pal_lld.c
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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT 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.
ChibiOS/RT 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, see <http://www.gnu.org/licenses/>.
---
A special exception to the GPL can be applied should you wish to distribute
a combined work that includes ChibiOS/RT, without being obliged to provide
the source code for any proprietary components. See the file exception.txt
for full details of how and when the exception can be applied.
*/
/**
* @file STM32/GPIOv2/pal_lld.c
* @brief STM32L1xx/STM32F2xx/STM32F4xx GPIO low level driver code.
*
* @addtogroup PAL
* @{
*/
#include "ch.h"
#include "hal.h"
#if HAL_USE_PAL || defined(__DOXYGEN__)
#if defined(STM32L1XX_MD)
#define AHB_EN_MASK (RCC_AHBENR_GPIOAEN | RCC_AHBENR_GPIOBEN | \
RCC_AHBENR_GPIOCEN | RCC_AHBENR_GPIODEN | \
RCC_AHBENR_GPIOEEN | RCC_AHBENR_GPIOHEN)
#elif defined(STM32F2XX)
#define AHB1_EN_MASK (RCC_AHB1ENR_GPIOAEN | RCC_AHB1ENR_GPIOBEN | \
RCC_AHB1ENR_GPIOCEN | RCC_AHB1ENR_GPIODEN | \
RCC_AHB1ENR_GPIOEEN | RCC_AHB1ENR_GPIOFEN | \
RCC_AHB1ENR_GPIOGEN | RCC_AHB1ENR_GPIOHEN | \
RCC_AHB1ENR_GPIOIEN)
#define AHB1_LPEN_MASK AHB1_EN_MASK
#elif defined(STM32F4XX)
#define AHB1_EN_MASK (RCC_AHB1ENR_GPIOAEN | RCC_AHB1ENR_GPIOBEN | \
RCC_AHB1ENR_GPIOCEN | RCC_AHB1ENR_GPIODEN | \
RCC_AHB1ENR_GPIOEEN | RCC_AHB1ENR_GPIOFEN | \
RCC_AHB1ENR_GPIOGEN | RCC_AHB1ENR_GPIOHEN | \
RCC_AHB1ENR_GPIOIEN)
#define AHB1_LPEN_MASK AHB1_EN_MASK
#else
#error "missing or unsupported platform for GPIOv2 PAL driver"
#endif
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
static void initgpio(GPIO_TypeDef *gpiop, const stm32_gpio_setup_t *config) {
gpiop->ODR = config->odr;
gpiop->MODER = config->moder;
gpiop->OTYPER = config->otyper;
gpiop->OSPEEDR = config->ospeedr;
gpiop->PUPDR = config->pupdr;
gpiop->AFRL = config->afrl;
gpiop->AFRH = config->afrh;
}
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief STM32 I/O ports configuration.
* @details Ports A-D(E, F, G, H) clocks enabled.
*
* @param[in] config the STM32 ports configuration
*
* @notapi
*/
void _pal_lld_init(const PALConfig *config) {
/*
* Enables the GPIO related clocks.
*/
#if defined(STM32L1XX_MD)
rccEnableAHB(AHB_EN_MASK, TRUE);
#elif defined(STM32F2XX) || defined(STM32F4XX)
RCC->AHB1ENR |= AHB1_EN_MASK;
RCC->AHB1LPENR |= AHB1_LPEN_MASK;
#endif
/*
* Initial GPIO setup.
*/
initgpio(GPIOA, &config->PAData);
initgpio(GPIOB, &config->PBData);
initgpio(GPIOC, &config->PCData);
initgpio(GPIOD, &config->PDData);
#if STM32_HAS_GPIOE
initgpio(GPIOE, &config->PEData);
#endif
#if STM32_HAS_GPIOF
initgpio(GPIOF, &config->PFData);
#endif
#if STM32_HAS_GPIOG
initgpio(GPIOG, &config->PGData);
#endif
#if STM32_HAS_GPIOH
initgpio(GPIOH, &config->PHData);
#endif
#if STM32_HAS_GPIOI
initgpio(GPIOI, &config->PIData);
#endif
}
/**
* @brief Pads mode setup.
* @details This function programs a pads group belonging to the same port
* with the specified mode.
* @note @p PAL_MODE_UNCONNECTED is implemented as push pull at minimum
* speed.
*
* @param[in] port the port identifier
* @param[in] mask the group mask
* @param[in] mode the mode
*
* @notapi
*/
#if 1
void _pal_lld_setgroupmode(ioportid_t port,
ioportmask_t mask,
iomode_t mode) {
uint32_t moder = (mode & PAL_STM32_MODE_MASK) >> 0;
uint32_t otyper = (mode & PAL_STM32_OTYPE_MASK) >> 2;
uint32_t ospeedr = (mode & PAL_STM32_OSPEED_MASK) >> 3;
uint32_t pupdr = (mode & PAL_STM32_PUDR_MASK) >> 5;
uint32_t altr = (mode & PAL_STM32_ALTERNATE_MASK) >> 7;
uint32_t bit = 0;
while (TRUE) {
if ((mask & 1) != 0) {
uint32_t altrmask, m1, m2, m4;
altrmask = altr << ((bit & 7) * 4);
m4 = 15 << ((bit & 7) * 4);
if (bit < 8)
port->AFRL = (port->AFRL & ~m4) | altrmask;
else
port->AFRH = (port->AFRH & ~m4) | altrmask;
m1 = 1 << bit;
port->OTYPER = (port->OTYPER & ~m1) | otyper;
m2 = 3 << (bit * 2);
port->OSPEEDR = (port->OSPEEDR & ~m2) | ospeedr;
port->PUPDR = (port->PUPDR & ~m2) | pupdr;
port->MODER = (port->MODER & ~m2) | moder;
}
mask >>= 1;
if (!mask)
return;
otyper <<= 1;
ospeedr <<= 2;
pupdr <<= 2;
moder <<= 2;
bit++;
}
}
#else
void _pal_lld_setgroupmode(ioportid_t port,
ioportmask_t mask,
iomode_t mode) {
uint32_t afrm, moderm, pupdrm, otyperm, ospeedrm;
uint32_t m1 = (uint32_t)mask;
uint32_t m2 = 0;
uint32_t m4l = 0;
uint32_t m4h = 0;
uint32_t bit = 0;
do {
if ((mask & 1) != 0) {
m2 |= 3 << bit;
if (bit < 16)
m4l |= 15 << ((bit & 14) * 2);
else
m4h |= 15 << ((bit & 14) * 2);
}
bit += 2;
mask >>= 1;
} while (mask);
afrm = ((mode & PAL_STM32_ALTERNATE_MASK) >> 7) * 0x1111;
port->AFRL = (port->AFRL & ~m4l) | (afrm & m4l);
port->AFRH = (port->AFRH & ~m4h) | (afrm & m4h);
ospeedrm = ((mode & PAL_STM32_OSPEED_MASK) >> 3) * 0x5555;
port->OSPEEDR = (port->OSPEEDR & ~m2) | (ospeedrm & m2);
otyperm = ((mode & PAL_STM32_OTYPE_MASK) >> 2) * 0xffff;
port->OTYPER = (port->OTYPER & ~m1) | (otyperm & m1);
pupdrm = ((mode & PAL_STM32_PUDR_MASK) >> 5) * 0x5555;
port->PUPDR = (port->PUPDR & ~m2) | (pupdrm & m2);
moderm = ((mode & PAL_STM32_MODE_MASK) >> 0) * 0x5555;
port->MODER = (port->MODER & ~m2) | (moderm & m2);
}
#endif
#endif /* HAL_USE_PAL */
/** @} */