96 lines
3.3 KiB
C
96 lines
3.3 KiB
C
/******************************************************************************************************************************************
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* 文件名称: SWM320_flash.c
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* 功能说明: 使用芯片的IAP功能将片上Flash模拟成EEPROM来保存数据，掉电后不丢失
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* 技术支持: http://www.synwit.com.cn/e/tool/gbook/?bid=1
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* 注意事项:
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* 版本日期: V1.1.0 2017年10月25日
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* 升级记录:
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*******************************************************************************************************************************************
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* @attention
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*
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* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS WITH CODING INFORMATION
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* REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. AS A RESULT, SYNWIT SHALL NOT BE HELD LIABLE
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* FOR ANY DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE CONTENT
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* OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION CONTAINED HEREIN IN CONN-
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* -ECTION WITH THEIR PRODUCTS.
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*
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* COPYRIGHT 2012 Synwit Technology
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*******************************************************************************************************************************************/
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#include "SWM320.h"
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#include "SWM320_flash.h"
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__attribute__((section("PlaceInRAM")))
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static void switchTo80M(void)
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{
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uint32_t i;
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for (i = 0; i < 50; i++) __NOP();
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FLASH->CFG0 = 0x4bf;
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FLASH->CFG1 = 0xabfc7a6e;
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for (i = 0; i < 50; i++) __NOP();
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}
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/******************************************************************************************************************************************
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* 函数名称: FLASH_Erase()
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* 功能说明: 片内Flash擦除
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* 输 入: uint32_t addr 擦除地址
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* 输 出: 无
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* 注意事项: 无
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******************************************************************************************************************************************/
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void FLASH_Erase(uint32_t addr)
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{
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// switchTo80M();
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FLASH->ERASE = addr | ((uint32_t)1 << FLASH_ERASE_REQ_Pos);
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while ((FLASH->STAT & FLASH_STAT_ERASE_GOING_Msk) == 0);
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while ((FLASH->STAT & FLASH_STAT_ERASE_GOING_Msk) == 1);
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FLASH->ERASE = 0;
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// switchTo40M();
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}
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/******************************************************************************************************************************************
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* 函数名称: FLASH_Write()
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* 功能说明: 片内Flash写入
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* 输 入: uint32_t addr 写入地址
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* uint32_t buff[] 要写入的数据
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* uint32_t size 要写入数据的个数，字为单位
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* 输 出: 无
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* 注意事项: 无
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******************************************************************************************************************************************/
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void FLASH_Write(uint32_t addr, uint32_t buff[], uint32_t size)
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{
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uint32_t i, j;
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switchTo80M();
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FLASH->CACHE |= (1 << FLASH_CACHE_PROG_Pos);
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for (i = 0; i < size / 4; i++)
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{
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FLASH->ADDR = addr + i * 4 * 4;
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for (j = 0; j < 4; j++)
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FLASH->DATA = buff[i * 4 + j];
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while ((FLASH->STAT & FLASH_STAT_FIFO_EMPTY_Msk) == 0) __NOP();
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}
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if ((size % 4) != 0)
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{
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FLASH->ADDR = addr + i * 4 * 4;
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for (j = 0; j < size % 4; j++)
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FLASH->DATA = buff[i * 4 + j];
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while ((FLASH->STAT & FLASH_STAT_FIFO_EMPTY_Msk) == 0) __NOP();
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}
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while (FLASH->STAT & FLASH_STAT_PROG_GOING_Msk);
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FLASH->CACHE |= (1 << FLASH_CACHE_CLEAR_Pos);
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FLASH->CACHE = 0;
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// switchTo40M();
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}
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