[mw_shl_code=c,true]void Flash_PageErase( int pg)
{
FADDRH = pg<<1;
FCTL |= 0x01; //启动页面擦除
while (FCTL & 0x80); //等待擦除完成
}[/mw_shl_code]
我用这段代码擦除35页的数据,但是在XDATA窗口看到的和读取出来放到数组里看到的都是0x00,并没有擦除,这是为什么啊?
而且我用DMA传输内存到flash的4字节数据,怎么都写不进去,底下是我的写函数,有没有高手指教一下。
[mw_shl_code=c,true]void WriteFlashDMA( uint16 saddr, uint16 length, uint16 flashadr) //Write Flash, DMA Method
//Length Must be Divisible by 4 or last bytes fail to write
{
uint16 tmp = 0;
//配置DMA通道每次传送一个字节
DMA_DESC dmaConfig0;//定义DMA通道
//MEMCTR|=0X07;//将bank 7 映射到Xdata区
dmaConfig0.SRCADDRH = (saddr >> 8) & 0x00FF; //XData - To Be Written to Flash - Gets Incremented;存储data的高8位;
dmaConfig0.SRCADDRL = saddr & 0x00FF;//存储data地址的低8位;
dmaConfig0.DESTADDRH = (((int)&FWDATA) >> 8) & 0x00FF; //Flash Controller Data Address - Flash Controller Writes Data//存储写寄存器的地址的高8位
dmaConfig0.DESTADDRL = ((int)&FWDATA) & 0x00FF;//存储写寄存器的低8位;
dmaConfig0.VLEN = 0; //Variable Length Transfer - 0=Fixed LEN Transfer//采用LEN作为传送长度
dmaConfig0.LENH = (length>>8) & 0x00FF; //Number of WORDSZIE in Transfer - Must be Divisible by 4 - NET_ADDR_SIZE=4//存储传送长度高5位
dmaConfig0.LENL = length & 0x00FF;//存储长度低8位;
dmaConfig0.WORDSIZE = 0; //Size of Each Transfer - 0=8 Bit;每个DMA传送采用8位传送
dmaConfig0.TMODE = 0; //Transfer Mode - 1=Block, 0=Single,传送模式为单一模式
dmaConfig0.TRIG = 18; //DMA Trigger - 0=Manual Via DMAREQ, 18=Flash;flash触发
dmaConfig0.SRCINC = 0; //Source Address Increment - 1=1 Byte//源地址增量模式为1字节/字
dmaConfig0.DESTINC = 1; //Destination Address Increment - 0=0 Bytes (Always Write to FWDATA, No Need to Increment)目标地址增量模式0字节/字
dmaConfig0.IRQMASK = 0; //Interrupt Mask - 0=Disable Interrupts//禁止通道完成中断产生
dmaConfig0.M8 = 0; //8th Bit Mode - 0=Use All 8 Bits使用全部8位作为传送长度
dmaConfig0.PRIORITY = 2; //Priority - 10(2)=High Priority优先级为DMA优先
//DMA模式写
while (FCTL & 0x80); //Wait Until DMA Controller is Available - Busy Bit 7//等待写或擦除状态被激活
/********* 存储写入flash页地址 ***********************************************/
FADDRH =(flashadr >> 8) & 0x00FF; // page size: 2048; select the flash page via FADDRH[7:1] bits//由于写入flash时是字(4字节)寻址的,所以存储高位需要右移2位;
FADDRL =(flashadr >> 0) & 0x00FF; //4字节寻址,存储要写入flash地址的低字节需要右移2位
//通道0配置地址
DMA0CFGH = (((int)&dmaConfig0) >> 8) & 0x00FF; //Pass DmaConfig0
DMA0CFGL = ((int)&dmaConfig0) & 0x00FF;
DMAARM |= 0x01; //Arm the DMA Channel//通道0进去工作状态
FCTL |= 0x02; //Start Write
//while (!(DMAIRQ & 0x01)); //Wait Until Write Complete
//DMAIRQ &= 0xFE; //Clear Any DMA IRQ on Channel 0 - Bit 0
while (FCTL & (0x80)); //Wait Until Flash Controller is Not Busy - Busy Bit 7//等待或者擦除状态激活
}[/mw_shl_code]
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