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STM32WB: Add FLASH HW Semaphore 

Because FLASH is a shared resource between the 2 STM32WB cores, SW needs
to acquire HW Semaphore before using the resource.
pull/9814/head
Laurent Meunier 2019-02-25 17:41:23 +01:00
parent 14ee4a1c7b
commit b21110d6b8
1 changed files with 22 additions and 0 deletions
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22
targets/TARGET_STM/TARGET_STM32WB/flash_api.c
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@ -23,6 +23,10 @@
#include "mbed_assert.h"
#include "cmsis.h"
/* Family specific include for WB with HW semaphores */
#include "hw.h"
#include "hw_conf.h"
/**
* @brief Gets the page of a given address
* @param Addr: Address of the FLASH Memory
@ -71,6 +75,11 @@ int32_t flash_erase_sector(flash_t *obj, uint32_t address)
return -1;
}
#if defined(CFG_HW_FLASH_SEMID)
/* In case RNG is a shared ressource, get the HW semaphore first */
while( LL_HSEM_1StepLock( HSEM, CFG_HW_FLASH_SEMID ) );
#endif
/* Unlock the Flash to enable the flash control register access */
if (HAL_FLASH_Unlock() != HAL_OK) {
return -1;
@ -99,6 +108,10 @@ int32_t flash_erase_sector(flash_t *obj, uint32_t address)
to protect the FLASH memory against possible unwanted operation) */
HAL_FLASH_Lock();
#if defined(CFG_HW_FLASH_SEMID)
LL_HSEM_ReleaseLock( HSEM, CFG_HW_FLASH_SEMID, 0 );
#endif
return status;
}
@ -126,6 +139,11 @@ int32_t flash_program_page(flash_t *obj, uint32_t address, const uint8_t *data,
return -1;
}
#if defined(CFG_HW_FLASH_SEMID)
/* In case RNG is a shared ressource, get the HW semaphore first */
while( LL_HSEM_1StepLock( HSEM, CFG_HW_FLASH_SEMID ) );
#endif
/* Unlock the Flash to enable the flash control register access */
if (HAL_FLASH_Unlock() != HAL_OK) {
return -1;
@ -163,6 +181,10 @@ int32_t flash_program_page(flash_t *obj, uint32_t address, const uint8_t *data,
to protect the FLASH memory against possible unwanted operation) */
HAL_FLASH_Lock();
#if defined(CFG_HW_FLASH_SEMID)
LL_HSEM_ReleaseLock( HSEM, CFG_HW_FLASH_SEMID, 0 );
#endif
return status;
}