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225 lines
8.2 KiB
C
225 lines
8.2 KiB
C
/******************************************************************************
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* Filename: aon_wuc.c
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* Revised: 2017-06-05 12:13:49 +0200 (Mon, 05 Jun 2017)
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* Revision: 49096
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*
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* Description: Driver for the AON Wake-Up Controller.
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*
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* Copyright (c) 2015 - 2017, Texas Instruments Incorporated
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3) Neither the name of the ORGANIZATION nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************/
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#include "aon_wuc.h"
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//*****************************************************************************
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//
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// Handle support for DriverLib in ROM:
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// This section will undo prototype renaming made in the header file
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//
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//*****************************************************************************
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#if !defined(DOXYGEN)
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#undef AONWUCAuxReset
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#define AONWUCAuxReset NOROM_AONWUCAuxReset
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#undef AONWUCRechargeCtrlConfigSet
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#define AONWUCRechargeCtrlConfigSet NOROM_AONWUCRechargeCtrlConfigSet
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#undef AONWUCOscConfig
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#define AONWUCOscConfig NOROM_AONWUCOscConfig
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#endif
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//*****************************************************************************
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//
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//! Reset the AUX domain
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//
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//*****************************************************************************
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void
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AONWUCAuxReset(void)
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{
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// Reset the AUX domain.
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// HWREG(AON_WUC_BASE + AON_WUC_O_AUXCTL) |= AON_WUC_AUXCTL_RESET_REQ; // ROM version
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HWREGBITW(AON_WUC_BASE + AON_WUC_O_AUXCTL, AON_WUC_AUXCTL_RESET_REQ_BITN) = 1;
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// Wait for AON interface to be in sync.
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HWREG(AON_RTC_BASE + AON_RTC_O_SYNC);
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// De-assert reset on the AUX domain.
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// HWREG(AON_WUC_BASE + AON_WUC_O_AUXCTL) &= ~AON_WUC_AUXCTL_RESET_REQ; // ROM version
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HWREGBITW(AON_WUC_BASE + AON_WUC_O_AUXCTL, AON_WUC_AUXCTL_RESET_REQ_BITN) = 0;
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// Wait for AON interface to be in sync.
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HWREG(AON_RTC_BASE + AON_RTC_O_SYNC);
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}
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//*****************************************************************************
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//
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//! Configure the recharge controller
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//
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//*****************************************************************************
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void
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AONWUCRechargeCtrlConfigSet(bool bAdaptEnable, uint32_t ui32AdaptRate,
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uint32_t ui32Period, uint32_t ui32MaxPeriod)
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{
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uint32_t ui32Shift;
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uint32_t ui32C1;
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uint32_t ui32C2;
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uint32_t ui32Reg;
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uint32_t ui32Exponent;
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uint32_t ui32MaxExponent;
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uint32_t ui32Mantissa;
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uint32_t ui32MaxMantissa;
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// Check the arguments.
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ASSERT((ui32AdaptRate >= RC_RATE_MIN) ||
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(ui32AdaptRate <= RC_RATE_MAX));
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ui32C1 = 0;
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ui32C2 = 0;
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ui32Shift = 9;
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// Clear the previous values.
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ui32Reg = HWREG(AON_WUC_BASE + AON_WUC_O_RECHARGECFG);
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ui32Reg &= ~(AON_WUC_RECHARGECFG_MAX_PER_M_M | AON_WUC_RECHARGECFG_MAX_PER_E_M |
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AON_WUC_RECHARGECFG_ADAPTIVE_EN_M | AON_WUC_RECHARGECFG_PER_M_M |
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AON_WUC_RECHARGECFG_PER_E_M | AON_WUC_RECHARGECFG_C1_M |
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AON_WUC_RECHARGECFG_C2_M);
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// Check if the recharge controller adaptation algorithm should be active.
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if(bAdaptEnable)
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{
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// Calculate adaptation parameters.
