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reference/driverlib/prcm.c

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2019-10-09 11:45:38 +00:00
//*****************************************************************************
//
// prcm.c
//
// Driver for the Power, Reset and Clock Module (PRCM)
//
// Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
//
//
// 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 following disclaimer.
//
// Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the
// distribution.
//
// Neither the name of Texas Instruments Incorporated nor the names of
// its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS 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.
//
//*****************************************************************************
//*****************************************************************************
//
//! \addtogroup PRCM_Power_Reset_Clock_Module_api
//! @{
//
//*****************************************************************************
#include "inc/hw_types.h"
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "inc/hw_apps_rcm.h"
#include "inc/hw_gprcm.h"
#include "inc/hw_hib1p2.h"
#include "inc/hw_hib3p3.h"
#include "inc/hw_common_reg.h"
#include "prcm.h"
#include "interrupt.h"
#include "cpu.h"
#include "flash.h"
#include "utils.h"
//*****************************************************************************
// Macro definition
//*****************************************************************************
#define PRCM_SOFT_RESET 0x00000001
#define PRCM_ENABLE_STATUS 0x00000002
#define SYS_CLK 80000000
#define XTAL_CLK 40000000
//*****************************************************************************
// CC3200 does not have a true RTC capability. However, API(s) in this file
// provide an effective mechanism to support RTC feature in the device.
//
// The implementation to support RTC has been kept very simple. A set of
// HIB Memory Registers in conjunction with Slow Clock Counter are used
// to render RTC information to users. Core principle of design involves
// two steps (a) establish an association between user provided wall-clock
// and slow clock counter. (b) store reference value of this associattion
// in HIB Registers. This reference value and SCC value are then combined
// to create real-world calendar time.
//
// Across HIB cycles, value stored in HIB Registers is retained and slow
// clock counter continues to tick, thereby, this arragement is relevant
// and valid as long as device has a (tickle) battery power.
//
// Further, provision also has been made to set an alarm. When it RTC value
// matches that of set for alarm, an interrupt is generated.
//
// HIB MEM REG0 and REG1 are reserved for TI.
//
// If RTC feature is not used, then HIB REG2 & REG3 are available to user.
//
// Lower half of REG0 is used for TI HW ECO.
//*****************************************************************************
#define RTC_U64MSEC_MK(u32Secs, u16Msec) (((unsigned long long)u32Secs << 10)|\
(u16Msec & 0x3FF))
#define RTC_SECS_IN_U64MSEC(u64Msec) ((unsigned long)(u64Msec >> 10))
#define RTC_MSEC_IN_U64MSEC(u64Msec) ((unsigned short)(u64Msec & 0x3FF))
#define RTC_SECS_U32_REG_ADDR (HIB3P3_BASE + HIB3P3_O_MEM_HIB_REG3)
#define RTC_MSEC_U16_REG_ADDR (HIB3P3_BASE + HIB3P3_O_MEM_HIB_REG2+2)
#define RTC_U32SECS_REG (HWREG(RTC_SECS_U32_REG_ADDR))
#define RTC_U16MSEC_REG (*(unsigned short*)RTC_MSEC_U16_REG_ADDR)
//*****************************************************************************
// Register Access and Updates
//
// Tick of SCC has a resolution of 32768Hz, meaning 1 sec is equal to 32768
// clock ticks. Ideal way of getting time in millisecond will involve floating
// point arithmetic (division by 32.768). To avoid this, we simply divide it by
// 32, which will give a range from 0 -1023(instead of 0-999). To use this
// output correctly we have to take care of this inaccuracy externally.
// following wrapper can be used to convert the value from cycles to
// millisecond:
//
// CYCLES_U16MS(cycles) ((cycles *1000)/ 1024),
//
// Similarly, before setting the value, it must be first converted (from ms to
// cycles).
//
// U16MS_CYCLES(msec) ((msec *1024)/1000)
//
// Note: There is a precision loss of 1 ms with the above scheme.
//
//*****************************************************************************
#define SCC_U64MSEC_GET() (PRCMSlowClkCtrGet() >> 5)
#define SCC_U64MSEC_MATCH_SET(u64Msec) (PRCMSlowClkCtrMatchSet(u64Msec << 5))
#define SCC_U64MSEC_MATCH_GET() (PRCMSlowClkCtrMatchGet() >> 5)
//*****************************************************************************
//
// Bit: 31 is used to indicate use of RTC. If set as '1', RTC feature is used.
// Bits: 30 to 26 are reserved, available to software for use
// Bits: 25 to 16 are used to save millisecond part of RTC reference.
// Bits: 15 to 0 are being used for HW Changes / ECO
//
//*****************************************************************************
//*****************************************************************************
// Set RTC USE Bit
//*****************************************************************************
static void RTCUseSet(void)
{
unsigned short usRegValue;
usRegValue = RTC_U16MSEC_REG | (1 << 15);
UtilsDelay((80*200)/3);
RTC_U16MSEC_REG = usRegValue;
}
//*****************************************************************************
// Checks if RTC-USE bit is set
//*****************************************************************************
static tBoolean IsRTCUsed(void)
{
unsigned short usRegValue;
usRegValue = RTC_U16MSEC_REG;
UtilsDelay((80*200)/3);
return ((usRegValue & (1 << 15))? true : false);
}
//*****************************************************************************
// Read 16-bit mSecs
//*****************************************************************************
static unsigned short RTCU16MSecRegRead(void)
{
unsigned short usRegValue;
usRegValue = RTC_U16MSEC_REG;
UtilsDelay((80*200)/3);
return (usRegValue & 0x3FF);
}
//*****************************************************************************
// Write 16-bit mSecs
//*****************************************************************************
static void RTCU16MSecRegWrite(unsigned short u16Msec)
{
unsigned short usRegValue;
usRegValue = RTC_U16MSEC_REG;
UtilsDelay((80*200)/3);
RTC_U16MSEC_REG = ((usRegValue & ~0x3FF) |u16Msec);
}
//*****************************************************************************
// Read 32-bit Secs
//*****************************************************************************
static unsigned long RTCU32SecRegRead(void)
{
return (PRCMHIBRegRead(RTC_SECS_U32_REG_ADDR));
}
//*****************************************************************************
// Write 32-bit Secs
//*****************************************************************************
static void RTCU32SecRegWrite(unsigned long u32Msec)
{
PRCMHIBRegWrite(RTC_SECS_U32_REG_ADDR, u32Msec);
}
//*****************************************************************************
// Macros
//*****************************************************************************
#define IS_RTC_USED() IsRTCUsed()
#define RTC_USE_SET() RTCUseSet()
#define RTC_U16MSEC_REG_RD() RTCU16MSecRegRead()
#define RTC_U16MSEC_REG_WR(u16Msec) RTCU16MSecRegWrite(u16Msec)
#define RTC_U32SECS_REG_RD() RTCU32SecRegRead()
#define RTC_U32SECS_REG_WR(u32Secs) RTCU32SecRegWrite(u32Secs)
#define SELECT_SCC_U42BITS(u64Msec) (u64Msec & 0x3ffffffffff)
//*****************************************************************************
// Global Peripheral clock and rest Registers
//*****************************************************************************
static const PRCM_PeriphRegs_t PRCM_PeriphRegsList[] =
{
{APPS_RCM_O_CAMERA_CLK_GATING, APPS_RCM_O_CAMERA_SOFT_RESET },
{APPS_RCM_O_MCASP_CLK_GATING, APPS_RCM_O_MCASP_SOFT_RESET },
{APPS_RCM_O_MMCHS_CLK_GATING, APPS_RCM_O_MMCHS_SOFT_RESET },
{APPS_RCM_O_MCSPI_A1_CLK_GATING, APPS_RCM_O_MCSPI_A1_SOFT_RESET },
{APPS_RCM_O_MCSPI_A2_CLK_GATING, APPS_RCM_O_MCSPI_A2_SOFT_RESET },
{APPS_RCM_O_UDMA_A_CLK_GATING, APPS_RCM_O_UDMA_A_SOFT_RESET },
{APPS_RCM_O_GPIO_A_CLK_GATING, APPS_RCM_O_GPIO_A_SOFT_RESET },
{APPS_RCM_O_GPIO_B_CLK_GATING, APPS_RCM_O_GPIO_B_SOFT_RESET },
{APPS_RCM_O_GPIO_C_CLK_GATING, APPS_RCM_O_GPIO_C_SOFT_RESET },
{APPS_RCM_O_GPIO_D_CLK_GATING, APPS_RCM_O_GPIO_D_SOFT_RESET },
{APPS_RCM_O_GPIO_E_CLK_GATING, APPS_RCM_O_GPIO_E_SOFT_RESET },
{APPS_RCM_O_WDOG_A_CLK_GATING, APPS_RCM_O_WDOG_A_SOFT_RESET },
{APPS_RCM_O_UART_A0_CLK_GATING, APPS_RCM_O_UART_A0_SOFT_RESET },
{APPS_RCM_O_UART_A1_CLK_GATING, APPS_RCM_O_UART_A1_SOFT_RESET },
{APPS_RCM_O_GPT_A0_CLK_GATING , APPS_RCM_O_GPT_A0_SOFT_RESET },
{APPS_RCM_O_GPT_A1_CLK_GATING, APPS_RCM_O_GPT_A1_SOFT_RESET },
{APPS_RCM_O_GPT_A2_CLK_GATING, APPS_RCM_O_GPT_A2_SOFT_RESET },
{APPS_RCM_O_GPT_A3_CLK_GATING, APPS_RCM_O_GPT_A3_SOFT_RESET },
{APPS_RCM_O_CRYPTO_CLK_GATING, APPS_RCM_O_CRYPTO_SOFT_RESET },
{APPS_RCM_O_MCSPI_S0_CLK_GATING, APPS_RCM_O_MCSPI_S0_SOFT_RESET },
{APPS_RCM_O_I2C_CLK_GATING, APPS_RCM_O_I2C_SOFT_RESET }
};
//*****************************************************************************
//
//! Performs a software reset of a MCU and associated peripherals
//!
