关于stm32f103芯片挂载sram 地址分配不成功问题

ddboy · 发表于 2018-10-12 14:07:03

硬件信息：芯片是stm32f103zet6
sram是is62wv102416dbll 45tli硬件连接关系：
A[0:19] FSMC_A[0:19]--------------PF[0:5]  PF[12:15] PG[0:5]  PD[11:13] PE3
I/O[0:15]  FSMC_D[0:15]------------PD[14,15]  PD[0,1]  PE[7:15]  PD[8:10]
UB-------NBL1----------PE1
LB--------NBL0----------PE0
OE-------NOE------------PD4
WE-------NWE-----------PD5
CS1-------NE3------------PG10
CS2-------NE4------------PG12
软件配置如下：
#define Bank1_SRAM3_ADDR ((u32)(0x60000000 | 0x08000000))

      FSMC_NORSRAMInitTypeDef  FSMC_NORSRAMInitStructure;
FSMC_NORSRAMTimingInitTypeDef  readWriteTiming;
GPIO_InitTypeDef  GPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_GPIOE|RCC_APB2Periph_GPIOF|RCC_APB2Periph_GPIOG|RCC_APB2Periph_AFIO,ENABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC,ENABLE);
      //PD[0,1]  [4,5]  [8:15]使能
GPIO_InitStructure.GPIO_Pin = 0xFF33;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOD, &GPIO_InitStructure);
      //PE[0,1] [3] [7,15]使能
GPIO_InitStructure.GPIO_Pin = 0xFF8B;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOE, &GPIO_InitStructure);
      //PF[0:5] [12,15]使能
GPIO_InitStructure.GPIO_Pin = 0xF03F;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOF, &GPIO_InitStructure);
      //PG[0:5] [10] [12]使能
GPIO_InitStructure.GPIO_Pin = 0x143F;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOG, &GPIO_InitStructure);

readWriteTiming.FSMC_AddressSetupTime = 0x00;
readWriteTiming.FSMC_AddressHoldTime = 0x00;
readWriteTiming.FSMC_DataSetupTime = 0x03;
readWriteTiming.FSMC_BusTurnAroundDuration = 0x00;
readWriteTiming.FSMC_CLKDivision = 0x00;
readWriteTiming.FSMC_DataLatency = 0x00;
readWriteTiming.FSMC_AccessMode = FSMC_AccessMode_A;

FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM3;

FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable;
FSMC_NORSRAMInitStructure.FSMC_MemoryType =FSMC_MemoryType_SRAM;//SRAM
FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;
FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode =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;
FSMC_NORSRAMInitStructure.FSMC_WaitSignal = FSMC_WaitSignal_Disable;
FSMC_NORSRAMInitStructure.FSMC_ExtendedMode = FSMC_ExtendedMode_Disable;
FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;
FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &readWriteTiming;
FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &readWriteTiming;

FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure);

FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM3, ENABLE);

出现问题：程序运行，使用malloc申请空间，地址申请失败在malloc.c 的  my_mem_malloc函数中的 if(!mallco_dev.memmap[memx][offset])cmemb++;中mallco_dev.memmap[memx][offset]的值是0x0004，这个是什么原因？