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while(ui32AdaptRate)
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{
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if(ui32AdaptRate & (1 << ui32Shift))
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{
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if(!ui32C1)
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{
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ui32C1 = ui32Shift;
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}
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else if(!ui32C2)
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{
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if((2 * ui32AdaptRate) > ((uint32_t)(3 << ui32Shift)))
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{
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ui32C2 = ui32Shift + 1;
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}
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else
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{
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ui32C2 = ui32Shift;
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}
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}
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else
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{
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break;
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}
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ui32AdaptRate &= ~(1 << ui32Shift);
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}
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ui32Shift--;
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}
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if(!ui32C2)
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{
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ui32C2 = ui32C1 = ui32C1 - 1;
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}
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ui32C1 = 10 - ui32C1;
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ui32C2 = 10 - ui32C2;
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// Update the recharge rate parameters.
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ui32Reg &= ~(AON_WUC_RECHARGECFG_C1_M | AON_WUC_RECHARGECFG_C2_M);
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ui32Reg |= (ui32C1 << AON_WUC_RECHARGECFG_C1_S) |
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(ui32C2 << AON_WUC_RECHARGECFG_C2_S) |
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AON_WUC_RECHARGECFG_ADAPTIVE_EN_M;
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}
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// Resolve the period into an exponent and mantissa.
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ui32Period = (ui32Period >> 4);
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ui32Exponent = 0;
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while(ui32Period > (AON_WUC_RECHARGECFG_PER_M_M >> AON_WUC_RECHARGECFG_PER_M_S))
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{
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ui32Period >>= 1;
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ui32Exponent++;
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}
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ui32Mantissa = ui32Period;
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// Resolve the max period into an exponent and mantissa.
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ui32MaxPeriod = (ui32MaxPeriod >> 4);
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ui32MaxExponent = 0;
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while(ui32MaxPeriod > (AON_WUC_RECHARGECFG_MAX_PER_M_M >> AON_WUC_RECHARGECFG_MAX_PER_M_S))
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{
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ui32MaxPeriod >>= 1;
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ui32MaxExponent++;
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}
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ui32MaxMantissa = ui32MaxPeriod;
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// Configure the controller.
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ui32Reg |= ((ui32MaxMantissa << AON_WUC_RECHARGECFG_MAX_PER_M_S) |
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(ui32MaxExponent << AON_WUC_RECHARGECFG_MAX_PER_E_S) |
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(ui32Mantissa << AON_WUC_RECHARGECFG_PER_M_S) |
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(ui32Exponent << AON_WUC_RECHARGECFG_PER_E_S));
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HWREG(AON_WUC_BASE + AON_WUC_O_RECHARGECFG) = ui32Reg;
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}
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//*****************************************************************************
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//
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//! Configure the interval for oscillator amplitude calibration
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//
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//*****************************************************************************
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void
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AONWUCOscConfig(uint32_t ui32Period)
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{
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uint32_t ui32Mantissa;
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uint32_t ui32Exponent;
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uint32_t ui32Reg;
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// Resolve the period into a exponent and mantissa.
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ui32Period = (ui32Period >> 4);
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ui32Exponent = 0;
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while(ui32Period > (AON_WUC_OSCCFG_PER_M_M >> AON_WUC_OSCCFG_PER_M_S))
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{
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ui32Period >>= 1;
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ui32Exponent++;
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}
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ui32Mantissa = ui32Period;
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// Update the period for the oscillator amplitude calibration.
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HWREG(AON_WUC_BASE + AON_WUC_O_OSCCFG) =
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(ui32Mantissa << AON_WUC_OSCCFG_PER_M_S) |
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(ui32Exponent << AON_WUC_OSCCFG_PER_E_S);
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// Set the maximum recharge period equal to the oscillator amplitude
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// calibration period.
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ui32Reg = HWREG(AON_WUC_BASE + AON_WUC_O_RECHARGECFG);
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ui32Reg &= ~(AON_WUC_RECHARGECFG_MAX_PER_M_M | AON_WUC_RECHARGECFG_MAX_PER_E_M);
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ui32Reg |= ((ui32Mantissa << AON_WUC_RECHARGECFG_MAX_PER_M_S) |
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(ui32Exponent << AON_WUC_RECHARGECFG_MAX_PER_E_S));
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// Write the configuration.
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HWREG(AON_WUC_BASE + AON_WUC_O_RECHARGECFG) = ui32Reg;
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}
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