tinySA/ports/MSP430/pal_lld.c

/*
    ChibiOS/RT - Copyright (C) 2006-2007 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 ports/MSP430/pal_lld.c
 * @brief MSP430 Digital I/O low level driver code
 * @addtogroup MSP430_PAL
 * @{
 */

#include <ch.h>
#include <pal.h>

/**
 * @brief MSP430 I/O ports configuration.
 *
 * @param[in] config the MSP430 ports configuration
 *
 * @note The @p PxIFG, @p PxIE and @p PxSEL registers are cleared. @p PxOUT
 *       and @p PxDIR are configured as specified.
 */
void _pal_lld_init(const MSP430DIOConfig *config) {

#if defined(__MSP430_HAS_PORT1__) || defined(__MSP430_HAS_PORT1_R__)
  IOPORT_A->iop_full.ie.reg_p = 0;
  IOPORT_A->iop_full.ifg.reg_p = 0;
  IOPORT_A->iop_full.sel.reg_p = 0;
  IOPORT_A->iop_common.out = config->P1Data.out;
  IOPORT_A->iop_common.dir = config->P1Data.dir;
#endif

#if defined(__MSP430_HAS_PORT2__) || defined(__MSP430_HAS_PORT2_R__)
  IOPORT_B->iop_full.ie.reg_p = 0;
  IOPORT_B->iop_full.ifg.reg_p = 0;
  IOPORT_B->iop_full.sel.reg_p = 0;
  IOPORT_B->iop_common.out = config->P2Data.out;
  IOPORT_B->iop_common.dir = config->P2Data.dir;
#endif

#if defined(__MSP430_HAS_PORT3__) || defined(__MSP430_HAS_PORT3_R__)
  IOPORT_C->iop_simple.sel.reg_p = 0;
  IOPORT_C->iop_common.out = config->P3Data.out;
  IOPORT_C->iop_common.dir = config->P3Data.dir;
#endif

#if defined(__MSP430_HAS_PORT4__) || defined(__MSP430_HAS_PORT4_R__)
  IOPORT_D->iop_simple.sel.reg_p = 0;
  IOPORT_D->iop_common.out = config->P4Data.out;
  IOPORT_D->iop_common.dir = config->P4Data.dir;
#endif

#if defined(__MSP430_HAS_PORT5__) || defined(__MSP430_HAS_PORT5_R__)
  IOPORT_E->iop_simple.sel.reg_p = 0;
  IOPORT_E->iop_common.out = config->P5Data.out;
  IOPORT_E->iop_common.dir = config->P5Data.dir;
#endif

#if defined(__MSP430_HAS_PORT6__) || defined(__MSP430_HAS_PORT6_R__)
  IOPORT_F->iop_simple.sel.reg_p = 0;
  IOPORT_F->iop_common.out = config->P6Data.out;
  IOPORT_F->iop_common.dir = config->P6Data.dir;
#endif
}

/**
 * @brief Pads mode setup.
 * @details This function programs a pads group belonging to the same port
 *          with the specified mode.
 *
 * @param[in] port the port identifier
 * @param[in] mask the group mask
 * @param[in] mode the mode
 *
 * @note This function is not meant to be invoked directly by the application
 *       code.
 * @note @p PAL_MODE_UNCONNECTED is implemented as output as recommended by
 *       the MSP430x1xx Family User's Guide. Unconnected pads are set to
 *       high logic state by default.
 * @note This function does not alter the @p PxSEL registers. Alternate
 *       functions setup must be handled by device-specific code.
 */
void _pal_lld_setgroupmode(ioportid_t port,
                           ioportmask_t mask,
                           uint_fast8_t mode) {

  switch (mode) {
  case PAL_MODE_RESET:
  case PAL_MODE_INPUT:
    port->iop_common.dir.reg_p &= ~mask;
    break;
  case PAL_MODE_UNCONNECTED:
    port->iop_common.out.reg_p |= mask;
  case PAL_MODE_OUTPUT_PUSHPULL:
    port->iop_common.dir.reg_p |= mask;
    break;
  }
}

/** @} */