252 lines
11 KiB
C
252 lines
11 KiB
C
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/******************************************************************************************************************************************
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* 文件名称: SWM341_sfc.c
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* 功能说明: SWM341单片机的SFC（Serial Flash Controller）模块驱动库
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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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*
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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 "SWM341.h"
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#include "SWM341_sfc.h"
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/******************************************************************************************************************************************
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* 函数名称: SFC_Init()
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* 功能说明: SFC（Serial Flash Controller）初始化
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* 输 入: SFC_InitStructure * initStruct SFC初始化配置值
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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 SFC_Init(SFC_InitStructure * initStruct)
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{
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SYS->CLKEN1 |= (1 << SYS_CLKEN1_SFC_Pos);
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*((__IO uint32_t *)((uint32_t )&SFC->CFG + 0x3F4)) = 7;
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SFC->CFG &= ~(SFC_CFG_CLKDIV_Msk | SFC_CFG_DATA4L_RD_Msk | SFC_CFG_DATA4L_PP_Msk);
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SFC->CFG |= (initStruct->ClkDiv << SFC_CFG_CLKDIV_Pos) |
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(initStruct->Width_Read << SFC_CFG_DATA4L_RD_Pos) |
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(initStruct->Width_PageProgram << SFC_CFG_DATA4L_PP_Pos);
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SFC->CFG |= (1 << SFC_CFG_CMDWREN_Pos);
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SFC->CMDAHB &= ~(SFC_CMDAHB_READ_Msk | SFC_CMDAHB_PP_Msk);
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SFC->CMDAHB |= (initStruct->Cmd_Read << SFC_CMDAHB_READ_Pos) |
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(initStruct->Cmd_PageProgram << SFC_CMDAHB_PP_Pos);
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SFC->CFG &= ~(1 << SFC_CFG_CMDWREN_Pos);
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SFC->TIM &= ~(SFC_TIM_WIP_CHK_ITV_Msk | SFC_TIM_WIP_CHK_LMT_Msk);
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SFC->TIM |= ((CyclesPerUs / 10) << SFC_TIM_WIP_CHK_ITV_Pos) | //2048 * (CyclesPerUs / 10) / CyclesPerUs us = 0.2 ms
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(255 << SFC_TIM_WIP_CHK_LMT_Pos);
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}
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/******************************************************************************************************************************************
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* 函数名称: SFC_ReadJEDEC()
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* 功能说明: 读取 JEDEC ID
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* 输 入: 无
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* 输 出: uint32_t JEDEC ID
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* 注意事项: 无
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******************************************************************************************************************************************/
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uint32_t SFC_ReadJEDEC(void)
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{
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SFC->CFG &= ~SFC_CFG_CMDTYPE_Msk;
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SFC->CFG |= (1 << SFC_CFG_CMDWREN_Pos) |
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(2 << SFC_CFG_CMDTYPE_Pos);
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SFC->CMD = SFC_CMD_READ_JEDEC;
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SFC->GO = 1;
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while(SFC->GO);
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return SFC->DATA;
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}
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/******************************************************************************************************************************************
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* 函数名称: SFC_Erase()
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* 功能说明: SPI Flash扇区擦除，每个扇区4K字节
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* 输 入: uint32_t addr 要擦除扇区的地址，必须4K对齐，即addr%4096 == 0
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* uint8_t wait 1 等待 Flash 完成擦除操作后再返回 0 发出擦除命令后立即返回
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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 SFC_Erase(uint32_t addr, uint8_t wait)
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{
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SFC_EraseEx(addr, SFC_CMD_ERASE_SECTOR, wait);
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}
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/******************************************************************************************************************************************
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* 函数名称: SFC_EraseEx()
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* 功能说明: SPI Flash擦除，通过提供不同的命令码支持片擦、块擦、扇区擦
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* 输 入: uint32_t addr 要擦除的块的地址，当 addr == 0xFFFFFFFF 时，执行片擦
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* uint8_t cmd 擦除命令码，有些SPI Flash支持多种大小的块的擦除，不同块大大小使用不同命令码
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* uint8_t wait 1 等待 Flash 完成擦除操作后再返回 0 发出擦除命令后立即返回
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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 SFC_EraseEx(uint32_t addr, uint8_t cmd, uint8_t wait)
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{
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uint8_t type = (addr == 0xFFFFFFFF) ? 5 : 7;
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SFC->ADDR = addr;
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SFC->CFG &= ~SFC_CFG_CMDTYPE_Msk;
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SFC->CFG |= (1 << SFC_CFG_WREN_Pos) |
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(1 << SFC_CFG_CMDWREN_Pos) |
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(type << SFC_CFG_CMDTYPE_Pos);
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SFC->CMD = cmd;
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SFC->GO = 1;
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for(int i = 0; i < CyclesPerUs; i++) __NOP(); //等待命令发出
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SFC->CFG &= ~SFC_CFG_WREN_Msk;
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if(wait)
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while(SFC_FlashBusy()) __NOP();
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}
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/******************************************************************************************************************************************
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* 函数名称: SFC_Write()
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* 功能说明: SPI Flash数据写入
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* 输 入: uint32_t addr 数据要写入到Flash中的地址，字对齐
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* uint32_t buff[] 要写入Flash中的数据
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* uint32_t cnt 要写的数据的个数，以字为单位，最大64
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* 输 出: 无
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* 注意事项: 要写入的数据必须全部在同一页内，即addr/256 == (addr+(cnt-1)*4)/256
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* 当 cnt > 4 时，LCD_DCLK 输出可能出现间断（|__|￣|__|￣|__|￣￣￣￣￣￣￣￣|__|￣|__|￣|__|），这种情况下有些屏幕会显示异常，遇
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* 到这种情况，可通过以 cnt = 4 多次调用 SFC_Write() 解决
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******************************************************************************************************************************************/
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void SFC_Write(uint32_t addr, uint32_t buff[], uint32_t cnt)