//! \param bIncludeSubsystem is \b true to reset associated peripherals.
//!
//! This function performs a software reset of a MCU and associated peripherals.
//! To reset the associated peripheral, the parameter \e bIncludeSubsystem
//! should be set to \b true.
//!
//! \return None.
//
//*****************************************************************************
void PRCMMCUReset(tBoolean bIncludeSubsystem)
{
if(bIncludeSubsystem)
{
//
// Reset Apps processor and associated peripheral
//
HWREG(GPRCM_BASE+ GPRCM_O_APPS_SOFT_RESET) = 0x2;
}
else
{
//
// Reset Apps processor only
//
HWREG(GPRCM_BASE+ GPRCM_O_APPS_SOFT_RESET) = 0x1;
}
//
// Wait for system to reset
//
__asm(" wfi\n");
//
// Infinite loop
//
while(1)
{
}
}
//*****************************************************************************
//
//! Gets the reason for a reset.
//!
//! This function returns the reason(s) for a reset. The reset reason are:-
//! -\b PRCM_POWER_ON - Device is powering up.
//! -\b PRCM_LPDS_EXIT - Device is exiting from LPDS.
//! -\b PRCM_CORE_RESET - Device is exiting soft core only reset
//! -\b PRCM_MCU_RESET - Device is exiting soft subsystem reset.
//! -\b PRCM_WDT_RESET - Device was reset by watchdog.
//! -\b PRCM_SOC_RESET - Device is exting SOC reset.
//! -\b PRCM_HIB_EXIT - Device is exiting hibernate.
//!
//! \return Returns one of the cause defined above.
//
//*****************************************************************************
unsigned long PRCMSysResetCauseGet()
{
unsigned long ulWakeupStatus;
//
// Read the Reset status
//
ulWakeupStatus = (HWREG(GPRCM_BASE+ GPRCM_O_APPS_RESET_CAUSE) & 0xFF);
//
// For hibernate do additional chaeck.
//
if(ulWakeupStatus == PRCM_POWER_ON)
{
if(PRCMHIBRegRead(HIB3P3_BASE + HIB3P3_O_MEM_HIB_WAKE_STATUS) & 0x1)
{
ulWakeupStatus = PRCM_HIB_EXIT;
}
}
//
// Return status.
//
return ulWakeupStatus;
}
//*****************************************************************************
//
//! Enable clock(s) to peripheral.
//!
//! \param ulPeripheral is one of the valid peripherals
//! \param ulClkFlags are bitmask of clock(s) to be enabled.
//!
//! This function enables the clock for the specified peripheral. Peripherals
//! are by default clock gated (disabled) and generates a bus fault if
//! accessed.
//!
//! The parameter \e ulClkFlags can be logical OR of the following:
//! -\b PRCM_RUN_MODE_CLK - Ungates clock to the peripheral
//! -\b PRCM_SLP_MODE_CLK - Keeps the clocks ungated in sleep.
//!
//! \return None.
//
//*****************************************************************************
void
PRCMPeripheralClkEnable(unsigned long ulPeripheral, unsigned long ulClkFlags)
{
//
// Enable the specified peripheral clocks, Nothing to be done for PRCM_ADC
// as it is a dummy define for pinmux utility code generation
//
if(ulPeripheral != PRCM_ADC)
{
HWREG(ARCM_BASE + PRCM_PeriphRegsList[ulPeripheral].ulClkReg) |= ulClkFlags;
}
//
// Set the default clock for camera
//
if(ulPeripheral == PRCM_CAMERA)
{
HWREG(ARCM_BASE + APPS_RCM_O_CAMERA_CLK_GEN) = 0x0404;
}
}
//*****************************************************************************
//
//! Disables clock(s) to peripheral.
//!
//! \param ulPeripheral is one of the valid peripherals
//! \param ulClkFlags are bitmask of clock(s) to be enabled.
//!
//! This function disable the clock for the specified peripheral. Peripherals
//! are by default clock gated (disabled) and generated a bus fault if
//! accessed.
//!
//! The parameter \e ulClkFlags can be logical OR bit fields as defined in
//! PRCMEnablePeripheral().
//!
//! \return None.
//
//*****************************************************************************
void
PRCMPeripheralClkDisable(unsigned long ulPeripheral, unsigned long ulClkFlags)
{
//
// Disable the specified peripheral clocks
//
HWREG(ARCM_BASE + PRCM_PeriphRegsList[ulPeripheral].ulClkReg) &= ~ulClkFlags;
}
//*****************************************************************************
//
//! Gets the input clock for the specified peripheral.
//!
//! \param ulPeripheral is one of the valid peripherals.
//!
//! This function gets the input clock for the specified peripheral.
//!
//! The parameter \e ulPeripheral has the same definition as that in
//! PRCMPeripheralClkEnable();
//!
//! \return Returns input clock frequency for specified peripheral.
//
//*****************************************************************************
unsigned long
PRCMPeripheralClockGet(unsigned long ulPeripheral)
{
unsigned long ulClockFreq;
unsigned long ulHiPulseDiv;
unsigned long ulLoPulseDiv;
//
// Get the clock based on specified peripheral.
