port_ (port.port_), mask_ (1u << bit) { } extern GpioPort GPIOA; extern GpioPort GPIOB; extern GpioPort GPIOC; extern GpioPort GPIOD; extern GpioPort GPIOE; extern GpioPort GPIOF; extern GpioPort GPIOG; extern GpioPort GPIOH; extern GpioPort GPIOI; extern GpioPort GPIOJ; extern GpioPort GPIOK; } // namespace ucoo #endif // ucoo_hal_gpio_gpio_stm32f4_hh