- FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM3;// 这里我们使用NE3 ，也就对应BTCR[4],[5]。
- FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable;
- FSMC_NORSRAMInitStructure.FSMC_MemoryType =FSMC_MemoryType_SRAM;// FSMC_MemoryType_SRAM; //SRAM
- FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;//存储器数据宽度为16bit
- FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode =FSMC_BurstAccessMode_Disable;// FSMC_BurstAccessMode_Disable;
- FSMC_NORSRAMInitStructure.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_Low;
- FSMC_NORSRAMInitStructure.FSMC_AsynchronousWait=FSMC_AsynchronousWait_Disable;
- FSMC_NORSRAMInitStructure.FSMC_WrapMode = FSMC_WrapMode_Disable;
- FSMC_NORSRAMInitStructure.FSMC_WaitSignalActive = FSMC_WaitSignalActive_BeforeWaitState;
- FSMC_NORSRAMInitStructure.FSMC_WriteOperation = FSMC_WriteOperation_Enable; //存储器写使能
- FSMC_NORSRAMInitStructure.FSMC_WaitSignal = FSMC_WaitSignal_Disable;
- FSMC_NORSRAMInitStructure.FSMC_ExtendedMode = FSMC_ExtendedMode_Disable; // 读写使用相同的时序
- FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;
- FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &readWriteTiming;
- FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &readWriteTiming; //读写同样时序
- FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure); //初始化FSMC配置
- FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM3, ENABLE); // 使能BANK3
- }
- //在指定地址开始,连续写入n个字节.
- //pBuffer:字节指针
- //WriteAddr:要写入的地址
- //n:要写入的字节数
- void FSMC_SRAM_WriteBuffer(u8* pBuffer,u32 WriteAddr,u32 n)
- {
- for(;n!=0;n--)
- {
- *(vu8*)(Bank1_SRAM3_ADDR+WriteAddr)=*pBuffer;
- WriteAddr+=2;//这里需要加2，是因为STM32的FSMC地址右移一位对其.加2相当于加1.
- pBuffer++;
- }
- }
- //在指定地址开始,连续读出n个字节.
- //pBuffer:字节指针
- //ReadAddr:要读出的起始地址
- //n:要写入的字节数
- void FSMC_SRAM_ReadBuffer(u8* pBuffer,u32 ReadAddr,u32 n)
- {
- for(;n!=0;n--)
- {
- *pBuffer++=*(vu8*)(Bank1_SRAM3_ADDR+ReadAddr);
- ReadAddr+=2;//这里需要加2，是因为STM32的FSMC地址右移一位对其.加2相当于加1.
- }
- }
- ////////////////////////////////////////////////////////////////////////////////////////
- //测试函数
- //在指定地址写入1个字节
- //addr:地址
- //data:要写入的数据
- void fsmc_sram_test_write(u8 data,u32 addr)
- {
- FSMC_SRAM_WriteBuffer(&data,addr,1);//写入1个字节
- }
- //读取1个字节
- //addr:要读取的地址
- //返回值:读取到的数据
- u8 fsmc_sram_test_read(u32 addr)
- {
- u8 data;
- FSMC_SRAM_ReadBuffer(&data,addr,1);
- return data;
- }
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