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