147 lines
5.0 KiB
C
147 lines
5.0 KiB
C
/*
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* @brief LPC8xx FLASH Memory Controller (FMC) driver
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*
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* @note
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* Copyright(C) NXP Semiconductors, 2013
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* All rights reserved.
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*
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* @par
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* Software that is described herein is for illustrative purposes only
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* which provides customers with programming information regarding the
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* LPC products. This software is supplied "AS IS" without any warranties of
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* any kind, and NXP Semiconductors and its licensor disclaim any and
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* all warranties, express or implied, including all implied warranties of
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* merchantability, fitness for a particular purpose and non-infringement of
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* intellectual property rights. NXP Semiconductors assumes no responsibility
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* or liability for the use of the software, conveys no license or rights under any
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* patent, copyright, mask work right, or any other intellectual property rights in
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* or to any products. NXP Semiconductors reserves the right to make changes
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* in the software without notification. NXP Semiconductors also makes no
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* representation or warranty that such application will be suitable for the
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* specified use without further testing or modification.
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*
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* @par
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* Permission to use, copy, modify, and distribute this software and its
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* documentation is hereby granted, under NXP Semiconductors' and its
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* licensor's relevant copyrights in the software, without fee, provided that it
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* is used in conjunction with NXP Semiconductors microcontrollers. This
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* copyright, permission, and disclaimer notice must appear in all copies of
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* this code.
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*/
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#ifndef __FMC_8XX_H_
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#define __FMC_8XX_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** @defgroup FMC_8XX CHIP: LPC8xx FLASH Memory Controller driver
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* @ingroup CHIP_8XX_Drivers
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* @{
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*/
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/**
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* @brief FLASH Memory Controller Unit register block structure
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*/
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typedef struct {
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__I uint32_t RESERVED1[4];
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__IO uint32_t FLASHCFG; /*!< Flash Configuration register */
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__I uint32_t RESERVED2[3];
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__IO uint32_t FMSSTART; /*!< Signature start address register */
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__IO uint32_t FMSSTOP; /*!< Signature stop address register */
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__I uint32_t RESERVED3;
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__I uint32_t FMSW[1]; /*!< Signature word regsiter */
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} LPC_FMC_T;
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/* Reserved bits masks for registers */
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#define FMC_FLASHCFG_RESERVED (~3)
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#define FMC_FMSSTART_RESERVED 0xfffe0000
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#define FMC_FMSSTOP_RESERVED 0x7ffe0000
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/**
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* @brief FLASH Access time definitions
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*/
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typedef enum {
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FLASHTIM_20MHZ_CPU = 0, /*!< Flash accesses use 1 CPU clocks. Use for up to 20 MHz CPU clock*/
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FLASHTIM_30MHZ_CPU = 1, /*!< Flash accesses use 2 CPU clocks. Use for up to 30 MHz CPU clock*/
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} FMC_FLASHTIM_T;
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/**
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* @brief Set FLASH memory access time in clocks
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* @param clks : Clock cycles for FLASH access
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* @return Nothing
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* @note For CPU speed up to 20MHz, use a value of 0. For up to 30MHz, use
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* a value of 1
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*/
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STATIC INLINE void Chip_FMC_SetFLASHAccess(FMC_FLASHTIM_T clks)
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{
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uint32_t tmp = LPC_FMC->FLASHCFG & (~((0x3)|FMC_FLASHCFG_RESERVED));
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/* Don't alter upper bits */
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LPC_FMC->FLASHCFG = tmp | clks;
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}
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/* Flash signature start and busy status bit */
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#define FMC_FLASHSIG_BUSY (1UL << 31)
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/**
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* @brief Start computation of a signature for a FLASH memory range
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* @param start : Starting FLASH address for computation, must be aligned on 16 byte boundary
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* @param stop : Ending FLASH address for computation, must be aligned on 16 byte boundary
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* @return Nothing
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* @note Only bits 20..4 are used for the FLASH signature computation.
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* Use the Chip_FMC_IsSignatureBusy() function to determine when the
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* signature computation operation is complete and the
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* Chip_FMC_GetSignature() function to get the computed signature.
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*/
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STATIC INLINE void Chip_FMC_ComputeSignature(uint32_t start, uint32_t stop)
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{
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LPC_FMC->FMSSTART = (start >> 4);
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LPC_FMC->FMSSTOP = (stop >> 4) | FMC_FLASHSIG_BUSY;
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}
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/**
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* @brief Start computation of a signature for a FLASH memory address and block count
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* @param start : Starting FLASH address for computation, must be aligned on 16 byte boundary
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* @param blocks : Number of 16 byte blocks used for computation
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* @return Nothing
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* @note Only bits 20..4 are used for the FLASH signature computation.
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* Use the Chip_FMC_IsSignatureBusy() function to determine when the
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* signature computation operation is complete and the
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* Chip_FMC_GetSignature() function to get the computed signature.
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*/
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STATIC INLINE void Chip_FMC_ComputeSignatureBlocks(uint32_t start, uint32_t blocks)
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{
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Chip_FMC_ComputeSignature(start, (start + (blocks * 16)));
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}
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/**
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* @brief Check for signature geenration completion
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* @return true if the signature computation is running, false if finished
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*/
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STATIC INLINE bool Chip_FMC_IsSignatureBusy(void)
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{
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return (bool) ((LPC_FMC->FMSSTOP & FMC_FLASHSIG_BUSY) != 0);
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}
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/**
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* @brief Returns the generated FLASH signature value
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* @param index : Signature index, must be 0
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* @return the generated FLASH signature value
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*/
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STATIC INLINE uint32_t Chip_FMC_GetSignature(int index)
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{
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return LPC_FMC->FMSW[index];
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}
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/**
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* @}
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*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* __FMC_8XX_H_ */
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