rt-thread-official/bsp/n32g452xx/Libraries/rt_drivers/drv_flash.c

212 lines
4.3 KiB
C
Raw Normal View History

/*
2023-02-11 08:14:33 +08:00
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-08-20 breo.com first version
*/
#include <stddef.h>
#include <board.h>
#include <rtthread.h>
#ifdef BSP_USING_ON_CHIP_FLASH
#include "drv_flash.h"
#if defined(RT_USING_FAL)
#include "fal.h"
#endif
//#define DRV_DEBUG
#define LOG_TAG "drv.flash"
#include <drv_log.h>
/**
* @brief Gets the page of a given address
* @param addr: address of the flash memory
* @retval The page of a given address
*/
static rt_uint32_t get_page(uint32_t addr)
{
rt_uint32_t page = 0;
page = RT_ALIGN_DOWN(addr, FLASH_PAGE_SIZE);
return page;
}
/**
* Read data from flash.
* @note This operation's units is word.
*
* @param addr flash address
* @param buf buffer to store read data
* @param size read bytes size
*
* @return result
*/
int n32_flash_read(rt_uint32_t addr, rt_uint8_t *buf, size_t size)
{
size_t i;
if ((addr + size) > N32_FLASH_END_ADDRESS)
{
LOG_E("read outrange flash size! addr is (0x%p)", (void *)(addr + size));
return -RT_EINVAL;
}
for (i = 0; i < size; i++, buf++, addr++)
{
*buf = *(rt_uint8_t *) addr;
}
return size;
}
/**
* Write data to flash.
* @note This operation's units is word.
* @note This operation must after erase. @see flash_erase.
*
* @param addr flash address
* @param buf the write data buffer
* @param size write bytes size
*
* @return result
*/
int n32_flash_write(rt_uint32_t addr, const rt_uint8_t *buf, size_t size)
{
rt_err_t result = RT_EOK;
rt_uint32_t end_addr = addr + size;
if (addr % 4 != 0)
{
LOG_E("write addr must be 4-byte alignment");
return -RT_EINVAL;
}
if ((end_addr) > N32_FLASH_END_ADDRESS)
{
LOG_E("write outrange flash size! addr is (0x%p)", (void *)(addr + size));
return -RT_EINVAL;
}
FLASH_Unlock();
while (addr < end_addr)
{
if (FLASH_ProgramWord(addr, *((rt_uint32_t *)buf)) == FLASH_COMPL)
{
if (*(rt_uint32_t *)addr != *(rt_uint32_t *)buf)
{
result = -RT_ERROR;
break;
}
addr += 4;
buf += 4;
}
else
{
result = -RT_ERROR;
break;
}
}
FLASH_Lock();
if (result != RT_EOK)
{
return result;
}
return size;
}
/**
* Erase data on flash .
* @note This operation is irreversible.
* @note This operation's units is different which on many chips.
*
* @param addr flash address
* @param size erase bytes size
*
* @return result
*/
int n32_flash_erase(rt_uint32_t addr, size_t size)
{
rt_err_t result = RT_EOK;
rt_uint32_t end_addr = addr + size;
rt_uint32_t page_addr = 0;
FLASH_Unlock();
if ((end_addr) > N32_FLASH_END_ADDRESS)
{
LOG_E("erase outrange flash size! addr is (0x%p)", (void *)(addr + size));
return -RT_EINVAL;
}
while (addr < end_addr)
{
page_addr = get_page(addr);
if (FLASH_EraseOnePage(page_addr) != FLASH_COMPL)
{
result = -RT_ERROR;
goto __exit;
}
addr += FLASH_PAGE_SIZE;
}
FLASH_Lock();
__exit:
if (result != RT_EOK)
{
return result;
}
return size;
}
#if defined(RT_USING_FAL)
static int fal_flash_read(long offset, rt_uint8_t *buf, size_t size);
static int fal_flash_write(long offset, const rt_uint8_t *buf, size_t size);
static int fal_flash_erase(long offset, size_t size);
const struct fal_flash_dev n32_onchip_flash =
{
"onchip_flash",
N32_FLASH_START_ADRESS,
N32_FLASH_SIZE,
FLASH_PAGE_SIZE,
{
NULL,
fal_flash_read,
fal_flash_write,
fal_flash_erase
}
};
static int fal_flash_read(long offset, rt_uint8_t *buf, size_t size)
{
return n32_flash_read(n32_onchip_flash.addr + offset, buf, size);
}
static int fal_flash_write(long offset, const rt_uint8_t *buf, size_t size)
{
return n32_flash_write(n32_onchip_flash.addr + offset, buf, size);
}
static int fal_flash_erase(long offset, size_t size)
{
return n32_flash_erase(n32_onchip_flash.addr + offset, size);
}
#endif
#endif /* BSP_USING_ON_CHIP_FLASH */