#include "libmaple.h"
#include "util.h"
//#include "flash.h"
#include "flash_stm32.h"
typedef struct
{
__io uint32 ACR; /*!< FLASH access control register, Address offset: 0x00 */
__io uint32 KEYR; /*!< FLASH key register, Address offset: 0x04 */
__io uint32 OPTKEYR; /*!< FLASH option key register, Address offset: 0x08 */
__io uint32 SR; /*!< FLASH status register, Address offset: 0x0C */
__io uint32 CR; /*!< FLASH control register, Address offset: 0x10 */
__io uint32 OPTCR; /*!< FLASH option control register, Address offset: 0x14 */
} FLASH_TypeDef;
#define PERIPH_BASE ((uint32)0x40000000) /*!< Peripheral base address in the alias region */
#define AHB1PERIPH_BASE (PERIPH_BASE + 0x00020000)
#define FLASH_R_BASE (AHB1PERIPH_BASE + 0x3C00)
#define FLASH ((FLASH_TypeDef *) FLASH_R_BASE)
#define FLASH_FLAG_EOP ((uint32)0x00000001) /*!< FLASH End of Operation flag */
#define FLASH_FLAG_OPERR ((uint32)0x00000002) /*!< FLASH operation Error flag */
#define FLASH_FLAG_WRPERR ((uint32)0x00000010) /*!< FLASH Write protected error flag */
#define FLASH_FLAG_PGAERR ((uint32)0x00000020) /*!< FLASH Programming Alignment error flag */
#define FLASH_FLAG_PGPERR ((uint32)0x00000040) /*!< FLASH Programming Parallelism error flag */
#define FLASH_FLAG_PGSERR ((uint32)0x00000080) /*!< FLASH Programming Sequence error flag */
#define FLASH_FLAG_BSY ((uint32)0x00010000) /*!< FLASH Busy flag */
#define FLASH_PSIZE_BYTE ((uint32)0x00000000)
#define FLASH_PSIZE_HALF_WORD ((uint32)0x00000100)
#define FLASH_PSIZE_WORD ((uint32)0x00000200)
#define FLASH_PSIZE_DOUBLE_WORD ((uint32)0x00000300)
#define CR_PSIZE_MASK ((uint32)0xFFFFFCFF)
#define SECTOR_MASK ((uint32)0xFFFFFF07)
/******************* Bits definition for FLASH_CR register ******************/
#define FLASH_CR_PG ((uint32)0x00000001)
#define FLASH_CR_SER ((uint32)0x00000002)
#define FLASH_CR_MER ((uint32)0x00000004)
#define FLASH_CR_SNB_0 ((uint32)0x00000008)
#define FLASH_CR_SNB_1 ((uint32)0x00000010)
#define FLASH_CR_SNB_2 ((uint32)0x00000020)
#define FLASH_CR_SNB_3 ((uint32)0x00000040)
#define FLASH_CR_PSIZE_0 ((uint32)0x00000100)
#define FLASH_CR_PSIZE_1 ((uint32)0x00000200)
#define FLASH_CR_STRT ((uint32)0x00010000)
#define FLASH_CR_EOPIE ((uint32)0x01000000)
#define FLASH_CR_LOCK ((uint32)0x80000000)
#define FLASH_KEY1 ((uint32)0x45670123)
#define FLASH_KEY2 ((uint32)0xCDEF89AB)
/* Delay definition */
#define EraseTimeout ((uint32)0x00000FFF)
#define ProgramTimeout ((uint32)0x0000001F)
#define VoltageRange_1 ((uint8)0x00) /*!< Device operating range: 1.8V to 2.1V */
#define VoltageRange_2 ((uint8)0x01) /*!<Device operating range: 2.1V to 2.7V */
#define VoltageRange_3 ((uint8)0x02) /*!<Device operating range: 2.7V to 3.6V */
#define VoltageRange_4 ((uint8)0x03) /*!<Device operating range: 2.7V to 3.6V + External Vpp */
#define IS_VOLTAGERANGE(RANGE)(((RANGE) == VoltageRange_1) || \
((RANGE) == VoltageRange_2) || \
((RANGE) == VoltageRange_3) || \
((RANGE) == VoltageRange_4))
/**
* @brief Inserts a time delay.