//
if(((ulPeripheral == PRCM_SSPI) | (ulPeripheral == PRCM_LSPI)
| (ulPeripheral == PRCM_GSPI)))
{
return XTAL_CLK;
}
else if(ulPeripheral == PRCM_CAMERA)
{
ulHiPulseDiv = ((HWREG(ARCM_BASE + APPS_RCM_O_CAMERA_CLK_GEN) >> 8) & 0x07);
ulLoPulseDiv = (HWREG(ARCM_BASE + APPS_RCM_O_CAMERA_CLK_GEN)& 0xFF);
}
else if(ulPeripheral == PRCM_SDHOST)
{
ulHiPulseDiv = ((HWREG(ARCM_BASE + APPS_RCM_O_MMCHS_CLK_GEN) >> 8) & 0x07);
ulLoPulseDiv = (HWREG(ARCM_BASE + APPS_RCM_O_MMCHS_CLK_GEN)& 0xFF);
}
else
{
return SYS_CLK;
}
//
// Compute the clock freq. from the divider value
//
ulClockFreq = (240000000/((ulHiPulseDiv + 1) + (ulLoPulseDiv + 1)));
//
// Return the clock rate.
//
return ulClockFreq;
}
//*****************************************************************************
//
//! Performs a software reset of a peripheral.
//!
//! \param ulPeripheral is one of the valid peripheral.
//!
//! This assert or deassert reset to the specified peripheral based of the
//! \e bAssert parameter.
//!
//! \return None.
//
//*****************************************************************************
void
PRCMPeripheralReset(unsigned long ulPeripheral)
{
volatile unsigned long ulDelay;
if( ulPeripheral != PRCM_DTHE)
{
//
// Assert the reset
//
HWREG(ARCM_BASE + PRCM_PeriphRegsList[ulPeripheral].ulRstReg)
|= PRCM_SOFT_RESET;
//
// Delay for a little bit.
//
for(ulDelay = 0; ulDelay < 16; ulDelay++)
{
}
//
// Deassert the reset
//
HWREG(ARCM_BASE+PRCM_PeriphRegsList[ulPeripheral].ulRstReg)
&= ~PRCM_SOFT_RESET;
}
}
//*****************************************************************************
//
//! Determines if a peripheral is ready.
//!
//! \param ulPeripheral is one of the valid modules
//!
//! This function determines if a particular peripheral is ready to be
//! accessed. The peripheral may be in a non-ready state if it is not enabled,
//! is being held in reset, or is in the process of becoming ready after being
//! enabled or taken out of reset.
//!
//! \return Returns \b true if the peripheral is ready, \b false otherwise.
//
//*****************************************************************************
tBoolean
PRCMPeripheralStatusGet(unsigned long ulPeripheral)
{
unsigned long ReadyBit;
//
// Read the ready bit status
//
ReadyBit = HWREG(ARCM_BASE + PRCM_PeriphRegsList[ulPeripheral].ulRstReg);
ReadyBit = ReadyBit & PRCM_ENABLE_STATUS;
if (ReadyBit)
{
//
// Module is ready
//
return(true);
}
else
{
//
// Module is not ready
//
return(false);
}
}
//*****************************************************************************
//
//! Configure I2S fracactional divider
//!
//! \param ulI2CClkFreq is the required input clock for McAPS module
//!
//! This function configures I2S fractional divider. By default this
//! divider is set to output 24 Mhz clock to I2S module.
//!
//! The minimum frequency that can be obtained by configuring this divider is
//!
//! (240000KHz/1023.99) = 234.377 KHz
//!
//! \return None.
//
//*****************************************************************************
void
PRCMI2SClockFreqSet(unsigned long ulI2CClkFreq)
{
unsigned long long ullDiv;
unsigned short usInteger;
unsigned short usFrac;
ullDiv = (((unsigned long long)240000000 * 65536)/ulI2CClkFreq);
usInteger = (ullDiv/65536);
usFrac = (ullDiv%65536);
HWREG(ARCM_BASE + APPS_RCM_O_MCASP_FRAC_CLK_CONFIG0) =
((usInteger & 0x3FF) << 16 | usFrac);
}
//*****************************************************************************
//
//! Sets the LPDS exit PC and SP restore vlaues.
//!
//! \param ulStackPtr is the SP restore value.
//! \param ulProgCntr is the PC restore value
//!
//! This function sets the LPDS exit PC and SP restore vlaues. Setting
//! \e ulProgCntr to a non-zero value, forces bootloader to jump to that
//! address with Stack Pointer initialized to \e ulStackPtr on LPDS exit,
//! otherwise the application's vector table entries are used.
//!
//! \return None.
//
//*****************************************************************************
void
PRCMLPDSRestoreInfoSet(unsigned long ulStackPtr, unsigned long ulProgCntr)
{
//
// Set The SP Value
//
HWREG(0x4402E18C) = ulStackPtr;
//
// Set The PC Value
//
HWREG(0x4402E190) = ulProgCntr;
}
//*****************************************************************************
//
//! Puts the system into Low Power Deel Sleep (LPDS) power mode.
//!
//! This function puts the system into Low Power Deel Sleep (LPDS) power mode.
//! A call to this function never returns and the execution starts from Reset.
//! \sa PRCMLPDSRestoreInfoSet().
//!
//! \return None.
//!
//! \note External debugger will always disconnect whenever the system
//! enters LPDS and debug interface is shutdown until next POR reset. In order
//! to avoid this and allow for connecting back the debugger after waking up
//! from LPDS \sa PRCMLPDSEnterKeepDebugIf().
//!
//
//*****************************************************************************
void
PRCMLPDSEnter()
{
unsigned long ulChipId;
//
// Read the Chip ID
//
ulChipId = ((HWREG(GPRCM_BASE + GPRCM_O_GPRCM_EFUSE_READ_REG2) >> 16) & 0x1F);
//
// Check if flash exists
//
if( (0x11 == ulChipId) || (0x19 == ulChipId))
{
//
// Disable the flash
//
FlashDisable();
}
#ifndef KEEP_TESTPD_ALIVE
//
// Disable TestPD
//
HWREG(0x4402E168) |= (1<<9);
#endif
//
// Set bandgap duty cycle to 1
//
HWREG(HIB1P2_BASE + HIB1P2_O_BGAP_DUTY_CYCLING_EXIT_CFG) = 0x1;
//
// Request LPDS
//
HWREG(ARCM_BASE + APPS_RCM_O_APPS_LPDS_REQ)
= APPS_RCM_APPS_LPDS_REQ_APPS_LPDS_REQ;
//
// Wait for system to enter LPDS
//
__asm(" wfi\n");
//
// Infinite loop
//
while(1)
{
}
}
//*****************************************************************************
//
//! Puts the system into Low Power Deel Sleep (LPDS) power mode keeping
//! debug interface alive.
//!
//! This function puts the system into Low Power Deel Sleep (LPDS) power mode
//! keeping debug interface alive. A call to this function never returns and the
//! execution starts from Reset \sa PRCMLPDSRestoreInfoSet().
//!
//! \return None.
//!
//! \note External debugger will always disconnect whenever the system
//! enters LPDS, using this API will allow connecting back the debugger after
//! waking up from LPDS. This API is recommended for development purposes
//! only as it adds to the current consumption of the system.
//!
//
//*****************************************************************************
void
PRCMLPDSEnterKeepDebugIf()
{
unsigned long ulChipId;
//
// Read the Chip ID
//
ulChipId = ((HWREG(GPRCM_BASE + GPRCM_O_GPRCM_EFUSE_READ_REG2) >> 16) & 0x1F);
//
// Check if flash exists
//
if( (0x11 == ulChipId) || (0x19 == ulChipId))
{
//
// Disable the flash
//
FlashDisable();
}
//
// Set bandgap duty cycle to 1
//
HWREG(HIB1P2_BASE + HIB1P2_O_BGAP_DUTY_CYCLING_EXIT_CFG) = 0x1;
//
// Request LPDS
//
HWREG(ARCM_BASE + APPS_RCM_O_APPS_LPDS_REQ)
= APPS_RCM_APPS_LPDS_REQ_APPS_LPDS_REQ;
//
// Wait for system to enter LPDS
//
__asm(" wfi\n");
//
// Infinite loop
//
while(1)
{
}
}
//*****************************************************************************
//
//! Enable the individual LPDS wakeup source(s).
//!
//! \param ulLpdsWakeupSrc is logical OR of wakeup sources.
