/* ---------------------------------------------------------------------------- | |
* ATMEL Microcontroller Software Support | |
* ---------------------------------------------------------------------------- | |
* Copyright (c) 2008, Atmel Corporation | |
* | |
* All rights reserved. | |
* | |
* Redistribution and use in source and binary forms, with or without | |
* modification, are permitted provided that the following conditions are met: | |
* | |
* - Redistributions of source code must retain the above copyright notice, | |
* this list of conditions and the disclaimer below. | |
* | |
* Atmel's name may not be used to endorse or promote products derived from | |
* this software without specific prior written permission. | |
* | |
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR | |
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE | |
* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, | |
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, | |
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, | |
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
* ---------------------------------------------------------------------------- | |
*/ | |
//----------------------------------------------------------------------------- | |
// Headers | |
//----------------------------------------------------------------------------- | |
#include <board.h> | |
//----------------------------------------------------------------------------- | |
// Macros | |
//----------------------------------------------------------------------------- | |
/// WRITE_RSTC: Write RSTC register | |
#define WRITE_RSTC(pRstc, regName, value) pRstc->regName = (value) | |
/// READ_RSTC: Read RSTC registers | |
#define READ_RSTC(pRstc, regName) (pRstc->regName) | |
//----------------------------------------------------------------------------- | |
// Defines | |
//----------------------------------------------------------------------------- | |
/// Keywords to write to the reset registers | |
#define RSTC_KEY_PASSWORD (0xA5UL << 24) | |
//----------------------------------------------------------------------------- | |
// Exported functions | |
//----------------------------------------------------------------------------- | |
//----------------------------------------------------------------------------- | |
/// Configure the mode of the RSTC peripheral. | |
/// The configuration is computed by the lib (AT91C_RSTC_*). | |
/// \param rstc Pointer to an RSTC peripheral. | |
/// \param rmr Desired mode configuration. | |
//----------------------------------------------------------------------------- | |
void RSTC_ConfigureMode(AT91PS_RSTC rstc, unsigned int rmr) | |
{ | |
rmr &= ~AT91C_RSTC_KEY; | |
WRITE_RSTC(rstc, RSTC_RMR, rmr | RSTC_KEY_PASSWORD); | |
} | |
//----------------------------------------------------------------------------- | |
/// Enable/Disable the detection of a low level on the pin NRST as User Reset | |
/// \param rstc Pointer to an RSTC peripheral. | |
/// \param enable 1 to enable & 0 to disable. | |
//----------------------------------------------------------------------------- | |
void RSTC_SetUserResetEnable(AT91PS_RSTC rstc, unsigned char enable) | |
{ | |
unsigned int rmr = READ_RSTC(rstc, RSTC_RMR) & (~AT91C_RSTC_KEY); | |
if (enable) { | |
rmr |= AT91C_RSTC_URSTEN; | |
} | |
else { | |
rmr &= ~AT91C_RSTC_URSTEN; | |
} | |
WRITE_RSTC(rstc, RSTC_RMR, rmr | RSTC_KEY_PASSWORD); | |
} | |
//----------------------------------------------------------------------------- | |
/// Enable/Disable the interrupt of a User Reset (USRTS bit in RSTC_RST). | |
/// \param rstc Pointer to an RSTC peripheral. | |
/// \param enable 1 to enable & 0 to disable. | |
//----------------------------------------------------------------------------- | |
void RSTC_SetUserResetInterruptEnable(AT91PS_RSTC rstc, unsigned char enable) | |
{ | |
unsigned int rmr = READ_RSTC(rstc, RSTC_RMR) & (~AT91C_RSTC_KEY); | |
if (enable) { | |
rmr |= AT91C_RSTC_URSTIEN; | |
} | |
else { | |
rmr &= ~AT91C_RSTC_URSTIEN; | |
} | |
WRITE_RSTC(rstc, RSTC_RMR, rmr | RSTC_KEY_PASSWORD); | |
} | |
//----------------------------------------------------------------------------- | |
/// Setup the external reset length. The length is asserted during a time of | |
/// pow(2, powl+1) Slow Clock(32KHz). The duration is between 60us and 2s. | |
/// \param rstc Pointer to an RSTC peripheral. | |
/// \param powl Power length defined. | |
//----------------------------------------------------------------------------- | |
void RSTC_SetExtResetLength(AT91PS_RSTC rstc, unsigned char powl) | |
{ | |
unsigned int rmr = READ_RSTC(rstc, RSTC_RMR); | |
rmr &= ~(AT91C_RSTC_KEY | AT91C_RSTC_ERSTL); | |
rmr |= (powl << 8) & AT91C_RSTC_ERSTL; | |
WRITE_RSTC(rstc, RSTC_RMR, rmr | RSTC_KEY_PASSWORD); | |
} | |
//----------------------------------------------------------------------------- | |
/// Resets the processor. | |
/// \param rstc Pointer to an RSTC peripheral. | |
//----------------------------------------------------------------------------- | |
void RSTC_ProcessorReset(AT91PS_RSTC rstc) | |
{ | |
WRITE_RSTC(rstc, RSTC_RCR, AT91C_RSTC_PROCRST | RSTC_KEY_PASSWORD); | |
} | |
//----------------------------------------------------------------------------- | |
/// Resets the peripherals. | |
/// \param rstc Pointer to an RSTC peripheral. | |
//----------------------------------------------------------------------------- | |
void RSTC_PeripheralReset(AT91PS_RSTC rstc) | |
{ | |
WRITE_RSTC(rstc, RSTC_RCR, AT91C_RSTC_PERRST | RSTC_KEY_PASSWORD); | |
} | |
//----------------------------------------------------------------------------- | |
/// Asserts the NRST pin for external resets. | |
/// \param rstc Pointer to an RSTC peripheral. | |
//----------------------------------------------------------------------------- | |
void RSTC_ExtReset(AT91PS_RSTC rstc) | |
{ | |
WRITE_RSTC(rstc, RSTC_RCR, AT91C_RSTC_EXTRST | RSTC_KEY_PASSWORD); | |
} | |
//----------------------------------------------------------------------------- | |
/// Return NRST pin level ( 1 or 0 ). | |
/// \param rstc Pointer to an RSTC peripheral. | |
//----------------------------------------------------------------------------- | |
unsigned char RSTC_GetNrstLevel(AT91PS_RSTC rstc) | |
{ | |
if (READ_RSTC(rstc, RSTC_RSR) & AT91C_RSTC_NRSTL) { | |
return 1; | |
} | |
return 0; | |
} | |
//----------------------------------------------------------------------------- | |
/// Returns 1 if at least one high-to-low transition of NRST (User Reset) has | |
/// been detected since the last read of RSTC_RSR. | |
/// \param rstc Pointer to an RSTC peripheral. | |
//----------------------------------------------------------------------------- | |
unsigned char RSTC_IsUserReseetDetected(AT91PS_RSTC rstc) | |
{ | |
if (READ_RSTC(rstc, RSTC_RSR) & AT91C_RSTC_URSTS) { | |
return 1; | |
} | |
return 0; | |
} | |
//----------------------------------------------------------------------------- | |
/// Return 1 if a software reset command is being performed by the reset | |
/// controller. The reset controller is busy. | |
/// \param rstc Pointer to an RSTC peripheral. | |
//----------------------------------------------------------------------------- | |
unsigned char RSTC_IsBusy(AT91PS_RSTC rstc) | |
{ | |
if (READ_RSTC(rstc, RSTC_RSR) & AT91C_RSTC_SRCMP) { | |
return 1; | |
} | |
return 0; | |
} |