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在NANO3.1.3上面添加外部sram作为动态内存池报错

发布于 2020-04-16 16:58:24 浏览：1493 订阅该版

NANO3.1.3默认是用4K的数组作为动态内存池的，，单片机是STM32F407ZGT6我先把它改成使用片内剩余SRAM空间作为动态内存池成功了。但是使用片外IS62WV51216时失败报错了，单独把片外SRAM拿来读写测试了一下是正常的，但是一用做动态内存池就不行了，是什么原因呢？：
![3种方式的首尾地址设置.jpg](/uploads/202004/16/165455txpp3pth9hzunhhh.jpg)![3种方式的堆初始化.jpg](/uploads/202004/16/165455fgg1lnsrg5o5kp5g.jpg)![默认数组方式结果.jpg](/uploads/202004/16/165456uif66oo6935c9ez7.jpg)![使用片内剩余SRAM方式结果.jpg](/uploads/202004/16/165456sv8nyx0xs9qz0qa4.jpg)![使用外部SRAM方式结果.jpg](/uploads/202004/16/165456rol84q88mq488odp.jpg)下面代码是外部SRAM的初始化及读写测试代码。
```#include "sram.h"	  
#include "usart.h"	
#include <rtthread.h>

//使用NOR/SRAM的 Bank1.sector3,地址位HADDR[27,26]=10 
//对IS61LV25616/IS62WV25616,地址线范围为A0~A17 
//对IS61LV51216/IS62WV51216,地址线范围为A0~A18

#define Bank1_SRAM3_ADDR    ((u32)(0x68000000))	
  						   
//初始化外部SRAM
static int FSMC_SRAM_Init(void)
{	
	GPIO_InitTypeDef  GPIO_InitStructure;
	FSMC_NORSRAMInitTypeDef  FSMC_NORSRAMInitStructure;
  FSMC_NORSRAMTimingInitTypeDef  readWriteTiming; 
	
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB|RCC_AHB1Periph_GPIOD|RCC_AHB1Periph_GPIOE|RCC_AHB1Periph_GPIOF|RCC_AHB1Periph_GPIOG, ENABLE);//使能PD,PE,PF,PG时钟  
  RCC_AHB3PeriphClockCmd(RCC_AHB3Periph_FSMC,ENABLE);//使能FSMC时钟  
   
	
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;//PB15 推挽输出
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;//普通输出模式
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//100MHz
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
  GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化 //PB15 推挽输出

GPIO_InitStructure.GPIO_Pin = (3<<0)|(3<<4)|(0XFF<<8);//PD0,1,4,5,8~15 AF OUT
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用输出
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
  GPIO_Init(GPIOD, &GPIO_InitStructure);//初始化  
	
  GPIO_InitStructure.GPIO_Pin = (3<<0)|(0X1FF<<7);//PE0,1,7~15,AF OUT
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用输出
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
  GPIO_Init(GPIOE, &GPIO_InitStructure);//初始化  
	
 	GPIO_InitStructure.GPIO_Pin = (0X3F<<0)|(0XF<<12); 	//PF0~5,12~15
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用输出
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
  GPIO_Init(GPIOF, &GPIO_InitStructure);//初始化

GPIO_InitStructure.GPIO_Pin =(0X3F<<0)| GPIO_Pin_10;//PG0~5,10
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用输出
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
  GPIO_Init(GPIOG, &GPIO_InitStructure);//初始化 
 
 
  GPIO_PinAFConfig(GPIOD,GPIO_PinSource0,GPIO_AF_FSMC);//PD0,AF12
  GPIO_PinAFConfig(GPIOD,GPIO_PinSource1,GPIO_AF_FSMC);//PD1,AF12
  GPIO_PinAFConfig(GPIOD,GPIO_PinSource4,GPIO_AF_FSMC);
  GPIO_PinAFConfig(GPIOD,GPIO_PinSource5,GPIO_AF_FSMC); 
  GPIO_PinAFConfig(GPIOD,GPIO_PinSource8,GPIO_AF_FSMC); 
  GPIO_PinAFConfig(GPIOD,GPIO_PinSource9,GPIO_AF_FSMC);
  GPIO_PinAFConfig(GPIOD,GPIO_PinSource10,GPIO_AF_FSMC);
  GPIO_PinAFConfig(GPIOD,GPIO_PinSource11,GPIO_AF_FSMC);
	GPIO_PinAFConfig(GPIOD,GPIO_PinSource12,GPIO_AF_FSMC);
  GPIO_PinAFConfig(GPIOD,GPIO_PinSource13,GPIO_AF_FSMC);
  GPIO_PinAFConfig(GPIOD,GPIO_PinSource14,GPIO_AF_FSMC);
