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stm32: f247: flash: use common code.

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This shows what is _actually_ different for f7.  A couple of option
bits, and a renaming of bit 7 of the status register, from Program
Sequence Error to Erase Sequence Error.

We keep the separate implementation of wait_for_last_operation, to meet
the "suggestions" of the reference manual to insert a DSB instruction.

Keeping the renamed bit/functions also requires us to keep separate
implementations of the flag clearing functions
This commit is contained in:
Karl Palsson
2018-07-24 22:30:07 +00:00
parent 46d4103c1d
commit 231f21296f
9 changed files with 84 additions and 387 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
lib/stm32/f7/Makefile
View File

@@ -42,8 +42,9 @@ TGT_CFLAGS += $(STANDARD_FLAGS)
ARFLAGS = rcs
OBJS = flash_common_all.o flash_common_f.o flash.o pwr.o rcc.o
OBJS = flash_common_all.o flash_common_f.o flash_common_f24.o flash.o
OBJS += gpio.o gpio_common_all.o gpio_common_f0234.o
OBJS += pwr.o rcc.o
OBJS += rcc_common_all.o

280
lib/stm32/f7/flash.c
View File

@@ -27,21 +27,6 @@
#include <libopencm3/stm32/flash.h>
/*---------------------------------------------------------------------------*/
/** @brief Set the Program Parallelism Size
Set the programming word width. Note carefully the power supply voltage
restrictions under which the different word sizes may be used. See the
programming manual for more information.
@param[in] psize The programming word width one of: @ref flash_cr_program_width
*/
static inline void flash_set_program_size(uint32_t psize)
{
FLASH_CR &= ~(FLASH_CR_PROGRAM_MASK << FLASH_CR_PROGRAM_SHIFT);
FLASH_CR |= psize << FLASH_CR_PROGRAM_SHIFT;
}
/*---------------------------------------------------------------------------*/
/** @brief Issue Pipeline Stall
@@ -58,72 +43,42 @@ static inline void flash_pipeline_stall(void)
__asm__ volatile("dsb":::"memory");
}
/*---------------------------------------------------------------------------*/
/** @brief Clear the Programming Error Status Flag
*/
void flash_clear_pgperr_flag(void)
{
FLASH_SR |= FLASH_SR_PGPERR;
}
/*---------------------------------------------------------------------------*/
/** @brief Wait until Last Operation has Ended
This loops indefinitely until an operation (write or erase) has completed by
testing the busy flag.
*/
void flash_wait_for_last_operation(void)
{
flash_pipeline_stall();
while ((FLASH_SR & FLASH_SR_BSY) == FLASH_SR_BSY);
}
/*---------------------------------------------------------------------------*/
/** @brief Lock the Option Byte Access
This disables write access to the option bytes. It is locked by default on
reset.
*/
void flash_lock_option_bytes(void)
{
FLASH_OPTCR |= FLASH_OPTCR_OPTLOCK;
}
/*---------------------------------------------------------------------------*/
/** @brief Clear the Erase Sequence Error Flag
This flag is set when an erase operation is performed with control register has
not been correctly set.
*/
void flash_clear_erserr_flag(void)
{
FLASH_SR |= FLASH_SR_ERSERR;
}
/*---------------------------------------------------------------------------*/
/** @brief Clear the Programming Alignment Error Flag
/** @brief Clear All Status Flags
Program error, end of operation, write protect error.
*/
void flash_clear_pgaerr_flag(void)
void flash_clear_status_flags(void)
{
FLASH_SR |= FLASH_SR_PGAERR;
}
/*---------------------------------------------------------------------------*/
/** @brief Clear the Write Protect Error Flag
*/
void flash_clear_wrperr_flag(void)
{
FLASH_SR |= FLASH_SR_WRPERR;
flash_clear_erserr_flag();
flash_clear_pgaerr_flag();
flash_clear_wrperr_flag();
flash_clear_pgperr_flag();
flash_clear_eop_flag();
}
/*---------------------------------------------------------------------------*/
@@ -147,223 +102,4 @@ void flash_art_reset(void)
FLASH_ACR |= FLASH_ACR_ARTRST;
}
/*---------------------------------------------------------------------------*/
/** @brief Clear All Status Flags
Program error, end of operation, write protect error.
*/
void flash_clear_status_flags(void)
{
flash_clear_erserr_flag();
flash_clear_pgaerr_flag();
flash_clear_wrperr_flag();
flash_clear_pgperr_flag();
flash_clear_eop_flag();
}
/*---------------------------------------------------------------------------*/
/** @brief Erase All FLASH
This performs all operations necessary to erase all sectors in the FLASH
memory.
@param program_size: 0 (8-bit), 1 (16-bit), 2 (32-bit), 3 (64-bit)
*/
void flash_erase_all_sectors(uint32_t program_size)
{
flash_wait_for_last_operation();
flash_set_program_size(program_size);
FLASH_CR |= FLASH_CR_MER; /* Enable mass erase. */
FLASH_CR |= FLASH_CR_STRT; /* Trigger the erase. */
flash_wait_for_last_operation();
FLASH_CR &= ~FLASH_CR_MER; /* Disable mass erase. */
}
/*---------------------------------------------------------------------------*/
/** @brief Erase a Sector of FLASH
This performs all operations necessary to erase a sector in FLASH memory.
