CC2530内部 Flash读写程序.rar

#include "main.h" /************************************************************************************************** * @fn FLASH_Write * * @brief This function writes 'num_bytes' bytes to the uint16_ternal flash. * * input parameters * * @param addr - Valid flash write address: actual addr / 4 and quad-aligned. * @param data - Valid buffer space at least as big as 'cnt' X 4. * @param num_bytes - Number of bytes to write, MUST be Divisible by 4. * * output parameters * * None. * * @return None. ************************************************************************************************** */ void FLASH_Write(uint16_t addr,uint8_t *data, uint16_t num_bytes) { //配置DMA通道每次传送一个字节 DMADesc_t dmaConfig0;//定义DMA通道 dmaConfig0.SRCADDRH = ((uint16_t)data >> 8) & 0x00FF; //XData - To Be Written to Flash - Gets Incremented；存储data的高8位； dmaConfig0.SRCADDRL = (uint16_t)data & 0x00FF;//存储data地址的低8位； dmaConfig0.DESTADDRH = (((uint16_t)&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 = ((uint16_t)&FWDATA) & 0x00FF;//存储写寄存器的低8位； dmaConfig0.VLEN = 0; //Variable num_bytes Transfer - 0=Fixed LEN Transfer//采用LEN作为传送长度 dmaConfig0.LENH = (num_bytes>>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 = num_bytes & 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 = 1; //Source Address Increment - 1=1 Byte//源地址增量模式为1字节/字 dmaConfig0.DESTINC = 0; //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; //uint16_terrupt Mask - 0=Disable uint16_terrupts//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 =(addr >> 10) & 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 =(addr >> 2) & 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 = (((uint16_t)&dmaConfig0) >> 8) & 0x00FF; //Pass DmaConfig0 DMA0CFGL = ((uint16_t)&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 return; } /************************************************************************************************** * @fn FLASH_PageErase * * @brief This function erases flash page of the 'pageNum'th page. * * input parameters * * @param pageNum - Valid flash page num. * * output parameters * * None. * * @return None. ************************************************************************************************** */ void FLASH_PageErase(uint8_t pageNum) { EA=0; while(FCTL & 0x80);//等待闪存控制器整备好 FADDRH = pageNum << 1;//选择擦除页面的序号，共128页 FCTL |= 0x01;//启动页面擦除 while(FCTL & 0x80);//等待擦除完成 EA=1; } /************************************************************************************************** * @fn FLASH_Read * * @brief This function reads 'num_bytes' bytes from flash address addr to array data. * * input parameters * * @param addr - Valid flash read address: . * @param data - Valid buffer space to store the data. * @param num_bytes - Number of bytes to read. * * output parameters * * None. * * @return None. ************************************************************************************************** */ void FLASH_Read(uint16_t addr,uint8_t* data,uint8_t num_bytes) { uint8_t old_map; uint8_t bank_num; uint16_t offset; uint8_t old_ea; old_ea = EA; EA = 0; // close global interrupt bank_num = (addr>>FLASH_BANK_SHIFT)&FLASH_BANK_MAP_MASK; offset = (addr & (FLASH_BANK_SIZE-1))+FLASH_BASE_ADDR; old_map = MEMCTR; MEMCTR = (old_map&~0X7)|bank_num; //map the correct flash bank to XBANK memcpy(data,(uint8_t*)offset,num_bytes); MEMCTR = old_map; EA = old_ea; return; }