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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/>.
*/
/**
* @file SPC560Pxx/hal_lld.c
* @brief SPC560Pxx HAL subsystem low level driver source.
*
* @addtogroup HAL
* @{
*/
#include "ch.h"
#include "hal.h"
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief Low level HAL driver initialization.
*
* @notapi
*/
void hal_lld_init(void) {
/* The system is switched to the RUN0 mode, the default for normal
operations.*/
if (halSPC560PSetRunMode(SPC560P_RUNMODE_RUN0) == CH_FAILED)
chSysHalt();
}
/**
* @brief SPC560Pxx clocks and PLL initialization.
* @note All the involved constants come from the file @p board.h and
* @p hal_lld.h
* @note This function must be invoked only after the system reset.
*
* @special
*/
void spc560p_clock_init(void) {
/* Waiting for IRC stabilization before attempting anything else.*/
while (!ME.GS.B.S_RC)
;
#if !SPC560P_NO_INIT
#if defined(SPC560P_OSC_BYPASS)
/* If the board is equipped with an oscillator instead of a xtal then the
bypass must be activated.*/
CGM.OSC_CTL.B.OSCBYP = TRUE;
#endif /* SPC560P_ENABLE_XOSC */
/* Initialization of the FMPLLs settings.*/
CGM.FMPLL[0].CR.R = SPC560P_FMPLL0_ODF |
(SPC560P_FMPLL0_IDF_VALUE << 26) |
(SPC560P_FMPLL0_NDIV_VALUE << 16);
CGM.FMPLL[0].MR.R = 0; /* TODO: Add a setting. */
CGM.FMPLL[1].CR.R = SPC560P_FMPLL1_ODF |
(SPC560P_FMPLL1_IDF_VALUE << 26) |
(SPC560P_FMPLL1_NDIV_VALUE << 16);
CGM.FMPLL[1].MR.R = 0; /* TODO: Add a setting. */
/* Run modes initialization.*/
ME.MER.R = SPC560P_ME_ME_BITS; /* Enabled run modes. */
ME.TEST.R = SPC560P_ME_TEST_MC_BITS; /* TEST run mode. */
ME.SAFE.R = SPC560P_ME_SAFE_MC_BITS; /* SAFE run mode. */
ME.DRUN.R = SPC560P_ME_DRUN_MC_BITS; /* DRUN run mode. */
ME.RUN[0].R = SPC560P_ME_RUN0_MC_BITS; /* RUN0 run mode. */
ME.RUN[1].R = SPC560P_ME_RUN1_MC_BITS; /* RUN0 run mode. */
ME.RUN[2].R = SPC560P_ME_RUN2_MC_BITS; /* RUN0 run mode. */
ME.RUN[3].R = SPC560P_ME_RUN3_MC_BITS; /* RUN0 run mode. */
ME.HALT0.R = SPC560P_ME_HALT0_MC_BITS; /* HALT0 run mode. */
ME.STOP0.R = SPC560P_ME_STOP0_MC_BITS; /* STOP0 run mode. */
/* Switches again to DRUN mode (current mode) in order to update the
settings.*/
if (halSPC560PSetRunMode(SPC560P_RUNMODE_DRUN) == CH_FAILED)
chSysHalt();
#endif /* !SPC560P_NO_INIT */
}
/**
* @brief Switches the system to the specified run mode.
*/
bool_t halSPC560PSetRunMode(spc560prunmode_t mode) {
/* Starts a transition process.*/
ME.MCTL.R = SPC560P_ME_MCTL_MODE(mode) | SPC560P_ME_MCTL_KEY;
ME.MCTL.R = SPC560P_ME_MCTL_MODE(mode) | SPC560P_ME_MCTL_KEY_INV;
/* Waits the transition process to start.*/
while (!ME.GS.B.S_MTRANS)
;
/* Waits the transition process to end.*/
while (ME.GS.B.S_MTRANS)
;
/* Verifies that the mode has been effectively switched.*/
if (ME.GS.B.S_CURRENTMODE != mode)
return TRUE;
return FALSE;
}
/** @} */
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