* @param None
* @retval None
*/
static void delay(void)
{
__io uint32 i = 0;
for(i = 0xFF; i != 0; i--) { }
}
/**
* @brief Returns the FLASH Status.
* @param None
* @retval FLASH Status: The returned value can be: FLASH_BUSY, FLASH_ERROR_PROGRAM,
* FLASH_ERROR_WRP, FLASH_ERROR_OPERATION or FLASH_COMPLETE.
*/
FLASH_Status FLASH_GetStatus(void)
{
FLASH_Status flashstatus = FLASH_COMPLETE;
if((FLASH->SR & FLASH_FLAG_BSY) == FLASH_FLAG_BSY)
{
flashstatus = FLASH_BUSY;
}
else
{
if((FLASH->SR & FLASH_FLAG_WRPERR) != 0)
{
flashstatus = FLASH_ERROR_WRP;
}
else
{
if((FLASH->SR & 0xEF) != 0)
{
flashstatus = FLASH_ERROR_PROGRAM;
}
else
{
if((FLASH->SR & FLASH_FLAG_OPERR) != 0)
{
flashstatus = FLASH_ERROR_OPERATION;
}
else
{
flashstatus = FLASH_COMPLETE;
}
}
}
}
/* Return the FLASH Status */
return flashstatus;
}
/**
* @brief Waits for a Flash operation to complete or a TIMEOUT to occur.
* @param Timeout: FLASH progamming Timeout
* @retval FLASH Status: The returned value can be: FLASH_ERROR_PG,
* FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
*/
FLASH_Status FLASH_WaitForLastOperation(uint32 Timeout)
{
FLASH_Status status;
/* Check for the Flash Status */
status = FLASH_GetStatus();
/* Wait for a Flash operation to complete or a TIMEOUT to occur */
while((status == FLASH_BUSY) && (Timeout != 0x00))
{
delay();
status = FLASH_GetStatus();
Timeout--;
}
if (Timeout == 0)
status = FLASH_TIMEOUT;
/* Return the operation status */
return status;
}
/**
* @brief Erases a specified FLASH Sector.
*
* @param FLASH_Sector: The Sector number to be erased.
* This parameter can be a value between FLASH_Sector_0 and FLASH_Sector_11
*
* @param VoltageRange: The device voltage range which defines the erase parallelism.
* This parameter can be one of the following values:
* @arg VoltageRange_1: when the device voltage range is 1.8V to 2.1V,
* the operation will be done by byte (8-bit)
* @arg VoltageRange_2: when the device voltage range is 2.1V to 2.7V,
* the operation will be done by half word (16-bit)
* @arg VoltageRange_3: when the device voltage range is 2.7V to 3.6V,
* the operation will be done by word (32-bit)
* @arg VoltageRange_4: when the device voltage range is 2.7V to 3.6V + External Vpp,
* the operation will be done by double word (64-bit)
*
* @retval FLASH Status: The returned value can be: FLASH_BUSY, FLASH_ERROR_PROGRAM,
* FLASH_ERROR_WRP, FLASH_ERROR_OPERATION or FLASH_COMPLETE.
