STM32 SRAM 数据地址复用程序问题
本帖最后由 q10083129 于 2018-4-30 15:06 编辑各位大侠好
我目前在编写FSMC初始化程序，给STM32F103VCT6外扩4MSRAM.，我在给仿真调试的时候，当我给0x60010001写入数据的时候，0x60110001，0x60210001，0x60310001。。。。0x63F10001，中的地址也会被写入相同的数据，而且我的SRAM只有4M，但keil中能读到0x63000000~0x63FFFFFF以内的数据，而且都是每隔1M内容重复。
下面是我的SRAM初始化程序以及system_stm32f10x.c中的函数和测试程序和电路图。
#include "sram.h"
#include "usart.h"
#define Bank1_SRAM3_ADDR ((u32)(0x60000000))
//³õʼ»¯ÍⲿSRAM
void FSMC_SRAM_Init(void)
{
FSMC_NORSRAMInitTypeDefFSMC_NORSRAMInitStructure;
FSMC_NORSRAMTimingInitTypeDefreadWriteTiming;
GPIO_InitTypeDefGPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOD|RCC_APB2Periph_GPIOE,ENABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC,ENABLE);
GPIO_InitStructure.GPIO_Pin = 0xDFB3; //PORTD¸´ÓÃÍÆÍìÊä³ö
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //¸´ÓÃÍÆÍìÊä³ö
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = 0xFF83; //PORTE¸´ÓÃÍÆÍìÊä³ö
GPIO_Init(GPIOE, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = 0x0080; //PORTE¸´ÓÃÍÆÍìÊä³ö
GPIO_Init(GPIOB, &GPIO_InitStructure);
readWriteTiming.FSMC_AddressSetupTime = 0x15;
readWriteTiming.FSMC_AddressHoldTime = 0x15;
readWriteTiming.FSMC_DataSetupTime = 0x0225;
readWriteTiming.FSMC_BusTurnAroundDuration = 0x15;
readWriteTiming.FSMC_CLKDivision = 0x00;
readWriteTiming.FSMC_DataLatency = 0x00;
readWriteTiming.FSMC_AccessMode = FSMC_AccessMode_B; //ģʽA
FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM1;//ÕâÀïÎÒÃÇʹÓÃNE3 £¬Ò²¾Í¶ÔÓ¦BTCR,¡£
FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Enable;
FSMC_NORSRAMInitStructure.FSMC_MemoryType =FSMC_MemoryType_NOR;// FSMC_MemoryType_SRAM;//SRAM
FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;//´æ´¢Æ÷Êý¾Ý¿í¶ÈΪ16bit
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; //´æ´¢Æ÷дʹÄÜ
FSMC_NORSRAMInitStructure.FSMC_WaitSignal = FSMC_WaitSignal_Disable;
FSMC_NORSRAMInitStructure.FSMC_ExtendedMode = FSMC_ExtendedMode_Disable; // ¶ÁдʹÓÃÏàͬµÄʱÐò
FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;
FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &readWriteTiming;
FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &readWriteTiming; //¶ÁдͬÑùʱÐò
FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure);//³õʼ»¯FSMCÅäÖÃ
FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM1, ENABLE);// ʹÄÜBANK3
}
void FSMC_SRAM_WriteBuffer(u8* pBuffer,u32 WriteAddr,u32 n)
{
for(;n!=0;n--)
{
*(vu8*)(Bank1_SRAM3_ADDR+WriteAddr)=*pBuffer;
WriteAddr+=4;
pBuffer++;
}
}
void FSMC_SRAM_ReadBuffer(u8* pBuffer,u32 ReadAddr,u32 n)
{
for(;n!=0;n--)
{
*pBuffer++=*(vu8*)(Bank1_SRAM3_ADDR+ReadAddr);
ReadAddr+=2;
}
}
void fsmc_sram_test_write(u8 data,u32 addr)
{
FSMC_SRAM_WriteBuffer(&data,addr,1);//дÈë1¸ö×Ö½Ú
}
u8 fsmc_sram_test_read(u32 addr)
{
u8 data;
FSMC_SRAM_ReadBuffer(&data,addr,1);
return data;
} 下面这个是system_stm32f10x.c中的函数
void SystemInit_ExtMemCtl(void)
{
/*!< FSMC Bank1 NOR/SRAM3 is used for the STM3210E-EVAL, if another Bank is
required, then adjust the Register Addresses */
/* Enable FSMC clock */
RCC->AHBENR = 0x00000114;
/* Enable GPIOD, GPIOE, GPIOF and GPIOG clocks */
RCC->APB2ENR = 0x000001E0;
/* ---------------SRAM Data lines, NOE and NWE configuration ---------------*/
/*----------------SRAM Address lines configuration -------------------------*/
/*----------------NOE and NWE configuration --------------------------------*/
/*----------------NE3 configuration ----------------------------------------*/
/*----------------NBL0, NBL1 configuration ---------------------------------*/
GPIOD->CRL = 0xB4BB44BB;
GPIOD->CRH = 0xBB4BBBBB;
GPIOE->CRL = 0xB44444BB;
GPIOE->CRH = 0xBBBBBBBB;
//GPIOF->CRL = 0x44BBBBBB;
//GPIOF->CRH = 0xBBBB4444;
//GPIOG->CRL = 0x44BBBBBB;
//GPIOG->CRH = 0x44444B44;
/*----------------FSMC Configuration ---------------------------------------*/
/*----------------Enable FSMC Bank1_SRAM Bank ------------------------------*/
FSMC_Bank1->BTCR = 0x00001011;
FSMC_Bank1->BTCR = 0x00000200;
// FSMC_Bank1->BTCR= 0x00001011;
//FSMC_Bank1->BTCR= 0x00000201;
//FSMC_Bank1E->BWTR = 0x0FFFFFFF;
// FSMC_Bank1->BTCR = 0x00001011;
//FSMC_Bank1->BTCR = 0x00000200;
}下面是测试程序
FSMC_SRAM_WriteBuffer(&temp,0x00010001,2);
有哪位大大能指点一下迷津，谢谢。
https://www.stmcu.org.cn/module/forum/forum.php?mod=image&aid=413133&size=300x300&key=5bb77a6302c8bd9b&nocache=yes&type=fixnone
谢谢各位大侠 本帖最后由 toofree 于 2018-5-1 00:38 编辑
这个主要得看STM32F103VCT6有多少根地址线，并且你用了多少根地址线。
超过的，它无法区分是低地址，还是高地址。
从你的现象看，说明你的FSMC_A19到FSMC_A23没有接。
从原理图看，的确没有接。
GPIO_InitStructure.GPIO_Pin = 0xDFB3; //2、3、6、13没管，13对FSMC_A18
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = 0xFF83; //2、3、4、5、6没管，对应FSMC_A19到A23
GPIO_Init(GPIOE, &GPIO_InitStructure);
但是这样，也是不对呀，从你的配置代码中看到FSMC_A18也没有配。而你实际用了的是A0到A17条地址线，16位数据，一共占用内存地址是512KB呀，也就是0x80000。你说的以1MB为间隔数据重复，这个有点讲不通，如果属实的话，应该是以512KB为单位重复呀。请看一下你的 0x60010001 + 0x80000*N地地址数据。
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