rt-thread/bsp/nrf5x/libraries/drivers/drv_flash.c

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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
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*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-04-29 supperthomas first version
*/
#include "board.h"
#include <nrfx.h>
#include "nrfx_nvmc.h"
#ifdef BSP_USING_ON_CHIP_FLASH
#if defined(RT_USING_FAL)
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#include "fal.h"
#endif
#include <rtdbg.h>
#define LOG_TAG "drv.flash"
/**
* @brief Gets the page of a given address
* @param Addr: Address of the FLASH Memory
* @retval The page of a given address
*/
static uint32_t GetPage(uint32_t Addr)
{
uint32_t page = 0;
if (Addr < (MCU_FLASH_START_ADDRESS + MCU_FLASH_SIZE))
{
page = (Addr - MCU_FLASH_START_ADDRESS) / MCU_FLASH_PAGE_SIZE;
}
else
{
return 0xffffffff;
}
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 mcu_flash_read(rt_uint32_t addr, rt_uint8_t *buf, size_t size)
{
size_t i;
if ((addr + size) > MCU_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 mcu_flash_write(rt_uint32_t addr, const uint8_t *buf, size_t size)
{
if ((addr + size) > MCU_FLASH_END_ADDRESS)
{
LOG_E("ERROR: write outrange flash size! addr is (0x%p)\n", (void *)(addr + size));
return -RT_EINVAL;
}
if (addr % 4 != 0)
{
LOG_E("write addr should be 4-byte alignment");
//4byte write
//else byts
return -RT_EINVAL;
}
if (size < 1)
{
return -RT_ERROR;
}
if (size % 4 != 0)
{
nrfx_nvmc_bytes_write(addr, buf, size);
return size;
}
else
{
nrfx_nvmc_words_write(addr, buf, size / 4);
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 mcu_flash_erase(rt_uint32_t addr, size_t size)
{
nrfx_err_t result = NRFX_SUCCESS;
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uint32_t FirstPage = 0, NbOfPages = 0;
if ((addr + size) > MCU_FLASH_END_ADDRESS)
{
LOG_E("ERROR: erase outrange flash size! addr is (0x%p)\n", (void *)(addr + size));
return -RT_EINVAL;
}
FirstPage = GetPage(addr);
NbOfPages = GetPage(addr + size - 1) - FirstPage + 1;
for (int i = 0; i < NbOfPages ; i++)
{
result = nrfx_nvmc_page_erase((FirstPage + i) * MCU_FLASH_PAGE_SIZE);
if (NRFX_SUCCESS != result)
{
LOG_E("ERROR: erase flash page %d ! error code is (%x)\n", FirstPage + i, result);
return -RT_EINVAL;
}
}
LOG_D("erase done: addr (0x%p), size %d", (void *)addr, NbOfPages * MCU_FLASH_PAGE_SIZE);
return size;
}
#if defined(RT_USING_FAL)
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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);
static int fal_flash_read(long offset, rt_uint8_t *buf, size_t size)
{
return mcu_flash_read(mcu_onchip_flash.addr + offset, buf, size);
}
static int fal_flash_write(long offset, const rt_uint8_t *buf, size_t size)
{
return mcu_flash_write(mcu_onchip_flash.addr + offset, buf, size);
}
static int fal_flash_erase(long offset, size_t size)
{
return mcu_flash_erase(mcu_onchip_flash.addr + offset, size);
}
const struct fal_flash_dev mcu_onchip_flash =
{
.name = ON_CHIP_FLASH_DEV_NAME,
.addr = MCU_FLASH_START_ADDRESS,
.len = MCU_FLASH_SIZE,
.blk_size = MCU_FLASH_PAGE_SIZE,
.ops = {NULL, fal_flash_read, fal_flash_write, fal_flash_erase},
.write_gran = 8
};
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#endif
#endif /* BSP_USING_ON_CHIP_FLASH */