//!
//! This function enable the individual LPDS wakeup source(s) and following
//! three wakeup sources (\e ulLpdsWakeupSrc ) are supported by the device.
//! -\b PRCM_LPDS_HOST_IRQ
//! -\b PRCM_LPDS_GPIO
//! -\b PRCM_LPDS_TIMER
//!
//! \return None.
//
//*****************************************************************************
void
PRCMLPDSWakeupSourceEnable(unsigned long ulLpdsWakeupSrc)
{
unsigned long ulRegVal;
//
// Read the current wakup sources
//
ulRegVal = HWREG(GPRCM_BASE+ GPRCM_O_APPS_LPDS_WAKEUP_CFG);
//
// Enable individual wakeup source
//
ulRegVal = ((ulRegVal | ulLpdsWakeupSrc) & 0x91);
//
// Set the configuration in the register
//
HWREG(GPRCM_BASE+ GPRCM_O_APPS_LPDS_WAKEUP_CFG) = ulRegVal;
}
//*****************************************************************************
//
//! Disable the individual LPDS wakeup source(s).
//!
//! \param ulLpdsWakeupSrc is logical OR of wakeup sources.
//!
//! This function enable the individual LPDS wakeup source(s) and following
//! three wake up sources (\e ulLpdsWakeupSrc ) are supported by the device.
//! -\b PRCM_LPDS_HOST_IRQ
//! -\b PRCM_LPDS_GPIO
//! -\b PRCM_LPDS_TIMER
//!
//! \return None.
//
//*****************************************************************************
void
PRCMLPDSWakeupSourceDisable(unsigned long ulLpdsWakeupSrc)
{
HWREG(GPRCM_BASE+ GPRCM_O_APPS_LPDS_WAKEUP_CFG) &= ~ulLpdsWakeupSrc;
}
//*****************************************************************************
//
//! Get LPDS wakeup cause
//!
//! This function gets LPDS wakeup caouse
//!
//! \return Returns values enumerated as described in
//! PRCMLPDSWakeupSourceEnable().
//
//*****************************************************************************
unsigned long
PRCMLPDSWakeupCauseGet()
{
return (HWREG(GPRCM_BASE+ GPRCM_O_APPS_LPDS_WAKEUP_SRC));
}
//*****************************************************************************
//
//! Sets LPDS wakeup Timer
//!
//! \param ulTicks is number of 32.768 KHz clocks
//!
//! This function sets internal LPDS wakeup timer running at 32.768 KHz. The
//! timer is only configured if the parameter \e ulTicks is in valid range i.e.
//! from 21 to 2^32.
//!
//! \return Returns \b true on success, \b false otherwise.
//
//*****************************************************************************
void
PRCMLPDSIntervalSet(unsigned long ulTicks)
{
//
// Check sleep is atleast for 21 cycles
// If not set the sleep time to 21 cycles
//
if( ulTicks < 21)
{
ulTicks = 21;
}
HWREG(GPRCM_BASE + GPRCM_O_APPS_LPDS_WAKETIME_WAKE_CFG) = ulTicks;
HWREG(GPRCM_BASE + GPRCM_O_APPS_LPDS_WAKETIME_OPP_CFG) = ulTicks-20;
}
//*****************************************************************************
//
//! Selects the GPIO for LPDS wakeup
//!
//! \param ulGPIOPin is one of the valid GPIO fro LPDS wakeup.
//! \param ulType is the wakeup trigger type.
//!
//! This function setects the wakeup GPIO for LPDS wakeup and can be
//! used to select one out of 7 pre-defined GPIO(s).
//!
//! The parameter \e ulLpdsGPIOSel should be one of the following:-
//! -\b PRCM_LPDS_GPIO2
//! -\b PRCM_LPDS_GPIO4
//! -\b PRCM_LPDS_GPIO13
//! -\b PRCM_LPDS_GPIO17
//! -\b PRCM_LPDS_GPIO11
//! -\b PRCM_LPDS_GPIO24
//! -\b PRCM_LPDS_GPIO26
//!
//! The parameter \e ulType sets the trigger type and can be one of the
//! following:
//! - \b PRCM_LPDS_LOW_LEVEL
//! - \b PRCM_LPDS_HIGH_LEVEL
//! - \b PRCM_LPDS_FALL_EDGE
//! - \b PRCM_LPDS_RISE_EDGE
//!
//! \return None.
//
//*****************************************************************************
void
PRCMLPDSWakeUpGPIOSelect(unsigned long ulGPIOPin, unsigned long ulType)
{
//
// Set the wakeup GPIO
//
PRCMHIBRegWrite(HIB3P3_BASE + HIB3P3_O_MEM_HIB_LPDS_GPIO_SEL, ulGPIOPin);
//
// Set the trigger type.
//
HWREG(GPRCM_BASE + GPRCM_O_APPS_GPIO_WAKE_CONF) = (ulType & 0x3);
}
//*****************************************************************************
//
//! Puts the system into Sleep.
//!
//! This function puts the system into sleep power mode. System exits the power
//! state on any one of the available interrupt. On exit from sleep mode the
//! function returns to the calling function with all the processor core
//! registers retained.
//!
//! \return None.
//
//*****************************************************************************
void
PRCMSleepEnter()
{
//
// Request Sleep
//
CPUwfi();
}
//*****************************************************************************
//
//! Enable SRAM column retention during LPDS Power mode(s)
//!
//! \param ulSramColSel is bit mask of valid SRAM columns.
//! \param ulModeFlags is the bit mask of power modes.
//!
//! This functions enables the SRAM retention. The device supports configurable
//! SRAM column retention in Low Power Deep Sleep (LPDS). Each column is of
//! 64 KB size.
//!
//! The parameter \e ulSramColSel should be logical OR of the following:-
//! -\b PRCM_SRAM_COL_1
//! -\b PRCM_SRAM_COL_2
//! -\b PRCM_SRAM_COL_3
//! -\b PRCM_SRAM_COL_4
//!
//! The parameter \e ulModeFlags selects the power modes and sholud be logical
//! OR of one or more of the following
//! -\b PRCM_SRAM_LPDS_RET
//!
//! \return None.
//
//****************************************************************************
void
PRCMSRAMRetentionEnable(unsigned long ulSramColSel, unsigned long ulModeFlags)
{
if(ulModeFlags & PRCM_SRAM_LPDS_RET)
{
//
// Configure LPDS SRAM retention register
//
HWREG(GPRCM_BASE+ GPRCM_O_APPS_SRAM_LPDS_CFG) = (ulSramColSel & 0xF);
}
}
//*****************************************************************************
//
//! Disable SRAM column retention during LPDS Power mode(s).
//!
//! \param ulSramColSel is bit mask of valid SRAM columns.
//! \param ulFlags is the bit mask of power modes.
//!
//! This functions disable the SRAM retention. The device supports configurable
//! SRAM column retention in Low Power Deep Sleep (LPDS). Each column is
//! of 64 KB size.
//!
//! The parameter \e ulSramColSel should be logical OR of the following:-
//! -\b PRCM_SRAM_COL_1
//! -\b PRCM_SRAM_COL_2
//! -\b PRCM_SRAM_COL_3
//! -\b PRCM_SRAM_COL_4
//!
//! The parameter \e ulFlags selects the power modes and sholud be logical OR
//! of one or more of the following
//! -\b PRCM_SRAM_LPDS_RET
//!
//! \return None.
//
//****************************************************************************
void
PRCMSRAMRetentionDisable(unsigned long ulSramColSel, unsigned long ulFlags)
{
if(ulFlags & PRCM_SRAM_LPDS_RET)
{
//
// Configure LPDS SRAM retention register
//
HWREG(GPRCM_BASE+ GPRCM_O_APPS_SRAM_LPDS_CFG) &= ~(ulSramColSel & 0xF);
}
}
//*****************************************************************************
//
//! Enables individual HIB wakeup source(s).
