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/*
* File : flash.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006 - 2017, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2017-12-04 Haley the first version
*/
#include <rtthread.h>
#include <rtdevice.h>
#include "am_mcu_apollo.h"
#include "flash.h"
/* RT-Thread device interface */
static rt_err_t rt_flash_init(rt_device_t dev)
{
return RT_EOK;
}
static rt_err_t rt_flash_open(rt_device_t dev, rt_uint16_t oflag)
{
return RT_EOK;
}
static rt_err_t rt_flash_close(rt_device_t dev)
{
return RT_EOK;
}
static rt_err_t rt_flash_control(rt_device_t dev, int cmd, void *args)
{
uint32_t ui32Critical, i;
uint32_t ui32CurrentPage, ui32CurrentBlock;
if (cmd == RT_DEVICE_CTRL_BLK_GETGEOME)
{
struct rt_device_blk_geometry *geometry;
geometry = (struct rt_device_blk_geometry *)args;
if (geometry == RT_NULL)
return -RT_ERROR;
geometry->bytes_per_sector = 8192;
geometry->sector_count = 8192;
geometry->block_size = 8192;
}
else if(cmd == RT_DEVICE_CTRL_BLK_ERASE)
{
struct rom_control_erase *erase;
erase = (struct rom_control_erase *)args;
// Start a critical section.
ui32Critical = am_hal_interrupt_master_disable();
if (erase->type == 0x01)
{
for(i = 0; i < erase->pagenums; i++)
{
// Figure out what page and block we're working on.
ui32CurrentPage = AM_HAL_FLASH_ADDR2PAGE(erase->addrstart);
ui32CurrentBlock = AM_HAL_FLASH_ADDR2INST(erase->addrstart);
am_hal_flash_page_erase(AM_HAL_FLASH_PROGRAM_KEY, ui32CurrentBlock, ui32CurrentPage); //��������������
erase->addrstart += 8192;
}
}
// Exit the critical section.
am_hal_interrupt_master_set(ui32Critical);
}
return RT_EOK;
}
static rt_size_t rt_flash_read(rt_device_t dev,
rt_off_t pos,
void* buffer,
rt_size_t size)
{
rt_memcpy((uint8_t *)buffer, (uint8_t *)pos, size);
return size;
}
static rt_size_t rt_flash_write(rt_device_t dev,
rt_off_t pos,
const void* buffer,
rt_size_t size)
{
uint32_t ui32Critical;
uint32_t ui32WordsInBuffer;
ui32WordsInBuffer = (size + 3)/ 4;
// Start a critical section.
ui32Critical = am_hal_interrupt_master_disable();
// Program the flash page with the data we just received.
am_hal_flash_program_main(AM_HAL_FLASH_PROGRAM_KEY, (uint32_t *)buffer, (uint32_t *)pos, ui32WordsInBuffer);
// Exit the critical section.
am_hal_interrupt_master_set(ui32Critical);
return size;
}
int rt_hw_rom_init(void)
{
static struct rt_device device;
/* register device */
device.type = RT_Device_Class_Block;
device.init = rt_flash_init;
device.open = rt_flash_open;
device.close = rt_flash_close;
device.read = rt_flash_read;
device.write = rt_flash_write;
device.control = rt_flash_control;
/* no private */
device.user_data = RT_NULL;
/* register the device */
rt_device_register(&device, "rom", RT_DEVICE_FLAG_RDWR);
rt_kprintf("register device rom!\r\n");
return 0;
}
#ifdef RT_USING_COMPONENTS_INIT
INIT_DEVICE_EXPORT(rt_hw_rom_init);
#endif
/*@}*/
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