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gpio.c
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/ lib / src / lpc17XX / GPIO / gpio.c
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/*------------------------------------------------------------------------------
-- This file is a part of the libuc, microcontroler library
-- Copyright (C) 2012, Alexis Jeandet
--
-- This program is free software; you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation; either version 3 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program; if not, write to the Free Software
-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-------------------------------------------------------------------------------
-- Author : Alexis Jeandet
-- Mail : alexis.jeandet@gmail.com
-------------------------------------------------------------------------------*/
#include <gpio.h>
//#include <lpc17xx_gpio.h>
#include <LPC17xx.h>
typedef struct {
__IO uint32_t FIODIR; /**< FIO direction register */
uint32_t RESERVED0[3]; /**< Reserved */
__IO uint32_t FIOMASK; /**< FIO mask register */
__IO uint32_t FIOPIN; /**< FIO pin register */
__IO uint32_t FIOSET; /**< FIO set register */
__O uint32_t FIOCLR; /**< FIO clear register */
} GPIO_TypeDef;
#define GPIOGETPORT(gpio) ((GPIO_TypeDef*)(((((uint32_t)gpio) & (uint32_t)0x0000FF00)*(uint32_t)2) + (uint32_t)LPC_GPIO_BASE))
#define GPIOPORTNUM(gpio) (((uint32_t)(gpio) & (uint32_t)0x0000FF00)>>(uint32_t)8)
#define GPIOGETPINMODE(gpio) ((GPIOPORTNUM(gpio)*8) + (LPC_PINCON_BASE+0x40))
#define GPIOGETPINMODE_OD(gpio) ((GPIOPORTNUM(gpio)*4) + (LPC_PINCON_BASE+0x68))
gpio_t gpioopen(uint32_t gpio)
{
gpio &= -1^GPIOSPEEDMASK;
gpio |= gpiolowspeed;
gpio &= -1^GPIODIRMASK;
gpio |= gpioindir;
gpio &= -1^GPIOOUTTYPEMASK;
gpio |= gpiopushpulltype;
gpio &= -1^GPIOPULLTYPEMASK;
gpio |= gpionopulltype;
gpiosetconfig(&gpio);
return gpio;
}
void gpioclose(gpio_t gpio)
{
}
void gpiosetconfig(gpio_t* gpio)
{
gpiosetdir(gpio, (*gpio & GPIODIRMASK));
gpiosetspeed(gpio, (*gpio & GPIOSPEEDMASK));
gpiosetouttype(gpio, (*gpio & GPIOOUTTYPEMASK));
gpiosetpulltype(gpio, (*gpio & GPIOPULLTYPEMASK));
}
extern void gpiosetspeed(gpio_t* gpio,gpiospeed_t speed)
{
/*no speed option on lpc17xx*/
}
void gpiosetdir(gpio_t* gpio,gpiodir_t dir)
{
GPIO_TypeDef* GPIOx = GPIOGETPORT((*gpio));
switch(dir)
{
case gpiooutdir:
if((*gpio & 0xFF)==0xFF)
{
GPIOx->FIODIR = -1;
}
else
{
GPIOx->FIODIR |= 1<<(*gpio & 0xFF);
}
*gpio &= ~GPIODIRMASK;
*gpio |= gpiooutdir;
break;
case gpioaf:
/*No af mode on lpc17xx*/
//*gpio &= ~GPIODIRMASK;
//*gpio |= gpioaf;
break;
case gpioan:
/*No an mode on lpc17xx*/
/**gpio &= ~GPIODIRMASK;
*gpio |= gpioan;*/
break;
default :
if((*gpio & 0xFF)==0xFF)
{
GPIOx->FIODIR = 0;
}
else
{
GPIOx->FIODIR &= ~(1<<(*gpio & 0xFF));
}
*gpio &= ~GPIODIRMASK;
*gpio |= gpioindir;
break;
}
}
void gpiosetouttype(gpio_t* gpio, gpioouttype_t outtype)
{
GPIO_TypeDef* GPIOx = GPIOGETPORT((*gpio));
