#ifndef ucoo_hal_gpio_gpio_stm32f1_hh #define ucoo_hal_gpio_gpio_stm32f1_hh // ucoolib - Microcontroller object oriented library. {{{ // // Copyright (C) 2015 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 STM32F1. class Gpio : public Io { public: enum class InputCnf : uint8_t { ANALOG = GPIO_CNF_Input_Analog << 2, FLOAT = GPIO_CNF_Input_Float << 2, // Up/Down is selected using output register. PULL_UPDOWN = GPIO_CNF_Input_PullUpDown << 2, }; enum class OutputCnf : uint8_t { PUSHPULL = GPIO_CNF_Output_PushPull << 2, OPENDRAIN = GPIO_CNF_Output_OpenDrain << 2, AF_PUSH_PULL = GPIO_CNF_Output_AFPushPull << 2, AF_OPENDRAIN = GPIO_CNF_Output_AFOpenDrain << 2, }; enum class Speed : uint8_t { SPEED_2MHZ = GPIO_MODE_Output_2MHz, SPEED_10MHZ = GPIO_MODE_Output_10MHz, SPEED_50MHZ = GPIO_MODE_Output_50MHz, }; 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 input configuration, used when port is input. void input_cnf (InputCnf cnf); /// Set output configuration, used when port is output. void output_cnf (OutputCnf cnf); /// Set output speed. void speed (Speed s); 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_; /// Configuration for input. InputCnf input_cnf_; /// Configuration for output. OutputCnf output_cnf_; /// Speed for output. Speed speed_; /// Current intput/output state. bool output_; }; /// General purpose input/output port on STM32F1. 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), input_cnf_ (InputCnf::FLOAT), output_cnf_ (OutputCnf::PUSHPULL), speed_ (Speed::SPEED_10MHZ), output_ (false) { } extern GpioPort GPIOA; extern GpioPort GPIOB; extern GpioPort GPIOC; extern GpioPort GPIOD; extern GpioPort GPIOE; } // namespace ucoo #endif // ucoo_hal_gpio_gpio_stm32f1_hh