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{
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SFC->CFG |= (1 << SFC_CFG_WREN_Pos);
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for(int i = 0; i < cnt; i++)
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*((volatile unsigned int *)(0x70000000+addr+i*4)) = buff[i];
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while(SFC->SR & SFC_SR_BUSY_Msk) __NOP();
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SFC->CFG &= ~SFC_CFG_WREN_Msk;
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}
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/******************************************************************************************************************************************
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* 函数名称: SFC_Read()
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* 功能说明: SPI Flash数据读取
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* 输 入: uint32_t addr 要读取的数据在Flash中的地址，字对齐
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* uint32_t buff[] 读取到的数据存入buff指向的内存
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* uint32_t cnt 要读取的数据的个数，以字为单位
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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 SFC_Read(uint32_t addr, uint32_t buff[], uint32_t cnt)
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{
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for(int i = 0; i < cnt; i++)
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buff[i] = *((volatile unsigned int *)(0x70000000+addr+i*4));
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}
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/******************************************************************************************************************************************
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* 函数名称: SFC_ReadStatusReg()
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* 功能说明: SPI Flash读取状态寄存器
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* 输 入: uint8_t cmd 读取使用的命令码
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* 输 出: uint8_t 读到的状态寄存器值
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* 注意事项: 无
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******************************************************************************************************************************************/
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uint8_t SFC_ReadStatusReg(uint8_t cmd)
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{
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SFC->CFG &= ~SFC_CFG_CMDTYPE_Msk;
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SFC->CFG |= (1 << SFC_CFG_CMDWREN_Pos) |
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(1 << SFC_CFG_CMDTYPE_Pos);
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SFC->CMD = cmd;
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SFC->GO = 1;
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while(SFC->GO);
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return SFC->DATA;
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}
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/******************************************************************************************************************************************
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* 函数名称: SFC_WriteStatusReg()
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* 功能说明: SPI Flash写入状态寄存器
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* 输 入: uint8_t cmd 写入使用的命令码
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* uint16_t reg 要写入的状态寄存器值
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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 SFC_WriteStatusReg(uint8_t cmd, uint16_t reg)
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{
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SFC->CFG &= ~SFC_CFG_CMDTYPE_Msk;
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SFC->CFG |= (1 << SFC_CFG_WREN_Pos) |
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(1 << SFC_CFG_CMDWREN_Pos) |
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(6 << SFC_CFG_CMDTYPE_Pos);
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SFC->CMD = cmd;
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SFC->DATA = reg;
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SFC->GO = 1;
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while(SFC->GO);
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}
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/******************************************************************************************************************************************
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* 函数名称: SFC_QuadSwitch()
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* 功能说明: SPI Flash Quad模式开关
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* 输 入: uint8_t on 1 开启 Quad 模式 0 关闭 Quad 模式
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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 SFC_QuadSwitch(uint8_t on)
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{
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uint16_t reg = (SFC_ReadStatusReg(SFC_CMD_READ_STATUS_REG2) << 8) |
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(SFC_ReadStatusReg(SFC_CMD_READ_STATUS_REG1) << 0);
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if(on)
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reg |= (1 << SFC_STATUS_REG_QUAD_Pos);
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else
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reg &=~(1 << SFC_STATUS_REG_QUAD_Pos);
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SFC_WriteStatusReg(SFC_CMD_WRITE_STATUS_REG1, reg);
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}
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/******************************************************************************************************************************************
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* 函数名称: SFC_QuadState()
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* 功能说明: SPI Flash Quad模式开关状态查询
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* 输 入: 无
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* 输 出: 1 Quad 模式开启 0 Quad 模式关闭
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* 注意事项: 无
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******************************************************************************************************************************************/
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uint8_t SFC_QuadState(void)
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{
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uint8_t reg = SFC_ReadStatusReg(SFC_CMD_READ_STATUS_REG2);
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if(reg & (1 << (SFC_STATUS_REG_QUAD_Pos - 8)))
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return 1;
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else
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return 0;
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}
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/******************************************************************************************************************************************
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* 函数名称: SFC_FlashBusy()
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* 功能说明: SPI Flash Page Program、Sector Erase、Block Erase、Chip Erase 忙查询
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* 输 入: 无
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* 输 出: 1 Flash 正在执行 Erase/Write 操作 0 Flash 已完成 Erase/Write 操作
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* 注意事项: 无
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******************************************************************************************************************************************/
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uint8_t SFC_FlashBusy(void)
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{
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uint8_t reg = SFC_ReadStatusReg(SFC_CMD_READ_STATUS_REG1);
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if(reg & (1 << SFC_STATUS_REG_BUSY_Pos))
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return 1;
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else
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return 0;
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}
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