  GPIO_PinAFConfig(GPIOD,GPIO_PinSource15,GPIO_AF_FSMC);//PD15,AF12
 
  GPIO_PinAFConfig(GPIOE,GPIO_PinSource0,GPIO_AF_FSMC);
  GPIO_PinAFConfig(GPIOE,GPIO_PinSource1,GPIO_AF_FSMC);
	GPIO_PinAFConfig(GPIOE,GPIO_PinSource7,GPIO_AF_FSMC);//PE7,AF12
  GPIO_PinAFConfig(GPIOE,GPIO_PinSource8,GPIO_AF_FSMC);
  GPIO_PinAFConfig(GPIOE,GPIO_PinSource9,GPIO_AF_FSMC);
  GPIO_PinAFConfig(GPIOE,GPIO_PinSource10,GPIO_AF_FSMC);
  GPIO_PinAFConfig(GPIOE,GPIO_PinSource11,GPIO_AF_FSMC);
  GPIO_PinAFConfig(GPIOE,GPIO_PinSource12,GPIO_AF_FSMC);
  GPIO_PinAFConfig(GPIOE,GPIO_PinSource13,GPIO_AF_FSMC);
  GPIO_PinAFConfig(GPIOE,GPIO_PinSource14,GPIO_AF_FSMC);
  GPIO_PinAFConfig(GPIOE,GPIO_PinSource15,GPIO_AF_FSMC);//PE15,AF12
 
  GPIO_PinAFConfig(GPIOF,GPIO_PinSource0,GPIO_AF_FSMC);//PF0,AF12
  GPIO_PinAFConfig(GPIOF,GPIO_PinSource1,GPIO_AF_FSMC);//PF1,AF12
  GPIO_PinAFConfig(GPIOF,GPIO_PinSource2,GPIO_AF_FSMC);//PF2,AF12
  GPIO_PinAFConfig(GPIOF,GPIO_PinSource3,GPIO_AF_FSMC);//PF3,AF12
  GPIO_PinAFConfig(GPIOF,GPIO_PinSource4,GPIO_AF_FSMC);//PF4,AF12
  GPIO_PinAFConfig(GPIOF,GPIO_PinSource5,GPIO_AF_FSMC);//PF5,AF12
  GPIO_PinAFConfig(GPIOF,GPIO_PinSource12,GPIO_AF_FSMC);//PF12,AF12
  GPIO_PinAFConfig(GPIOF,GPIO_PinSource13,GPIO_AF_FSMC);//PF13,AF12
  GPIO_PinAFConfig(GPIOF,GPIO_PinSource14,GPIO_AF_FSMC);//PF14,AF12
  GPIO_PinAFConfig(GPIOF,GPIO_PinSource15,GPIO_AF_FSMC);//PF15,AF12
	
  GPIO_PinAFConfig(GPIOG,GPIO_PinSource0,GPIO_AF_FSMC);
  GPIO_PinAFConfig(GPIOG,GPIO_PinSource1,GPIO_AF_FSMC);
  GPIO_PinAFConfig(GPIOG,GPIO_PinSource2,GPIO_AF_FSMC);
  GPIO_PinAFConfig(GPIOG,GPIO_PinSource3,GPIO_AF_FSMC);
  GPIO_PinAFConfig(GPIOG,GPIO_PinSource4,GPIO_AF_FSMC);
  GPIO_PinAFConfig(GPIOG,GPIO_PinSource5,GPIO_AF_FSMC);
  GPIO_PinAFConfig(GPIOG,GPIO_PinSource10,GPIO_AF_FSMC);
	
 	  
  readWriteTiming.FSMC_AddressSetupTime = 0x00;	 //地址建立时间（ADDSET）
  readWriteTiming.FSMC_AddressHoldTime = 0x00;	 //地址保持时间（ADDHLD）模式A未用到	
  readWriteTiming.FSMC_DataSetupTime = 0x08;		 ////数据保持时间（DATAST）为9个HCLK 6*9=54ns	 	 
  readWriteTiming.FSMC_BusTurnAroundDuration = 0x00;
  readWriteTiming.FSMC_CLKDivision = 0x00;
  readWriteTiming.FSMC_DataLatency = 0x00;
  readWriteTiming.FSMC_AccessMode = FSMC_AccessMode_A;	 //模式A

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BANK1区域3	
	return 0;
}
INIT_BOARD_EXPORT(FSMC_SRAM_Init); 														  
//在指定地址(WriteAddr+Bank1_SRAM3_ADDR)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++;
		pBuffer++;
	}   
}																			    
//在指定地址((WriteAddr+Bank1_SRAM3_ADDR))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++;
	}  
} 
 
//外部内存测试(最大支持1M字节内存测试)	    
void fsmc_sram_test(u16 x,u16 y)
{  
	u32 i=0;  	  
	u8 temp=0;	   
	u8 sval=0;	//在地址0读到的数据	  				   
	//每隔4K字节,写入一个数据,总共写入256个数据,刚好是1M字节
	for(i=0;i<1024*1024;i+=4096)
	{
		FSMC_SRAM_WriteBuffer(&temp,i,1);
		temp++;
	}
	//依次读出之前写入的数据,进行校验		  
 	for(i=0;i<1024*1024;i+=4096) 
	{
  		FSMC_SRAM_ReadBuffer(&temp,i,1);
		if(i==0)sval=temp;
 		else if(temp<=sval)break;//后面读出的数据一定要比第一次读到的数据大.	   		     
		rt_kprintf("Ex Memory Test: %dKB<br>", (temp-sval+1)*4);   
 	}					 
}	
MSH_CMD_EXPORT(fsmc_sram_test, fsmc_sram_test);```![片外SRAM读写正常测试.jpg](/uploads/202004/16/165456reh4v2l2wpahf6ca.jpg)