65 lines
2.8 KiB
C
65 lines
2.8 KiB
C
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/********************************** (C) COPYRIGHT *******************************
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* File Name : DataFlash.C
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* Author : WCH
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* Version : V1.0
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* Date : 2017/01/20
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* Description : CH554 DataFlash字节读写函数定义
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*******************************************************************************/
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#include "..\Public\CH554.H"
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#include "..\Public\Debug.H"
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#include "DataFlash.H"
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/*******************************************************************************
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* Function Name : WriteDataFlash(UINT8 Addr,PUINT8 buf,UINT8 len)
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* Description : DataFlash写
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* Input : UINT8 Addr，PUINT16 buf,UINT8 len
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* Output : None
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* Return : UINT8 i 返回写入长度
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*******************************************************************************/
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UINT8 WriteDataFlash(UINT8 Addr,PUINT8 buf,UINT8 len)
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{
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UINT8 i;
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SAFE_MOD = 0x55;
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SAFE_MOD = 0xAA; //进入安全模式
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GLOBAL_CFG |= bDATA_WE; //使能DataFlash写
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SAFE_MOD = 0; //退出安全模式
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ROM_ADDR_H = DATA_FLASH_ADDR >> 8;
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Addr <<= 1;
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for(i=0;i<len;i++)
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{
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ROM_ADDR_L = Addr + i*2;
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ROM_DATA_L = *(buf+i);
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if ( ROM_STATUS & bROM_ADDR_OK ) { // 操作地址有效
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ROM_CTRL = ROM_CMD_WRITE; // 写入
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}
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if((ROM_STATUS ^ bROM_ADDR_OK) > 0) return i; // 返回状态,0x00=success, 0x02=unknown command(bROM_CMD_ERR)
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}
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SAFE_MOD = 0x55;
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SAFE_MOD = 0xAA; //进入安全模式
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GLOBAL_CFG &= ~bDATA_WE; //开启DataFlash写保护
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SAFE_MOD = 0; //退出安全模式
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return i;
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}
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/*******************************************************************************
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* Function Name : ReadDataFlash(UINT8 Addr,UINT8 len,PUINT8 buf)
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* Description : 读DataFlash
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* Input : UINT8 Addr UINT8 len PUINT8 buf
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* Output : None
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* Return : UINT8 i 返回写入长度
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*******************************************************************************/
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UINT8 ReadDataFlash(UINT8 Addr,UINT8 len,PUINT8 buf)
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{
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UINT8 i;
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ROM_ADDR_H = DATA_FLASH_ADDR >> 8;
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Addr <<= 1;
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for(i=0;i<len;i++){
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ROM_ADDR_L = Addr + i*2; //Addr必须为偶地址
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ROM_CTRL = ROM_CMD_READ;
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// if ( ROM_STATUS & bROM_CMD_ERR ) return( 0xFF ); // unknown command
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*(buf+i) = ROM_DATA_L;
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}
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return i;
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} |