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/*------------------------------------------------------------------------------
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-- This file is a part of the libuc, microcontroler library
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-- Copyright (C) 2012, Alexis Jeandet
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--
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-- This program is free software; you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation; either version 3 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program; if not, write to the Free Software
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-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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-------------------------------------------------------------------------------
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-- Author : Alexis Jeandet
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-- Mail : alexis.jeandet@member.fsf.org
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-------------------------------------------------------------------------------*/
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#include <gpio.h>
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#include <stm32f4xx_gpio.h>
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#include <stm32f4xx_rcc.h>
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#define GPIOGETPORT(gpio) ((GPIO_TypeDef*)(((((uint32_t)gpio) & (uint32_t)0x0000FF00)*(uint32_t)4) + (uint32_t)GPIOA))
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#define GPIOPORTNUM(gpio) (((uint32_t)(gpio) & (uint32_t)0x0000FF00)>>(uint32_t)8)
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gpio_t gpioopen(uint32_t gpio)
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{
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gpio &= -1^GPIOSPEEDMASK;
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gpio |= gpiolowspeed;
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gpio &= -1^GPIODIRMASK;
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gpio |= gpioindir;
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gpio &= -1^GPIOOUTTYPEMASK;
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gpio |= gpiopushpulltype;
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gpio &= -1^GPIOPULLTYPEMASK;
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gpio |= gpionopulltype;
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gpiosetconfig(&gpio);
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RCC_AHB1PeriphClockCmd(((uint32_t)0x00000001<<GPIOPORTNUM(gpio)), ENABLE);
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return gpio;
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}
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void gpioclose(gpio_t gpio)
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{
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}
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void gpiosetconfig(gpio_t* gpio)
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{
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gpiosetdir(gpio, (*gpio & GPIODIRMASK));
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gpiosetspeed(gpio, (*gpio & GPIOSPEEDMASK));
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gpiosetouttype(gpio, (*gpio & GPIOOUTTYPEMASK));
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gpiosetpulltype(gpio, (*gpio & GPIOPULLTYPEMASK));
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}
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extern void gpiosetspeed(gpio_t* gpio,gpiospeed_t speed)
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{
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GPIO_TypeDef* GPIOx = GPIOGETPORT((*gpio));
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switch(speed)
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{
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case gpiolowspeed :
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if((*gpio & 0xFF)==0xFF)
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{
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for(int i=0;i<16;i++)
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{
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GPIOx->OSPEEDR &= ~(GPIO_OSPEEDER_OSPEEDR0 << (i * 2));
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GPIOx->OSPEEDR |= ((uint32_t)(GPIO_Speed_2MHz) << (i * 2));
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}
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}
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else
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{
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GPIOx->OSPEEDR &= ~(GPIO_OSPEEDER_OSPEEDR0 << ((*gpio & 0xFF) * 2));
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GPIOx->OSPEEDR |= ((uint32_t)(GPIO_Speed_2MHz) << ((*gpio & 0xFF) * 2));
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}
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*gpio &= ~GPIOSPEEDMASK;
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*gpio |= gpiolowspeed;
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break;
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case gpiomediumspeed :
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if((*gpio & 0xFF)==0xFF)
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{
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for(int i=0;i<16;i++)
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{
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GPIOx->OSPEEDR &= ~(GPIO_OSPEEDER_OSPEEDR0 << (i * 2));
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GPIOx->OSPEEDR |= ((uint32_t)(GPIO_Speed_25MHz) << (i * 2));
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}
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}
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else
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{
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GPIOx->OSPEEDR &= ~(GPIO_OSPEEDER_OSPEEDR0 << ((*gpio & 0xFF) * 2));
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GPIOx->OSPEEDR |= ((uint32_t)(GPIO_Speed_25MHz) << ((*gpio & 0xFF) * 2));
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}
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*gpio &= ~GPIOSPEEDMASK;
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*gpio |= gpiomediumspeed;
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break;
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case gpiofastspeed :
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if((*gpio & 0xFF)==0xFF)
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{
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for(int i=0;i<16;i++)
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{
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GPIOx->OSPEEDR &= ~(GPIO_OSPEEDER_OSPEEDR0 << (i * 2));
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GPIOx->OSPEEDR |= ((uint32_t)(GPIO_Speed_50MHz) << (i * 2));
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}
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}
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else
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{
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GPIOx->OSPEEDR &= ~(GPIO_OSPEEDER_OSPEEDR0 << ((*gpio & 0xFF) * 2));
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GPIOx->OSPEEDR |= ((uint32_t)(GPIO_Speed_50MHz) << ((*gpio & 0xFF) * 2));
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}
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*gpio &= ~GPIOSPEEDMASK;
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*gpio |= gpiofastspeed;
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break;
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case gpiohighspeed :
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if((*gpio & 0xFF)==0xFF)
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{
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for(int i=0;i<16;i++)
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{
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GPIOx->OSPEEDR &= ~(GPIO_OSPEEDER_OSPEEDR0 << (i * 2));
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GPIOx->OSPEEDR |= ((uint32_t)(GPIO_Speed_100MHz) << (i * 2));
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}
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}