//!
//! \param ulHIBWakupSrc is logical OR of valid HIB wakeup sources.
//!
//! This function enables individual HIB wakeup source(s). The paramter
//! \e ulHIBWakupSrc is the bit mask of HIB wakeup sources and should be
//! logical OR of one or more of the follwoing :-
//! -\b PRCM_HIB_SLOW_CLK_CTR
//! -\b PRCM_HIB_GPIO2
//! -\b PRCM_HIB_GPIO4
//! -\b PRCM_HIB_GPIO13
//! -\b PRCM_HIB_GPIO17
//! -\b PRCM_HIB_GPIO11
//! -\b PRCM_HIB_GPIO24
//! -\b PRCM_HIB_GPIO26
//!
//! \return None.
//
//*****************************************************************************
void
PRCMHibernateWakeupSourceEnable(unsigned long ulHIBWakupSrc)
{
unsigned long ulRegValue;
//
// Read the RTC register
//
ulRegValue = PRCMHIBRegRead(HIB3P3_BASE+HIB3P3_O_MEM_HIB_RTC_WAKE_EN);
//
// Enable the RTC as wakeup source if specified
//
ulRegValue |= (ulHIBWakupSrc & 0x1);
//
// Enable HIB wakeup sources
//
PRCMHIBRegWrite(HIB3P3_BASE+HIB3P3_O_MEM_HIB_RTC_WAKE_EN,ulRegValue);
//
// REad the GPIO wakeup configuration register
//
ulRegValue = PRCMHIBRegRead(HIB3P3_BASE+HIB3P3_O_MEM_GPIO_WAKE_EN);
//
// Enable the specified GPIOs a wakeup sources
//
ulRegValue |= ((ulHIBWakupSrc>>16)&0xFF);
//
// Write the new register configuration
//
PRCMHIBRegWrite(HIB3P3_BASE+HIB3P3_O_MEM_GPIO_WAKE_EN,ulRegValue);
}
//*****************************************************************************
//
//! Disable individual HIB wakeup source(s).
//!
//! \param ulHIBWakupSrc is logical OR of valid HIB wakeup sources.
//!
//! This function disable individual HIB wakeup source(s). The paramter
//! \e ulHIBWakupSrc is same as bit fileds defined in
//! PRCMEnableHibernateWakeupSource()
//!
//! \return None.
//
//*****************************************************************************
void
PRCMHibernateWakeupSourceDisable(unsigned long ulHIBWakupSrc)
{
unsigned long ulRegValue;
//
// Read the RTC register
//
ulRegValue = PRCMHIBRegRead(HIB3P3_BASE+HIB3P3_O_MEM_HIB_RTC_WAKE_EN);
//
// Disable the RTC as wakeup source if specified
//
ulRegValue &= ~(ulHIBWakupSrc & 0x1);
//
// Disable HIB wakeup sources
//
PRCMHIBRegWrite(HIB3P3_BASE+HIB3P3_O_MEM_HIB_RTC_WAKE_EN,ulRegValue);
//
// Read the GPIO wakeup configuration register
//
ulRegValue = PRCMHIBRegRead(HIB3P3_BASE+HIB3P3_O_MEM_GPIO_WAKE_EN);
//
// Enable the specified GPIOs a wakeup sources
//
ulRegValue &= ~((ulHIBWakupSrc>>16)&0xFF);
//
// Write the new register configuration
//
PRCMHIBRegWrite(HIB3P3_BASE+HIB3P3_O_MEM_GPIO_WAKE_EN,ulRegValue);
}
//*****************************************************************************
//
//! Get hibernate wakeup cause
//!
//! This function gets the hibernate wakeup cause.
//!
//! \return Returns \b PRCM_HIB_WAKEUP_CAUSE_SLOW_CLOCK or
//! \b PRCM_HIB_WAKEUP_CAUSE_GPIO
//
//*****************************************************************************
unsigned long
PRCMHibernateWakeupCauseGet()
{
return ((PRCMHIBRegRead(HIB3P3_BASE + HIB3P3_O_MEM_HIB_WAKE_STATUS)>>1)&0xF);
}
//*****************************************************************************
//
//! Sets Hibernate wakeup Timer
//!
//! \param ullTicks is number of 32.768 KHz clocks
//!
//! This function sets internal hibernate wakeup timer running at 32.768 KHz.
//!
//! \return Returns \b true on success, \b false otherwise.
//
//*****************************************************************************
void
PRCMHibernateIntervalSet(unsigned long long ullTicks)
{
unsigned long long ullRTCVal;
//
// Latch the RTC vlaue
//
PRCMHIBRegWrite(HIB3P3_BASE+HIB3P3_O_MEM_HIB_RTC_TIMER_READ ,0x1);
//
// Read latched values as 2 32-bit vlaues
//
ullRTCVal = PRCMHIBRegRead(HIB3P3_BASE + HIB3P3_O_MEM_HIB_RTC_TIMER_MSW);
ullRTCVal = ullRTCVal << 32;
ullRTCVal |= PRCMHIBRegRead(HIB3P3_BASE+HIB3P3_O_MEM_HIB_RTC_TIMER_LSW);
//
// Add the interval
//
ullRTCVal = ullRTCVal + ullTicks;
//
// Set RTC match value
//
PRCMHIBRegWrite(HIB3P3_BASE+HIB3P3_O_MEM_HIB_RTC_WAKE_LSW_CONF,
(unsigned long)(ullRTCVal));
PRCMHIBRegWrite(HIB3P3_BASE+HIB3P3_O_MEM_HIB_RTC_WAKE_MSW_CONF,
(unsigned long)(ullRTCVal>>32));
}
//*****************************************************************************
//
//! Selects the GPIO(s) for hibernate wakeup
//!
//! \param ulGPIOBitMap is the bit-map of valid hibernate wakeup GPIO.
//! \param ulType is the wakeup trigger type.
//!
//! This function setects the wakeup GPIO for hibernate and can be
//! used to select any combination of 7 pre-defined GPIO(s).
//!
//! This function enables individual HIB wakeup source(s). The paramter
//! \e ulGPIOBitMap should be one of the follwoing :-
//! -\b PRCM_HIB_GPIO2
//! -\b PRCM_HIB_GPIO4
//! -\b PRCM_HIB_GPIO13
//! -\b PRCM_HIB_GPIO17
//! -\b PRCM_HIB_GPIO11
//! -\b PRCM_HIB_GPIO24
//! -\b PRCM_HIB_GPIO26
//!
//! The parameter \e ulType sets the trigger type and can be one of the
//! following:
//! - \b PRCM_HIB_LOW_LEVEL
//! - \b PRCM_HIB_HIGH_LEVEL
//! - \b PRCM_HIB_FALL_EDGE
//! - \b PRCM_HIB_RISE_EDGE
//!
//! \return None.
//
//*****************************************************************************
void
PRCMHibernateWakeUpGPIOSelect(unsigned long ulGPIOBitMap, unsigned long ulType)
{
unsigned char ucLoop;
unsigned long ulRegValue;
//
// Shift the bits to extract the GPIO selection
//
ulGPIOBitMap >>= 16;
//
// Set the configuration for each GPIO
//
for(ucLoop=0; ucLoop < 7; ucLoop++)
{
if(ulGPIOBitMap & (1<<ucLoop))
{
ulRegValue = PRCMHIBRegRead(HIB3P3_BASE+HIB3P3_O_MEM_GPIO_WAKE_CONF);
ulRegValue = (ulRegValue & (~(0x3 << (ucLoop*2)))) | (ulType <<(ucLoop*2));
PRCMHIBRegWrite(HIB3P3_BASE+HIB3P3_O_MEM_GPIO_WAKE_CONF, ulRegValue);
}
}
}
//*****************************************************************************
//
//! Puts the system into Hibernate
//!
