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added initial flash wrapper implementation

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This commit is contained in:
Lars Wilko Sentse 2024-01-24 14:38:15 +01:00
parent e249963b4b
commit 65155392be
2 changed files with 90 additions and 0 deletions
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32
include/sta/devices/stm32/flash.hpp Normal file
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/*
* flash.hpp
*
* Created on: Jan 24, 2024
* Author: Lars Wilko Sentse
*/
#ifndef STA_CORE_FLASH_HPP
#define STA_CORE_FLASH_HPP
#include <limits>
// Only enable module on STM32 platform w/ HAL GPIO module enabled
#include <sta/config.hpp>
#ifdef STA_PLATFORM_STM32
# include <sta/devices/stm32/hal.hpp>
#endif // STA_PLATFORM_STM32
#include <sta/debug/debug.hpp>
namespace sta
{
class Flash{
public:
Flash() = delete;
static uint32_t flash_write_word(uint32_t address, uint32_t data, bool erase_sector);
static uint32_t flash_read_word(uint32_t address);
static uint32_t flash_erase_sectors(uint32_t sector, uint32_t num_sectors);
static uint32_t flash_get_sector(uint32_t address);
};
}//namespace sta
#endif //STA_CORE_FLASH_HPP

58
src/devices/stm32/flash.cpp Normal file
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/*
* flash.cpp
*
* Created on: Jan 24, 2024
* Author: Lars Wilko Sentse
*/
#include <sta/devices/stm32/flash.hpp>
namespace sta
{
uint32_t Flash::flash_write_word(uint32_t address, uint32_t data, bool erase_sector){
if(erase_sector){
uint32_t flash_error = flash_erase_sectors(flash_get_sector(address), 1);
if(flash_error != HAL_OK) return flash_error;
}
HAL_FLASH_Unlock();
if(HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, address, data));
HAL_FLASH_Lock();
return HAL_OK;
}
uint32_t Flash::flash_read_word(uint32_t address){
volatile uint32_t read_data = *(volatile uint32_t*)address;
return (uint32_t)read_data;
}
uint32_t Flash::flash_erase_sectors(uint32_t sector, uint32_t num_sectors){
static FLASH_EraseInitTypeDef erase_init;
erase_init.TypeErase = FLASH_TYPEERASE_SECTORS;
erase_init.VoltageRange = FLASH_VOLTAGE_RANGE_3;//don't know what this does
erase_init.Sector = sector;
erase_init.NbSectors = num_sectors;
uint32_t sector_error;
HAL_FLASH_Unlock();
if(HAL_FLASHEx_Erase(&erase_init, &sector_error) != HAL_OK) return HAL_FLASH_GetError();
HAL_FLASH_Lock();
return HAL_OK;
}
uint32_t Flash::flash_get_sector(uint32_t address){
if(address < FLASH_BASE || address > FLASH_END){
STA_DEBUG_PRINTF("[STA_FLASH] ADDRESS OUTSIDE [%#010x, %#010x]", FLASH_BASE, FLASH_END);
return std::numeric_limits<uint32_t>::max();
}
//TODO: assumes all sectors are the same size -> not true
// ( address without offset / flash size ) * number of sectors
return (uint32_t) ( ( (float)(address - (FLASH_BASE))/(float)(FLASH_END - FLASH_BASE) ) * FLASH_SECTOR_TOTAL );
// (0x0807FF00 - 0x08000000 = 0x007FF00) / (0x0807FFFF - 0x08000000 = 0x0007FFFF) = 524032 / 524287 = 0.999...
// 0.999... * 8 = 7.996... (uint32_t)->FLASH_SECTOR_7
}
}//namespace sta