*/
FLASH_Status FLASH_EraseSector(uint32 FLASH_Sector, uint8 VoltageRange)
{
uint32 tmp_psize = 0x0;
FLASH_Status status = FLASH_COMPLETE;
/* Check the parameters */
//assert_param(IS_FLASH_SECTOR(FLASH_Sector));
//assert_param(IS_VOLTAGERANGE(VoltageRange));
if(VoltageRange == VoltageRange_1)
{
tmp_psize = FLASH_PSIZE_BYTE;
}
else if(VoltageRange == VoltageRange_2)
{
tmp_psize = FLASH_PSIZE_HALF_WORD;
}
else if(VoltageRange == VoltageRange_3)
{
tmp_psize = FLASH_PSIZE_WORD;
}
else
{
tmp_psize = FLASH_PSIZE_DOUBLE_WORD;
}
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(EraseTimeout);
if(status == FLASH_COMPLETE)
{
/* if the previous operation is completed, proceed to erase the sector */
FLASH->CR &= CR_PSIZE_MASK;
FLASH->CR |= tmp_psize;
FLASH->CR &= SECTOR_MASK;
FLASH->CR |= FLASH_CR_SER | FLASH_Sector;
FLASH->CR |= FLASH_CR_STRT;
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(EraseTimeout);
/* if the erase operation is completed, disable the SER Bit */
FLASH->CR &= (~FLASH_CR_SER);
FLASH->CR &= SECTOR_MASK;
}
/* Return the Erase Status */
return status;
}
/**
* @brief Erases a specified FLASH page.
* @param Page_Address: The page address to be erased.
* @retval FLASH Status: The returned value can be: FLASH_BUSY, FLASH_ERROR_PG,
* FLASH_ERROR_WRP, FLASH_COMPLETE or FLASH_TIMEOUT.
*/
FLASH_Status FLASH_ErasePage(uint32 Page_Address)
{
int Page_Offset = Page_Address - 0x08000000;
uint32 FLASH_Sector;
if(Page_Offset < 0x10000) {
FLASH_Sector = Page_Offset / 0x4000;
} else if(Page_Offset < 0x20000) {
FLASH_Sector = 4;
} else {
FLASH_Sector = 4 + Page_Offset / 0x20000;
}
return FLASH_EraseSector(8 * FLASH_Sector, VoltageRange_4);
}
/**
* @brief Programs a half word (16-bit) at a specified address.
* @note This function must be used when the device voltage range is from 2.1V to 3.6V.
* @param Address: specifies the address to be programmed.
* This parameter can be any address in Program memory zone or in OTP zone.
* @param Data: specifies the data to be programmed.
* @retval FLASH Status: The returned value can be: FLASH_BUSY, FLASH_ERROR_PROGRAM,
* FLASH_ERROR_WRP, FLASH_ERROR_OPERATION or FLASH_COMPLETE.
*/
FLASH_Status FLASH_ProgramHalfWord(uint32 Address, uint16 Data)
{
FLASH_Status status = FLASH_BAD_ADDRESS;
if (IS_FLASH_ADDRESS(Address))
{
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(ProgramTimeout);
if(status == FLASH_COMPLETE)
{
/* if the previous operation is completed, proceed to program the new data */
FLASH->CR &= CR_PSIZE_MASK;
FLASH->CR |= FLASH_PSIZE_HALF_WORD;
FLASH->CR |= FLASH_CR_PG;
*(__io uint16*)Address = Data;
/* Wait for last operation to be completed */
status = FLASH_WaitForLastOperation(ProgramTimeout);
if(status != FLASH_TIMEOUT)
{
/* if the program operation is completed, disable the PG Bit */
FLASH->CR &= (~FLASH_CR_PG);
}
}
}
/* Return the Program Status */
return status;
}
/**
* @brief Unlocks the FLASH control register access
* @param None
* @retval None
*/
void FLASH_Unlock(void)
{
if((FLASH->CR & FLASH_CR_LOCK) != 0)
{
/* Authorize the FLASH Registers access */
FLASH->KEYR = FLASH_KEY1;
FLASH->KEYR = FLASH_KEY2;
}
}
/**
* @brief Locks the FLASH control register access
* @param None
* @retval None
*/
void FLASH_Lock(void)
{
/* Set the LOCK Bit to lock the FLASH Registers access */
FLASH->CR |= FLASH_CR_LOCK;
}