//! This function puts the system into Hibernate. The device enters HIB
//! immediately and on exit from HIB device core starts its execution from
//! reset thus the function never returns.
//!
//! \return None.
//
//*****************************************************************************
void
PRCMHibernateEnter()
{
//
// Request hibernate.
//
PRCMHIBRegWrite((HIB3P3_BASE+HIB3P3_O_MEM_HIB_REQ),0x1);
//
// Wait for system to enter hibernate
//
__asm(" wfi\n");
//
// Infinite loop
//
while(1)
{
}
}
//*****************************************************************************
//
//! Gets the current value of the internal slow clock counter
//!
//! This function latches and reads the internal RTC running at 32.768 Khz
//!
//! \return 64-bit current counter vlaue.
//
//*****************************************************************************
unsigned long long
PRCMSlowClkCtrGet()
{
unsigned long long ullRTCVal;
//
// Latch the RTC vlaue
//
PRCMHIBRegWrite(HIB3P3_BASE+HIB3P3_O_MEM_HIB_RTC_TIMER_READ, 0x1);
//
// Read latched values as 2 32-bit vlaues
//
ullRTCVal = PRCMHIBRegRead(HIB3P3_BASE + HIB3P3_O_MEM_HIB_RTC_TIMER_MSW);
ullRTCVal = ullRTCVal << 32;
ullRTCVal |= PRCMHIBRegRead(HIB3P3_BASE+HIB3P3_O_MEM_HIB_RTC_TIMER_LSW);
return ullRTCVal;
}
//*****************************************************************************
//
//! Gets the current value of the internal slow clock counter
//!
//! This function is similar to \sa PRCMSlowClkCtrGet() but reads the counter
//! value from a relatively faster interface using an auto-latch mechainsm.
//!
//! \note Due to the nature of implemetation of auto latching, when using this
//! API, the recommendation is to read the value thrice and identify the right
//! value (as 2 out the 3 read values will always be correct and with a max. of
//! 1 LSB change)
//!
//! \return 64-bit current counter vlaue.
//
//*****************************************************************************
unsigned long long PRCMSlowClkCtrFastGet(void)
{
unsigned long long ullRTCVal;
//
// Read as 2 32-bit values
//
ullRTCVal = HWREG(HIB1P2_BASE + HIB1P2_O_HIB_RTC_TIMER_MSW_1P2);
ullRTCVal = ullRTCVal << 32;
ullRTCVal |= HWREG(HIB1P2_BASE + HIB1P2_O_HIB_RTC_TIMER_LSW_1P2);
return ullRTCVal;
}
//*****************************************************************************
//
//! Sets slow clock counter match value to interrupt the processor.
//!
//! \param ullValue is the match value.
//!
//! This function sets the match value for slow clock counter. This is use
//! to interrupt the processor when RTC counts to the specified value.
//!
//! \return None.
//
//*****************************************************************************
void PRCMSlowClkCtrMatchSet(unsigned long long ullValue)
{
//
// Set RTC match value
//
PRCMHIBRegWrite(HIB3P3_BASE + HIB3P3_O_MEM_HIB_RTC_IRQ_LSW_CONF,
(unsigned long)(ullValue));
PRCMHIBRegWrite(HIB3P3_BASE + HIB3P3_O_MEM_HIB_RTC_IRQ_MSW_CONF,
(unsigned long)(ullValue>>32));
}
//*****************************************************************************
//
//! Gets slow clock counter match value.
//!
//! This function gets the match value for slow clock counter. This is use
//! to interrupt the processor when RTC counts to the specified value.
//!
//! \return None.
//
//*****************************************************************************
unsigned long long PRCMSlowClkCtrMatchGet()
{
unsigned long long ullValue;
//
// Get RTC match value
//
ullValue = PRCMHIBRegRead(HIB3P3_BASE + HIB3P3_O_MEM_HIB_RTC_IRQ_MSW_CONF);
ullValue = ullValue<<32;
ullValue |= PRCMHIBRegRead(HIB3P3_BASE + HIB3P3_O_MEM_HIB_RTC_IRQ_LSW_CONF);
//
// Return the value
//
return ullValue;
}
//*****************************************************************************
//
//! Write to On-Chip Retention (OCR) register.
//!
//! This function writes to On-Chip retention register. The device supports two
//! 4-byte OCR register which are retained across all power mode.
//!
//! The parameter \e ucIndex is an index of the OCR and can be \b 0 or \b 1.
//!
//! \return None.
//
//*****************************************************************************
void PRCMOCRRegisterWrite(unsigned char ucIndex, unsigned long ulRegValue)
{
PRCMHIBRegWrite(HIB3P3_BASE+HIB3P3_O_MEM_HIB_REG2+(ucIndex << 2),ulRegValue);
}
//*****************************************************************************
//
//! Read from On-Chip Retention (OCR) register.
//!
//! This function reads from On-Chip retention register. The device supports two
//! 4-byte OCR register which are retained across all power mode.
//!
//! The parameter \e ucIndex is an index of the OCR and can be \b 0 or \b 1.
//!
//! \return None.
//
//*****************************************************************************
unsigned long PRCMOCRRegisterRead(unsigned char ucIndex)
{
//
// Return the read value.
//
return PRCMHIBRegRead(HIB3P3_BASE+HIB3P3_O_MEM_HIB_REG2 + (ucIndex << 2));
}
//*****************************************************************************
//
//! Registers an interrupt handler for the PRCM.
//!
//! \param pfnHandler is a pointer to the function to be called when the
//! interrupt is activated.
//!
//! This function does the actual registering of the interrupt handler. This
//! function enables the global interrupt in the interrupt controller;
//!
//! \return None.
//
//*****************************************************************************
void PRCMIntRegister(void (*pfnHandler)(void))
{
//
// Register the interrupt handler.
//
IntRegister(INT_PRCM, pfnHandler);
//
// Enable the PRCM interrupt.
//
IntEnable(INT_PRCM);
}
//*****************************************************************************
//
//! Unregisters an interrupt handler for the PRCM.
//!
//! This function does the actual unregistering of the interrupt handler. It
//! clears the handler to be called when a PRCM interrupt occurs. This
//! function also masks off the interrupt in the interrupt controller so that
//! the interrupt handler no longer is called.
//!
//! \return None.
//
//*****************************************************************************
void PRCMIntUnregister()
{
//
// Enable the UART interrupt.
//
IntDisable(INT_PRCM);
//
// Register the interrupt handler.
//
IntUnregister(INT_PRCM);
}
//*****************************************************************************
//
//! Enables individual PRCM interrupt sources.
//!
//! \param ulIntFlags is the bit mask of the interrupt sources to be enabled.
//!
//! This function enables the indicated ARCM interrupt sources. Only the
//! sources that are enabled can be reflected to the processor interrupt;
//! disabled sources have no effect on the processor.
//!
//! The \e ulIntFlags parameter is the logical OR of any of the following:
//! -\b PRCM_INT_SLOW_CLK_CTR
//!
//
//*****************************************************************************
void PRCMIntEnable(unsigned long ulIntFlags)
{
unsigned long ulRegValue;
if(ulIntFlags & PRCM_INT_SLOW_CLK_CTR )
{
//
// Enable PRCM interrupt
//
HWREG(ARCM_BASE + APPS_RCM_O_APPS_RCM_INTERRUPT_ENABLE) |= 0x4;
//
// Enable RTC interrupt
//
ulRegValue = PRCMHIBRegRead(HIB3P3_BASE + HIB3P3_O_MEM_HIB_RTC_IRQ_ENABLE);
ulRegValue |= 0x1;
PRCMHIBRegWrite(HIB3P3_BASE + HIB3P3_O_MEM_HIB_RTC_IRQ_ENABLE, ulRegValue);
}
}
//*****************************************************************************
//
//! Disables individual PRCM interrupt sources.
//!
//! \param ulIntFlags is the bit mask of the interrupt sources to be disabled.