The page should be checked to ensure that it was properly erased. A sector must
first be fully erased before attempting to program it.
See the reference manual or the FLASH programming manual for details.
@param[in] sector (0 - 11 for some parts, 0-23 on others)
@param program_size: 0 (8-bit), 1 (16-bit), 2 (32-bit), 3 (64-bit)
*/
void flash_erase_sector(uint8_t sector, uint32_t program_size)
{
flash_wait_for_last_operation();
flash_set_program_size(program_size);
FLASH_CR &= ~(FLASH_CR_SNB_MASK << FLASH_CR_SNB_SHIFT);
FLASH_CR |= (sector & FLASH_CR_SNB_MASK) << FLASH_CR_SNB_SHIFT;
FLASH_CR |= FLASH_CR_SER;
FLASH_CR |= FLASH_CR_STRT;
flash_wait_for_last_operation();
FLASH_CR &= ~FLASH_CR_SER;
FLASH_CR &= ~(FLASH_CR_SNB_MASK << FLASH_CR_SNB_SHIFT);
}
/*---------------------------------------------------------------------------*/
/** @brief Program a 64 bit Word to FLASH
This performs all operations necessary to program a 64 bit word to FLASH memory.
The program error flag should be checked separately for the event that memory
was not properly erased.
@param[in] address Starting address in Flash.
@param[in] data Double word to write
*/
void flash_program_double_word(uint32_t address, uint64_t data)
{
/* Ensure that all flash operations are complete. */
flash_wait_for_last_operation();
flash_set_program_size(FLASH_CR_PROGRAM_X64);
/* Enable writes to flash. */
FLASH_CR |= FLASH_CR_PG;
/* Program the double_word. */
MMIO64(address) = data;
/* Wait for the write to complete. */
flash_wait_for_last_operation();
/* Disable writes to flash. */
FLASH_CR &= ~FLASH_CR_PG;
}
/*---------------------------------------------------------------------------*/
/** @brief Program a 32 bit Word to FLASH
This performs all operations necessary to program a 32 bit word to FLASH memory.
The program error flag should be checked separately for the event that memory
was not properly erased.
@param[in] address Starting address in Flash.
@param[in] data word to write
*/
void flash_program_word(uint32_t address, uint32_t data)
{
/* Ensure that all flash operations are complete. */
flash_wait_for_last_operation();
flash_set_program_size(FLASH_CR_PROGRAM_X32);
/* Enable writes to flash. */
FLASH_CR |= FLASH_CR_PG;
/* Program the word. */
MMIO32(address) = data;
/* Wait for the write to complete. */
flash_wait_for_last_operation();
/* Disable writes to flash. */
FLASH_CR &= ~FLASH_CR_PG;
}
/*---------------------------------------------------------------------------*/
/** @brief Program a Half Word to FLASH
This performs all operations necessary to program a 16 bit word to FLASH memory.
The program error flag should be checked separately for the event that memory
was not properly erased.
@param[in] address Starting address in Flash.
@param[in] data half word to write
*/
void flash_program_half_word(uint32_t address, uint16_t data)
{
flash_wait_for_last_operation();
flash_set_program_size(FLASH_CR_PROGRAM_X16);
FLASH_CR |= FLASH_CR_PG;
MMIO16(address) = data;
flash_wait_for_last_operation();
FLASH_CR &= ~FLASH_CR_PG; /* Disable the PG bit. */
}
/*---------------------------------------------------------------------------*/
/** @brief Program an 8 bit Byte to FLASH
This performs all operations necessary to program an 8 bit byte to FLASH memory.
The program error flag should be checked separately for the event that memory
was not properly erased.
@param[in] address Starting address in Flash.
@param[in] data byte to write
*/
void flash_program_byte(uint32_t address, uint8_t data)
{
flash_wait_for_last_operation();
flash_set_program_size(FLASH_CR_PROGRAM_X8);
FLASH_CR |= FLASH_CR_PG;
MMIO8(address) = data;
flash_wait_for_last_operation();
FLASH_CR &= ~FLASH_CR_PG; /* Disable the PG bit. */
}
/*---------------------------------------------------------------------------*/
/** @brief Program a Data Block to FLASH
This programs an arbitrary length data block to FLASH memory. All the addresses
written to must have been erased (by calling flash_erase_sector).
The program error flag should be checked separately for the event that memory
was not properly erased.
@param[in] address Starting address in Flash.
@param[in] data Pointer to start of data block.
@param[in] len Length of data block.
*/
void flash_program(uint32_t address, uint8_t *data, uint32_t len)
{
/* TODO: Use dword and word size program operations where possible for
* turbo speed.
*/
uint32_t i;
for (i = 0; i < len; i++) {
flash_program_byte(address+i, data[i]);
}
}
/*---------------------------------------------------------------------------*/
/** @brief Program the Option Bytes
This performs all operations necessary to program the option bytes.
The option bytes do not need to be erased first.
@param[in] data value to be programmed.
*/
void flash_program_option_bytes(uint32_t data)
{
flash_wait_for_last_operation();
if (FLASH_OPTCR & FLASH_OPTCR_OPTLOCK) {
flash_unlock_option_bytes();
}
FLASH_OPTCR = data & ~0x3;
FLASH_OPTCR |= FLASH_OPTCR_OPTSTRT; /* Enable option byte prog. */
flash_wait_for_last_operation();
}
/**@}*/