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else
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{
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GPIOx->OSPEEDR &= ~(GPIO_OSPEEDER_OSPEEDR0 << ((*gpio & 0xFF) * 2));
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GPIOx->OSPEEDR |= ((uint32_t)(GPIO_Speed_100MHz) << ((*gpio & 0xFF) * 2));
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}
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*gpio &= ~GPIOSPEEDMASK;
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*gpio |= gpiohighspeed;
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break;
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}
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}
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void gpiosetdir(gpio_t* gpio,gpiodir_t dir)
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{
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GPIO_TypeDef* GPIOx = GPIOGETPORT((*gpio));
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switch(dir)
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{
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case gpiooutdir:
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if((*gpio & 0xFF)==0xFF)
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{
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for(int i=0;i<16;i++)
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{
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GPIOx->MODER &= ~(GPIO_MODER_MODER0 << (i * 2));
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GPIOx->MODER |= (GPIO_Mode_OUT << (i * 2));
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}
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}
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else
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{
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GPIOx->MODER &= ~(GPIO_MODER_MODER0 << ((*gpio & 0xFF) * 2));
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GPIOx->MODER |= (GPIO_Mode_OUT << ((*gpio & 0xFF) * 2));
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}
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*gpio &= ~GPIODIRMASK;
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*gpio |= gpiooutdir;
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break;
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case gpioaf:
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if((*gpio & 0xFF)==0xFF)
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{
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for(int i=0;i<16;i++)
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{
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GPIOx->MODER &= ~(GPIO_MODER_MODER0 << (i * 2));
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GPIOx->MODER |= (GPIO_Mode_AF << (i * 2));
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}
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}
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else
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{
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GPIOx->MODER &= ~(GPIO_MODER_MODER0 << ((*gpio & 0xFF) * 2));
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GPIOx->MODER |= (GPIO_Mode_AF << ((*gpio & 0xFF) * 2));
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}
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*gpio &= ~GPIODIRMASK;
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*gpio |= gpioaf;
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break;
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case gpioan:
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if((*gpio & 0xFF)==0xFF)
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{
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for(int i=0;i<16;i++)
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{
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GPIOx->MODER &= ~(GPIO_MODER_MODER0 << (i * 2));
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GPIOx->MODER |= (GPIO_Mode_AN << (i * 2));
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}
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}
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else
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{
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GPIOx->MODER &= ~(GPIO_MODER_MODER0 << ((*gpio & 0xFF) * 2));
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GPIOx->MODER |= (GPIO_Mode_AN << ((*gpio & 0xFF) * 2));
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}
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*gpio &= ~GPIODIRMASK;
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*gpio |= gpioan;
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break;
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default :
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if((*gpio & 0xFF)==0xFF)
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{
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for(int i=0;i<16;i++)
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{
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GPIOx->MODER &= ~(GPIO_MODER_MODER0 << (i * 2));
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GPIOx->MODER |= (GPIO_Mode_IN << (i * 2));
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}
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}
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else
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{
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GPIOx->MODER &= ~(GPIO_MODER_MODER0 << ((*gpio & 0xFF) * 2));
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GPIOx->MODER |= (GPIO_Mode_IN << ((*gpio & 0xFF) * 2));
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}
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*gpio &= ~GPIODIRMASK;
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*gpio |= gpioindir;
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break;
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}
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}
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void gpiosetouttype(gpio_t* gpio, gpioouttype_t outtype)
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{
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GPIO_TypeDef* GPIOx = GPIOGETPORT((*gpio));
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if(outtype == gpioopendraintype)
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{
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if((*gpio & 0xFF)==0xFF)
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{
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for(int i=0;i<16;i++)
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{
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GPIOx->OTYPER &= ~((GPIO_OTYPER_OT_0) << ((uint16_t)i));
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GPIOx->OTYPER |= (uint16_t)(GPIO_OType_OD<<((uint16_t)i));
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}
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}
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else
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{
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GPIOx->OTYPER &= ~((GPIO_OTYPER_OT_0) << ((uint16_t)(*gpio & 0xFF)));
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GPIOx->OTYPER |= (uint16_t)(GPIO_OType_OD<<((uint16_t)(*gpio & 0xFF)));
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}
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*gpio &= ~GPIOOUTTYPEMASK;
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*gpio |= gpioopendraintype;
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}
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else
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{
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if((*gpio & 0xFF)==0xFF)
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{
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for(int i=0;i<16;i++)
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{
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GPIOx->OTYPER &= ~((GPIO_OTYPER_OT_0) << ((uint16_t)i));
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GPIOx->OTYPER |= (uint16_t)(GPIO_OType_PP<<((uint16_t)i));
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}
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}
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else
