155 lines
5.8 KiB
C
155 lines
5.8 KiB
C
/*
|
|
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/>.
|
|
*/
|
|
|
|
/**
|
|
* @file AT91SAM7/pal_lld.c
|
|
* @brief AT91SAM7 PIO low level driver code.
|
|
*
|
|
* @addtogroup PAL
|
|
* @{
|
|
*/
|
|
|
|
#include "ch.h"
|
|
#include "hal.h"
|
|
|
|
#if HAL_USE_PAL || defined(__DOXYGEN__)
|
|
|
|
/*===========================================================================*/
|
|
/* Driver exported variables. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver local variables. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver local functions. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver interrupt handlers. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver exported functions. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief AT91SAM7 I/O ports configuration.
|
|
* @details PIO registers initialization.
|
|
*
|
|
* @param[in] config the AT91SAM7 ports configuration
|
|
*
|
|
* @notapi
|
|
*/
|
|
void _pal_lld_init(const PALConfig *config) {
|
|
|
|
uint32_t ports = (1 << AT91C_ID_PIOA);
|
|
#if (SAM7_PLATFORM == SAM7X128) || (SAM7_PLATFORM == SAM7X256) || \
|
|
(SAM7_PLATFORM == SAM7X512)
|
|
ports |= (1 << AT91C_ID_PIOB);
|
|
#endif
|
|
AT91C_BASE_PMC->PMC_PCER = ports;
|
|
|
|
/*
|
|
* PIOA setup.
|
|
*/
|
|
AT91C_BASE_PIOA->PIO_PPUER = config->P0Data.pusr; /* Pull-up as spec.*/
|
|
AT91C_BASE_PIOA->PIO_PPUDR = ~config->P0Data.pusr;
|
|
AT91C_BASE_PIOA->PIO_PER = 0xFFFFFFFF; /* PIO enabled.*/
|
|
AT91C_BASE_PIOA->PIO_ODSR = config->P0Data.odsr; /* Data as specified.*/
|
|
AT91C_BASE_PIOA->PIO_OER = config->P0Data.osr; /* Dir. as specified.*/
|
|
AT91C_BASE_PIOA->PIO_ODR = ~config->P0Data.osr;
|
|
AT91C_BASE_PIOA->PIO_IFDR = 0xFFFFFFFF; /* Filter disabled.*/
|
|
AT91C_BASE_PIOA->PIO_IDR = 0xFFFFFFFF; /* Int. disabled.*/
|
|
AT91C_BASE_PIOA->PIO_MDDR = 0xFFFFFFFF; /* Push Pull drive.*/
|
|
AT91C_BASE_PIOA->PIO_ASR = 0xFFFFFFFF; /* Peripheral A.*/
|
|
AT91C_BASE_PIOA->PIO_OWER = 0xFFFFFFFF; /* Write enabled.*/
|
|
|
|
/*
|
|
* PIOB setup.
|
|
*/
|
|
#if (SAM7_PLATFORM == SAM7X128) || (SAM7_PLATFORM == SAM7X256) || \
|
|
(SAM7_PLATFORM == SAM7X512)
|
|
AT91C_BASE_PIOB->PIO_PPUER = config->P1Data.pusr; /* Pull-up as spec.*/
|
|
AT91C_BASE_PIOB->PIO_PPUDR = ~config->P1Data.pusr;
|
|
AT91C_BASE_PIOB->PIO_PER = 0xFFFFFFFF; /* PIO enabled.*/
|
|
AT91C_BASE_PIOB->PIO_ODSR = config->P1Data.odsr; /* Data as specified.*/
|
|
AT91C_BASE_PIOB->PIO_OER = config->P1Data.osr; /* Dir. as specified.*/
|
|
AT91C_BASE_PIOB->PIO_ODR = ~config->P1Data.osr;
|
|
AT91C_BASE_PIOB->PIO_IFDR = 0xFFFFFFFF; /* Filter disabled.*/
|
|
AT91C_BASE_PIOB->PIO_IDR = 0xFFFFFFFF; /* Int. disabled.*/
|
|
AT91C_BASE_PIOB->PIO_MDDR = 0xFFFFFFFF; /* Push Pull drive.*/
|
|
AT91C_BASE_PIOB->PIO_ASR = 0xFFFFFFFF; /* Peripheral A.*/
|
|
AT91C_BASE_PIOB->PIO_OWER = 0xFFFFFFFF; /* Write enabled.*/
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* @brief Pads mode setup.
|
|
* @details This function programs a pads group belonging to the same port
|
|
* with the specified mode.
|
|
* @note This function is not meant to be invoked directly from the
|
|
* application code.
|
|
* @note @p PAL_MODE_RESET is implemented as input with pull-up.
|
|
* @note @p PAL_MODE_UNCONNECTED is implemented as push pull output with
|
|
* high state.
|
|
* @note @p PAL_MODE_OUTPUT_OPENDRAIN also enables the pull-up resistor.
|
|
*
|
|
* @param[in] port the port identifier
|
|
* @param[in] mask the group mask
|
|
* @param[in] mode the mode
|
|
*
|
|
* @notapi
|
|
*/
|
|
void _pal_lld_setgroupmode(ioportid_t port,
|
|
ioportmask_t mask,
|
|
iomode_t mode) {
|
|
|
|
switch (mode) {
|
|
case PAL_MODE_RESET:
|
|
case PAL_MODE_INPUT_PULLUP:
|
|
port->PIO_PPUER = mask;
|
|
port->PIO_ODR = mask;
|
|
break;
|
|
case PAL_MODE_INPUT:
|
|
case PAL_MODE_INPUT_ANALOG:
|
|
port->PIO_PPUDR = mask;
|
|
port->PIO_ODR = mask;
|
|
break;
|
|
case PAL_MODE_UNCONNECTED:
|
|
port->PIO_SODR = mask;
|
|
/* Falls in */
|
|
case PAL_MODE_OUTPUT_PUSHPULL:
|
|
port->PIO_PPUDR = mask;
|
|
port->PIO_OER = mask;
|
|
port->PIO_MDDR = mask;
|
|
break;
|
|
case PAL_MODE_OUTPUT_OPENDRAIN:
|
|
port->PIO_PPUER = mask;
|
|
port->PIO_OER = mask;
|
|
port->PIO_MDER = mask;
|
|
}
|
|
}
|
|
|
|
#endif /* HAL_USE_PAL */
|
|
|
|
/** @} */
|