STM32的FSMC如果选用复用功能读写时序是不是就固定了啊，选模式都没有用，我用的是100脚的103VC，只能用数据地址复用模式，但是复用模式的读写时序不符合目标芯片的读写时序，尤其是写时序，读时序还可以
下面是我的FSMC初始化
void FSMC_SRAM_Init(void)
{
FSMC_NORSRAMInitTypeDef FSMC_NORSRAMInitStructure;
FSMC_NORSRAMTimingInitTypeDef p;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE, ENABLE);
/*-- GPIO Configuration ------------------------------------------------------*/
/* SRAM Data/Address lines configuration */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_8 | GPIO_Pin_9 |
GPIO_Pin_10 | GPIO_Pin_14 | GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 |
GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 |
GPIO_Pin_15;
GPIO_Init(GPIOE, &GPIO_InitStructure);
/* SRAM Address lines configuration */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6;
GPIO_Init(GPIOE, &GPIO_InitStructure);
/* NOE, NWE and NE1 configuration */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 |GPIO_Pin_5|GPIO_Pin_7;
GPIO_Init(GPIOD, &GPIO_InitStructure);
/* NBL0, NBL1 configuration */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
GPIO_Init(GPIOE, &GPIO_InitStructure);
/*NADV configuration */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/*-- FSMC Configuration ------------------------------------------------------*/
p.FSMC_AddressSetupTime = 1; /*ADDSET 地址建立时间*/
p.FSMC_AddressHoldTime = 4; /*ADDHOLD 地址保持时间*/
p.FSMC_DataSetupTime = 5; /*DATAST 数据建立时间*/
p.FSMC_BusTurnAroundDuration = 2; /*BUSTURN 总线返转时间*/
p.FSMC_CLKDivision = 2; /*CLKDIV 时钟分频*/
p.FSMC_DataLatency = 3; /*DATLAT 数据保持时间*/
p.FSMC_AccessMode = FSMC_AccessMode_D; /*ACCMOD FSMC 访问模式*/
/*选择设置的BANK及片选信号*/
FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM1;
/*设置是否数据地址总线分时复用*/
FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Enable;
/*设置存储器类型*/
FSMC_NORSRAMInitStructure.FSMC_MemoryType = FSMC_MemoryType_NOR;//FSMC_MemoryType_SRAM;//
/*设置数据宽度*/
FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;
/*设置是否使用成组访问模式*/
FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode = FSMC_BurstAccessMode_Disable;
/*设置WAIT信号的有效电平*/
FSMC_NORSRAMInitStructure.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_Low;
/*设置是否使用环回模式*/
FSMC_NORSRAMInitStructure.FSMC_WrapMode = FSMC_WrapMode_Disable;
/*设置WAIT信号有效时机*/
FSMC_NORSRAMInitStructure.FSMC_WaitSignalActive = FSMC_WaitSignalActive_BeforeWaitState;
/*设定是否使能写操作*/
FSMC_NORSRAMInitStructure.FSMC_WriteOperation = FSMC_WriteOperation_Enable;
/*设定是否使用WAIT信号*/
FSMC_NORSRAMInitStructure.FSMC_WaitSignal = FSMC_WaitSignal_Disable;
/*设定是否使用单独的写时序*/
FSMC_NORSRAMInitStructure.FSMC_ExtendedMode = FSMC_ExtendedMode_Disable;
/*设定是否使用成组写模式*/
FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;
/*设定读写时序*/
FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &p;
FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &p;
FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure);
/* Enable FSMC Bank1_SRAM Bank */
FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM1, ENABLE);
} |
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