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{
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GPIOx->OTYPER &= ~((GPIO_OTYPER_OT_0) << ((uint16_t)(*gpio & 0xFF)));
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GPIOx->OTYPER |= (uint16_t)(GPIO_OType_PP<<((uint16_t)(*gpio & 0xFF)));
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}
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*gpio &= ~GPIOOUTTYPEMASK;
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*gpio |= gpiopushpulltype;
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}
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}
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void gpiosetpulltype(gpio_t* gpio,gpiopulltype_t pulltype)
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{
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GPIO_TypeDef* GPIOx = GPIOGETPORT(*gpio);
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switch(pulltype)
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{
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case gpiopulluptype:
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if((*gpio & 0xFF)==0xFF)
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{
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for(int i=0;i<16;i++)
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{
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GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPDR0 << ((uint16_t)i * 2));
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GPIOx->PUPDR |= (GPIO_PuPd_UP << (i * 2));
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}
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}
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else
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{
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GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPDR0 << ((uint16_t)(*gpio & 0xFF) * 2));
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GPIOx->PUPDR |= (GPIO_PuPd_UP << ((*gpio & 0xFF) * 2));
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}
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*gpio &= ~GPIOPULLTYPEMASK;
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*gpio |= gpiopulluptype;
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break;
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case gpiopulldowntype:
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if((*gpio & 0xFF)==0xFF)
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{
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for(int i=0;i<16;i++)
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{
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GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPDR0 << ((uint16_t)i * 2));
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GPIOx->PUPDR |= (GPIO_PuPd_DOWN << (i * 2));
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}
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}
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else
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{
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GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPDR0 << ((uint16_t)(*gpio & 0xFF) * 2));
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GPIOx->PUPDR |= (GPIO_PuPd_DOWN << ((*gpio & 0xFF) * 2));
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}
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*gpio &= ~GPIOPULLTYPEMASK;
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*gpio |= gpiopulldowntype;
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break;
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default :
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if((*gpio & 0xFF)==0xFF)
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{
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for(int i=0;i<16;i++)
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{
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GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPDR0 << ((uint16_t)i * 2));
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GPIOx->PUPDR |= (GPIO_PuPd_NOPULL << (i * 2));
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}
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}
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else
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{
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GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPDR0 << ((uint16_t)(*gpio & 0xFF) * 2));
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GPIOx->PUPDR |= (GPIO_PuPd_NOPULL << ((*gpio & 0xFF) * 2));
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}
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*gpio &= ~GPIOPULLTYPEMASK;
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*gpio |= gpionopulltype;
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break;
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}
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}
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void gpioset(gpio_t gpio)
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{
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GPIO_TypeDef* GPIOx = GPIOGETPORT(gpio);
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if((gpio & 0xFF)==0xFF)
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{
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GPIOx->BSRRL = -1;
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}
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else
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{
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GPIOx->BSRRL = 1<<(gpio & 0xFF);
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}
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}
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void gpioclr(gpio_t gpio)
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{
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GPIO_TypeDef* GPIOx = GPIOGETPORT(gpio);
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if((gpio & 0xFF)==0xFF)
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{
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GPIOx->BSRRH = -1;
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}
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else
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{
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GPIOx->BSRRH = 1<<(gpio & 0xFF);
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}
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}
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void gpiosetval(gpio_t gpio,int val)
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{
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GPIO_TypeDef* GPIOx = GPIOGETPORT(gpio);
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if((gpio & 0xFF)==0xFF)
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{
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GPIOx->ODR = val;
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}
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else
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{
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if(val)
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GPIOx->BSRRL = 1<<(gpio & 0xFF);
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else
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GPIOx->BSRRH = 1<<(gpio & 0xFF);
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}
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}
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int gpiogetval(gpio_t gpio)
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{
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GPIO_TypeDef* GPIOx = GPIOGETPORT(gpio);
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if((gpio & 0xFF)==0xFF)
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{
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return GPIOx->IDR;
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}
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else
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{
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return ((GPIOx->IDR>>(gpio & 0xFF)) & 1);
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}
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}
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