//!
//! This function disables the indicated ARCM interrupt sources. Only the
//! sources that are enabled can be reflected to the processor interrupt;
//! disabled sources have no effect on the processor.
//!
//! The \e ulIntFlags parameter has the same definition as the \e ulIntFlags
//! parameter to PRCMEnableInterrupt().
//!
//! \return None.
//
//*****************************************************************************
void PRCMIntDisable(unsigned long ulIntFlags)
{
unsigned long ulRegValue;
if(ulIntFlags & PRCM_INT_SLOW_CLK_CTR )
{
//
// Disable PRCM interrupt
//
HWREG(ARCM_BASE + APPS_RCM_O_APPS_RCM_INTERRUPT_ENABLE) &= ~0x4;
//
// Disable RTC interrupt
//
ulRegValue = PRCMHIBRegRead(HIB3P3_BASE + HIB3P3_O_MEM_HIB_RTC_IRQ_ENABLE);
ulRegValue &= ~0x1;
PRCMHIBRegWrite(HIB3P3_BASE + HIB3P3_O_MEM_HIB_RTC_IRQ_ENABLE, ulRegValue);
}
}
//*****************************************************************************
//
//! Gets the current interrupt status.
//!
//! This function returns the PRCM interrupt status of interrupts that are
//! allowed to reflect to the processor. The interrupts are cleared on read.
//!
//! \return Returns the current interrupt status.
//
//*****************************************************************************
unsigned long PRCMIntStatus()
{
return HWREG(ARCM_BASE + APPS_RCM_O_APPS_RCM_INTERRUPT_STATUS);
}
//*****************************************************************************
//
//! Mark the function of RTC as being used
//!
//! This function marks in HW that feature to maintain calendar time in device
//! is being used.
//!
//! Specifically, this feature reserves user's HIB Register-1 accessed through
//! PRCMOCRRegisterWrite(1) for internal work / purpose, therefore, the stated
//! register is not available to user. Also, users must not excercise the Slow
//! Clock Counter API(s), if RTC has been set for use.
//!
//! The RTC feature, if set or marked, can be only reset either through reboot
//! or power cycle.
//!
//! \return None.
//
//*****************************************************************************
void PRCMRTCInUseSet()
{
RTC_USE_SET();
return;
}
//*****************************************************************************
//
//! Ascertain whether function of RTC is being used
//!
//! This function indicates whether function of RTC is being used on the device
//! or not.
//!
//! This routine should be utilized by the application software, when returning
//! from low-power, to confirm that RTC has been put to use and may not need to
//! set the value of the RTC.
//!
//! The RTC feature, if set or marked, can be only reset either through reboot
//! or power cycle.
//!
//! \return None.
//
//*****************************************************************************
tBoolean PRCMRTCInUseGet()
{
return IS_RTC_USED()? true : false;
}
//*****************************************************************************
//
//! Set the calendar time in the device.
//!
//! \param ulSecs refers to the seconds part of the calendar time
//! \param usMsec refers to the fractional (ms) part of the second
//!
//! This function sets the specified calendar time in the device. The calendar
//! time is outlined in terms of seconds and milliseconds. However, the device
//! makes no assumption about the origin or reference of the calendar time.
//!
//! The device uses the indicated calendar value to update and maintain the
//! wall-clock time across active and low power states.
//!
//! The function PRCMRTCInUseSet() must be invoked prior to use of this feature.
//!
//! \return None.
//
//*****************************************************************************
void PRCMRTCSet(unsigned long ulSecs, unsigned short usMsec)
{
unsigned long long ullMsec = 0;
if(IS_RTC_USED()) {
ullMsec = RTC_U64MSEC_MK(ulSecs, usMsec) - SCC_U64MSEC_GET();
RTC_U32SECS_REG_WR(RTC_SECS_IN_U64MSEC(ullMsec));
RTC_U16MSEC_REG_WR(RTC_MSEC_IN_U64MSEC(ullMsec));
}
return;
}
//*****************************************************************************
//
//! Get the instantaneous calendar time from the device.
//!
//! \param ulSecs refers to the seconds part of the calendar time
//! \param usMsec refers to the fractional (ms) part of the second
//!
//! This function fetches the instantaneous value of the ticking calendar time
//! from the device. The calendar time is outlined in terms of seconds and
//! milliseconds.
//!
//! The device provides the calendar value that has been maintained across
//! active and low power states.
//!
//! The function PRCMRTCSet() must have been invoked once to set a reference.
//!
//! \return None.
//
//*****************************************************************************
void PRCMRTCGet(unsigned long *ulSecs, unsigned short *usMsec)
{
unsigned long long ullMsec = 0;
if(IS_RTC_USED()) {
ullMsec = RTC_U64MSEC_MK(RTC_U32SECS_REG_RD(),
RTC_U16MSEC_REG_RD());
ullMsec += SCC_U64MSEC_GET();
}
*ulSecs = RTC_SECS_IN_U64MSEC(ullMsec);
*usMsec = RTC_MSEC_IN_U64MSEC(ullMsec);
return;
}
//*****************************************************************************
//
//! Set a calendar time alarm.
//!
//! \param ulSecs refers to the seconds part of the calendar time
//! \param usMsec refers to the fractional (ms) part of the second
//!
//! This function sets an wall-clock alarm in the device to be reported for a
//! futuristic calendar time. The calendar time is outlined in terms of seconds
//! and milliseconds.
//!
//! The device provides uses the calendar value that has been maintained across
//! active and low power states to report attainment of alarm time.
//!
//! The function PRCMRTCSet() must have been invoked once to set a reference.
//!
//! \return None.
//
//*****************************************************************************
void PRCMRTCMatchSet(unsigned long ulSecs, unsigned short usMsec)
{
unsigned long long ullMsec = 0;
if(IS_RTC_USED()) {
ullMsec = RTC_U64MSEC_MK(ulSecs, usMsec);
ullMsec -= RTC_U64MSEC_MK(RTC_U32SECS_REG_RD(),
RTC_U16MSEC_REG_RD());
SCC_U64MSEC_MATCH_SET(SELECT_SCC_U42BITS(ullMsec));
}
return;
}
//*****************************************************************************
//
//! Get a previously set calendar time alarm.
//!
//! \param ulSecs refers to the seconds part of the calendar time
//! \param usMsec refers to the fractional (ms) part of the second
//!
//! This function fetches from the device a wall-clock alarm that would have
//! been previously set in the device. The calendar time is outlined in terms
//! of seconds and milliseconds.
//!
//! If no alarm was set in the past, then this function would fetch a random
//! information.
//!
//! The function PRCMRTCMatchSet() must have been invoked once to set an alarm.
//!
//! \return None.
//
//*****************************************************************************
void PRCMRTCMatchGet(unsigned long *ulSecs, unsigned short *usMsec)
{
unsigned long long ullMsec = 0;
if(IS_RTC_USED()) {
ullMsec = SCC_U64MSEC_MATCH_GET();
ullMsec += RTC_U64MSEC_MK(RTC_U32SECS_REG_RD(),
RTC_U16MSEC_REG_RD());
}
*ulSecs = RTC_SECS_IN_U64MSEC(ullMsec);
*usMsec = RTC_MSEC_IN_U64MSEC(ullMsec);
return;
}
//*****************************************************************************
//
//! MCU Initialization Routine
//!
//! This function sets mandatory configurations for the MCU
//!