if(outtype == gpioopendraintype)
{
if((*gpio & 0xFF)==0xFF)
{
GPIOGETPINMODE_OD(gpio) =-1;
for(int i=0;i<16;i++)
{
*GPIOGETPINMODE(*gpio) &= ~(3<<((*gpio & 0xFF)*2));
*(GPIOGETPINMODE(*gpio)+4) &= ~(3<<((*gpio & 0xFF)*2));
}
}
else
{
//GPIOx->OTYPER &= ~((GPIO_OTYPER_OT_0) << ((uint16_t)(*gpio & 0xFF)));
//GPIOx->OTYPER |= (uint16_t)(GPIO_OType_OD<<((uint16_t)(*gpio & 0xFF)));
}
*gpio &= ~GPIOOUTTYPEMASK;
*gpio |= gpioopendraintype;
}
else
{
if((*gpio & 0xFF)==0xFF)
{
for(int i=0;i<16;i++)
{
//GPIOx->OTYPER &= ~((GPIO_OTYPER_OT_0) << ((uint16_t)i));
//GPIOx->OTYPER |= (uint16_t)(GPIO_OType_PP<<((uint16_t)i));
}
}
else
{
//GPIOx->OTYPER &= ~((GPIO_OTYPER_OT_0) << ((uint16_t)(*gpio & 0xFF)));
//GPIOx->OTYPER |= (uint16_t)(GPIO_OType_PP<<((uint16_t)(*gpio & 0xFF)));
}
*gpio &= ~GPIOOUTTYPEMASK;
*gpio |= gpiopushpulltype;
}
}
void gpiosetpulltype(gpio_t* gpio,gpiopulltype_t pulltype)
{
//GPIO_TypeDef* GPIOx = GPIOGETPORT(*gpio);
switch(pulltype)
{
case gpiopulluptype:
if((*gpio & 0xFF)==0xFF)
{
for(int i=0;i<16;i++)
{
//GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPDR0 << ((uint16_t)i * 2));
//GPIOx->PUPDR |= (GPIO_PuPd_UP << (i * 2));
}
}
else
{
//GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPDR0 << ((uint16_t)(*gpio & 0xFF) * 2));
//GPIOx->PUPDR |= (GPIO_PuPd_UP << ((*gpio & 0xFF) * 2));
}
*gpio &= ~GPIOPULLTYPEMASK;
*gpio |= gpiopulluptype;
break;
case gpiopulldowntype:
if((*gpio & 0xFF)==0xFF)
{
for(int i=0;i<16;i++)
{
//GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPDR0 << ((uint16_t)i * 2));
//GPIOx->PUPDR |= (GPIO_PuPd_DOWN << (i * 2));
}
}
else
{
//GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPDR0 << ((uint16_t)(*gpio & 0xFF) * 2));
//GPIOx->PUPDR |= (GPIO_PuPd_DOWN << ((*gpio & 0xFF) * 2));
}
*gpio &= ~GPIOPULLTYPEMASK;
*gpio |= gpiopulldowntype;
break;
default :
if((*gpio & 0xFF)==0xFF)
{
for(int i=0;i<16;i++)
{
//GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPDR0 << ((uint16_t)i * 2));
//GPIOx->PUPDR |= (GPIO_PuPd_NOPULL << (i * 2));
}
}
else
{
//GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPDR0 << ((uint16_t)(*gpio & 0xFF) * 2));
//GPIOx->PUPDR |= (GPIO_PuPd_NOPULL << ((*gpio & 0xFF) * 2));
}
*gpio &= ~GPIOPULLTYPEMASK;
*gpio |= gpionopulltype;
break;
}
}
void gpioset(gpio_t gpio)
{
//GPIO_TypeDef* GPIOx = GPIOGETPORT(gpio);
if((gpio & 0xFF)==0xFF)
{
//GPIOx->BSRRL = -1;
}
else
{
//GPIOx->BSRRL = 1<<(gpio & 0xFF);
}
}
void gpioclr(gpio_t gpio)
{
//GPIO_TypeDef* GPIOx = GPIOGETPORT(gpio);
if((gpio & 0xFF)==0xFF)
{
//GPIOx->BSRRH = -1;
}
else
{
//GPIOx->BSRRH = 1<<(gpio & 0xFF);
}
}
void gpiosetval(gpio_t gpio,int val)
{
//GPIO_TypeDef* GPIOx = GPIOGETPORT(gpio);
if((gpio & 0xFF)==0xFF)
{
//GPIOx->ODR = val;
}
else
{
//GPIOx->ODR = (val & 1)<<(gpio & 0xFF);
}
}
int gpiogetval(gpio_t gpio)
{
//GPIO_TypeDef* GPIOx = GPIOGETPORT(gpio);
if((gpio & 0xFF)==0xFF)
{
//return GPIOx->IDR;
}
else
{
//return ((GPIOx->IDR>>(gpio & 0xFF)) & 1);
}
}