//! \return None
//
//*****************************************************************************
void PRCMCC3200MCUInit()
{
if( PRCMSysResetCauseGet() != PRCM_LPDS_EXIT )
{
#ifdef CC3200_ES_1_2_1
unsigned long ulRegVal;
//
// DIG DCDC NFET SEL and COT mode disable
//
HWREG(0x4402F010) = 0x30031820;
HWREG(0x4402F00C) = 0x04000000;
UtilsDelay(32000);
//
// ANA DCDC clock config
//
HWREG(0x4402F11C) = 0x099;
HWREG(0x4402F11C) = 0x0AA;
HWREG(0x4402F11C) = 0x1AA;
//
// PA DCDC clock config
//
HWREG(0x4402F124) = 0x099;
HWREG(0x4402F124) = 0x0AA;
HWREG(0x4402F124) = 0x1AA;
//
// TD Flash timing configurations in case of MCU WDT reset
//
if((HWREG(0x4402D00C) & 0xFF) == 0x00000005)
{
HWREG(0x400F707C) |= 0x01840082;
HWREG(0x400F70C4)= 0x1;
HWREG(0x400F70C4)= 0x0;
}
//
// Take I2C semaphore
//
ulRegVal = HWREG(0x400F7000);
ulRegVal = (ulRegVal & ~0x3) | 0x1;
HWREG(0x400F7000) = ulRegVal;
//
// Take GPIO semaphore
//
ulRegVal = HWREG(0x400F703C);
ulRegVal = (ulRegVal & ~0x3FF) | 0x155;
HWREG(0x400F703C) = ulRegVal;
//
// Enable 32KHz internal RC oscillator
//
PRCMHIBRegWrite(HIB3P3_BASE+HIB3P3_O_MEM_INT_OSC_CONF, 0x00000101);
//
// Delay for a little bit.
//
UtilsDelay(8000);
//
// Enable 16MHz clock
//
HWREG(HIB1P2_BASE+HIB1P2_O_CM_OSC_16M_CONFIG) = 0x00010008;
//
// Delay for a little bit.
//
UtilsDelay(8000);
#else
unsigned long ulRegValue;
//
// DIG DCDC LPDS ECO Enable
//
HWREG(0x4402F064) |= 0x800000;
//
// Enable hibernate ECO for PG 1.32 devices only. With this ECO enabled,
// any hibernate wakeup source will be kept maked until the device enters
// hibernate completely (analog + digital)
//
ulRegValue = PRCMHIBRegRead(HIB3P3_BASE + HIB3P3_O_MEM_HIB_REG0);
PRCMHIBRegWrite(HIB3P3_BASE + HIB3P3_O_MEM_HIB_REG0, ulRegValue | (1<<4));
//
// Handling the clock switching (for 1.32 only)
//
HWREG(0x4402E16C) |= 0x3C;
#endif
//
// Enable uDMA
//
PRCMPeripheralClkEnable(PRCM_UDMA,PRCM_RUN_MODE_CLK);
//
// Reset uDMA
//
PRCMPeripheralReset(PRCM_UDMA);
//
// Disable uDMA
//
PRCMPeripheralClkDisable(PRCM_UDMA,PRCM_RUN_MODE_CLK);
//
// Enable RTC
//
if(PRCMSysResetCauseGet()== PRCM_POWER_ON)
{
PRCMHIBRegWrite(0x4402F804,0x1);
}
//
// SWD mode
//
if(((HWREG(0x4402F0C8) & 0xFF) == 0x2))
{
HWREG(0x4402E110) = ((HWREG(0x4402E110) & ~0xC0F) | 0x2);
HWREG(0x4402E114) = ((HWREG(0x4402E110) & ~0xC0F) | 0x2);
}
//
// Override JTAG mux
//
HWREG(0x4402E184) |= 0x2;
//
// Change UART pins(55,57) mode to PIN_MODE_0 if they are in PIN_MODE_3
//
if( (HWREG(0x4402E0A4) & 0xF) == 0x3)
{
HWREG(0x4402E0A4) = ((HWREG(0x4402E0A4) & ~0xF));
}
if( (HWREG(0x4402E0A8) & 0xF) == 0x3)
{
HWREG(0x4402E0A8) = ((HWREG(0x4402E0A8) & ~0xF));
}
//
// DIG DCDC VOUT trim settings based on PROCESS INDICATOR
//
if(((HWREG(0x4402DC78) >> 22) & 0xF) == 0xE)
{
HWREG(0x4402F0B0) = ((HWREG(0x4402F0B0) & ~(0x00FC0000))|(0x32 << 18));
}
else
{
HWREG(0x4402F0B0) = ((HWREG(0x4402F0B0) & ~(0x00FC0000))|(0x29 << 18));
}
//
// Enable SOFT RESTART in case of DIG DCDC collapse
//
HWREG(0x4402FC74) &= ~(0x10000000);
//
// Disable the sleep for ANA DCDC
//
HWREG(0x4402F0A8) |= 0x00000004 ;
}
else
{
unsigned long ulRegVal;
//
// I2C Configuration
//
ulRegVal = HWREG(COMMON_REG_BASE + COMMON_REG_O_I2C_Properties_Register);
ulRegVal = (ulRegVal & ~0x3) | 0x1;
HWREG(COMMON_REG_BASE + COMMON_REG_O_I2C_Properties_Register) = ulRegVal;
//
// GPIO configuration
//
ulRegVal = HWREG(COMMON_REG_BASE + COMMON_REG_O_GPIO_properties_register);
ulRegVal = (ulRegVal & ~0x3FF) | 0x155;
HWREG(COMMON_REG_BASE + COMMON_REG_O_GPIO_properties_register) = ulRegVal;
}
}
//*****************************************************************************
//
//! Reads 32-bit value from register at specified address
//!
//! \param ulRegAddr is the address of register to be read.
//!
//! This function reads 32-bit value from the register as specified by
//! \e ulRegAddr.
//!
//! \return Return the value of the register.
//
//*****************************************************************************
unsigned long PRCMHIBRegRead(unsigned long ulRegAddr)
{
unsigned long ulValue;
//
// Read the Reg value
//
ulValue = HWREG(ulRegAddr);
//
// Wait for 200 uSec
//
UtilsDelay((80*200)/3);
//
// Return the value
//
return ulValue;
}
//*****************************************************************************
//
//! Writes 32-bit value to register at specified address
//!
//! \param ulRegAddr is the address of register to be read.
//! \param ulValue is the 32-bit value to be written.
//!
//! This function writes 32-bit value passed as \e ulValue to the register as
//! specified by \e ulRegAddr
//!
//! \return None
//
//*****************************************************************************
void PRCMHIBRegWrite(unsigned long ulRegAddr, unsigned long ulValue)
{
//
// Read the Reg value
//
HWREG(ulRegAddr) = ulValue;
//
// Wait for 200 uSec
//
UtilsDelay((80*200)/3);
}
//*****************************************************************************
//
//! \param ulDivider is clock frequency divider value
//! \param ulWidth is the width of the high pulse
//!
//! This function sets the input frequency for camera module.
//!
//! The frequency is calculated as follows:
//!
//! f_out = 240MHz/ulDivider;
//!
//! The parameter \e ulWidth sets the width of the high pulse.
//!
//! For e.g.:
//!
//! ulDivider = 4;
//! ulWidth = 2;
//!
//! f_out = 30 MHz and 50% duty cycle
//!
//! And,
//!
//! ulDivider = 4;
//! ulWidth = 1;
//!
//! f_out = 30 MHz and 25% duty cycle
//!
//! \return 0 on success, 1 on error
//
//*****************************************************************************
unsigned long PRCMCameraFreqSet(unsigned char ulDivider, unsigned char ulWidth)
{
if(ulDivider > ulWidth && ulWidth != 0 )
{
//
// Set the hifh pulse width
//
HWREG(ARCM_BASE +
APPS_RCM_O_CAMERA_CLK_GEN) = (((ulWidth & 0x07) -1) << 8);
//
// Set the low pulse width
//
HWREG(ARCM_BASE +
APPS_RCM_O_CAMERA_CLK_GEN) = ((ulDivider - ulWidth - 1) & 0x07);
//
// Return success
//
return 0;
}
//
// Success;
//
return 1;
}
//*****************************************************************************
//
// Close the Doxygen group.
//! @}
//
//*****************************************************************************
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